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infrastructure/clusters/cl01tl/manifests/traefik/CustomResourceDefinition-gateways.gateway.networking.k8s.io

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---
#
# config/crd/standard/gateway.networking.k8s.io_gateways.yaml
#
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
api-approved.kubernetes.io: https://github.com/kubernetes-sigs/gateway-api/pull/3328
gateway.networking.k8s.io/bundle-version: v1.4.0
gateway.networking.k8s.io/channel: standard
name: gateways.gateway.networking.k8s.io
spec:
group: gateway.networking.k8s.io
names:
categories:
- gateway-api
kind: Gateway
listKind: GatewayList
plural: gateways
shortNames:
- gtw
singular: gateway
scope: Namespaced
versions:
- additionalPrinterColumns:
- jsonPath: .spec.gatewayClassName
name: Class
type: string
- jsonPath: .status.addresses[*].value
name: Address
type: string
- jsonPath: .status.conditions[?(@.type=="Programmed")].status
name: Programmed
type: string
- jsonPath: .metadata.creationTimestamp
name: Age
type: date
name: v1
schema:
openAPIV3Schema:
description: |-
Gateway represents an instance of a service-traffic handling infrastructure
by binding Listeners to a set of IP addresses.
properties:
apiVersion:
description: |-
APIVersion defines the versioned schema of this representation of an object.
Servers should convert recognized schemas to the latest internal value, and
may reject unrecognized values.
More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
type: string
kind:
description: |-
Kind is a string value representing the REST resource this object represents.
Servers may infer this from the endpoint the client submits requests to.
Cannot be updated.
In CamelCase.
More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
type: string
metadata:
type: object
spec:
description: Spec defines the desired state of Gateway.
properties:
addresses:
description: |-
Addresses requested for this Gateway. This is optional and behavior can
depend on the implementation. If a value is set in the spec and the
requested address is invalid or unavailable, the implementation MUST
indicate this in an associated entry in GatewayStatus.Conditions.
The Addresses field represents a request for the address(es) on the
"outside of the Gateway", that traffic bound for this Gateway will use.
This could be the IP address or hostname of an external load balancer or
other networking infrastructure, or some other address that traffic will
be sent to.
If no Addresses are specified, the implementation MAY schedule the
Gateway in an implementation-specific manner, assigning an appropriate
set of Addresses.
The implementation MUST bind all Listeners to every GatewayAddress that
it assigns to the Gateway and add a corresponding entry in
GatewayStatus.Addresses.
Support: Extended
items:
description: GatewaySpecAddress describes an address that can be bound to a Gateway.
oneOf:
- properties:
type:
enum:
- IPAddress
value:
anyOf:
- format: ipv4
- format: ipv6
- properties:
type:
not:
enum:
- IPAddress
properties:
type:
default: IPAddress
description: Type of the address.
maxLength: 253
minLength: 1
pattern: ^Hostname|IPAddress|NamedAddress|[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*\/[A-Za-z0-9\/\-._~%!$&'()*+,;=:]+$
type: string
value:
description: |-
When a value is unspecified, an implementation SHOULD automatically
assign an address matching the requested type if possible.
If an implementation does not support an empty value, they MUST set the
"Programmed" condition in status to False with a reason of "AddressNotAssigned".
Examples: `1.2.3.4`, `128::1`, `my-ip-address`.
maxLength: 253
type: string
type: object
x-kubernetes-validations:
- message: Hostname value must be empty or contain only valid characters (matching ^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$)
rule: 'self.type == ''Hostname'' ? (!has(self.value) || self.value.matches(r"""^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$""")): true'
maxItems: 16
type: array
x-kubernetes-list-type: atomic
x-kubernetes-validations:
- message: IPAddress values must be unique
rule: 'self.all(a1, a1.type == ''IPAddress'' && has(a1.value) ? self.exists_one(a2, a2.type == a1.type && has(a2.value) && a2.value == a1.value) : true )'
- message: Hostname values must be unique
rule: 'self.all(a1, a1.type == ''Hostname'' && has(a1.value) ? self.exists_one(a2, a2.type == a1.type && has(a2.value) && a2.value == a1.value) : true )'
gatewayClassName:
description: |-
GatewayClassName used for this Gateway. This is the name of a
GatewayClass resource.
maxLength: 253
minLength: 1
type: string
infrastructure:
description: |-
Infrastructure defines infrastructure level attributes about this Gateway instance.
Support: Extended
properties:
annotations:
additionalProperties:
description: |-
AnnotationValue is the value of an annotation in Gateway API. This is used
for validation of maps such as TLS options. This roughly matches Kubernetes
annotation validation, although the length validation in that case is based
on the entire size of the annotations struct.
maxLength: 4096
minLength: 0
type: string
description: |-
Annotations that SHOULD be applied to any resources created in response to this Gateway.
For implementations creating other Kubernetes objects, this should be the `metadata.annotations` field on resources.
For other implementations, this refers to any relevant (implementation specific) "annotations" concepts.
An implementation may chose to add additional implementation-specific annotations as they see fit.
Support: Extended
maxProperties: 8
type: object
x-kubernetes-validations:
- message: Annotation keys must be in the form of an optional DNS subdomain prefix followed by a required name segment of up to 63 characters.
rule: self.all(key, key.matches(r"""^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?([A-Za-z0-9][-A-Za-z0-9_.]{0,61})?[A-Za-z0-9]$"""))
- message: If specified, the annotation key's prefix must be a DNS subdomain not longer than 253 characters in total.
rule: self.all(key, key.split("/")[0].size() < 253)
labels:
additionalProperties:
description: |-
LabelValue is the value of a label in the Gateway API. This is used for validation
of maps such as Gateway infrastructure labels. This matches the Kubernetes
label validation rules:
* must be 63 characters or less (can be empty),
* unless empty, must begin and end with an alphanumeric character ([a-z0-9A-Z]),
* could contain dashes (-), underscores (_), dots (.), and alphanumerics between.
Valid values include:
* MyValue
* my.name
* 123-my-value
maxLength: 63
minLength: 0
pattern: ^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?$
type: string
description: |-
Labels that SHOULD be applied to any resources created in response to this Gateway.
For implementations creating other Kubernetes objects, this should be the `metadata.labels` field on resources.
For other implementations, this refers to any relevant (implementation specific) "labels" concepts.
An implementation may chose to add additional implementation-specific labels as they see fit.
If an implementation maps these labels to Pods, or any other resource that would need to be recreated when labels
change, it SHOULD clearly warn about this behavior in documentation.
Support: Extended
maxProperties: 8
type: object
x-kubernetes-validations:
- message: Label keys must be in the form of an optional DNS subdomain prefix followed by a required name segment of up to 63 characters.
rule: self.all(key, key.matches(r"""^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?([A-Za-z0-9][-A-Za-z0-9_.]{0,61})?[A-Za-z0-9]$"""))
- message: If specified, the label key's prefix must be a DNS subdomain not longer than 253 characters in total.
rule: self.all(key, key.split("/")[0].size() < 253)
parametersRef:
description: |-
ParametersRef is a reference to a resource that contains the configuration
parameters corresponding to the Gateway. This is optional if the
controller does not require any additional configuration.
This follows the same semantics as GatewayClass's `parametersRef`, but on a per-Gateway basis
The Gateway's GatewayClass may provide its own `parametersRef`. When both are specified,
the merging behavior is implementation specific.
It is generally recommended that GatewayClass provides defaults that can be overridden by a Gateway.
If the referent cannot be found, refers to an unsupported kind, or when
the data within that resource is malformed, the Gateway SHOULD be
rejected with the "Accepted" status condition set to "False" and an
"InvalidParameters" reason.
Support: Implementation-specific
properties:
group:
description: Group is the group of the referent.
maxLength: 253
pattern: ^$|^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
kind:
description: Kind is kind of the referent.
maxLength: 63
minLength: 1
pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$
type: string
name:
description: Name is the name of the referent.
maxLength: 253
minLength: 1
type: string
required:
- group
- kind
- name
type: object
type: object
listeners:
description: |-
Listeners associated with this Gateway. Listeners define
logical endpoints that are bound on this Gateway's addresses.
At least one Listener MUST be specified.
## Distinct Listeners
Each Listener in a set of Listeners (for example, in a single Gateway)
MUST be _distinct_, in that a traffic flow MUST be able to be assigned to
exactly one listener. (This section uses "set of Listeners" rather than
"Listeners in a single Gateway" because implementations MAY merge configuration
from multiple Gateways onto a single data plane, and these rules _also_
apply in that case).
Practically, this means that each listener in a set MUST have a unique
combination of Port, Protocol, and, if supported by the protocol, Hostname.
Some combinations of port, protocol, and TLS settings are considered
Core support and MUST be supported by implementations based on the objects
they support:
HTTPRoute
1. HTTPRoute, Port: 80, Protocol: HTTP
2. HTTPRoute, Port: 443, Protocol: HTTPS, TLS Mode: Terminate, TLS keypair provided
TLSRoute
1. TLSRoute, Port: 443, Protocol: TLS, TLS Mode: Passthrough
"Distinct" Listeners have the following property:
**The implementation can match inbound requests to a single distinct
Listener**.
When multiple Listeners share values for fields (for
example, two Listeners with the same Port value), the implementation
can match requests to only one of the Listeners using other
Listener fields.
When multiple listeners have the same value for the Protocol field, then
each of the Listeners with matching Protocol values MUST have different
values for other fields.
The set of fields that MUST be different for a Listener differs per protocol.
The following rules define the rules for what fields MUST be considered for
Listeners to be distinct with each protocol currently defined in the
Gateway API spec.
The set of listeners that all share a protocol value MUST have _different_
values for _at least one_ of these fields to be distinct:
* **HTTP, HTTPS, TLS**: Port, Hostname
* **TCP, UDP**: Port
One **very** important rule to call out involves what happens when an
implementation:
* Supports TCP protocol Listeners, as well as HTTP, HTTPS, or TLS protocol
Listeners, and
* sees HTTP, HTTPS, or TLS protocols with the same `port` as one with TCP
Protocol.
In this case all the Listeners that share a port with the
TCP Listener are not distinct and so MUST NOT be accepted.
If an implementation does not support TCP Protocol Listeners, then the
previous rule does not apply, and the TCP Listeners SHOULD NOT be
accepted.
Note that the `tls` field is not used for determining if a listener is distinct, because
Listeners that _only_ differ on TLS config will still conflict in all cases.
### Listeners that are distinct only by Hostname
When the Listeners are distinct based only on Hostname, inbound request
hostnames MUST match from the most specific to least specific Hostname
values to choose the correct Listener and its associated set of Routes.
Exact matches MUST be processed before wildcard matches, and wildcard
matches MUST be processed before fallback (empty Hostname value)
matches. For example, `"foo.example.com"` takes precedence over
`"*.example.com"`, and `"*.example.com"` takes precedence over `""`.
Additionally, if there are multiple wildcard entries, more specific
wildcard entries must be processed before less specific wildcard entries.
For example, `"*.foo.example.com"` takes precedence over `"*.example.com"`.
The precise definition here is that the higher the number of dots in the
hostname to the right of the wildcard character, the higher the precedence.
The wildcard character will match any number of characters _and dots_ to
the left, however, so `"*.example.com"` will match both
`"foo.bar.example.com"` _and_ `"bar.example.com"`.
## Handling indistinct Listeners
If a set of Listeners contains Listeners that are not distinct, then those
Listeners are _Conflicted_, and the implementation MUST set the "Conflicted"
condition in the Listener Status to "True".
The words "indistinct" and "conflicted" are considered equivalent for the
purpose of this documentation.
Implementations MAY choose to accept a Gateway with some Conflicted
Listeners only if they only accept the partial Listener set that contains
no Conflicted Listeners.
Specifically, an implementation MAY accept a partial Listener set subject to
the following rules:
* The implementation MUST NOT pick one conflicting Listener as the winner.
ALL indistinct Listeners must not be accepted for processing.
* At least one distinct Listener MUST be present, or else the Gateway effectively
contains _no_ Listeners, and must be rejected from processing as a whole.
The implementation MUST set a "ListenersNotValid" condition on the
Gateway Status when the Gateway contains Conflicted Listeners whether or
not they accept the Gateway. That Condition SHOULD clearly
indicate in the Message which Listeners are conflicted, and which are
Accepted. Additionally, the Listener status for those listeners SHOULD
indicate which Listeners are conflicted and not Accepted.
## General Listener behavior
Note that, for all distinct Listeners, requests SHOULD match at most one Listener.
For example, if Listeners are defined for "foo.example.com" and "*.example.com", a
request to "foo.example.com" SHOULD only be routed using routes attached
to the "foo.example.com" Listener (and not the "*.example.com" Listener).
This concept is known as "Listener Isolation", and it is an Extended feature
of Gateway API. Implementations that do not support Listener Isolation MUST
clearly document this, and MUST NOT claim support for the
`GatewayHTTPListenerIsolation` feature.
Implementations that _do_ support Listener Isolation SHOULD claim support
for the Extended `GatewayHTTPListenerIsolation` feature and pass the associated
conformance tests.
## Compatible Listeners
A Gateway's Listeners are considered _compatible_ if:
1. They are distinct.
2. The implementation can serve them in compliance with the Addresses
requirement that all Listeners are available on all assigned
addresses.
Compatible combinations in Extended support are expected to vary across
implementations. A combination that is compatible for one implementation
may not be compatible for another.
For example, an implementation that cannot serve both TCP and UDP listeners
on the same address, or cannot mix HTTPS and generic TLS listens on the same port
would not consider those cases compatible, even though they are distinct.
Implementations MAY merge separate Gateways onto a single set of
Addresses if all Listeners across all Gateways are compatible.
In a future release the MinItems=1 requirement MAY be dropped.
Support: Core
items:
description: |-
Listener embodies the concept of a logical endpoint where a Gateway accepts
network connections.
properties:
allowedRoutes:
default:
namespaces:
from: Same
description: |-
AllowedRoutes defines the types of routes that MAY be attached to a
Listener and the trusted namespaces where those Route resources MAY be
present.
Although a client request may match multiple route rules, only one rule
may ultimately receive the request. Matching precedence MUST be
determined in order of the following criteria:
* The most specific match as defined by the Route type.
* The oldest Route based on creation timestamp. For example, a Route with
a creation timestamp of "2020-09-08 01:02:03" is given precedence over
a Route with a creation timestamp of "2020-09-08 01:02:04".
* If everything else is equivalent, the Route appearing first in
alphabetical order (namespace/name) should be given precedence. For
example, foo/bar is given precedence over foo/baz.
All valid rules within a Route attached to this Listener should be
implemented. Invalid Route rules can be ignored (sometimes that will mean
the full Route). If a Route rule transitions from valid to invalid,
support for that Route rule should be dropped to ensure consistency. For
example, even if a filter specified by a Route rule is invalid, the rest
of the rules within that Route should still be supported.
Support: Core
properties:
kinds:
description: |-
Kinds specifies the groups and kinds of Routes that are allowed to bind
to this Gateway Listener. When unspecified or empty, the kinds of Routes
selected are determined using the Listener protocol.
A RouteGroupKind MUST correspond to kinds of Routes that are compatible
with the application protocol specified in the Listener's Protocol field.
If an implementation does not support or recognize this resource type, it
MUST set the "ResolvedRefs" condition to False for this Listener with the
"InvalidRouteKinds" reason.
Support: Core
items:
description: RouteGroupKind indicates the group and kind of a Route resource.
properties:
group:
default: gateway.networking.k8s.io
description: Group is the group of the Route.
maxLength: 253
pattern: ^$|^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
kind:
description: Kind is the kind of the Route.
maxLength: 63
minLength: 1
pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$
type: string
required:
- kind
type: object
maxItems: 8
type: array
x-kubernetes-list-type: atomic
namespaces:
default:
from: Same
description: |-
Namespaces indicates namespaces from which Routes may be attached to this
Listener. This is restricted to the namespace of this Gateway by default.
Support: Core
properties:
from:
default: Same
description: |-
From indicates where Routes will be selected for this Gateway. Possible
values are:
* All: Routes in all namespaces may be used by this Gateway.
* Selector: Routes in namespaces selected by the selector may be used by
this Gateway.
* Same: Only Routes in the same namespace may be used by this Gateway.
Support: Core
enum:
- All
- Selector
- Same
type: string
selector:
description: |-
Selector must be specified when From is set to "Selector". In that case,
only Routes in Namespaces matching this Selector will be selected by this
Gateway. This field is ignored for other values of "From".
Support: Core
properties:
matchExpressions:
description: matchExpressions is a list of label selector requirements. The requirements are ANDed.
items:
description: |-
A label selector requirement is a selector that contains values, a key, and an operator that
relates the key and values.
properties:
key:
description: key is the label key that the selector applies to.
type: string
operator:
description: |-
operator represents a key's relationship to a set of values.
Valid operators are In, NotIn, Exists and DoesNotExist.
type: string
values:
description: |-
values is an array of string values. If the operator is In or NotIn,
the values array must be non-empty. If the operator is Exists or DoesNotExist,
the values array must be empty. This array is replaced during a strategic
merge patch.
items:
type: string
type: array
x-kubernetes-list-type: atomic
required:
- key
- operator
type: object
type: array
x-kubernetes-list-type: atomic
matchLabels:
additionalProperties:
type: string
description: |-
matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels
map is equivalent to an element of matchExpressions, whose key field is "key", the
operator is "In", and the values array contains only "value". The requirements are ANDed.
type: object
type: object
x-kubernetes-map-type: atomic
type: object
type: object
hostname:
description: |-
Hostname specifies the virtual hostname to match for protocol types that
define this concept. When unspecified, all hostnames are matched. This
field is ignored for protocols that don't require hostname based
matching.
Implementations MUST apply Hostname matching appropriately for each of
the following protocols:
* TLS: The Listener Hostname MUST match the SNI.
* HTTP: The Listener Hostname MUST match the Host header of the request.
* HTTPS: The Listener Hostname SHOULD match both the SNI and Host header.
Note that this does not require the SNI and Host header to be the same.
The semantics of this are described in more detail below.
To ensure security, Section 11.1 of RFC-6066 emphasizes that server
implementations that rely on SNI hostname matching MUST also verify
hostnames within the application protocol.
Section 9.1.2 of RFC-7540 provides a mechanism for servers to reject the
reuse of a connection by responding with the HTTP 421 Misdirected Request
status code. This indicates that the origin server has rejected the
request because it appears to have been misdirected.
To detect misdirected requests, Gateways SHOULD match the authority of
the requests with all the SNI hostname(s) configured across all the
Gateway Listeners on the same port and protocol:
* If another Listener has an exact match or more specific wildcard entry,
the Gateway SHOULD return a 421.
* If the current Listener (selected by SNI matching during ClientHello)
does not match the Host:
* If another Listener does match the Host the Gateway SHOULD return a
421.
* If no other Listener matches the Host, the Gateway MUST return a
404.
For HTTPRoute and TLSRoute resources, there is an interaction with the
`spec.hostnames` array. When both listener and route specify hostnames,
there MUST be an intersection between the values for a Route to be
accepted. For more information, refer to the Route specific Hostnames
documentation.
Hostnames that are prefixed with a wildcard label (`*.`) are interpreted
as a suffix match. That means that a match for `*.example.com` would match
both `test.example.com`, and `foo.test.example.com`, but not `example.com`.
Support: Core
maxLength: 253
minLength: 1
pattern: ^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
name:
description: |-
Name is the name of the Listener. This name MUST be unique within a
Gateway.
Support: Core
maxLength: 253
minLength: 1
pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
port:
description: |-
Port is the network port. Multiple listeners may use the
same port, subject to the Listener compatibility rules.
Support: Core
format: int32
maximum: 65535
minimum: 1
type: integer
protocol:
description: |-
Protocol specifies the network protocol this listener expects to receive.
Support: Core
maxLength: 255
minLength: 1
pattern: ^[a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9])?$|[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*\/[A-Za-z0-9]+$
type: string
tls:
description: |-
TLS is the TLS configuration for the Listener. This field is required if
the Protocol field is "HTTPS" or "TLS". It is invalid to set this field
if the Protocol field is "HTTP", "TCP", or "UDP".
The association of SNIs to Certificate defined in ListenerTLSConfig is
defined based on the Hostname field for this listener.
The GatewayClass MUST use the longest matching SNI out of all
available certificates for any TLS handshake.
Support: Core
properties:
certificateRefs:
description: |-
CertificateRefs contains a series of references to Kubernetes objects that
contains TLS certificates and private keys. These certificates are used to
establish a TLS handshake for requests that match the hostname of the
associated listener.
A single CertificateRef to a Kubernetes Secret has "Core" support.
Implementations MAY choose to support attaching multiple certificates to
a Listener, but this behavior is implementation-specific.
References to a resource in different namespace are invalid UNLESS there
is a ReferenceGrant in the target namespace that allows the certificate
to be attached. If a ReferenceGrant does not allow this reference, the
"ResolvedRefs" condition MUST be set to False for this listener with the
"RefNotPermitted" reason.
This field is required to have at least one element when the mode is set
to "Terminate" (default) and is optional otherwise.
CertificateRefs can reference to standard Kubernetes resources, i.e.
Secret, or implementation-specific custom resources.
Support: Core - A single reference to a Kubernetes Secret of type kubernetes.io/tls
Support: Implementation-specific (More than one reference or other resource types)
items:
description: |-
SecretObjectReference identifies an API object including its namespace,
defaulting to Secret.
The API object must be valid in the cluster; the Group and Kind must
be registered in the cluster for this reference to be valid.
References to objects with invalid Group and Kind are not valid, and must
be rejected by the implementation, with appropriate Conditions set
on the containing object.
properties:
group:
default: ""
description: |-
Group is the group of the referent. For example, "gateway.networking.k8s.io".
When unspecified or empty string, core API group is inferred.
maxLength: 253
pattern: ^$|^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
kind:
default: Secret
description: Kind is kind of the referent. For example "Secret".
maxLength: 63
minLength: 1
pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$
type: string
name:
description: Name is the name of the referent.
maxLength: 253
minLength: 1
type: string
namespace:
description: |-
Namespace is the namespace of the referenced object. When unspecified, the local
namespace is inferred.
Note that when a namespace different than the local namespace is specified,
a ReferenceGrant object is required in the referent namespace to allow that
namespace's owner to accept the reference. See the ReferenceGrant
documentation for details.
Support: Core
maxLength: 63
minLength: 1
pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?$
type: string
required:
- name
type: object
maxItems: 64
type: array
x-kubernetes-list-type: atomic
mode:
default: Terminate
description: |-
Mode defines the TLS behavior for the TLS session initiated by the client.
There are two possible modes:
- Terminate: The TLS session between the downstream client and the
Gateway is terminated at the Gateway. This mode requires certificates
to be specified in some way, such as populating the certificateRefs
field.
- Passthrough: The TLS session is NOT terminated by the Gateway. This
implies that the Gateway can't decipher the TLS stream except for
the ClientHello message of the TLS protocol. The certificateRefs field
is ignored in this mode.
Support: Core
enum:
- Terminate
- Passthrough
type: string
options:
additionalProperties:
description: |-
AnnotationValue is the value of an annotation in Gateway API. This is used
for validation of maps such as TLS options. This roughly matches Kubernetes
annotation validation, although the length validation in that case is based
on the entire size of the annotations struct.
maxLength: 4096
minLength: 0
type: string
description: |-
Options are a list of key/value pairs to enable extended TLS
configuration for each implementation. For example, configuring the
minimum TLS version or supported cipher suites.
A set of common keys MAY be defined by the API in the future. To avoid
any ambiguity, implementation-specific definitions MUST use
domain-prefixed names, such as `example.com/my-custom-option`.
Un-prefixed names are reserved for key names defined by Gateway API.
Support: Implementation-specific
maxProperties: 16
type: object
type: object
x-kubernetes-validations:
- message: certificateRefs or options must be specified when mode is Terminate
rule: 'self.mode == ''Terminate'' ? size(self.certificateRefs) > 0 || size(self.options) > 0 : true'
required:
- name
- port
- protocol
type: object
maxItems: 64
minItems: 1
type: array
x-kubernetes-list-map-keys:
- name
x-kubernetes-list-type: map
x-kubernetes-validations:
- message: tls must not be specified for protocols ['HTTP', 'TCP', 'UDP']
rule: 'self.all(l, l.protocol in [''HTTP'', ''TCP'', ''UDP''] ? !has(l.tls) : true)'
- message: tls mode must be Terminate for protocol HTTPS
rule: 'self.all(l, (l.protocol == ''HTTPS'' && has(l.tls)) ? (l.tls.mode == '''' || l.tls.mode == ''Terminate'') : true)'
- message: hostname must not be specified for protocols ['TCP', 'UDP']
rule: 'self.all(l, l.protocol in [''TCP'', ''UDP''] ? (!has(l.hostname) || l.hostname == '''') : true)'
- message: Listener name must be unique within the Gateway
rule: self.all(l1, self.exists_one(l2, l1.name == l2.name))
- message: Combination of port, protocol and hostname must be unique for each listener
rule: 'self.all(l1, self.exists_one(l2, l1.port == l2.port && l1.protocol == l2.protocol && (has(l1.hostname) && has(l2.hostname) ? l1.hostname == l2.hostname : !has(l1.hostname) && !has(l2.hostname))))'
required:
- gatewayClassName
- listeners
type: object
status:
default:
conditions:
- lastTransitionTime: "1970-01-01T00:00:00Z"
message: Waiting for controller
reason: Pending
status: Unknown
type: Accepted
- lastTransitionTime: "1970-01-01T00:00:00Z"
message: Waiting for controller
reason: Pending
status: Unknown
type: Programmed
description: Status defines the current state of Gateway.
properties:
addresses:
description: |-
Addresses lists the network addresses that have been bound to the
Gateway.
This list may differ from the addresses provided in the spec under some
conditions:
* no addresses are specified, all addresses are dynamically assigned
* a combination of specified and dynamic addresses are assigned
* a specified address was unusable (e.g. already in use)
items:
description: GatewayStatusAddress describes a network address that is bound to a Gateway.
oneOf:
- properties:
type:
enum:
- IPAddress
value:
anyOf:
- format: ipv4
- format: ipv6
- properties:
type:
not:
enum:
- IPAddress
properties:
type:
default: IPAddress
description: Type of the address.
maxLength: 253
minLength: 1
pattern: ^Hostname|IPAddress|NamedAddress|[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*\/[A-Za-z0-9\/\-._~%!$&'()*+,;=:]+$
type: string
value:
description: |-
Value of the address. The validity of the values will depend
on the type and support by the controller.
Examples: `1.2.3.4`, `128::1`, `my-ip-address`.
maxLength: 253
minLength: 1
type: string
required:
- value
type: object
x-kubernetes-validations:
- message: Hostname value must only contain valid characters (matching ^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$)
rule: 'self.type == ''Hostname'' ? self.value.matches(r"""^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$"""): true'
maxItems: 16
type: array
x-kubernetes-list-type: atomic
conditions:
default:
- lastTransitionTime: "1970-01-01T00:00:00Z"
message: Waiting for controller
reason: Pending
status: Unknown
type: Accepted
- lastTransitionTime: "1970-01-01T00:00:00Z"
message: Waiting for controller
reason: Pending
status: Unknown
type: Programmed
description: |-
Conditions describe the current conditions of the Gateway.
Implementations should prefer to express Gateway conditions
using the `GatewayConditionType` and `GatewayConditionReason`
constants so that operators and tools can converge on a common
vocabulary to describe Gateway state.
Known condition types are:
* "Accepted"
* "Programmed"
* "Ready"
items:
description: Condition contains details for one aspect of the current state of this API Resource.
properties:
lastTransitionTime:
description: |-
lastTransitionTime is the last time the condition transitioned from one status to another.
This should be when the underlying condition changed. If that is not known, then using the time when the API field changed is acceptable.
format: date-time
type: string
message:
description: |-
message is a human readable message indicating details about the transition.
This may be an empty string.
maxLength: 32768
type: string
observedGeneration:
description: |-
observedGeneration represents the .metadata.generation that the condition was set based upon.
For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date
with respect to the current state of the instance.
format: int64
minimum: 0
type: integer
reason:
description: |-
reason contains a programmatic identifier indicating the reason for the condition's last transition.
Producers of specific condition types may define expected values and meanings for this field,
and whether the values are considered a guaranteed API.
The value should be a CamelCase string.
This field may not be empty.
maxLength: 1024
minLength: 1
pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
type: string
status:
description: status of the condition, one of True, False, Unknown.
enum:
- "True"
- "False"
- Unknown
type: string
type:
description: type of condition in CamelCase or in foo.example.com/CamelCase.
maxLength: 316
pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
type: string
required:
- lastTransitionTime
- message
- reason
- status
- type
type: object
maxItems: 8
type: array
x-kubernetes-list-map-keys:
- type
x-kubernetes-list-type: map
listeners:
description: Listeners provide status for each unique listener port defined in the Spec.
items:
description: ListenerStatus is the status associated with a Listener.
properties:
attachedRoutes:
description: |-
AttachedRoutes represents the total number of Routes that have been
successfully attached to this Listener.
Successful attachment of a Route to a Listener is based solely on the
combination of the AllowedRoutes field on the corresponding Listener
and the Route's ParentRefs field. A Route is successfully attached to
a Listener when it is selected by the Listener's AllowedRoutes field
AND the Route has a valid ParentRef selecting the whole Gateway
resource or a specific Listener as a parent resource (more detail on
attachment semantics can be found in the documentation on the various
Route kinds ParentRefs fields). Listener or Route status does not impact
successful attachment, i.e. the AttachedRoutes field count MUST be set
for Listeners with condition Accepted: false and MUST count successfully
attached Routes that may themselves have Accepted: false conditions.
Uses for this field include troubleshooting Route attachment and
measuring blast radius/impact of changes to a Listener.
format: int32
type: integer
conditions:
description: Conditions describe the current condition of this listener.
items:
description: Condition contains details for one aspect of the current state of this API Resource.
properties:
lastTransitionTime:
description: |-
lastTransitionTime is the last time the condition transitioned from one status to another.
This should be when the underlying condition changed. If that is not known, then using the time when the API field changed is acceptable.
format: date-time
type: string
message:
description: |-
message is a human readable message indicating details about the transition.
This may be an empty string.
maxLength: 32768
type: string
observedGeneration:
description: |-
observedGeneration represents the .metadata.generation that the condition was set based upon.
For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date
with respect to the current state of the instance.
format: int64
minimum: 0
type: integer
reason:
description: |-
reason contains a programmatic identifier indicating the reason for the condition's last transition.
Producers of specific condition types may define expected values and meanings for this field,
and whether the values are considered a guaranteed API.
The value should be a CamelCase string.
This field may not be empty.
maxLength: 1024
minLength: 1
pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
type: string
status:
description: status of the condition, one of True, False, Unknown.
enum:
- "True"
- "False"
- Unknown
type: string
type:
description: type of condition in CamelCase or in foo.example.com/CamelCase.
maxLength: 316
pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
type: string
required:
- lastTransitionTime
- message
- reason
- status
- type
type: object
maxItems: 8
type: array
x-kubernetes-list-map-keys:
- type
x-kubernetes-list-type: map
name:
description: Name is the name of the Listener that this status corresponds to.
maxLength: 253
minLength: 1
pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
supportedKinds:
description: |-
SupportedKinds is the list indicating the Kinds supported by this
listener. This MUST represent the kinds an implementation supports for
that Listener configuration.
If kinds are specified in Spec that are not supported, they MUST NOT
appear in this list and an implementation MUST set the "ResolvedRefs"
condition to "False" with the "InvalidRouteKinds" reason. If both valid
and invalid Route kinds are specified, the implementation MUST
reference the valid Route kinds that have been specified.
items:
description: RouteGroupKind indicates the group and kind of a Route resource.
properties:
group:
default: gateway.networking.k8s.io
description: Group is the group of the Route.
maxLength: 253
pattern: ^$|^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
kind:
description: Kind is the kind of the Route.
maxLength: 63
minLength: 1
pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$
type: string
required:
- kind
type: object
maxItems: 8
type: array
x-kubernetes-list-type: atomic
required:
- attachedRoutes
- conditions
- name
- supportedKinds
type: object
maxItems: 64
type: array
x-kubernetes-list-map-keys:
- name
x-kubernetes-list-type: map
type: object
required:
- spec
type: object
served: true
storage: true
subresources:
status: {}
- additionalPrinterColumns:
- jsonPath: .spec.gatewayClassName
name: Class
type: string
- jsonPath: .status.addresses[*].value
name: Address
type: string
- jsonPath: .status.conditions[?(@.type=="Programmed")].status
name: Programmed
type: string
- jsonPath: .metadata.creationTimestamp
name: Age
type: date
name: v1beta1
schema:
openAPIV3Schema:
description: |-
Gateway represents an instance of a service-traffic handling infrastructure
by binding Listeners to a set of IP addresses.
properties:
apiVersion:
description: |-
APIVersion defines the versioned schema of this representation of an object.
Servers should convert recognized schemas to the latest internal value, and
may reject unrecognized values.
More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
type: string
kind:
description: |-
Kind is a string value representing the REST resource this object represents.
Servers may infer this from the endpoint the client submits requests to.
Cannot be updated.
In CamelCase.
More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
type: string
metadata:
type: object
spec:
description: Spec defines the desired state of Gateway.
properties:
addresses:
description: |-
Addresses requested for this Gateway. This is optional and behavior can
depend on the implementation. If a value is set in the spec and the
requested address is invalid or unavailable, the implementation MUST
indicate this in an associated entry in GatewayStatus.Conditions.
The Addresses field represents a request for the address(es) on the
"outside of the Gateway", that traffic bound for this Gateway will use.
This could be the IP address or hostname of an external load balancer or
other networking infrastructure, or some other address that traffic will
be sent to.
If no Addresses are specified, the implementation MAY schedule the
Gateway in an implementation-specific manner, assigning an appropriate
set of Addresses.
The implementation MUST bind all Listeners to every GatewayAddress that
it assigns to the Gateway and add a corresponding entry in
GatewayStatus.Addresses.
Support: Extended
items:
description: GatewaySpecAddress describes an address that can be bound to a Gateway.
oneOf:
- properties:
type:
enum:
- IPAddress
value:
anyOf:
- format: ipv4
- format: ipv6
- properties:
type:
not:
enum:
- IPAddress
properties:
type:
default: IPAddress
description: Type of the address.
maxLength: 253
minLength: 1
pattern: ^Hostname|IPAddress|NamedAddress|[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*\/[A-Za-z0-9\/\-._~%!$&'()*+,;=:]+$
type: string
value:
description: |-
When a value is unspecified, an implementation SHOULD automatically
assign an address matching the requested type if possible.
If an implementation does not support an empty value, they MUST set the
"Programmed" condition in status to False with a reason of "AddressNotAssigned".
Examples: `1.2.3.4`, `128::1`, `my-ip-address`.
maxLength: 253
type: string
type: object
x-kubernetes-validations:
- message: Hostname value must be empty or contain only valid characters (matching ^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$)
rule: 'self.type == ''Hostname'' ? (!has(self.value) || self.value.matches(r"""^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$""")): true'
maxItems: 16
type: array
x-kubernetes-list-type: atomic
x-kubernetes-validations:
- message: IPAddress values must be unique
rule: 'self.all(a1, a1.type == ''IPAddress'' && has(a1.value) ? self.exists_one(a2, a2.type == a1.type && has(a2.value) && a2.value == a1.value) : true )'
- message: Hostname values must be unique
rule: 'self.all(a1, a1.type == ''Hostname'' && has(a1.value) ? self.exists_one(a2, a2.type == a1.type && has(a2.value) && a2.value == a1.value) : true )'
gatewayClassName:
description: |-
GatewayClassName used for this Gateway. This is the name of a
GatewayClass resource.
maxLength: 253
minLength: 1
type: string
infrastructure:
description: |-
Infrastructure defines infrastructure level attributes about this Gateway instance.
Support: Extended
properties:
annotations:
additionalProperties:
description: |-
AnnotationValue is the value of an annotation in Gateway API. This is used
for validation of maps such as TLS options. This roughly matches Kubernetes
annotation validation, although the length validation in that case is based
on the entire size of the annotations struct.
maxLength: 4096
minLength: 0
type: string
description: |-
Annotations that SHOULD be applied to any resources created in response to this Gateway.
For implementations creating other Kubernetes objects, this should be the `metadata.annotations` field on resources.
For other implementations, this refers to any relevant (implementation specific) "annotations" concepts.
An implementation may chose to add additional implementation-specific annotations as they see fit.
Support: Extended
maxProperties: 8
type: object
x-kubernetes-validations:
- message: Annotation keys must be in the form of an optional DNS subdomain prefix followed by a required name segment of up to 63 characters.
rule: self.all(key, key.matches(r"""^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?([A-Za-z0-9][-A-Za-z0-9_.]{0,61})?[A-Za-z0-9]$"""))
- message: If specified, the annotation key's prefix must be a DNS subdomain not longer than 253 characters in total.
rule: self.all(key, key.split("/")[0].size() < 253)
labels:
additionalProperties:
description: |-
LabelValue is the value of a label in the Gateway API. This is used for validation
of maps such as Gateway infrastructure labels. This matches the Kubernetes
label validation rules:
* must be 63 characters or less (can be empty),
* unless empty, must begin and end with an alphanumeric character ([a-z0-9A-Z]),
* could contain dashes (-), underscores (_), dots (.), and alphanumerics between.
Valid values include:
* MyValue
* my.name
* 123-my-value
maxLength: 63
minLength: 0
pattern: ^(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])?$
type: string
description: |-
Labels that SHOULD be applied to any resources created in response to this Gateway.
For implementations creating other Kubernetes objects, this should be the `metadata.labels` field on resources.
For other implementations, this refers to any relevant (implementation specific) "labels" concepts.
An implementation may chose to add additional implementation-specific labels as they see fit.
If an implementation maps these labels to Pods, or any other resource that would need to be recreated when labels
change, it SHOULD clearly warn about this behavior in documentation.
Support: Extended
maxProperties: 8
type: object
x-kubernetes-validations:
- message: Label keys must be in the form of an optional DNS subdomain prefix followed by a required name segment of up to 63 characters.
rule: self.all(key, key.matches(r"""^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?([A-Za-z0-9][-A-Za-z0-9_.]{0,61})?[A-Za-z0-9]$"""))
- message: If specified, the label key's prefix must be a DNS subdomain not longer than 253 characters in total.
rule: self.all(key, key.split("/")[0].size() < 253)
parametersRef:
description: |-
ParametersRef is a reference to a resource that contains the configuration
parameters corresponding to the Gateway. This is optional if the
controller does not require any additional configuration.
This follows the same semantics as GatewayClass's `parametersRef`, but on a per-Gateway basis
The Gateway's GatewayClass may provide its own `parametersRef`. When both are specified,
the merging behavior is implementation specific.
It is generally recommended that GatewayClass provides defaults that can be overridden by a Gateway.
If the referent cannot be found, refers to an unsupported kind, or when
the data within that resource is malformed, the Gateway SHOULD be
rejected with the "Accepted" status condition set to "False" and an
"InvalidParameters" reason.
Support: Implementation-specific
properties:
group:
description: Group is the group of the referent.
maxLength: 253
pattern: ^$|^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
kind:
description: Kind is kind of the referent.
maxLength: 63
minLength: 1
pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$
type: string
name:
description: Name is the name of the referent.
maxLength: 253
minLength: 1
type: string
required:
- group
- kind
- name
type: object
type: object
listeners:
description: |-
Listeners associated with this Gateway. Listeners define
logical endpoints that are bound on this Gateway's addresses.
At least one Listener MUST be specified.
## Distinct Listeners
Each Listener in a set of Listeners (for example, in a single Gateway)
MUST be _distinct_, in that a traffic flow MUST be able to be assigned to
exactly one listener. (This section uses "set of Listeners" rather than
"Listeners in a single Gateway" because implementations MAY merge configuration
from multiple Gateways onto a single data plane, and these rules _also_
apply in that case).
Practically, this means that each listener in a set MUST have a unique
combination of Port, Protocol, and, if supported by the protocol, Hostname.
Some combinations of port, protocol, and TLS settings are considered
Core support and MUST be supported by implementations based on the objects
they support:
HTTPRoute
1. HTTPRoute, Port: 80, Protocol: HTTP
2. HTTPRoute, Port: 443, Protocol: HTTPS, TLS Mode: Terminate, TLS keypair provided
TLSRoute
1. TLSRoute, Port: 443, Protocol: TLS, TLS Mode: Passthrough
"Distinct" Listeners have the following property:
**The implementation can match inbound requests to a single distinct
Listener**.
When multiple Listeners share values for fields (for
example, two Listeners with the same Port value), the implementation
can match requests to only one of the Listeners using other
Listener fields.
When multiple listeners have the same value for the Protocol field, then
each of the Listeners with matching Protocol values MUST have different
values for other fields.
The set of fields that MUST be different for a Listener differs per protocol.
The following rules define the rules for what fields MUST be considered for
Listeners to be distinct with each protocol currently defined in the
Gateway API spec.
The set of listeners that all share a protocol value MUST have _different_
values for _at least one_ of these fields to be distinct:
* **HTTP, HTTPS, TLS**: Port, Hostname
* **TCP, UDP**: Port
One **very** important rule to call out involves what happens when an
implementation:
* Supports TCP protocol Listeners, as well as HTTP, HTTPS, or TLS protocol
Listeners, and
* sees HTTP, HTTPS, or TLS protocols with the same `port` as one with TCP
Protocol.
In this case all the Listeners that share a port with the
TCP Listener are not distinct and so MUST NOT be accepted.
If an implementation does not support TCP Protocol Listeners, then the
previous rule does not apply, and the TCP Listeners SHOULD NOT be
accepted.
Note that the `tls` field is not used for determining if a listener is distinct, because
Listeners that _only_ differ on TLS config will still conflict in all cases.
### Listeners that are distinct only by Hostname
When the Listeners are distinct based only on Hostname, inbound request
hostnames MUST match from the most specific to least specific Hostname
values to choose the correct Listener and its associated set of Routes.
Exact matches MUST be processed before wildcard matches, and wildcard
matches MUST be processed before fallback (empty Hostname value)
matches. For example, `"foo.example.com"` takes precedence over
`"*.example.com"`, and `"*.example.com"` takes precedence over `""`.
Additionally, if there are multiple wildcard entries, more specific
wildcard entries must be processed before less specific wildcard entries.
For example, `"*.foo.example.com"` takes precedence over `"*.example.com"`.
The precise definition here is that the higher the number of dots in the
hostname to the right of the wildcard character, the higher the precedence.
The wildcard character will match any number of characters _and dots_ to
the left, however, so `"*.example.com"` will match both
`"foo.bar.example.com"` _and_ `"bar.example.com"`.
## Handling indistinct Listeners
If a set of Listeners contains Listeners that are not distinct, then those
Listeners are _Conflicted_, and the implementation MUST set the "Conflicted"
condition in the Listener Status to "True".
The words "indistinct" and "conflicted" are considered equivalent for the
purpose of this documentation.
Implementations MAY choose to accept a Gateway with some Conflicted
Listeners only if they only accept the partial Listener set that contains
no Conflicted Listeners.
Specifically, an implementation MAY accept a partial Listener set subject to
the following rules:
* The implementation MUST NOT pick one conflicting Listener as the winner.
ALL indistinct Listeners must not be accepted for processing.
* At least one distinct Listener MUST be present, or else the Gateway effectively
contains _no_ Listeners, and must be rejected from processing as a whole.
The implementation MUST set a "ListenersNotValid" condition on the
Gateway Status when the Gateway contains Conflicted Listeners whether or
not they accept the Gateway. That Condition SHOULD clearly
indicate in the Message which Listeners are conflicted, and which are
Accepted. Additionally, the Listener status for those listeners SHOULD
indicate which Listeners are conflicted and not Accepted.
## General Listener behavior
Note that, for all distinct Listeners, requests SHOULD match at most one Listener.
For example, if Listeners are defined for "foo.example.com" and "*.example.com", a
request to "foo.example.com" SHOULD only be routed using routes attached
to the "foo.example.com" Listener (and not the "*.example.com" Listener).
This concept is known as "Listener Isolation", and it is an Extended feature
of Gateway API. Implementations that do not support Listener Isolation MUST
clearly document this, and MUST NOT claim support for the
`GatewayHTTPListenerIsolation` feature.
Implementations that _do_ support Listener Isolation SHOULD claim support
for the Extended `GatewayHTTPListenerIsolation` feature and pass the associated
conformance tests.
## Compatible Listeners
A Gateway's Listeners are considered _compatible_ if:
1. They are distinct.
2. The implementation can serve them in compliance with the Addresses
requirement that all Listeners are available on all assigned
addresses.
Compatible combinations in Extended support are expected to vary across
implementations. A combination that is compatible for one implementation
may not be compatible for another.
For example, an implementation that cannot serve both TCP and UDP listeners
on the same address, or cannot mix HTTPS and generic TLS listens on the same port
would not consider those cases compatible, even though they are distinct.
Implementations MAY merge separate Gateways onto a single set of
Addresses if all Listeners across all Gateways are compatible.
In a future release the MinItems=1 requirement MAY be dropped.
Support: Core
items:
description: |-
Listener embodies the concept of a logical endpoint where a Gateway accepts
network connections.
properties:
allowedRoutes:
default:
namespaces:
from: Same
description: |-
AllowedRoutes defines the types of routes that MAY be attached to a
Listener and the trusted namespaces where those Route resources MAY be
present.
Although a client request may match multiple route rules, only one rule
may ultimately receive the request. Matching precedence MUST be
determined in order of the following criteria:
* The most specific match as defined by the Route type.
* The oldest Route based on creation timestamp. For example, a Route with
a creation timestamp of "2020-09-08 01:02:03" is given precedence over
a Route with a creation timestamp of "2020-09-08 01:02:04".
* If everything else is equivalent, the Route appearing first in
alphabetical order (namespace/name) should be given precedence. For
example, foo/bar is given precedence over foo/baz.
All valid rules within a Route attached to this Listener should be
implemented. Invalid Route rules can be ignored (sometimes that will mean
the full Route). If a Route rule transitions from valid to invalid,
support for that Route rule should be dropped to ensure consistency. For
example, even if a filter specified by a Route rule is invalid, the rest
of the rules within that Route should still be supported.
Support: Core
properties:
kinds:
description: |-
Kinds specifies the groups and kinds of Routes that are allowed to bind
to this Gateway Listener. When unspecified or empty, the kinds of Routes
selected are determined using the Listener protocol.
A RouteGroupKind MUST correspond to kinds of Routes that are compatible
with the application protocol specified in the Listener's Protocol field.
If an implementation does not support or recognize this resource type, it
MUST set the "ResolvedRefs" condition to False for this Listener with the
"InvalidRouteKinds" reason.
Support: Core
items:
description: RouteGroupKind indicates the group and kind of a Route resource.
properties:
group:
default: gateway.networking.k8s.io
description: Group is the group of the Route.
maxLength: 253
pattern: ^$|^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
kind:
description: Kind is the kind of the Route.
maxLength: 63
minLength: 1
pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$
type: string
required:
- kind
type: object
maxItems: 8
type: array
x-kubernetes-list-type: atomic
namespaces:
default:
from: Same
description: |-
Namespaces indicates namespaces from which Routes may be attached to this
Listener. This is restricted to the namespace of this Gateway by default.
Support: Core
properties:
from:
default: Same
description: |-
From indicates where Routes will be selected for this Gateway. Possible
values are:
* All: Routes in all namespaces may be used by this Gateway.
* Selector: Routes in namespaces selected by the selector may be used by
this Gateway.
* Same: Only Routes in the same namespace may be used by this Gateway.
Support: Core
enum:
- All
- Selector
- Same
type: string
selector:
description: |-
Selector must be specified when From is set to "Selector". In that case,
only Routes in Namespaces matching this Selector will be selected by this
Gateway. This field is ignored for other values of "From".
Support: Core
properties:
matchExpressions:
description: matchExpressions is a list of label selector requirements. The requirements are ANDed.
items:
description: |-
A label selector requirement is a selector that contains values, a key, and an operator that
relates the key and values.
properties:
key:
description: key is the label key that the selector applies to.
type: string
operator:
description: |-
operator represents a key's relationship to a set of values.
Valid operators are In, NotIn, Exists and DoesNotExist.
type: string
values:
description: |-
values is an array of string values. If the operator is In or NotIn,
the values array must be non-empty. If the operator is Exists or DoesNotExist,
the values array must be empty. This array is replaced during a strategic
merge patch.
items:
type: string
type: array
x-kubernetes-list-type: atomic
required:
- key
- operator
type: object
type: array
x-kubernetes-list-type: atomic
matchLabels:
additionalProperties:
type: string
description: |-
matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels
map is equivalent to an element of matchExpressions, whose key field is "key", the
operator is "In", and the values array contains only "value". The requirements are ANDed.
type: object
type: object
x-kubernetes-map-type: atomic
type: object
type: object
hostname:
description: |-
Hostname specifies the virtual hostname to match for protocol types that
define this concept. When unspecified, all hostnames are matched. This
field is ignored for protocols that don't require hostname based
matching.
Implementations MUST apply Hostname matching appropriately for each of
the following protocols:
* TLS: The Listener Hostname MUST match the SNI.
* HTTP: The Listener Hostname MUST match the Host header of the request.
* HTTPS: The Listener Hostname SHOULD match both the SNI and Host header.
Note that this does not require the SNI and Host header to be the same.
The semantics of this are described in more detail below.
To ensure security, Section 11.1 of RFC-6066 emphasizes that server
implementations that rely on SNI hostname matching MUST also verify
hostnames within the application protocol.
Section 9.1.2 of RFC-7540 provides a mechanism for servers to reject the
reuse of a connection by responding with the HTTP 421 Misdirected Request
status code. This indicates that the origin server has rejected the
request because it appears to have been misdirected.
To detect misdirected requests, Gateways SHOULD match the authority of
the requests with all the SNI hostname(s) configured across all the
Gateway Listeners on the same port and protocol:
* If another Listener has an exact match or more specific wildcard entry,
the Gateway SHOULD return a 421.
* If the current Listener (selected by SNI matching during ClientHello)
does not match the Host:
* If another Listener does match the Host the Gateway SHOULD return a
421.
* If no other Listener matches the Host, the Gateway MUST return a
404.
For HTTPRoute and TLSRoute resources, there is an interaction with the
`spec.hostnames` array. When both listener and route specify hostnames,
there MUST be an intersection between the values for a Route to be
accepted. For more information, refer to the Route specific Hostnames
documentation.
Hostnames that are prefixed with a wildcard label (`*.`) are interpreted
as a suffix match. That means that a match for `*.example.com` would match
both `test.example.com`, and `foo.test.example.com`, but not `example.com`.
Support: Core
maxLength: 253
minLength: 1
pattern: ^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
name:
description: |-
Name is the name of the Listener. This name MUST be unique within a
Gateway.
Support: Core
maxLength: 253
minLength: 1
pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
port:
description: |-
Port is the network port. Multiple listeners may use the
same port, subject to the Listener compatibility rules.
Support: Core
format: int32
maximum: 65535
minimum: 1
type: integer
protocol:
description: |-
Protocol specifies the network protocol this listener expects to receive.
Support: Core
maxLength: 255
minLength: 1
pattern: ^[a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9])?$|[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*\/[A-Za-z0-9]+$
type: string
tls:
description: |-
TLS is the TLS configuration for the Listener. This field is required if
the Protocol field is "HTTPS" or "TLS". It is invalid to set this field
if the Protocol field is "HTTP", "TCP", or "UDP".
The association of SNIs to Certificate defined in ListenerTLSConfig is
defined based on the Hostname field for this listener.
The GatewayClass MUST use the longest matching SNI out of all
available certificates for any TLS handshake.
Support: Core
properties:
certificateRefs:
description: |-
CertificateRefs contains a series of references to Kubernetes objects that
contains TLS certificates and private keys. These certificates are used to
establish a TLS handshake for requests that match the hostname of the
associated listener.
A single CertificateRef to a Kubernetes Secret has "Core" support.
Implementations MAY choose to support attaching multiple certificates to
a Listener, but this behavior is implementation-specific.
References to a resource in different namespace are invalid UNLESS there
is a ReferenceGrant in the target namespace that allows the certificate
to be attached. If a ReferenceGrant does not allow this reference, the
"ResolvedRefs" condition MUST be set to False for this listener with the
"RefNotPermitted" reason.
This field is required to have at least one element when the mode is set
to "Terminate" (default) and is optional otherwise.
CertificateRefs can reference to standard Kubernetes resources, i.e.
Secret, or implementation-specific custom resources.
Support: Core - A single reference to a Kubernetes Secret of type kubernetes.io/tls
Support: Implementation-specific (More than one reference or other resource types)
items:
description: |-
SecretObjectReference identifies an API object including its namespace,
defaulting to Secret.
The API object must be valid in the cluster; the Group and Kind must
be registered in the cluster for this reference to be valid.
References to objects with invalid Group and Kind are not valid, and must
be rejected by the implementation, with appropriate Conditions set
on the containing object.
properties:
group:
default: ""
description: |-
Group is the group of the referent. For example, "gateway.networking.k8s.io".
When unspecified or empty string, core API group is inferred.
maxLength: 253
pattern: ^$|^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
kind:
default: Secret
description: Kind is kind of the referent. For example "Secret".
maxLength: 63
minLength: 1
pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$
type: string
name:
description: Name is the name of the referent.
maxLength: 253
minLength: 1
type: string
namespace:
description: |-
Namespace is the namespace of the referenced object. When unspecified, the local
namespace is inferred.
Note that when a namespace different than the local namespace is specified,
a ReferenceGrant object is required in the referent namespace to allow that
namespace's owner to accept the reference. See the ReferenceGrant
documentation for details.
Support: Core
maxLength: 63
minLength: 1
pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?$
type: string
required:
- name
type: object
maxItems: 64
type: array
x-kubernetes-list-type: atomic
mode:
default: Terminate
description: |-
Mode defines the TLS behavior for the TLS session initiated by the client.
There are two possible modes:
- Terminate: The TLS session between the downstream client and the
Gateway is terminated at the Gateway. This mode requires certificates
to be specified in some way, such as populating the certificateRefs
field.
- Passthrough: The TLS session is NOT terminated by the Gateway. This
implies that the Gateway can't decipher the TLS stream except for
the ClientHello message of the TLS protocol. The certificateRefs field
is ignored in this mode.
Support: Core
enum:
- Terminate
- Passthrough
type: string
options:
additionalProperties:
description: |-
AnnotationValue is the value of an annotation in Gateway API. This is used
for validation of maps such as TLS options. This roughly matches Kubernetes
annotation validation, although the length validation in that case is based
on the entire size of the annotations struct.
maxLength: 4096
minLength: 0
type: string
description: |-
Options are a list of key/value pairs to enable extended TLS
configuration for each implementation. For example, configuring the
minimum TLS version or supported cipher suites.
A set of common keys MAY be defined by the API in the future. To avoid
any ambiguity, implementation-specific definitions MUST use
domain-prefixed names, such as `example.com/my-custom-option`.
Un-prefixed names are reserved for key names defined by Gateway API.
Support: Implementation-specific
maxProperties: 16
type: object
type: object
x-kubernetes-validations:
- message: certificateRefs or options must be specified when mode is Terminate
rule: 'self.mode == ''Terminate'' ? size(self.certificateRefs) > 0 || size(self.options) > 0 : true'
required:
- name
- port
- protocol
type: object
maxItems: 64
minItems: 1
type: array
x-kubernetes-list-map-keys:
- name
x-kubernetes-list-type: map
x-kubernetes-validations:
- message: tls must not be specified for protocols ['HTTP', 'TCP', 'UDP']
rule: 'self.all(l, l.protocol in [''HTTP'', ''TCP'', ''UDP''] ? !has(l.tls) : true)'
- message: tls mode must be Terminate for protocol HTTPS
rule: 'self.all(l, (l.protocol == ''HTTPS'' && has(l.tls)) ? (l.tls.mode == '''' || l.tls.mode == ''Terminate'') : true)'
- message: hostname must not be specified for protocols ['TCP', 'UDP']
rule: 'self.all(l, l.protocol in [''TCP'', ''UDP''] ? (!has(l.hostname) || l.hostname == '''') : true)'
- message: Listener name must be unique within the Gateway
rule: self.all(l1, self.exists_one(l2, l1.name == l2.name))
- message: Combination of port, protocol and hostname must be unique for each listener
rule: 'self.all(l1, self.exists_one(l2, l1.port == l2.port && l1.protocol == l2.protocol && (has(l1.hostname) && has(l2.hostname) ? l1.hostname == l2.hostname : !has(l1.hostname) && !has(l2.hostname))))'
required:
- gatewayClassName
- listeners
type: object
status:
default:
conditions:
- lastTransitionTime: "1970-01-01T00:00:00Z"
message: Waiting for controller
reason: Pending
status: Unknown
type: Accepted
- lastTransitionTime: "1970-01-01T00:00:00Z"
message: Waiting for controller
reason: Pending
status: Unknown
type: Programmed
description: Status defines the current state of Gateway.
properties:
addresses:
description: |-
Addresses lists the network addresses that have been bound to the
Gateway.
This list may differ from the addresses provided in the spec under some
conditions:
* no addresses are specified, all addresses are dynamically assigned
* a combination of specified and dynamic addresses are assigned
* a specified address was unusable (e.g. already in use)
items:
description: GatewayStatusAddress describes a network address that is bound to a Gateway.
oneOf:
- properties:
type:
enum:
- IPAddress
value:
anyOf:
- format: ipv4
- format: ipv6
- properties:
type:
not:
enum:
- IPAddress
properties:
type:
default: IPAddress
description: Type of the address.
maxLength: 253
minLength: 1
pattern: ^Hostname|IPAddress|NamedAddress|[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*\/[A-Za-z0-9\/\-._~%!$&'()*+,;=:]+$
type: string
value:
description: |-
Value of the address. The validity of the values will depend
on the type and support by the controller.
Examples: `1.2.3.4`, `128::1`, `my-ip-address`.
maxLength: 253
minLength: 1
type: string
required:
- value
type: object
x-kubernetes-validations:
- message: Hostname value must only contain valid characters (matching ^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$)
rule: 'self.type == ''Hostname'' ? self.value.matches(r"""^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$"""): true'
maxItems: 16
type: array
x-kubernetes-list-type: atomic
conditions:
default:
- lastTransitionTime: "1970-01-01T00:00:00Z"
message: Waiting for controller
reason: Pending
status: Unknown
type: Accepted
- lastTransitionTime: "1970-01-01T00:00:00Z"
message: Waiting for controller
reason: Pending
status: Unknown
type: Programmed
description: |-
Conditions describe the current conditions of the Gateway.
Implementations should prefer to express Gateway conditions
using the `GatewayConditionType` and `GatewayConditionReason`
constants so that operators and tools can converge on a common
vocabulary to describe Gateway state.
Known condition types are:
* "Accepted"
* "Programmed"
* "Ready"
items:
description: Condition contains details for one aspect of the current state of this API Resource.
properties:
lastTransitionTime:
description: |-
lastTransitionTime is the last time the condition transitioned from one status to another.
This should be when the underlying condition changed. If that is not known, then using the time when the API field changed is acceptable.
format: date-time
type: string
message:
description: |-
message is a human readable message indicating details about the transition.
This may be an empty string.
maxLength: 32768
type: string
observedGeneration:
description: |-
observedGeneration represents the .metadata.generation that the condition was set based upon.
For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date
with respect to the current state of the instance.
format: int64
minimum: 0
type: integer
reason:
description: |-
reason contains a programmatic identifier indicating the reason for the condition's last transition.
Producers of specific condition types may define expected values and meanings for this field,
and whether the values are considered a guaranteed API.
The value should be a CamelCase string.
This field may not be empty.
maxLength: 1024
minLength: 1
pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
type: string
status:
description: status of the condition, one of True, False, Unknown.
enum:
- "True"
- "False"
- Unknown
type: string
type:
description: type of condition in CamelCase or in foo.example.com/CamelCase.
maxLength: 316
pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
type: string
required:
- lastTransitionTime
- message
- reason
- status
- type
type: object
maxItems: 8
type: array
x-kubernetes-list-map-keys:
- type
x-kubernetes-list-type: map
listeners:
description: Listeners provide status for each unique listener port defined in the Spec.
items:
description: ListenerStatus is the status associated with a Listener.
properties:
attachedRoutes:
description: |-
AttachedRoutes represents the total number of Routes that have been
successfully attached to this Listener.
Successful attachment of a Route to a Listener is based solely on the
combination of the AllowedRoutes field on the corresponding Listener
and the Route's ParentRefs field. A Route is successfully attached to
a Listener when it is selected by the Listener's AllowedRoutes field
AND the Route has a valid ParentRef selecting the whole Gateway
resource or a specific Listener as a parent resource (more detail on
attachment semantics can be found in the documentation on the various
Route kinds ParentRefs fields). Listener or Route status does not impact
successful attachment, i.e. the AttachedRoutes field count MUST be set
for Listeners with condition Accepted: false and MUST count successfully
attached Routes that may themselves have Accepted: false conditions.
Uses for this field include troubleshooting Route attachment and
measuring blast radius/impact of changes to a Listener.
format: int32
type: integer
conditions:
description: Conditions describe the current condition of this listener.
items:
description: Condition contains details for one aspect of the current state of this API Resource.
properties:
lastTransitionTime:
description: |-
lastTransitionTime is the last time the condition transitioned from one status to another.
This should be when the underlying condition changed. If that is not known, then using the time when the API field changed is acceptable.
format: date-time
type: string
message:
description: |-
message is a human readable message indicating details about the transition.
This may be an empty string.
maxLength: 32768
type: string
observedGeneration:
description: |-
observedGeneration represents the .metadata.generation that the condition was set based upon.
For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date
with respect to the current state of the instance.
format: int64
minimum: 0
type: integer
reason:
description: |-
reason contains a programmatic identifier indicating the reason for the condition's last transition.
Producers of specific condition types may define expected values and meanings for this field,
and whether the values are considered a guaranteed API.
The value should be a CamelCase string.
This field may not be empty.
maxLength: 1024
minLength: 1
pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
type: string
status:
description: status of the condition, one of True, False, Unknown.
enum:
- "True"
- "False"
- Unknown
type: string
type:
description: type of condition in CamelCase or in foo.example.com/CamelCase.
maxLength: 316
pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
type: string
required:
- lastTransitionTime
- message
- reason
- status
- type
type: object
maxItems: 8
type: array
x-kubernetes-list-map-keys:
- type
x-kubernetes-list-type: map
name:
description: Name is the name of the Listener that this status corresponds to.
maxLength: 253
minLength: 1
pattern: ^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
supportedKinds:
description: |-
SupportedKinds is the list indicating the Kinds supported by this
listener. This MUST represent the kinds an implementation supports for
that Listener configuration.
If kinds are specified in Spec that are not supported, they MUST NOT
appear in this list and an implementation MUST set the "ResolvedRefs"
condition to "False" with the "InvalidRouteKinds" reason. If both valid
and invalid Route kinds are specified, the implementation MUST
reference the valid Route kinds that have been specified.
items:
description: RouteGroupKind indicates the group and kind of a Route resource.
properties:
group:
default: gateway.networking.k8s.io
description: Group is the group of the Route.
maxLength: 253
pattern: ^$|^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
type: string
kind:
description: Kind is the kind of the Route.
maxLength: 63
minLength: 1
pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$
type: string
required:
- kind
type: object
maxItems: 8
type: array
x-kubernetes-list-type: atomic
required:
- attachedRoutes
- conditions
- name
- supportedKinds
type: object
maxItems: 64
type: array
x-kubernetes-list-map-keys:
- name
x-kubernetes-list-type: map
type: object
required:
- spec
type: object
served: true
storage: false
subresources:
status: {}
status:
acceptedNames:
kind: ""
plural: ""
conditions: null
storedVersions: null
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