mirror of
https://github.com/k3s-io/kubernetes.git
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typed client: add tags and script for code generation
This commit is contained in:
Nikhita Raghunath
parent
1e3918e4b1
commit
355279c866
@ -454,9 +454,14 @@ staging/src/k8s.io/api/scheduling/v1alpha1
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staging/src/k8s.io/api/settings/v1alpha1
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staging/src/k8s.io/api/storage/v1
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staging/src/k8s.io/api/storage/v1beta1
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/apis/cr/v1
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/client
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/controller
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/pkg/apis/cr
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/pkg/apis/cr/v1
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/pkg/client/clientset/versioned
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/pkg/client/clientset/versioned/fake
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/pkg/client/clientset/versioned/scheme
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/pkg/client/clientset/versioned/typed/cr/v1
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/pkg/client/clientset/versioned/typed/cr/v1/fake
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staging/src/k8s.io/apiextensions-apiserver/examples/client-go/pkg/client/informers/externalversions/internalinterfaces
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staging/src/k8s.io/apiextensions-apiserver/pkg/apis/apiextensions
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staging/src/k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1
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staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver
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@ -2,18 +2,29 @@
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**Note:** CustomResourceDefinition is the successor of the deprecated ThirdPartyResource.
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This particular example demonstrates how to perform basic operations such as:
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This particular example demonstrates how to generate a client for CustomResources using [`k8s.io/code-generator`](https://github.com/kubernetes/code-generator). The clientset can
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be generated using the `./hack/update-codegen.sh` script.
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* How to register a new custom resource (custom resource type) using a CustomResourceDefinition
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* How to create/get/list instances of your new resource type (update/delete/etc work as well but are not demonstrated)
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* How to setup a controller on resource handling create/update/delete events
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The `update-codegen` script will automatically generate the following files and
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directories:
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## Running
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* `pkg/apis/cr/v1/zz_generated.deepcopy.go`
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* `pkg/client/`
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```
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# assumes you have a working kubeconfig, not required if operating in-cluster
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go run *.go -kubeconfig=$HOME/.kube/config
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```
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The following code-generators are used:
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* `deepcopy-gen` - creates a method `func (t* T) DeepCopy() *T` for each type T
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* `client-gen` - creates typed clientsets for CustomResource APIGroups
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* `informer-gen` - creates informers for CustomResources which offer an event based
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interface to react on changes of CustomResources on the server
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* `lister-gen` - creates listers for CustomResources which offer a read-only caching layer for GET and LIST requests.
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Changes should not be made to these files manually, and when creating your own
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controller based off of this implementation you should not copy these files and
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instead run the `update-codegen` script to generate your own.
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Please see [`k8s.io/sample-controller`](https://github.com/kubernetes/sample-controller) for an example
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controller for CustomResources using the generated client.
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## Use Cases
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@ -44,9 +55,3 @@ type User struct {
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Password string `json:"password"`
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}
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```
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## Cleanup
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Successfully running this program will clean the created artifacts. If you terminate the program without completing, you can clean up the created CustomResourceDefinition with:
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kubectl delete crd examples.cr.client-go.k8s.io
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@ -0,0 +1,34 @@
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#!/bin/bash
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# Copyright 2017 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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set -o errexit
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set -o nounset
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set -o pipefail
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SCRIPT_ROOT=$(dirname ${BASH_SOURCE})/..
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CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${SCRIPT_ROOT}; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
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# generate the code with:
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# --output-base because this script should also be able to run inside the vendor dir of
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# k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
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# instead of the $GOPATH directly. For normal projects this can be dropped.
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${CODEGEN_PKG}/generate-groups.sh all \
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k8s.io/apiextensions-apiserver/examples/client-go/pkg/client k8s.io/apiextensions-apiserver/examples/client-go/pkg/apis \
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cr:v1 \
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--output-base "$(dirname ${BASH_SOURCE})/../../../../.."
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# To use your own boilerplate text append:
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# --go-header-file ${SCRIPT_ROOT}/hack/custom-boilerplate.go.txt
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@ -0,0 +1,48 @@
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#!/bin/bash
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# Copyright 2017 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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set -o errexit
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set -o nounset
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set -o pipefail
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SCRIPT_ROOT=$(dirname "${BASH_SOURCE}")/..
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DIFFROOT="${SCRIPT_ROOT}/pkg"
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TMP_DIFFROOT="${SCRIPT_ROOT}/_tmp/pkg"
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_tmp="${SCRIPT_ROOT}/_tmp"
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cleanup() {
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rm -rf "${_tmp}"
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}
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trap "cleanup" EXIT SIGINT
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cleanup
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mkdir -p "${TMP_DIFFROOT}"
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cp -a "${DIFFROOT}"/* "${TMP_DIFFROOT}"
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"${SCRIPT_ROOT}/hack/update-codegen.sh"
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echo "diffing ${DIFFROOT} against freshly generated codegen"
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ret=0
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diff -Naupr "${DIFFROOT}" "${TMP_DIFFROOT}" || ret=$?
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cp -a "${TMP_DIFFROOT}"/* "${DIFFROOT}"
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if [[ $ret -eq 0 ]]
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then
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echo "${DIFFROOT} up to date."
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else
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echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
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exit 1
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fi
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@ -0,0 +1,25 @@
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load("@io_bazel_rules_go//go:def.bzl", "go_library")
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go_library(
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name = "go_default_library",
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srcs = ["register.go"],
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importpath = "k8s.io/apiextensions-apiserver/examples/client-go/pkg/apis/cr",
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visibility = ["//visibility:public"],
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)
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filegroup(
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name = "package-srcs",
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srcs = glob(["**"]),
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tags = ["automanaged"],
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visibility = ["//visibility:private"],
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)
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filegroup(
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name = "all-srcs",
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srcs = [
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":package-srcs",
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"//staging/src/k8s.io/apiextensions-apiserver/examples/client-go/pkg/apis/cr/v1:all-srcs",
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],
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tags = ["automanaged"],
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visibility = ["//visibility:public"],
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)
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@ -0,0 +1,21 @@
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/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cr
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const (
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GroupName = "cr.example.apiextensions.k8s.io"
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)
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@ -0,0 +1,54 @@
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package(default_visibility = ["//visibility:public"])
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load(
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"@io_bazel_rules_go//go:def.bzl",
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"go_library",
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"go_test",
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)
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go_test(
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name = "go_default_test",
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srcs = ["roundtrip_test.go"],
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importpath = "k8s.io/apiextensions-apiserver/examples/client-go/pkg/apis/cr/v1",
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library = ":go_default_library",
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deps = [
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"//vendor/github.com/google/gofuzz:go_default_library",
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"//vendor/k8s.io/apimachinery/pkg/api/testing/fuzzer:go_default_library",
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"//vendor/k8s.io/apimachinery/pkg/api/testing/roundtrip:go_default_library",
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"//vendor/k8s.io/apimachinery/pkg/apis/meta/fuzzer:go_default_library",
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"//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
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"//vendor/k8s.io/apimachinery/pkg/runtime:go_default_library",
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"//vendor/k8s.io/apimachinery/pkg/runtime/serializer:go_default_library",
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],
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)
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go_library(
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name = "go_default_library",
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srcs = [
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"doc.go",
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"register.go",
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"types.go",
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"zz_generated.deepcopy.go",
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],
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importpath = "k8s.io/apiextensions-apiserver/examples/client-go/pkg/apis/cr/v1",
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deps = [
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"//vendor/k8s.io/apiextensions-apiserver/examples/client-go/pkg/apis/cr:go_default_library",
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"//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
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"//vendor/k8s.io/apimachinery/pkg/conversion:go_default_library",
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"//vendor/k8s.io/apimachinery/pkg/runtime:go_default_library",
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"//vendor/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
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],
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)
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filegroup(
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name = "package-srcs",
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srcs = glob(["**"]),
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tags = ["automanaged"],
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visibility = ["//visibility:private"],
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)
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filegroup(
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name = "all-srcs",
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srcs = [":package-srcs"],
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tags = ["automanaged"],
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)
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@ -0,0 +1,21 @@
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/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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|
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http://www.apache.org/licenses/LICENSE-2.0
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|
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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See the License for the specific language governing permissions and
|
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limitations under the License.
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*/
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// +k8s:deepcopy-gen=package,register
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// Package v1 is the v1 version of the API.
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// +groupName=cr.example.apiextensions.k8s.io
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package v1
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@ -0,0 +1,51 @@
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/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
|
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You may obtain a copy of the License at
|
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|
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http://www.apache.org/licenses/LICENSE-2.0
|
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|
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Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
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*/
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package v1
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import (
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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cr "k8s.io/apiextensions-apiserver/examples/client-go/pkg/apis/cr"
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)
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// SchemeGroupVersion is group version used to register these objects
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var SchemeGroupVersion = schema.GroupVersion{Group: cr.GroupName, Version: "v1"}
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// Kind takes an unqualified kind and returns back a Group qualified GroupKind
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func Kind(kind string) schema.GroupKind {
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return SchemeGroupVersion.WithKind(kind).GroupKind()
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}
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// Resource takes an unqualified resource and returns a Group qualified GroupResource
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func Resource(resource string) schema.GroupResource {
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return SchemeGroupVersion.WithResource(resource).GroupResource()
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}
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var (
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SchemeBuilder = runtime.NewSchemeBuilder(addKnownTypes)
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AddToScheme = SchemeBuilder.AddToScheme
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)
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// Adds the list of known types to Scheme.
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func addKnownTypes(scheme *runtime.Scheme) error {
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scheme.AddKnownTypes(SchemeGroupVersion,
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&Example{},
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&ExampleList{},
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)
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return nil
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}
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@ -0,0 +1,63 @@
|
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/*
|
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Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
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package v1
|
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|
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import (
|
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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|
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// +genclient
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// +genclient:noStatus
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// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
|
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|
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// Example is a specification for an Example resource
|
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type Example struct {
|
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metav1.TypeMeta `json:",inline"`
|
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metav1.ObjectMeta `json:"metadata"`
|
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|
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Spec ExampleSpec `json:"spec"`
|
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Status ExampleStatus `json:"status,omitempty"`
|
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}
|
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|
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// ExampleSpec is the spec for an Example resource
|
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type ExampleSpec struct {
|
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Foo string `json:"foo"`
|
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Bar bool `json:"bar"`
|
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}
|
||||
|
||||
// ExampleStatus is the status for an Example resource
|
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type ExampleStatus struct {
|
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State ExampleState `json:"state,omitempty"`
|
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Message string `json:"message,omitempty"`
|
||||
}
|
||||
|
||||
type ExampleState string
|
||||
|
||||
const (
|
||||
ExampleStateCreated ExampleState = "Created"
|
||||
ExampleStateProcessed ExampleState = "Processed"
|
||||
)
|
||||
|
||||
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
|
||||
|
||||
// ExampleList is a list of Example resources
|
||||
type ExampleList struct {
|
||||
metav1.TypeMeta `json:",inline"`
|
||||
metav1.ListMeta `json:"metadata"`
|
||||
|
||||
Items []Example `json:"items"`
|
||||
}
|
||||
@ -1,96 +0,0 @@
|
||||
/*
|
||||
Copyright 2017 The Kubernetes Authors.
|
||||
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
http://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package integration
|
||||
|
||||
import (
|
||||
"context"
|
||||
"testing"
|
||||
|
||||
apiv1 "k8s.io/api/core/v1"
|
||||
"k8s.io/apiextensions-apiserver/test/integration/testserver"
|
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
||||
|
||||
examplecrv1 "k8s.io/apiextensions-apiserver/examples/client-go/apis/cr/v1"
|
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exampleclient "k8s.io/apiextensions-apiserver/examples/client-go/client"
|
||||
examplecontroller "k8s.io/apiextensions-apiserver/examples/client-go/controller"
|
||||
)
|
||||
|
||||
func TestClientGoCustomResourceExample(t *testing.T) {
|
||||
t.Logf("Creating apiextensions apiserver")
|
||||
config, err := testserver.DefaultServerConfig()
|
||||
if err != nil {
|
||||
t.Fatalf("unexpected error: %v", err)
|
||||
}
|
||||
stopCh, apiExtensionClient, _, err := testserver.StartServer(config)
|
||||
if err != nil {
|
||||
t.Fatalf("unexpected error: %v", err)
|
||||
}
|
||||
defer close(stopCh)
|
||||
|
||||
t.Logf("Creating CustomResourceDefinition")
|
||||
crd, err := exampleclient.CreateCustomResourceDefinition(apiExtensionClient)
|
||||
if err != nil {
|
||||
t.Fatalf("unexpected error creating the CustomResourceDefinition: %v", err)
|
||||
}
|
||||
defer apiExtensionClient.ApiextensionsV1beta1().CustomResourceDefinitions().Delete(crd.Name, nil)
|
||||
|
||||
exampleClient, exampleScheme, err := exampleclient.NewClient(config.GenericConfig.LoopbackClientConfig)
|
||||
if err != nil {
|
||||
t.Fatalf("unexpected error: %v", err)
|
||||
}
|
||||
|
||||
t.Logf("Starting a controller on instances of custom resource %q", examplecrv1.ExampleResourcePlural)
|
||||
controller := examplecontroller.ExampleController{
|
||||
ExampleClient: exampleClient,
|
||||
ExampleScheme: exampleScheme,
|
||||
}
|
||||
|
||||
ctx, cancelFunc := context.WithCancel(context.Background())
|
||||
defer cancelFunc()
|
||||
go controller.Run(ctx)
|
||||
|
||||
// Create an instance of our custom resource
|
||||
t.Logf("Creating custom resource instance")
|
||||
example := &examplecrv1.Example{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "example1",
|
||||
},
|
||||
Spec: examplecrv1.ExampleSpec{
|
||||
Foo: "hello",
|
||||
Bar: true,
|
||||
},
|
||||
Status: examplecrv1.ExampleStatus{
|
||||
State: examplecrv1.ExampleStateCreated,
|
||||
Message: "Created, not processed yet",
|
||||
},
|
||||
}
|
||||
var result examplecrv1.Example
|
||||
err = exampleClient.Post().
|
||||
Resource(examplecrv1.ExampleResourcePlural).
|
||||
Namespace(apiv1.NamespaceDefault).
|
||||
Body(example).
|
||||
Do().Into(&result)
|
||||
if err != nil {
|
||||
t.Fatalf("Failed to create an instance of the custom resource: %v", err)
|
||||
}
|
||||
|
||||
t.Logf("Waiting instance to be processed by the controller")
|
||||
if err := exampleclient.WaitForExampleInstanceProcessed(exampleClient, "example1"); err != nil {
|
||||
t.Fatalf("Instance was not processed correctly: %v", err)
|
||||
}
|
||||
t.Logf("Instance is processed")
|
||||
}
|
||||
@ -17,7 +17,6 @@ limitations under the License.
|
||||
package v1alpha1
|
||||
|
||||
import (
|
||||
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
||||
"k8s.io/apimachinery/pkg/runtime"
|
||||
"k8s.io/apimachinery/pkg/runtime/schema"
|
||||
|
||||
@ -27,31 +26,26 @@ import (
|
||||
// SchemeGroupVersion is group version used to register these objects
|
||||
var SchemeGroupVersion = schema.GroupVersion{Group: samplecontroller.GroupName, Version: "v1alpha1"}
|
||||
|
||||
// Kind takes an unqualified kind and returns back a Group qualified GroupKind
|
||||
func Kind(kind string) schema.GroupKind {
|
||||
return SchemeGroupVersion.WithKind(kind).GroupKind()
|
||||
}
|
||||
|
||||
// Resource takes an unqualified resource and returns a Group qualified GroupResource
|
||||
func Resource(resource string) schema.GroupResource {
|
||||
return SchemeGroupVersion.WithResource(resource).GroupResource()
|
||||
}
|
||||
|
||||
var (
|
||||
// localSchemeBuilder and AddToScheme will stay in k8s.io/kubernetes.
|
||||
SchemeBuilder runtime.SchemeBuilder
|
||||
localSchemeBuilder = &SchemeBuilder
|
||||
AddToScheme = localSchemeBuilder.AddToScheme
|
||||
SchemeBuilder = runtime.NewSchemeBuilder(addKnownTypes)
|
||||
AddToScheme = SchemeBuilder.AddToScheme
|
||||
)
|
||||
|
||||
func init() {
|
||||
// We only register manually written functions here. The registration of the
|
||||
// generated functions takes place in the generated files. The separation
|
||||
// makes the code compile even when the generated files are missing.
|
||||
localSchemeBuilder.Register(addKnownTypes)
|
||||
}
|
||||
|
||||
// Adds the list of known types to api.Scheme.
|
||||
// Adds the list of known types to Scheme.
|
||||
func addKnownTypes(scheme *runtime.Scheme) error {
|
||||
scheme.AddKnownTypes(SchemeGroupVersion,
|
||||
&Foo{},
|
||||
&FooList{},
|
||||
)
|
||||
metav1.AddToGroupVersion(scheme, SchemeGroupVersion)
|
||||
return nil
|
||||
}
|
||||
|
||||
@ -23,7 +23,6 @@ import (
|
||||
// +genclient
|
||||
// +genclient:noStatus
|
||||
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
|
||||
// +resource:path=foo
|
||||
|
||||
// Foo is a specification for a Foo resource
|
||||
type Foo struct {
|
||||
@ -46,7 +45,6 @@ type FooStatus struct {
|
||||
}
|
||||
|
||||
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
|
||||
// +resource:path=foos
|
||||
|
||||
// FooList is a list of Foo resources
|
||||
type FooList struct {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user