Merge pull request #1157 from aiordache/kube_backend

Add Kubernetes backend

Author: gtardif

Makefile

@@ -39,7 +39,7 @@ protos: ## Generate go code from .proto files
 cli: ## Compile the cli
 	@docker build . --target cli \
 	--platform local \
-	--build-arg BUILD_TAGS=e2e \
+	--build-arg BUILD_TAGS=e2e,kube \
 	--build-arg GIT_TAG=$(GIT_TAG) \
 	--output ./bin
 

api/context/store/contextmetadata.go

@@ -55,6 +55,12 @@ type EcsContext struct {
 	Profile            string `json:",omitempty"`
 }
 
+// KubeContext is the context for a kube backend
+type KubeContext struct {
+	Endpoint        string `json:",omitempty"`
+	FromEnvironment bool
+}
+
 // AwsContext is the context for the ecs plugin
 type AwsContext EcsContext
 

api/context/store/store.go

@@ -55,6 +55,9 @@ const (
 	// LocalContextType is the endpoint key in the context endpoints for a new
 	// local backend
 	LocalContextType = "local"
+	// KubeContextType is the endpoint key in the context endpoints for a new
+	// kube backend
+	KubeContextType = "kubernetes"
 )
 
 const (
@@ -328,5 +331,8 @@ func getters() map[string]func() interface{} {
 		LocalContextType: func() interface{} {
 			return &LocalContext{}
 		},
+		KubeContextType: func() interface{} {
+			return &KubeContext{}
+		},
 	}
 }

cli/cmd/context/create_kube.go

@@ -0,0 +1,80 @@
+// +build kube
+
+/*
+   Copyright 2020 Docker Compose CLI 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 context
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+
+	"github.com/docker/compose-cli/api/context/store"
+	"github.com/docker/compose-cli/api/errdefs"
+	"github.com/docker/compose-cli/kube"
+)
+
+func init() {
+	extraCommands = append(extraCommands, createKubeCommand)
+	extraHelp = append(extraHelp, `
+Create a Kubernetes context:
+$ docker context create kubernetes CONTEXT [flags]
+(see docker context create kubernetes --help)
+`)
+}
+
+func createKubeCommand() *cobra.Command {
+	var opts kube.ContextParams
+	cmd := &cobra.Command{
+		Use:   "kubernetes CONTEXT [flags]",
+		Short: "Create context for a Kubernetes Cluster",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			opts.Name = args[0]
+
+			if opts.Endpoint != "" {
+				opts.FromEnvironment = false
+			}
+			return runCreateKube(cmd.Context(), args[0], opts)
+		},
+	}
+
+	addDescriptionFlag(cmd, &opts.Description)
+	cmd.Flags().StringVar(&opts.Endpoint, "endpoint", "", "The endpoint of the Kubernetes manager")
+	cmd.Flags().BoolVar(&opts.FromEnvironment, "from-env", true, "Get endpoint and creds from env vars")
+	return cmd
+}
+
+func runCreateKube(ctx context.Context, contextName string, opts kube.ContextParams) error {
+	if contextExists(ctx, contextName) {
+		return errors.Wrapf(errdefs.ErrAlreadyExists, "context %q", contextName)
+	}
+
+	contextData, description, err := createContextData(ctx, opts)
+	if err != nil {
+		return err
+	}
+	return createDockerContext(ctx, contextName, store.KubeContextType, description, contextData)
+}
+
+func createContextData(ctx context.Context, opts kube.ContextParams) (interface{}, string, error) {
+	return store.KubeContext{
+		Endpoint:        opts.Endpoint,
+		FromEnvironment: opts.FromEnvironment,
+	}, opts.Description, nil
+}

go.mod

@@ -39,14 +39,12 @@ require (
 	github.com/joho/godotenv v1.3.0
 	github.com/labstack/echo v3.3.10+incompatible
 	github.com/labstack/gommon v0.3.0 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
 	github.com/moby/buildkit v0.8.1-0.20201205083753-0af7b1b9c693
 	github.com/moby/term v0.0.0-20201110203204-bea5bbe245bf
 	github.com/morikuni/aec v1.0.0
 	github.com/opencontainers/go-digest v1.0.0
 	github.com/opencontainers/image-spec v1.0.1
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/procfs v0.2.0 // indirect
 	github.com/prometheus/tsdb v0.10.0
 	github.com/sanathkr/go-yaml v0.0.0-20170819195128-ed9d249f429b
 	github.com/sirupsen/logrus v1.7.0
@@ -57,13 +55,15 @@ require (
 	golang.org/x/net v0.0.0-20201110031124-69a78807bb2b
 	golang.org/x/oauth2 v0.0.0-20201109201403-9fd604954f58
 	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
-	google.golang.org/genproto v0.0.0-20201110150050-8816d57aaa9a // indirect
 	google.golang.org/grpc v1.33.2
 	google.golang.org/protobuf v1.25.0
 	gopkg.in/ini.v1 v1.62.0
+	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c
 	gotest.tools v2.2.0+incompatible
 	gotest.tools/v3 v3.0.3
-	k8s.io/client-go v0.20.1 // indirect
+	helm.sh/helm/v3 v3.5.0
+	k8s.io/api v0.20.1
+	k8s.io/apimachinery v0.20.1
 	sigs.k8s.io/kustomize/kyaml v0.10.5
 )