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controller.go
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controller.go
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// Copyright 2018 The Operator-SDK 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 add
import (
"fmt"
"github.com/operator-framework/operator-sdk/internal/pkg/scaffold"
"github.com/operator-framework/operator-sdk/internal/pkg/scaffold/input"
"github.com/operator-framework/operator-sdk/internal/util/projutil"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
func newAddControllerCmd() *cobra.Command {
controllerCmd := &cobra.Command{
Use: "controller",
Short: "Adds a new controller pkg",
Long: `operator-sdk add controller --kind=<kind> --api-version=<group/version> creates a new
controller pkg under pkg/controller/<kind> that, by default, reconciles on a custom resource for the specified apiversion and kind.
The controller will expect to use the custom resource type that should already be defined under pkg/apis/<group>/<version>
via the "operator-sdk add api --kind=<kind> --api-version=<group/version>" command.
This command must be run from the project root directory.
If the controller pkg for that Kind already exists at pkg/controller/<kind> then the command will not overwrite and return an error.
Example:
$ operator-sdk add controller --api-version=app.example.com/v1alpha1 --kind=AppService
$ tree pkg/controller
pkg/controller/
├── add_appservice.go
├── appservice
│ └── appservice_controller.go
└── controller.go
`,
RunE: controllerRun,
}
controllerCmd.Flags().StringVar(&apiVersion, "api-version", "", "Kubernetes APIVersion that has a format of $GROUP_NAME/$VERSION (e.g app.example.com/v1alpha1)")
if err := controllerCmd.MarkFlagRequired("api-version"); err != nil {
log.Fatalf("Failed to mark `api-version` flag for `add controller` subcommand as required")
}
controllerCmd.Flags().StringVar(&kind, "kind", "", "Kubernetes resource Kind name. (e.g AppService)")
if err := controllerCmd.MarkFlagRequired("kind"); err != nil {
log.Fatalf("Failed to mark `kind` flag for `add controller` subcommand as required")
}
return controllerCmd
}
func controllerRun(cmd *cobra.Command, args []string) error {
projutil.MustInProjectRoot()
// Only Go projects can add controllers.
if err := projutil.CheckGoProjectCmd(cmd); err != nil {
return err
}
log.Infof("Generating controller version %s for kind %s.", apiVersion, kind)
// Create and validate new resource
r, err := scaffold.NewResource(apiVersion, kind)
if err != nil {
return err
}
cfg := &input.Config{
Repo: projutil.CheckAndGetProjectGoPkg(),
AbsProjectPath: projutil.MustGetwd(),
}
s := &scaffold.Scaffold{}
err = s.Execute(cfg,
&scaffold.ControllerKind{Resource: r},
&scaffold.AddController{Resource: r},
)
if err != nil {
return fmt.Errorf("controller scaffold failed: (%v)", err)
}
log.Info("Controller generation complete.")
return nil
}