Ta-Ching ChenandGitHub
93d4b88d84
Before this PR, CLI functions fatal out when encountering error instead of returning it. Such behavior makes it hard to reuse the functions nor writing unit tests. This PR aims to make functions return errors instead of error out.
126 lines
3.2 KiB
Go
126 lines
3.2 KiB
Go
/*
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Copyright 2019 The Fission 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 kubewatch
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import (
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"fmt"
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"github.com/pkg/errors"
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uuid "github.com/satori/go.uuid"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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fv1 "github.com/fission/fission/pkg/apis/fission.io/v1"
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"github.com/fission/fission/pkg/controller/client"
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"github.com/fission/fission/pkg/fission-cli/cliwrapper/cli"
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"github.com/fission/fission/pkg/fission-cli/cmd/spec"
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"github.com/fission/fission/pkg/fission-cli/util"
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)
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type CreateSubCommand struct {
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client *client.Client
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watcher *fv1.KubernetesWatchTrigger
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}
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func Create(flags cli.Input) error {
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c, err := util.GetServer(flags)
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if err != nil {
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return err
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}
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opts := CreateSubCommand{
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client: c,
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}
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return opts.do(flags)
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}
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func (opts *CreateSubCommand) do(flags cli.Input) error {
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err := opts.complete(flags)
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if err != nil {
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return err
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}
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return opts.run(flags)
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}
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func (opts *CreateSubCommand) complete(flags cli.Input) error {
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fnName := flags.String("function")
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if len(fnName) == 0 {
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return errors.New("Need a function name to create a watch, use --function")
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}
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fnNamespace := flags.String("fnNamespace")
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namespace := flags.String("ns")
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if len(namespace) == 0 {
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fmt.Println("Watch 'default' namespace. Use --ns <namespace> to override.")
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namespace = "default"
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}
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objType := flags.String("type")
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if len(objType) == 0 {
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fmt.Println("Object type unspecified, will watch pods. Use --type <type> to override.")
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objType = "pod"
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}
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labels := flags.String("labels")
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// empty 'labels' selects everything
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if len(labels) == 0 {
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fmt.Printf("Watching all objects of type '%v', use --labels to refine selection.\n", objType)
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} else {
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// TODO
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fmt.Printf("Label selector not implemented, watching all objects")
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}
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// automatically name watches
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watchName := uuid.NewV4().String()
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opts.watcher = &fv1.KubernetesWatchTrigger{
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Metadata: metav1.ObjectMeta{
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Name: watchName,
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Namespace: fnNamespace,
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},
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Spec: fv1.KubernetesWatchTriggerSpec{
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Namespace: namespace,
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Type: objType,
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//LabelSelector: labels,
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FunctionReference: fv1.FunctionReference{
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Name: fnName,
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Type: fv1.FunctionReferenceTypeFunctionName,
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},
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},
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}
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return nil
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}
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func (opts *CreateSubCommand) run(flags cli.Input) error {
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// if we're writing a spec, don't call the API
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if flags.Bool("spec") {
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specFile := fmt.Sprintf("kubewatch-%v.yaml", opts.watcher.Metadata.Name)
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err := spec.SpecSave(*opts.watcher, specFile)
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if err != nil {
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return errors.Wrap(err, "error creating kubewatch spec")
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}
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return nil
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}
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_, err := opts.client.WatchCreate(opts.watcher)
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if err != nil {
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return errors.Wrap(err, "error creating kubewatch")
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}
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fmt.Printf("kubewatch '%v' created\n", opts.watcher.Metadata.Name)
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return nil
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}
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