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nodeselector.go
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nodeselector.go
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// Copyright 2022 The Knative 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 remove
import (
"fmt"
"strings"
"github.com/spf13/cobra"
_ "k8s.io/client-go/plugin/pkg/client/auth/oidc" // from https://github.com/kubernetes/client-go/issues/345
"k8s.io/client-go/util/retry"
"knative.dev/kn-plugin-operator/pkg"
"knative.dev/kn-plugin-operator/pkg/command/common"
"knative.dev/operator/pkg/apis/operator/base"
)
var nodeSelectorFlags common.KeyValueFlags
// removeNodeSelectorCommand represents the configure commands to delete the node selector for Knative deployments
func removeNodeSelectorCommand(p *pkg.OperatorParams) *cobra.Command {
var removeNodeSelectorsCmd = &cobra.Command{
Use: "nodeSelectors",
Short: "Remove the node selectors for Knative Serving and Eventing deployments",
Example: `
# Remove the node selectors for Knative Serving and Eventing deployments
kn operation remove nodeSelectors --component eventing --deployName eventing-controller --key key --namespace knative-eventing`,
RunE: func(cmd *cobra.Command, args []string) error {
if err := validateNodeSelectorFlags(nodeSelectorFlags); err != nil {
return err
}
err := deleteNodeSelectors(nodeSelectorFlags, p)
if err != nil {
return err
}
fmt.Fprintf(cmd.OutOrStdout(), "The specified node selector has been deleted in the namespace '%s'.\n",
nodeSelectorFlags.Namespace)
return nil
},
}
removeNodeSelectorsCmd.Flags().StringVar(&nodeSelectorFlags.Key, "key", "", "The key of the data in the configmap")
removeNodeSelectorsCmd.Flags().StringVar(&nodeSelectorFlags.DeployName, "deployName", "", "The flag to specify the deployment name")
removeNodeSelectorsCmd.Flags().StringVarP(&nodeSelectorFlags.Component, "component", "c", "", "The flag to specify the component name")
removeNodeSelectorsCmd.Flags().StringVarP(&nodeSelectorFlags.Namespace, "namespace", "n", "", "The namespace of the Knative Operator or the Knative component")
return removeNodeSelectorsCmd
}
func validateNodeSelectorFlags(keyValuesCMDFlags common.KeyValueFlags) error {
if keyValuesCMDFlags.Component == "" {
return fmt.Errorf("You need to specify the component for Knative.")
}
if keyValuesCMDFlags.Namespace == "" {
return fmt.Errorf("You need to specify the namespace.")
}
if keyValuesCMDFlags.Component != "" && !strings.EqualFold(keyValuesCMDFlags.Component, common.ServingComponent) && !strings.EqualFold(keyValuesCMDFlags.Component, common.EventingComponent) {
return fmt.Errorf("You need to specify the component for Knative: serving or eventing.")
}
if keyValuesCMDFlags.Key != "" {
if keyValuesCMDFlags.DeployName == "" {
return fmt.Errorf("You need to specify the name of the deployment.")
}
}
return nil
}
func deleteNodeSelectors(nodeSelectorFlags common.KeyValueFlags, p *pkg.OperatorParams) error {
ksCR, err := common.GetKnativeOperatorCR(p)
if err != nil {
return err
}
workloadOverrides, err := ksCR.GetDeployments(nodeSelectorFlags.Component, nodeSelectorFlags.Namespace)
if err != nil {
return err
}
workloadOverrides = removeNodeSelectorsDeployFields(workloadOverrides, nodeSelectorFlags)
if err = retry.RetryOnConflict(retry.DefaultRetry, func() error {
return ksCR.UpdateDeployments(nodeSelectorFlags.Component, nodeSelectorFlags.Namespace, workloadOverrides)
}); err != nil {
return err
}
return nil
}
func removeNodeSelectorsDeployFields(workloadOverrides []base.WorkloadOverride, nodeSelectorFlags common.KeyValueFlags) []base.WorkloadOverride {
if nodeSelectorFlags.DeployName == "" {
for i := range workloadOverrides {
workloadOverrides[i].NodeSelector = nil
}
} else if nodeSelectorFlags.Key == "" {
for i, deploy := range workloadOverrides {
if deploy.Name == nodeSelectorFlags.DeployName {
workloadOverrides[i].NodeSelector = nil
}
}
} else if nodeSelectorFlags.Key != "" {
for i, deploy := range workloadOverrides {
if deploy.Name == nodeSelectorFlags.DeployName {
nodeSelector := make(map[string]string)
for key, value := range workloadOverrides[i].NodeSelector {
if key != nodeSelectorFlags.Key {
nodeSelector[key] = value
}
}
workloadOverrides[i].NodeSelector = nodeSelector
}
}
}
return workloadOverrides
}