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[kubectl plugin] Add validate and find commands (#65)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| // Unless explicitly stated otherwise all files in this repository are licensed | ||
| // under the Apache License Version 2.0. | ||
| // This product includes software developed at Datadog (https://www.datadoghq.com/). | ||
| // Copyright 2016-2020 Datadog, Inc. | ||
|
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| package find | ||
|
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| import ( | ||
| "errors" | ||
| "fmt" | ||
|
|
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| "github.com/DataDog/datadog-operator/pkg/plugin/common" | ||
|
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| "github.com/spf13/cobra" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/cli-runtime/pkg/genericclioptions" | ||
| ) | ||
|
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||
| var ( | ||
| findExample = ` | ||
| # find the datadog agent pod monitoring a pod named foo | ||
| %[1]s find foo | ||
| ` | ||
| ) | ||
|
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| // options provides information required by Datadog find command | ||
| type options struct { | ||
| genericclioptions.IOStreams | ||
| common.Options | ||
| args []string | ||
| podName string | ||
| } | ||
|
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| // newOptions provides an instance of getOptions with default values | ||
| func newOptions(streams genericclioptions.IOStreams) *options { | ||
| o := &options{ | ||
| IOStreams: streams, | ||
| } | ||
| o.SetConfigFlags() | ||
| return o | ||
| } | ||
|
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| // New provides a cobra command wrapping options for "find" sub command | ||
| func New(streams genericclioptions.IOStreams) *cobra.Command { | ||
| o := newOptions(streams) | ||
| cmd := &cobra.Command{ | ||
| Use: "find [pod name] [flags]", | ||
| Short: "Find datadog agent pod monitoring a given pod", | ||
| Example: fmt.Sprintf(findExample, "kubectl datadog"), | ||
| SilenceUsage: true, | ||
| RunE: func(c *cobra.Command, args []string) error { | ||
| if err := o.complete(c, args); err != nil { | ||
| return err | ||
| } | ||
| if err := o.validate(); err != nil { | ||
| return err | ||
| } | ||
| return o.run(c) | ||
| }, | ||
| } | ||
|
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| o.ConfigFlags.AddFlags(cmd.Flags()) | ||
|
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| return cmd | ||
| } | ||
|
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| // complete sets all information required for processing the command | ||
| func (o *options) complete(cmd *cobra.Command, args []string) error { | ||
| o.args = args | ||
| if len(args) > 0 { | ||
| o.podName = args[0] | ||
| } | ||
| return o.Init(cmd) | ||
| } | ||
|
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| // validate ensures that all required arguments and flag values are provided | ||
| func (o *options) validate() error { | ||
| if o.podName == "" { | ||
| return errors.New("pod name argument is missing") | ||
| } | ||
| argsCount := len(o.args) | ||
| if argsCount > 1 { | ||
| return fmt.Errorf("one argument is allowed, got %d", argsCount) | ||
| } | ||
| return nil | ||
| } | ||
|
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| // run runs the find command | ||
| func (o *options) run(cmd *cobra.Command) error { | ||
| pod, err := o.Clientset.CoreV1().Pods(o.UserNamespace).Get(o.podName, metav1.GetOptions{}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| agentName, err := o.getAgentByNode(pod.Spec.NodeName) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| cmd.Println(fmt.Sprintf("Agent %s is monitoring %s", agentName, o.podName)) | ||
| return nil | ||
| } | ||
|
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| // getAgentByNode returns the pod of the datadog agent running on a given node | ||
| func (o *options) getAgentByNode(nodeName string) (string, error) { | ||
| podList, err := o.Clientset.CoreV1().Pods("").List(metav1.ListOptions{ | ||
| FieldSelector: fmt.Sprintf("spec.nodeName=%s", nodeName), | ||
| LabelSelector: common.AgentLabel, | ||
| }) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| if len(podList.Items) == 0 { | ||
| return "", fmt.Errorf("no agent pod found. Label selector used: %s", common.AgentLabel) | ||
| } | ||
| return podList.Items[0].Name, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| // Unless explicitly stated otherwise all files in this repository are licensed | ||
| // under the Apache License Version 2.0. | ||
| // This product includes software developed at Datadog (https://www.datadoghq.com/). | ||
| // Copyright 2016-2020 Datadog, Inc. | ||
|
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| package ad | ||
|
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| import ( | ||
| "github.com/DataDog/datadog-operator/cmd/kubectl-datadog/validate/ad/pod" | ||
| "github.com/DataDog/datadog-operator/cmd/kubectl-datadog/validate/ad/service" | ||
|
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| "github.com/spf13/cobra" | ||
| "k8s.io/cli-runtime/pkg/genericclioptions" | ||
| ) | ||
|
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| // options provides information required by ad command | ||
| type options struct { | ||
| genericclioptions.IOStreams | ||
| configFlags *genericclioptions.ConfigFlags | ||
| } | ||
|
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| // newOptions provides an instance of options with default values | ||
| func newOptions(streams genericclioptions.IOStreams) *options { | ||
| return &options{ | ||
| configFlags: genericclioptions.NewConfigFlags(false), | ||
| IOStreams: streams, | ||
| } | ||
| } | ||
|
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| // New provides a cobra command wrapping options for "ad" sub command | ||
| func New(streams genericclioptions.IOStreams) *cobra.Command { | ||
| cmd := &cobra.Command{ | ||
| Use: "ad [subcommand] [flags]", | ||
| } | ||
|
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| cmd.AddCommand(pod.New(streams)) | ||
| cmd.AddCommand(service.New(streams)) | ||
|
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| o := newOptions(streams) | ||
| o.configFlags.AddFlags(cmd.Flags()) | ||
|
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| return cmd | ||
| } |
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