package command
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import (
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"flag"
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"fmt"
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"strings"
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"github.com/hashicorp/serf/cmd/serf/command/agent"
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"github.com/mitchellh/cli"
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)
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// TagsCommand is an interface to dynamically add or otherwise modify a
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// running serf agent's tags.
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type TagsCommand struct {
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Ui cli.Ui
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}
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var _ cli.Command = &TagsCommand{}
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func (c *TagsCommand) Help() string {
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helpText := `
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Usage: serf tags [options] ...
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Modifies tags on a running Serf agent.
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Options:
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-rpc-addr=127.0.0.1:7373 RPC Address of the Serf agent.
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-rpc-auth="" RPC auth token of the Serf agent.
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-set key=value Creates or modifies the value of a tag
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-delete key Removes a tag, if present
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`
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return strings.TrimSpace(helpText)
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}
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func (c *TagsCommand) Run(args []string) int {
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var tagPairs []string
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var delTags []string
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cmdFlags := flag.NewFlagSet("tags", flag.ContinueOnError)
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cmdFlags.Usage = func() { c.Ui.Output(c.Help()) }
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cmdFlags.Var((*agent.AppendSliceValue)(&tagPairs), "set",
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"tag pairs, specified as key=value")
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cmdFlags.Var((*agent.AppendSliceValue)(&delTags), "delete",
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"tag keys to unset")
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rpcAddr := RPCAddrFlag(cmdFlags)
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rpcAuth := RPCAuthFlag(cmdFlags)
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if err := cmdFlags.Parse(args); err != nil {
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return 1
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}
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if len(tagPairs) == 0 && len(delTags) == 0 {
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c.Ui.Output(c.Help())
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return 1
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}
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client, err := RPCClient(*rpcAddr, *rpcAuth)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error connecting to Serf agent: %s", err))
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return 1
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}
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defer client.Close()
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tags, err := agent.UnmarshalTags(tagPairs)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error: %s", err))
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return 1
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}
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if err := client.UpdateTags(tags, delTags); err != nil {
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c.Ui.Error(fmt.Sprintf("Error setting tags: %s", err))
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return 1
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}
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c.Ui.Output("Successfully updated agent tags")
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return 0
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}
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func (c *TagsCommand) Synopsis() string {
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return "Modify tags of a running Serf agent"
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}
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