open-nomad/command/deployment_pause.go

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package command
import (
"fmt"
"strings"
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"github.com/hashicorp/nomad/api/contexts"
"github.com/posener/complete"
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)
type DeploymentPauseCommand struct {
Meta
}
func (c *DeploymentPauseCommand) Help() string {
helpText := `
Usage: nomad deployment pause [options] <deployment id>
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Pause is used to pause a deployment. Pausing a deployment will pause the
placement of new allocations as part of rolling deployment.
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When ACLs are enabled, this command requires a token with the 'submit-job'
and 'read-job' capabilities for the deployment's namespace.
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General Options:
` + generalOptionsUsage(usageOptsDefault) + `
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Pause Options:
-verbose
Display full information.
`
return strings.TrimSpace(helpText)
}
func (c *DeploymentPauseCommand) Synopsis() string {
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return "Pause a deployment"
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}
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func (c *DeploymentPauseCommand) AutocompleteFlags() complete.Flags {
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return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
complete.Flags{
"-verbose": complete.PredictNothing,
})
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}
func (c *DeploymentPauseCommand) AutocompleteArgs() complete.Predictor {
return complete.PredictFunc(func(a complete.Args) []string {
client, err := c.Meta.Client()
if err != nil {
return nil
}
resp, _, err := client.Search().PrefixSearch(a.Last, contexts.Deployments, nil)
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if err != nil {
return []string{}
}
return resp.Matches[contexts.Deployments]
})
}
func (c *DeploymentPauseCommand) Name() string { return "deployment pause" }
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func (c *DeploymentPauseCommand) Run(args []string) int {
var verbose bool
flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
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flags.Usage = func() { c.Ui.Output(c.Help()) }
flags.BoolVar(&verbose, "verbose", false, "")
if err := flags.Parse(args); err != nil {
return 1
}
// Check that we got exactly 1 argument
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args = flags.Args()
if l := len(args); l != 1 {
c.Ui.Error("This command takes one argument: <deployment id>")
c.Ui.Error(commandErrorText(c))
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return 1
}
dID := args[0]
// Truncate the id unless full length is requested
length := shortId
if verbose {
length = fullId
}
// Get the HTTP client
client, err := c.Meta.Client()
if err != nil {
c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
return 1
}
// Do a prefix lookup
deploy, possible, err := getDeployment(client.Deployments(), dID)
if err != nil {
c.Ui.Error(fmt.Sprintf("Error retrieving deployment: %s", err))
return 1
}
if len(possible) != 0 {
c.Ui.Error(fmt.Sprintf("Prefix matched multiple deployments\n\n%s", formatDeployments(possible, length)))
return 1
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}
if _, _, err := client.Deployments().Pause(deploy.ID, true, nil); err != nil {
c.Ui.Error(fmt.Sprintf("Error pausing deployment: %s", err))
return 1
}
c.Ui.Output(fmt.Sprintf("Deployment %q paused", deploy.ID))
return 0
}