168 lines
4 KiB
Go
168 lines
4 KiB
Go
package command
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import (
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"fmt"
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"strings"
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"github.com/hashicorp/nomad/api"
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"github.com/hashicorp/nomad/api/contexts"
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"github.com/posener/complete"
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)
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type AllocRestartCommand struct {
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Meta
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}
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func (a *AllocRestartCommand) Help() string {
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helpText := `
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Usage: nomad alloc restart [options] <allocation> <task>
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Restart an existing allocation. This command is used to restart a specific alloc
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and its tasks. If no task is provided then all of the allocation's tasks will
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be restarted.
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When ACLs are enabled, this command requires a token with the
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'alloc-lifecycle', 'read-job', and 'list-jobs' capabilities for the
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allocation's namespace.
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General Options:
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` + generalOptionsUsage(usageOptsDefault) + `
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Restart Specific Options:
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-verbose
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Show full information.
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`
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return strings.TrimSpace(helpText)
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}
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func (c *AllocRestartCommand) Name() string { return "alloc restart" }
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func (c *AllocRestartCommand) Run(args []string) int {
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var verbose bool
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flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
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flags.Usage = func() { c.Ui.Output(c.Help()) }
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flags.BoolVar(&verbose, "verbose", false, "")
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if err := flags.Parse(args); err != nil {
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return 1
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}
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// Check that we got exactly one alloc
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args = flags.Args()
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if len(args) < 1 || len(args) > 2 {
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c.Ui.Error("This command takes one or two arguments: <alloc-id> <task-name>")
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c.Ui.Error(commandErrorText(c))
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return 1
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}
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allocID := args[0]
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// Truncate the id unless full length is requested
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length := shortId
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if verbose {
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length = fullId
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}
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// Query the allocation info
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if len(allocID) == 1 {
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c.Ui.Error("Alloc ID must contain at least two characters.")
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return 1
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}
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allocID = sanitizeUUIDPrefix(allocID)
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// Get the HTTP client
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client, err := c.Meta.Client()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
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return 1
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}
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allocs, _, err := client.Allocations().PrefixList(allocID)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying allocation: %v", err))
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return 1
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}
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if len(allocs) == 0 {
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c.Ui.Error(fmt.Sprintf("No allocation(s) with prefix or id %q found", allocID))
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return 1
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}
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if len(allocs) > 1 {
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// Format the allocs
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out := formatAllocListStubs(allocs, verbose, length)
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c.Ui.Error(fmt.Sprintf("Prefix matched multiple allocations\n\n%s", out))
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return 1
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}
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// Prefix lookup matched a single allocation
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q := &api.QueryOptions{Namespace: allocs[0].Namespace}
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alloc, _, err := client.Allocations().Info(allocs[0].ID, q)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Error querying allocation: %s", err))
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return 1
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}
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var taskName string
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if len(args) == 2 {
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// Validate Task
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taskName = args[1]
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err := validateTaskExistsInAllocation(taskName, alloc)
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if err != nil {
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c.Ui.Error(err.Error())
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return 1
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}
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}
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err = client.Allocations().Restart(alloc, taskName, nil)
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Failed to restart allocation:\n\n%s", err.Error()))
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return 1
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}
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return 0
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}
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func validateTaskExistsInAllocation(taskName string, alloc *api.Allocation) error {
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tg := alloc.Job.LookupTaskGroup(alloc.TaskGroup)
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if tg == nil {
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return fmt.Errorf("Could not find allocation task group: %s", alloc.TaskGroup)
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}
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foundTaskNames := make([]string, len(tg.Tasks))
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for i, task := range tg.Tasks {
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foundTaskNames[i] = task.Name
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if task.Name == taskName {
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return nil
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}
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}
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return fmt.Errorf("Could not find task named: %s, found:\n%s", taskName, formatList(foundTaskNames))
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}
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func (a *AllocRestartCommand) Synopsis() string {
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return "Restart a running allocation"
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}
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func (c *AllocRestartCommand) AutocompleteArgs() complete.Predictor {
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// Here we attempt to autocomplete allocations for any position of arg.
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// We should eventually try to auto complete the task name if the arg is
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// at position 2.
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return complete.PredictFunc(func(a complete.Args) []string {
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client, err := c.Meta.Client()
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if err != nil {
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return nil
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}
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resp, _, err := client.Search().PrefixSearch(a.Last, contexts.Allocs, nil)
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if err != nil {
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return []string{}
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}
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return resp.Matches[contexts.Allocs]
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})
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}
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