command/stop: inital stop command

command/stop.go

+package command
+
+import (
+	"fmt"
+	"strings"
+)
+
+type StopCommand struct {
+	Meta
+}
+
+func (c *StopCommand) Help() string {
+	helpText := `
+Usage: nomad stop [options] <job>
+
+  Stop an existing job. This command is used to signal allocations
+  to shut down for the given job ID. The shutdown happens
+  asynchronously, unless the -monitor flag is given, in which case
+  an interactive monitor session will display log lines as the
+  job unwinds and completes shutting down.
+
+General Options:
+
+  ` + generalOptionsUsage() + `
+
+Stop Options:
+
+  -monitor
+    Starts an interactive monitor for the job deregistration. This
+    will display logs in the terminal related to the job shutdown,
+    and return once the job deregistration has completed.
+`
+	return strings.TrimSpace(helpText)
+}
+
+func (c *StopCommand) Synopsis() string {
+	return "Stop a running job"
+}
+
+func (c *StopCommand) Run(args []string) int {
+	var monitor bool
+
+	flags := c.Meta.FlagSet("stop", FlagSetClient)
+	flags.Usage = func() { c.Ui.Output(c.Help()) }
+	flags.BoolVar(&monitor, "monitor", false, "")
+
+	if err := flags.Parse(args); err != nil {
+		return 1
+	}
+
+	// Check that we got exactly one job
+	args = flags.Args()
+	if len(args) != 1 {
+		c.Ui.Error(c.Help())
+		return 1
+	}
+	jobID := args[0]
+
+	// Get the HTTP client
+	client, err := c.Meta.Client()
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
+		return 1
+	}
+
+	// Check if the job exists
+	if _, _, err := client.Jobs().Info(jobID, nil); err != nil {
+		c.Ui.Error(fmt.Sprintf("Error deregistering job: %s", err))
+		return 1
+	}
+
+	// Invoke the stop
+	evalID, _, err := client.Jobs().Deregister(jobID, nil)
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf("Error deregistering job: %s", err))
+		return 1
+	}
+
+	if monitor {
+		mon := newMonitor(c.Ui, client)
+		return mon.monitor(evalID)
+	}
+
+	return 0
+}

command/stop_test.go

+package command
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/mitchellh/cli"
+)
+
+func TestStopCommand_Implements(t *testing.T) {
+	var _ cli.Command = &StopCommand{}
+}
+
+func TestStopCommand_Fails(t *testing.T) {
+	srv, _, url := testServer(t, nil)
+	defer srv.Stop()
+
+	ui := new(cli.MockUi)
+	cmd := &StopCommand{Meta: Meta{Ui: ui}}
+
+	// Fails on misuse
+	if code := cmd.Run([]string{"some", "bad", "args"}); code != 1 {
+		t.Fatalf("expected exit code 1, got: %d", code)
+	}
+	if out := ui.ErrorWriter.String(); !strings.Contains(out, cmd.Help()) {
+		t.Fatalf("expected help output, got: %s", out)
+	}
+	ui.ErrorWriter.Reset()
+
+	// Fails on non-existent job ID
+	if code := cmd.Run([]string{"-address=" + url, "nope"}); code != 1 {
+		t.Fatalf("expect exit 1, got: %d", code)
+	}
+	if out := ui.ErrorWriter.String(); !strings.Contains(out, "not found") {
+		t.Fatalf("expect not found error, got: %s", out)
+	}
+	ui.ErrorWriter.Reset()
+
+	// Fails on connection failure
+	if code := cmd.Run([]string{"-address=nope", "nope"}); code != 1 {
+		t.Fatalf("expected exit code 1, got: %d", code)
+	}
+	if out := ui.ErrorWriter.String(); !strings.Contains(out, "Error deregistering job") {
+		t.Fatalf("expected failed query error, got: %s", out)
+	}
+}

commands.go

@@ -94,6 +94,12 @@ func Commands(metaPtr *command.Meta) map[string]cli.CommandFactory {
 			}, nil
 		},
 
+		"stop": func() (cli.Command, error) {
+			return &command.StopCommand{
+				Meta: meta,
+			}, nil
+		},
+
 		"version": func() (cli.Command, error) {
 			ver := Version
 			rel := VersionPrerelease