Add pod pause/unpause

Added Pause() and Unpause() to libpod/pod.go

Added man pages, tests and completions

Signed-off-by: haircommander <pehunt@redhat.com>

Closes: #1126
Approved by: rhatdan

3 files changed, 148 insertions, 0 deletions

diff --git a/cmd/podman/pod.go b/cmd/podman/pod.go
index 65bc9efda..ed79f0711 100644
--- a/cmd/podman/pod.go
+++ b/cmd/podman/pod.go
@@ -12,11 +12,13 @@ Pods are a group of one or more containers sharing the same network, pid and ipc
 	podSubCommands = []cli.Command{
 		podCreateCommand,
 		podKillCommand,
+		podPauseCommand,
 		podPsCommand,
 		podRestartCommand,
 		podRmCommand,
 		podStartCommand,
 		podStopCommand,
+		podUnpauseCommand,
 	}
 	podCommand = cli.Command{
 		Name:                   "pod",
diff --git a/cmd/podman/pod_pause.go b/cmd/podman/pod_pause.go
new file mode 100644
index 000000000..df51a037b
--- /dev/null
+++ b/cmd/podman/pod_pause.go
@@ -0,0 +1,73 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/pkg/errors"
+	"github.com/projectatomic/libpod/cmd/podman/libpodruntime"
+	"github.com/sirupsen/logrus"
+	"github.com/urfave/cli"
+)
+
+var (
+	podPauseFlags = []cli.Flag{
+		cli.BoolFlag{
+			Name:  "all, a",
+			Usage: "pause all running pods",
+		},
+		LatestPodFlag,
+	}
+	podPauseDescription = `
+   Pauses one or more pods.  The pod name or ID can be used.
+`
+
+	podPauseCommand = cli.Command{
+		Name:                   "pause",
+		Usage:                  "Pause one or more pods",
+		Description:            podPauseDescription,
+		Flags:                  podPauseFlags,
+		Action:                 podPauseCmd,
+		ArgsUsage:              "POD-NAME|POD-ID [POD-NAME|POD-ID ...]",
+		UseShortOptionHandling: true,
+	}
+)
+
+func podPauseCmd(c *cli.Context) error {
+	if err := checkMutuallyExclusiveFlags(c); err != nil {
+		return err
+	}
+
+	runtime, err := libpodruntime.GetRuntime(c)
+	if err != nil {
+		return errors.Wrapf(err, "error creating libpod runtime")
+	}
+	defer runtime.Shutdown(false)
+
+	// getPodsFromContext returns an error when a requested pod
+	// isn't found. The only fatal error scenerio is when there are no pods
+	// in which case the following loop will be skipped.
+	pods, lastError := getPodsFromContext(c, runtime)
+
+	for _, pod := range pods {
+		ctr_errs, err := pod.Pause()
+		if ctr_errs != nil {
+			for ctr, err := range ctr_errs {
+				if lastError != nil {
+					logrus.Errorf("%q", lastError)
+				}
+				lastError = errors.Wrapf(err, "unable to pause container %q on pod %q", ctr, pod.ID())
+			}
+			continue
+		}
+		if err != nil {
+			if lastError != nil {
+				logrus.Errorf("%q", lastError)
+			}
+			lastError = errors.Wrapf(err, "unable to pause pod %q", pod.ID())
+			continue
+		}
+		fmt.Println(pod.ID())
+	}
+
+	return lastError
+}
diff --git a/cmd/podman/pod_unpause.go b/cmd/podman/pod_unpause.go
new file mode 100644
index 000000000..5dd5c79e4
--- /dev/null
+++ b/cmd/podman/pod_unpause.go
@@ -0,0 +1,73 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/pkg/errors"
+	"github.com/projectatomic/libpod/cmd/podman/libpodruntime"
+	"github.com/sirupsen/logrus"
+	"github.com/urfave/cli"
+)
+
+var (
+	podUnpauseFlags = []cli.Flag{
+		cli.BoolFlag{
+			Name:  "all, a",
+			Usage: "unpause all paused pods",
+		},
+		LatestPodFlag,
+	}
+	podUnpauseDescription = `
+   Unpauses one or more pods.  The pod name or ID can be used.
+`
+
+	podUnpauseCommand = cli.Command{
+		Name:                   "unpause",
+		Usage:                  "Unpause one or more pods",
+		Description:            podUnpauseDescription,
+		Flags:                  podUnpauseFlags,
+		Action:                 podUnpauseCmd,
+		ArgsUsage:              "POD-NAME|POD-ID [POD-NAME|POD-ID ...]",
+		UseShortOptionHandling: true,
+	}
+)
+
+func podUnpauseCmd(c *cli.Context) error {
+	if err := checkMutuallyExclusiveFlags(c); err != nil {
+		return err
+	}
+
+	runtime, err := libpodruntime.GetRuntime(c)
+	if err != nil {
+		return errors.Wrapf(err, "error creating libpod runtime")
+	}
+	defer runtime.Shutdown(false)
+
+	// getPodsFromContext returns an error when a requested pod
+	// isn't found. The only fatal error scenerio is when there are no pods
+	// in which case the following loop will be skipped.
+	pods, lastError := getPodsFromContext(c, runtime)
+
+	for _, pod := range pods {
+		ctr_errs, err := pod.Unpause()
+		if ctr_errs != nil {
+			for ctr, err := range ctr_errs {
+				if lastError != nil {
+					logrus.Errorf("%q", lastError)
+				}
+				lastError = errors.Wrapf(err, "unable to unpause container %q on pod %q", ctr, pod.ID())
+			}
+			continue
+		}
+		if err != nil {
+			if lastError != nil {
+				logrus.Errorf("%q", lastError)
+			}
+			lastError = errors.Wrapf(err, "unable to unpause pod %q", pod.ID())
+			continue
+		}
+		fmt.Println(pod.ID())
+	}
+
+	return lastError
+}