podman-remote pause|unpause

Add the ability to pause and unpause containers with the remote client.

Also turned on the pause tests!

Signed-off-by: baude <bbaude@redhat.com>

3 files changed, 228 insertions, 0 deletions

diff --git a/pkg/adapter/containers.go b/pkg/adapter/containers.go
index 063ecfbfb..5279f11b2 100644
--- a/pkg/adapter/containers.go
+++ b/pkg/adapter/containers.go
@@ -607,3 +607,90 @@ func (r *LocalRuntime) Start(ctx context.Context, c *cliconfig.StartValues, sigP
 	}
 	return exitCode, lastError
 }
+
+// PauseContainers removes container(s) based on CLI inputs.
+func (r *LocalRuntime) PauseContainers(ctx context.Context, cli *cliconfig.PauseValues) ([]string, map[string]error, error) {
+	var (
+		ok       = []string{}
+		failures = map[string]error{}
+		ctrs     []*libpod.Container
+		err      error
+	)
+
+	maxWorkers := shared.DefaultPoolSize("pause")
+	if cli.GlobalIsSet("max-workers") {
+		maxWorkers = cli.GlobalFlags.MaxWorks
+	}
+	logrus.Debugf("Setting maximum rm workers to %d", maxWorkers)
+
+	if cli.All {
+		ctrs, err = r.GetRunningContainers()
+	} else {
+		ctrs, err = shortcuts.GetContainersByContext(false, false, cli.InputArgs, r.Runtime)
+	}
+	if err != nil {
+		return ok, failures, err
+	}
+
+	pool := shared.NewPool("pause", maxWorkers, len(ctrs))
+	for _, c := range ctrs {
+		ctr := c
+		pool.Add(shared.Job{
+			ID: ctr.ID(),
+			Fn: func() error {
+				err := ctr.Pause()
+				if err != nil {
+					logrus.Debugf("Failed to pause container %s: %s", ctr.ID(), err.Error())
+				}
+				return err
+			},
+		})
+	}
+	return pool.Run()
+}
+
+// UnpauseContainers removes container(s) based on CLI inputs.
+func (r *LocalRuntime) UnpauseContainers(ctx context.Context, cli *cliconfig.UnpauseValues) ([]string, map[string]error, error) {
+	var (
+		ok       = []string{}
+		failures = map[string]error{}
+		ctrs     []*libpod.Container
+		err      error
+	)
+
+	maxWorkers := shared.DefaultPoolSize("pause")
+	if cli.GlobalIsSet("max-workers") {
+		maxWorkers = cli.GlobalFlags.MaxWorks
+	}
+	logrus.Debugf("Setting maximum rm workers to %d", maxWorkers)
+
+	if cli.All {
+		var filterFuncs []libpod.ContainerFilter
+		filterFuncs = append(filterFuncs, func(c *libpod.Container) bool {
+			state, _ := c.State()
+			return state == libpod.ContainerStatePaused
+		})
+		ctrs, err = r.GetContainers(filterFuncs...)
+	} else {
+		ctrs, err = shortcuts.GetContainersByContext(false, false, cli.InputArgs, r.Runtime)
+	}
+	if err != nil {
+		return ok, failures, err
+	}
+
+	pool := shared.NewPool("pause", maxWorkers, len(ctrs))
+	for _, c := range ctrs {
+		ctr := c
+		pool.Add(shared.Job{
+			ID: ctr.ID(),
+			Fn: func() error {
+				err := ctr.Unpause()
+				if err != nil {
+					logrus.Debugf("Failed to unpause container %s: %s", ctr.ID(), err.Error())
+				}
+				return err
+			},
+		})
+	}
+	return pool.Run()
+}
diff --git a/pkg/adapter/containers_remote.go b/pkg/adapter/containers_remote.go
index d5314c382..cb61871bf 100644
--- a/pkg/adapter/containers_remote.go
+++ b/pkg/adapter/containers_remote.go
@@ -45,6 +45,18 @@ func (c *Container) ID() string {
 	return c.config.ID
 }
 
+// Pause a container
+func (c *Container) Pause() error {
+	_, err := iopodman.PauseContainer().Call(c.Runtime.Conn, c.ID())
+	return err
+}
+
+// Unpause a container
+func (c *Container) Unpause() error {
+	_, err := iopodman.UnpauseContainer().Call(c.Runtime.Conn, c.ID())
+	return err
+}
+
 // Config returns a container config
 func (r *LocalRuntime) Config(name string) *libpod.ContainerConfig {
 	// TODO the Spec being returned is not populated.  Matt and I could not figure out why.  Will defer
@@ -90,6 +102,19 @@ func (r *LocalRuntime) Spec(name string) (*specs.Spec, error) {
 	return &data, nil
 }
 
+// LookupContainers is a wrapper for LookupContainer
+func (r *LocalRuntime) LookupContainers(idsOrNames []string) ([]*Container, error) {
+	var containers []*Container
+	for _, name := range idsOrNames {
+		ctr, err := r.LookupContainer(name)
+		if err != nil {
+			return nil, err
+		}
+		containers = append(containers, ctr)
+	}
+	return containers, nil
+}
+
 // LookupContainer gets basic information about container over a varlink
 // connection and then translates it to a *Container
 func (r *LocalRuntime) LookupContainer(idOrName string) (*Container, error) {
@@ -107,6 +132,24 @@ func (r *LocalRuntime) LookupContainer(idOrName string) (*Container, error) {
 	}, nil
 }
 
+func (r *LocalRuntime) LookupContainersWithStatus(filters []string) ([]*Container, error) {
+	var containers []*Container
+	ctrs, err := iopodman.GetContainersByStatus().Call(r.Conn, filters)
+	if err != nil {
+		return nil, err
+	}
+	// This is not performance savy; if this turns out to be a problematic series of lookups, we need to
+	// create a new endpoint to speed things up
+	for _, ctr := range ctrs {
+		container, err := r.LookupContainer(ctr.Id)
+		if err != nil {
+			return nil, err
+		}
+		containers = append(containers, container)
+	}
+	return containers, nil
+}
+
 func (r *LocalRuntime) GetLatestContainer() (*Container, error) {
 	reply, err := iopodman.GetContainersByContext().Call(r.Conn, false, true, nil)
 	if err != nil {
@@ -643,3 +686,70 @@ func (r *LocalRuntime) Start(ctx context.Context, c *cliconfig.StartValues, sigP
 	}
 	return exitCode, finalErr
 }
+
+// PauseContainers pauses container(s) based on CLI inputs.
+func (r *LocalRuntime) PauseContainers(ctx context.Context, cli *cliconfig.PauseValues) ([]string, map[string]error, error) {
+	var (
+		ok       []string
+		failures = map[string]error{}
+		ctrs     []*Container
+		err      error
+	)
+
+	if cli.All {
+		filters := []string{libpod.ContainerStateRunning.String()}
+		ctrs, err = r.LookupContainersWithStatus(filters)
+	} else {
+		ctrs, err = r.LookupContainers(cli.InputArgs)
+	}
+	if err != nil {
+		return ok, failures, err
+	}
+
+	for _, c := range ctrs {
+		c := c
+		err := c.Pause()
+		if err != nil {
+			failures[c.ID()] = err
+		} else {
+			ok = append(ok, c.ID())
+		}
+	}
+	return ok, failures, nil
+}
+
+// UnpauseContainers unpauses containers based on input
+func (r *LocalRuntime) UnpauseContainers(ctx context.Context, cli *cliconfig.UnpauseValues) ([]string, map[string]error, error) {
+	var (
+		ok       = []string{}
+		failures = map[string]error{}
+		ctrs     []*Container
+		err      error
+	)
+
+	maxWorkers := shared.DefaultPoolSize("unpause")
+	if cli.GlobalIsSet("max-workers") {
+		maxWorkers = cli.GlobalFlags.MaxWorks
+	}
+	logrus.Debugf("Setting maximum rm workers to %d", maxWorkers)
+
+	if cli.All {
+		filters := []string{libpod.ContainerStatePaused.String()}
+		ctrs, err = r.LookupContainersWithStatus(filters)
+	} else {
+		ctrs, err = r.LookupContainers(cli.InputArgs)
+	}
+	if err != nil {
+		return ok, failures, err
+	}
+	for _, c := range ctrs {
+		c := c
+		err := c.Unpause()
+		if err != nil {
+			failures[c.ID()] = err
+		} else {
+			ok = append(ok, c.ID())
+		}
+	}
+	return ok, failures, nil
+}
diff --git a/pkg/varlinkapi/containers.go b/pkg/varlinkapi/containers.go
index 17792ccfe..237407050 100644
--- a/pkg/varlinkapi/containers.go
+++ b/pkg/varlinkapi/containers.go
@@ -128,6 +128,37 @@ func (i *LibpodAPI) GetContainersByContext(call iopodman.VarlinkCall, all, lates
 	return call.ReplyGetContainersByContext(ids)
 }
 
+// GetContainersByStatus returns a slice of containers filtered by a libpod status
+func (i *LibpodAPI) GetContainersByStatus(call iopodman.VarlinkCall, statuses []string) error {
+	var (
+		filterFuncs []libpod.ContainerFilter
+		containers  []iopodman.Container
+	)
+	for _, status := range statuses {
+		lpstatus, err := libpod.StringToContainerStatus(status)
+		if err != nil {
+			return call.ReplyErrorOccurred(err.Error())
+		}
+		filterFuncs = append(filterFuncs, func(c *libpod.Container) bool {
+			state, _ := c.State()
+			return state == lpstatus
+		})
+	}
+	filteredContainers, err := i.Runtime.GetContainers(filterFuncs...)
+	if err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+	opts := shared.PsOptions{Size: true, Namespace: true}
+	for _, ctr := range filteredContainers {
+		batchInfo, err := shared.BatchContainerOp(ctr, opts)
+		if err != nil {
+			return call.ReplyErrorOccurred(err.Error())
+		}
+		containers = append(containers, makeListContainer(ctr.ID(), batchInfo))
+	}
+	return call.ReplyGetContainersByStatus(containers)
+}
+
 // InspectContainer ...
 func (i *LibpodAPI) InspectContainer(call iopodman.VarlinkCall, name string) error {
 	ctr, err := i.Runtime.LookupContainer(name)