Implement kpod rm

Kpod rm removes a container from the system

Signed-off-by: Ryan Cole <rcyoalne@gmail.com>

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Signed-off-by: umohnani8 <umohnani@redhat.com>

libkpod/remove.go

@@ -0,0 +1,49 @@
+package libkpod
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/kubernetes-incubator/cri-o/oci"
+	"github.com/pkg/errors"
+)
+
+// Remove removes a container
+func (c *ContainerServer) Remove(container string, force bool) (string, error) {
+	ctr, err := c.LookupContainer(container)
+	if err != nil {
+		return "", err
+	}
+	ctrID := ctr.ID()
+
+	cState := c.runtime.ContainerStatus(ctr)
+	if cState.Status == oci.ContainerStateCreated || cState.Status == oci.ContainerStateRunning {
+		if force {
+			_, err = c.ContainerStop(container, -1)
+			if err != nil {
+				return "", errors.Wrapf(err, "unable to stop container %s", ctrID)
+			}
+		} else {
+			return "", errors.Errorf("cannot remove running container %s", ctrID)
+		}
+	}
+
+	if err := c.runtime.DeleteContainer(ctr); err != nil {
+		return "", errors.Wrapf(err, "failed to delete container %s", ctrID)
+	}
+	if err := os.Remove(filepath.Join(c.Config().RuntimeConfig.ContainerExitsDir, ctrID)); err != nil && !os.IsNotExist(err) {
+		return "", errors.Wrapf(err, "failed to remove container exit file %s", ctrID)
+	}
+	c.RemoveContainer(ctr)
+
+	if err := c.storageRuntimeServer.DeleteContainer(ctrID); err != nil {
+		return "", errors.Wrapf(err, "failed to delete storage for container %s", ctrID)
+	}
+
+	c.ReleaseContainerName(ctr.Name())
+
+	if err := c.ctrIDIndex.Delete(ctrID); err != nil {
+		return "", err
+	}
+	return ctrID, nil
+}

libkpod/stop.go

@@ -0,0 +1,28 @@
+package libkpod
+
+import (
+	"github.com/kubernetes-incubator/cri-o/oci"
+	"github.com/pkg/errors"
+)
+
+// ContainerStop stops a running container with a grace period (i.e., timeout).
+func (c *ContainerServer) ContainerStop(container string, timeout int64) (string, error) {
+	ctr, err := c.LookupContainer(container)
+	if err != nil {
+		return "", errors.Wrapf(err, "failed to find container %s", container)
+	}
+
+	cStatus := c.runtime.ContainerStatus(ctr)
+	if cStatus.Status != oci.ContainerStateStopped {
+		if err := c.runtime.StopContainer(ctr, timeout); err != nil {
+			return "", errors.Wrapf(err, "failed to stop container %s", ctr.ID())
+		}
+		if err := c.storageRuntimeServer.StopContainer(ctr.ID()); err != nil {
+			return "", errors.Wrapf(err, "failed to unmount container %s", ctr.ID())
+		}
+	}
+
+	c.ContainerStateToDisk(ctr)
+
+	return ctr.ID(), nil
+}