Add support for launching containers without CGroups

This is mostly used with Systemd, which really wants to manage
CGroups itself when managing containers via unit file.

Signed-off-by: Matthew Heon <matthew.heon@pm.me>

1 files changed, 8 insertions, 0 deletions

diff --git a/libpod/container_internal.go b/libpod/container_internal.go
index ffc6c11ee..1ca20a05d 100644
--- a/libpod/container_internal.go
+++ b/libpod/container_internal.go
@@ -1119,6 +1119,10 @@ func (c *Container) stop(timeout uint) error {
 
 // Internal, non-locking function to pause a container
 func (c *Container) pause() error {
+	if c.config.NoCgroups {
+		return errors.Wrapf(define.ErrNoCgroups, "cannot pause without using CGroups")
+	}
+
 	if err := c.ociRuntime.pauseContainer(c); err != nil {
 		return err
 	}
@@ -1132,6 +1136,10 @@ func (c *Container) pause() error {
 
 // Internal, non-locking function to unpause a container
 func (c *Container) unpause() error {
+	if c.config.NoCgroups {
+		return errors.Wrapf(define.ErrNoCgroups, "cannot unpause without using CGroups")
+	}
+
 	if err := c.ociRuntime.unpauseContainer(c); err != nil {
 		return err
 	}