Added option to share kernel namespaces in libpod and podman

A pause container is added to the pod if the user opts in. The default pause image and command can be overridden. Pause containers are ignored in ps unless the -a option is present. Pod inspect and pod ps show shared namespaces and pause container. A pause container can't be removed with podman rm, and a pod can be removed if it only has a pause container.

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

Closes: #1187
Approved by: mheon

1 files changed, 6 insertions, 0 deletions

diff --git a/pkg/spec/spec.go b/pkg/spec/spec.go
index 7323b2d2b..8d8a07a2e 100644
--- a/pkg/spec/spec.go
+++ b/pkg/spec/spec.go
@@ -349,6 +349,9 @@ func addPidNS(config *CreateConfig, g *generate.Generator) error {
 	if pidMode.IsContainer() {
 		logrus.Debug("using container pidmode")
 	}
+	if IsPod(string(pidMode)) {
+		logrus.Debug("using pod pidmode")
+	}
 	return nil
 }
 
@@ -384,6 +387,9 @@ func addNetNS(config *CreateConfig, g *generate.Generator) error {
 	} else if IsNS(string(netMode)) {
 		logrus.Debug("Using ns netmode")
 		return g.AddOrReplaceLinuxNamespace(spec.NetworkNamespace, NS(string(netMode)))
+	} else if IsPod(string(netMode)) {
+		logrus.Debug("Using pod netmode, unless pod is not sharing")
+		return nil
 	} else if netMode.IsUserDefined() {
 		logrus.Debug("Using user defined netmode")
 		return nil