podman pod create --pid flag

added support for --pid flag. User can specify ns:file, pod, private, or host.
container returns an error since you cannot point the ns of the pods infra container
to a container outside of the pod.

Signed-off-by: cdoern <cdoern@redhat.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/libpod/options.go b/libpod/options.go
index b12153512..bc563d60c 100644
--- a/libpod/options.go
+++ b/libpod/options.go
@@ -16,6 +16,7 @@ import (
 	"github.com/containers/podman/v3/libpod/events"
 	"github.com/containers/podman/v3/pkg/namespaces"
 	"github.com/containers/podman/v3/pkg/rootless"
+	"github.com/containers/podman/v3/pkg/specgen"
 	"github.com/containers/podman/v3/pkg/util"
 	"github.com/containers/storage"
 	"github.com/containers/storage/pkg/idtools"
@@ -2397,3 +2398,22 @@ func WithPodCPUSetCPUs(inp string) PodCreateOption {
 		return nil
 	}
 }
+
+func WithPodPidNS(inp specgen.Namespace) PodCreateOption {
+	return func(p *Pod) error {
+		if p.valid {
+			return define.ErrPodFinalized
+		}
+		if p.config.UsePodPID {
+			switch inp.NSMode {
+			case "container":
+				return errors.Wrap(define.ErrInvalidArg, "Cannot take container in a different NS as an argument")
+			case "host":
+				p.config.UsePodPID = false
+			}
+			p.config.InfraContainer.PidNS = inp
+		}
+
+		return nil
+	}
+}