kube: add support for --userns=

add support to override the user namespace to use for the pod.

Closes: https://github.com/containers/podman/issues/7504

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

2 files changed, 14 insertions, 1 deletions

diff --git a/pkg/domain/infra/abi/play.go b/pkg/domain/infra/abi/play.go
index f44b46a6d..019361694 100644
--- a/pkg/domain/infra/abi/play.go
+++ b/pkg/domain/infra/abi/play.go
@@ -222,6 +222,16 @@ func (ic *ContainerEngine) playKubePod(ctx context.Context, podName string, podY
 		podOpt.Net.NetworkOptions = netOpts
 	}
 
+	if options.Userns == "" {
+		options.Userns = "host"
+	}
+
+	// Validate the userns modes supported.
+	podOpt.Userns, err = specgen.ParseUserNamespace(options.Userns)
+	if err != nil {
+		return nil, err
+	}
+
 	// FIXME This is very hard to support properly with a good ux
 	if len(options.StaticIPs) > *ipIndex {
 		if !podOpt.Net.Network.IsBridge() {
@@ -352,6 +362,7 @@ func (ic *ContainerEngine) playKubePod(ctx context.Context, podName string, podY
 		infraImage := util.DefaultContainerConfig().Engine.InfraImage
 		infraOptions := entities.NewInfraContainerCreateOptions()
 		infraOptions.Hostname = podSpec.PodSpecGen.PodBasicConfig.Hostname
+		infraOptions.UserNS = options.Userns
 		podSpec.PodSpecGen.InfraImage = infraImage
 		podSpec.PodSpecGen.NoInfra = false
 		podSpec.PodSpecGen.InfraContainerSpec = specgen.NewSpecGenerator(infraImage, false)
@@ -428,6 +439,7 @@ func (ic *ContainerEngine) playKubePod(ctx context.Context, podName string, podY
 			RestartPolicy:      ctrRestartPolicy,
 			SeccompPaths:       seccompPaths,
 			SecretsManager:     secretsManager,
+			UserNSIsHost:       p.Userns.IsHost(),
 			Volumes:            volumes,
 		}
 		specGen, err := kube.ToSpecGen(ctx, &specgenOpts)
@@ -476,6 +488,7 @@ func (ic *ContainerEngine) playKubePod(ctx context.Context, podName string, podY
 			RestartPolicy:      ctrRestartPolicy,
 			SeccompPaths:       seccompPaths,
 			SecretsManager:     secretsManager,
+			UserNSIsHost:       p.Userns.IsHost(),
 			Volumes:            volumes,
 		}
 		specGen, err := kube.ToSpecGen(ctx, &specgenOpts)
diff --git a/pkg/domain/infra/tunnel/play.go b/pkg/domain/infra/tunnel/play.go
index d9637254a..d731a1d6c 100644
--- a/pkg/domain/infra/tunnel/play.go
+++ b/pkg/domain/infra/tunnel/play.go
@@ -20,7 +20,7 @@ func (ic *ContainerEngine) PlayKube(ctx context.Context, body io.Reader, opts en
 	if opts.Annotations != nil {
 		options.WithAnnotations(opts.Annotations)
 	}
-	options.WithNoHosts(opts.NoHosts)
+	options.WithNoHosts(opts.NoHosts).WithUserns(opts.Userns)
 	if s := opts.SkipTLSVerify; s != types.OptionalBoolUndefined {
 		options.WithSkipTLSVerify(s == types.OptionalBoolTrue)
 	}