Set the container hostnames same as pod hostname

Signed-off-by: Mrunal Patel <mpatel@redhat.com>

server/container_create.go

@@ -394,6 +394,10 @@ func (s *Server) createSandboxContainer(ctx context.Context, containerID string,
 		specgen.AddBindMount(sb.resolvPath, "/etc/resolv.conf", []string{"ro"})
 	}
 
+	if sb.hostname != "" {
+		specgen.SetHostname(sb.hostname)
+	}
+
 	specgen.AddAnnotation("ocid/name", containerName)
 	specgen.AddAnnotation("ocid/sandbox_id", sb.id)
 	specgen.AddAnnotation("ocid/sandbox_name", sb.infraContainer.Name())

server/sandbox.go

@@ -141,6 +141,7 @@ type sandbox struct {
 	cgroupParent   string
 	privileged     bool
 	resolvPath     string
+	hostname       string
 }
 
 const (

server/sandbox_run.go

@@ -259,6 +259,7 @@ func (s *Server) RunPodSandbox(ctx context.Context, req *pb.RunPodSandboxRequest
 	g.AddAnnotation("ocid/shm_path", shmPath)
 	g.AddAnnotation("ocid/privileged_runtime", fmt.Sprintf("%v", privileged))
 	g.AddAnnotation("ocid/resolv_path", resolvPath)
+	g.AddAnnotation("ocid/hostname", hostname)
 
 	sb := &sandbox{
 		id:           id,
@@ -273,6 +274,7 @@ func (s *Server) RunPodSandbox(ctx context.Context, req *pb.RunPodSandboxRequest
 		shmPath:      shmPath,
 		privileged:   privileged,
 		resolvPath:   resolvPath,
+		hostname:     hostname,
 	}
 
 	s.addSandbox(sb)