Merge pull request #34430 from champtar/portmap

Add externalSetMarkChain to portmap config

content/en/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins.md

@@ -109,7 +109,8 @@ If you want to enable `hostPort` support, you must specify `portMappings capabil
     },
     {
       "type": "portmap",
-      "capabilities": {"portMappings": true}
+      "capabilities": {"portMappings": true},
+      "externalSetMarkChain": "KUBE-MARK-MASQ"
     }
   ]
 }

content/en/docs/tasks/administer-cluster/migrating-from-dockershim/troubleshooting-cni-plugin-related-errors.md

@@ -129,7 +129,8 @@ cat << EOF | tee /etc/cni/net.d/10-containerd-net.conflist
    },
    {
      "type": "portmap",
-     "capabilities": {"portMappings": true}
+     "capabilities": {"portMappings": true},
+     "externalSetMarkChain": "KUBE-MARK-MASQ"
    }
  ]
 }