Use CNI plugin

docker-multinode/cni-plugin.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# Copyright 2016 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Utility functions for Kubernetes in docker setup and for cni network plugin.
+
+kube::cni::ensure_docker_settings(){
+
+  if kube::helpers::command_exists systemctl; then
+    local restart=false
+    DOCKER_CONF=$(systemctl cat docker | head -1 | awk '{print $2}')
+
+    # Clear mtu and bip when previously started in docker-bootstrap mode
+    if [[ ! -z $(grep "mtu=" ${DOCKER_CONF}) && ! -z $(grep "bip=" ${DOCKER_CONF}) ]]; then
+      sed -i 's/--mtu=.* --bip=.*//g' ${DOCKER_CONF}
+      restart=true
+      kube::log::status "The mtu and bip parameters removed"
+    fi
+
+    # If we can find MountFlags but not MountFlags=shared, set MountFlags to shared
+    if [[ ! -z $(grep "MountFlags" ${DOCKER_CONF}) && -z $(grep "MountFlags=shared" ${DOCKER_CONF}) ]]; then
+      sed -i.bak 's/^\(MountFlags=\).*/\1shared/' ${DOCKER_CONF}
+      restart=true
+      kube::log::status "The MountFlags set for shared"
+    fi
+
+    # Check if restart needed
+    if [[ ${restart} == true ]]; then
+      systemctl daemon-reload
+      systemctl restart docker
+      kube::log::status "Restarted docker with service file modification"
+    fi
+
+  fi
+}