1、Kubernetes本地私有仓库

Docker仓库主要用于存放Docker镜像，Docker仓库分为公共仓库和私有仓库，基于registry可以搭建本地私有仓库。使用私有仓库有如下优点：

1）节省网络带宽，针对于每个镜像不用去Docker官网仓库下载；

2）下载Docker镜像从本地私有仓库中下载；

3）组件公司内部私有仓库，方便各部门使用，服务器管理更加统一；

4） 可以基于GIT或者SVN、Jenkins更新本地Docker私有仓库镜像版本。

2、构建Docker 本地私有仓库方法

1）下载Docker registry镜像

docker pull registry

2）启动私有仓库容器，启动命令如下：

mkdir -p /data/registry/docker run -itd  -p  5000:5000 -v /data/registry/:/tmp/registry docker.io/registry

Docker 本地仓库启动后容器启动，

默认情况下，会将仓库存放于容器内的/tmp/registry目录下，这样如果容器被删除，则存放于容器中的镜像也会丢失，所以我们一般情况下会指定本地一个目录挂载到容器内的/tmp/registry下。

3、上传镜像至本地私有仓库

客户端上传镜像至本地私有仓库，如下以docker.io/lemonbar/centos6-ssh 为例，上传至私有仓库服务器

docker pull docker.io/lemonbar/centos6-ssh docker tag efd998bd6817 centos6-ssh #改名字docker rmi docker.io/lemonbar/centos6-ssh docker tag centos-ssh 192.168.0.112:5000/centos6-sshdocker push 192.168.0.112:5000/centos6-ssh

4、检测本地私有仓库：

curl -XGET http://192.168.0.112:5000/v2/_catalogcurl -XGET http://192.168.0.112:5000/v2/centos6-ssh/tags/list

5、在docker配置文件中添加如下代码并且重启 

OPTIONS='--selinux-enabled --log-driver=journald --signature-verification=false --insecure-registry 192.168.0.112:5000'ADD_REGISTRY='--add-registry 192.168.0.112:5000'

 

 

 6、Kubernetes Pods配置私有仓库

创建kuber-namespace.yaml

{"kind": "Namespace","apiVersion": "v1","metadata": {"name": "kube-system"}}

建kubernetes-dashboard.yaml，读取本地私有仓库，代码如下：

# Copyright 2015 Google Inc. 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.# Configuration to deploy release version of the Dashboard UI.## Example usage: kubectl create -f 
     
      kind: DeploymentapiVersion: extensions/v1beta1metadata:  labels:     app: kubernetes-dashboard    version: latest  name: kubernetes-dashboard  namespace: kube-systemspec:  replicas: 2   selector:    matchLabels:      app: kubernetes-dashboard  template:    metadata:      labels:        app: kubernetes-dashboard    spec:      containers:      - name: kubernetes-dashboard        image: 192.168.0.112:5000/kubernetes-dashboard-amd64        imagePullPolicy: Always        ports:        - containerPort: 9090          protocol: TCP        args:          # Uncomment the following line to manually specify Kubernetes API server Host          # If not specified, Dashboard will attempt to auto discover the API server and connect          # to it. Uncomment only if the default does not work.          - --apiserver-host=192.168.0.111:8080        livenessProbe:          httpGet:            path: /            port: 9090          initialDelaySeconds: 30          timeoutSeconds: 30---kind: ServiceapiVersion: v1metadata:  labels:    app: kubernetes-dashboard  name: kubernetes-dashboard  namespace: kube-systemspec:  type: NodePort  ports:  - port: 80    targetPort: 9090  selector:    app: kubernetes-dashboard
     

1)在docker主机添加本地仓库地址 vim /etc/docker/daemon.json

{"insecure-registries":["192.168.0.112:5000"]}

2)/etc/kubernetes/kubelet配置文件将KUBELET_POD_INFRA_CONTAINER选项注释，同时添加一个新的KUBELET_POD_INFRA_CONTAINER参数，代码如下，前提需要将pod-infrastructure镜像上传私有仓库 

在每台nodes上重启kubelet服务：systemctl  restart  kubelet.service

#KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=192.168.0.112:5000/pod-infrastructure:latest"

3) nodes上Docker配置文件/etc/sysconfig/docker中，添加如下代码，并重启Docker服务:

ADD_REGISTRY='--add-registry 192.168.0.112:5000'