Kubernetes国内源加速

朱雀 2022-10-05 08:57 6阅读 0赞

google gcr.io、k8s.gcr.io 国内镜像

# 1.首先添加docker官方的国内镜像 #

sudo tee /etc/docker/daemon.json <<-'EOF'
    {
        
      "registry-mirrors": ["https://docker.mirrors.ustc.edu.cn","https://registry.docker-cn.com"]
    }
    EOF

# 2.gcr.io镜像 #

根据开源项目：[https://github.com/anjia0532/gcr.io\_mirror][https_github.com_anjia0532_gcr.io_mirror]  
作者将gcr.io相关镜像pull下来，然后push到docker官方仓库，相关转换语法如下：

## （1）语法 ##

gcr.io/namespace/image_name:image_tag 
    # 等价于
    anjia0532/namespace.image_name:image_tag

# 特别的
    k8s.gcr.io/{
        image}/{
        tag} <==> gcr.io/google-containers/{
        image}/{
        tag} <==> anjia0532/google-containers.{
        image}/{
        tag}

## （2）批量转换 ##

# replace gcr.io/google-containers/federation-controller-manager-arm64:v1.3.1-beta.1 to real image
    # this will convert gcr.io/google-containers/federation-controller-manager-arm64:v1.3.1-beta.1 
    # to anjia0532/google-containers.federation-controller-manager-arm64:v1.3.1-beta.1 and pull it
    # k8s.gcr.io/{image}/{tag} <==> gcr.io/google-containers/{image}/{tag} <==> anjia0532/google-containers.{image}/{tag}
    
    images=$(cat img.txt)
    #or 
    #images=$(cat <<EOF
    # gcr.io/google-containers/federation-controller-manager-arm64:v1.3.1-beta.1
    # gcr.io/google-containers/federation-controller-manager-arm64:v1.3.1-beta.1
    # gcr.io/google-containers/federation-controller-manager-arm64:v1.3.1-beta.1
    #EOF
    #)
    
    eval $(echo ${
         images}|
            sed 's/k8s\.gcr\.io/anjia0532\/google-containers/g;s/gcr\.io/anjia0532/g;s/\//\./g;s/ /\n/g;s/anjia0532\./anjia0532\//g' |
            uniq |
            awk '{print "docker pull "$1";"}'
           )
    
    # this code will retag all of anjia0532's image from local  e.g. anjia0532/google-containers.federation-controller-manager-arm64:v1.3.1-beta.1 
    # to gcr.io/google-containers/federation-controller-manager-arm64:v1.3.1-beta.1
    # k8s.gcr.io/{image}/{tag} <==> gcr.io/google-containers/{image}/{tag} <==> anjia0532/google-containers.{image}/{tag}
    
    for img in $(docker images --format "{
         {.Repository}}:{
         {.Tag}}"| grep "anjia0532"); do
      n=$(echo ${
         img}| awk -F'[/.:]' '{printf "gcr.io/%s",$2}')
      image=$(echo ${
         img}| awk -F'[/.:]' '{printf "/%s",$3}')
      tag=$(echo ${
         img}| awk -F'[:]' '{printf ":%s",$2}')
      docker tag $img "${n}${image}${tag}"
      [[ ${n} == "gcr.io/google-containers" ]] && docker tag $img "k8s.gcr.io${image}${tag}"
    done

# 3.pull-google-container 工具脚本 #

K8S的exapmle里的yaml默认是k8s.gcr.io的镜像，为了方便运行我们可以预先拉取相关镜像：

vim pull-google.sh:

image=$1
      echo $1
      img=`echo $image | sed 's/k8s\.gcr\.io/anjia0532\/google-containers/g;s/gcr\.io/anjia0532/g;s/\//\./g;s/ /\n/g;s/_/-/g;s/anjia0532\./anjia0532\//g' | uniq | awk '{print ""$1""}'`
      echo "docker pull $img"
      docker pull $img
      echo  "docker tag $img $image"
      docker tag $img $image

然后放到/usr/local/bin

chmod +x  pull-google.sh && cp  pull-google.sh /usr/local/bin/pull-google-container

就可以愉快的使用pull-google-container 命令了

pull-google-container gcr.io/google-samples/gb-frontend:v4
    gcr.io/google-samples/gb-frontend:v4
    docker pull anjia0532/google-samples.gb-frontend:v4
    v4: Pulling from anjia0532/google-samples.gb-frontend
    Digest: sha256:aaa5b327ef3b4cb705513ab674fa40df66981616950c7de4912a621f9ee03dd4
    Status: Image is up to date for anjia0532/google-samples.gb-frontend:v4
    docker tag anjia0532/google-samples.gb-frontend:v4 gcr.io/google-samples/gb-frontend:v4

# 4.替换已有的yaml #

除了预先拉取镜像，我们还可以将k8s.gcr.io 替换为可执行镜像  
为了方便替换，我们编写一个repair\_yaml 脚本：

vim /usr/local/bin/repair_yaml

cp $1 "$1.bak"
    cat $1.bak | sed 's/k8s\.gcr\.io\//anjia0532\/google-containers./g;s/gcr\.io\/$.*$\//anjia0532\/\1./g;s/google_/google-/g;' > $1
    rm -f "$1.bak"

保存退出，然后

chmod +x /usr/local/bin/repair_yaml

效果：

$ repair_yaml frontend-deployment.yaml 
    $ cat frontend-deployment.yaml 
    apiVersion: apps/v1 #  for k8s versions before 1.9.0 use apps/v1beta2  and before 1.8.0 use extensions/v1beta1
    kind: Deployment
    metadata:
      name: frontend
    spec:
      selector:
        matchLabels:
          app: guestbook
          tier: frontend
      replicas: 3
      template:
        metadata:
          labels:
            app: guestbook
            tier: frontend
        spec:
          containers:
          - name: php-redis
            image: anjia0532/google-samples.gb-frontend:v4
            resources:
              requests:
                cpu: 100m
                memory: 100Mi
            env:
            - name: GET_HOSTS_FROM
              value: dns
              # If your cluster config does not include a dns service, then to
              # instead access environment variables to find service host
              # info, comment out the 'value: dns' line above, and uncomment the
              # line below:
              # value: env
            ports:
            - containerPort: 80

> 参考链接  
> [google gcr.io、k8s.gcr.io 国内镜像][google gcr.io_k8s.gcr.io]  
> [国内拉取google kubernetes镜像][google kubernetes]

[https_github.com_anjia0532_gcr.io_mirror]: https://github.com/anjia0532/gcr.io_mirror
[google gcr.io_k8s.gcr.io]: https://www.cnblogs.com/xiaoqi/archive/2018/10/09/gcr-io-and-k8s-gcr-io.html
[google kubernetes]: https://blog.csdn.net/networken/article/details/84571373