Docker registry 与 持续集成

1.如何建立私有的 Docker Hub

docker是一个非常好用的虚拟化工具。

Registry 在git上分为老代码库和新代码库，老代码push,pull 存在性能问题，新代码库采用go语言编写大大优化了push和pull的效率。

下面给出建立私有docker hub的方法。docker将私有hub的环境打包在registry image中

tag 为latest的版本为 0.9.1 版本，这里直接采用2.1.1版本
执行指令：

$ sudo docker pull registry:2.1.

启动容器：

$ sudo docker run -d -v /opt/registry:/var/lib/registry -p 5000:5000 --restart=always --name registry registry:2.1.

Registry服务默认会将上传的镜像保存在容器的/var/lib/registry，我们将主机的/opt/registry目录挂载到该目录，即可实现将镜像保存到主机的/opt/registry目录了。

这条指令启动一个基于registry image的cotainer。并将host主机的port 5000绑定到虚拟机的端口5000。

通过docker ps 查看

[root@hadoop /]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
6e6f720c3fbc        registry:2.1.      "/bin/registry /et..."    seconds ago       Up  seconds        0.0.0.0:->/tcp   registry
711859caf110        ubuntu              "/bin/bash"               hours ago        Up  hours                                  newcontent
b206b1748020        mysql:5.5           "docker-entrypoint..."    hours ago        Up  hours         /tcp                 mysqldb
abdf172d98e0        test/centos         "./var/tmp/tomcat/..."    hours ago        Up  hours         0.0.0.0:->/tcp   testContainer
[root@hadoop /]# 

可通过浏览器查看：

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" 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这样，对该host主机端口5000的任何访问都转移到虚拟机中。
上传image：
首先通过docker tag 将image标志为要推送到私有仓库：

docker tag $ID $IP:$port/$name

如

[root@hadoop /]# docker tag hello-world 127.0.0.1:5000/hello-world

查看镜像：

[root@hadoop /]# docker images
REPOSITORY                   TAG                 IMAGE ID            CREATED             SIZE
test/centos                  latest              0235ea6a1dc1         hours ago         MB
<none>                       <none>              f07e6d9bd519         hours ago         MB
mysql                        5.5                 0697aa95507c         days ago           MB
ubuntu                       latest              0ef2e08ed3fa         days ago           MB
ubuntu                       14.04               7c09e61e9035         days ago           MB
docker-whale                 latest              17104b3a899f         days ago           MB
127.0.0.1:/hello-world   latest              48b5124b2768         weeks ago         1.84 kB
hello-world                  latest              48b5124b2768         weeks ago         1.84 kB
centos                       latest              67591570dd29         months ago         MB
registry                     2.1.               52bb991b482e         months ago        MB
[root@hadoop /]# 

直接使用doker push 将镜像上传到私有库

[root@hadoop /]# docker push 127.0.0.1:/hello-world
The push refers to a repository [127.0.0.1:/hello-world]
98c944e98de8: Pushed
latest: digest: sha256:720abce70775606fa539d38acc4d58d96eea22d51d7d06d269f6c5d6702e50a5 size:
[root@hadoop /]# 

在浏览器中输入 http://127.0.0.1:5000/v2/_catalog可以查看已经上传的镜像

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" alt="" />

同时可在宿主机本地/opt/registry目录下查看到，这样在Container挂掉的时候，我们在宿主机依旧可以查看到镜像

[root@hadoop ~]# cd /opt/registry/
[root@hadoop registry]# ls
docker

下载image：

先将本地的 hello-world 镜像删除掉

[root@hadoop registry]# docker rmi hello-world
Untagged: hello-world:latest
Untagged: hello-world@sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7
[root@hadoop registry]# 

使用 docker pull 拉取镜像

[root@hadoop registry]# docker pull 127.0.0.1:/hello-world
Using default tag: latest
latest: Pulling from hello-world
983bfa07a342: Pull complete
Digest: sha256:720abce70775606fa539d38acc4d58d96eea22d51d7d06d269f6c5d6702e50a5
Status: Downloaded newer image for 127.0.0.1:/hello-world:latest

使用私有仓库push可能会出现的问题：因为启动的registry服务不是安全可信的，需要修改docker配置文件 /etc/default/docker

添加  DOCKER_OPTS="--insecure-registry xxx.xxx.xxx.xxx:5000" 并重启docker 服务 service docker restart

2.将git上的项目git到本地，这里使用的osgit (http://git.oschina.net)

[root@bogon ~]# git clone https://git.oschina.net/wq3435/second.git

若提示

bash: git: command not found...

说明没有安装 git

安装git，CentOS下使用：

yum install git -y
或
yum install -y git

在Ubuntu 或 Debian下使用

apt-get install git -y

3.在git到本地后会有如下的目录

[root@bogon second]# ls
README.md  centos7  docker-compose.yml  hello  jdk  jenkins  jre  maven  mysql  tomcat

第一个文件 docker-compose.xml

mysql:                        #先启动一个叫mysql的docker容器（也可以任务是创建名叫mysql的docker容器），命名叫 mysql:,因为是yml文件对格式缩进要求非常严格
   image: mysql:5.5   #采用的镜像是 csphere/mysql:5.5
   ports:                  #给宿主机和container的端口进行映射
     - "3306:3306"
   volumes:　　　　　　　　#把宿主机的文件目录/var/lib/docker/vfs/dir/dataxc 映射到container的文件目录 /var/lib/mysql
     - /var/lib/docker/vfs/dir/dataxc:/var/lib/mysql  #这样的做法是当Container删掉以后，这个目录下的文件还是存在的(可以应用到生产中registry的映射)
   hostname: mydb.server.com  #这里的hostname和docker run --name 的name是不一样的，后者是 docker ps 中显示的name，而这里的hostname是系统本地
　　　　　　　　　　　　　　　　　　#在/etc/hostname 中的hostname是一个意思
tomcat:
   image: tomcat:7.0.
   ports:
      - "8080:8080"
   links:           #links的两个作用 ①在tomcat中想访问mysql，可以再etc/host下写上ip地址和主机名，这样就可以直接连通了，不需要做域名解析.②可以直接访问msyql容器中的环境变量　　　　　　　　　　　　
      - mysql:db   #给mysql起的一个别名db
   environment:   #配置环境变量，也可以通过 docker run -e 环境变量  配置环境变量
      - TOMCAT_USER=admin
      - TOMCAT_PASS=admin
   hostname: tomcat.server.com

4.使用docker-compose.xml 启动

[root@bogon second]# docker-compose up -d
bash: docker-compose: command not found...

这里显示没有安装docker-compose

安装docker-compose

一种方式：

$ curl -L "https://github.com/docker/compose/releases/download/1.11.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

$ chmod +x /usr/local/bin/docker-compose

上述方式可能会很慢。

第二种方式

1、首先检查Linux有没有安装Python-pip包，直接执行 yum install python-pip

yum install python-pip

2、没有python-pip包就执行命令 yum -y install epel-release

yum -y install epel-release

3、执行成功之后，再次执行yum install python-pip

yum install python-pip

4.安装好pip之后，就可以安装Docker-Compose了.在linunx终端执行：pip install docker-compose.

[root@bogon ~]# pip install docker-compose

5.安装成功

[root@bogon ~]# docker-compose --version
docker-compose version 1.11., build dfed245
[root@bogon ~]# 

安装好docker-compose后再次执行 docker-compose up -d

[root@bogon second]# docker-compose up -d
Creating second_mysql_1
Creating second_tomcat_1