Docker Study Notes Six: Using Alibaba Cloud Mirror Warehouse to Accelerate and Enable Remote Access

1. Mirror acceleration

1) Register an account

https://dev.aliyun.com/search.html

Alibaba Cloud will automatically assign the user an address of an image accelerator. After logging in, go to "Administration Center" --> "Accelerator", which contains the address of the image accelerator assigned to you and the usage instructions for each environment.

Mirror accelerator address: https://xxxxx.mirror.aliyuncs.com

 

2) Execute the following command on the docker host

# The system requires CentOS 7 or above and Docker 1.9 or above.

       

sudo cp -n /lib/systemd/system/docker.service /etc/systemd/system/docker.service
sudo sed -i "s|ExecStart=/usr/bin/docker-current daemon|ExecStart=/usr/bin/docker-current daemon --registry-mirror=https://xxxxx.mirror.aliyuncs.com|g" /etc/systemd/system/docker.service
sudo systemctl daemon-reload
sudo service docker restart

 

Note: Here you should pay attention to the docker startup command in the /etc/systemd/system/docker.service file. I installed docker version 1.10, and the startup command is /usr/bin/docker-current, so execute the second sed command to use docker-current.

 

3) When downloading the image, just pull it normally, for example: docker pull centos, docker will use the Alibaba Cloud image for acceleration.

 

 

2. Enable remote access

Reference: http://blog.csdn.net/wangtaoking1/article/details/44494847

 

1) Add remote access configuration

sudo vi /etc/sysconfig/docker-network

# /etc/sysconfig/docker-network
DOCKER_NETWORK_OPTIONS="-H unix:///var/run/docker.sock -H 0.0.0.0:2375"

 

 

 

 2) restart docker

sudo systemctl daemon-reload

sudo service docker restart

 

3) Firewall opens port 2375

 

4) Description: Check /etc/systemd/system/docker.service to find:

The command to start the docker service is:

ExecStart=/usr/bin/docker-current daemon --registry-mirror=https://xxxx.mirror.aliyuncs.com \
          --exec-opt native.cgroupdriver=systemd \
          $OPTIONS \
          $DOCKER_STORAGE_OPTIONS \
          $DOCKER_NETWORK_OPTIONS \
          $ADD_REGISTRY \
          $BLOCK_REGISTRY \
          $INSECURE_REGISTRY

 

 

The $ parameters that follow are configured in the following files:

EnvironmentFile=-/etc/sysconfig/docker
EnvironmentFile=-/etc/sysconfig/docker-storage
EnvironmentFile=-/etc/sysconfig/docker-network

 

 

开启远程访问的参数一般为$DOCKER_NETWORK_OPTIONS，其配置在/etc/sysconfig/docker-network中，我们也可以自己增加一些参数，然后加到启动命令的后面。

 

5）使用说明：

开启远程访问后，可以在其它docker主机上对该机器进行远程访问，比如查看远程docker主机的镜像：

sudo docker -H 10.211.55.9:2375 images

 

参数说明：

-H 10.211.55.9:2375：远程docker主机的ip地址和端口

 

如果使用maven的话，也可以使用maven插件实现自动部署镜像的功能，比如使用Dockerfile自动构建：

<plugin>
    <groupId>com.spotify</groupId>
    <artifactId>docker-maven-plugin</artifactId>
    <version>0.2.9</version>
    <configuration>
        <imageName>${project.name}:${project.version}</imageName>
        <dockerDirectory>${project.basedir}/src/main/docker</dockerDirectory>
        <skipDockerBuild>false</skipDockerBuild>
        <dockerHost>http://10.211.55.9:2375</dockerHost>
        <resources>
            <resource>
                <directory>${project.build.directory}</directory>
                <include>${project.build.finalName}.jar</include>
            </resource>
        </resources>
    </configuration>
</plugin>

 

 

说明：

imageName：生成的镜像名称
dockerDirectory：Dockerfile工作目录
skipDockerBuild：不跳过构建，就是执行镜像构建
dockerHost：docker的主机地址
resource：拷贝到Dockerfile工作目录的资源，此处是将生成的jar文件拷贝过去，本例中此处生成的jar文件为config-1.0.0-SNAPSHOT.jar

 

 

Dockerfile：

FROM java:8
VOLUME /tmp
RUN mkdir /app
ADD config-1.0.0-SNAPSHOT.jar /app/app.jar
ADD runboot.sh /app/
RUN bash -c 'touch /app/app.jar'
WORKDIR /app
RUN chmod a+x runboot.sh
EXPOSE 8888
CMD /app/runboot.sh

 

 

runboot.sh:

java -Djava.security.egd=file:/dev/./urandom -jar /app/app.jar

 

说明：

-Djava.security.egd=file:/dev/./urandom：java随机数生成策略，采用非阻塞方式

 

 

执行构建命令：

mvn clean package docker:build -DskipTests

 

mvn clean package docker:build -DskipTests -X ：打印debug信息