supervisor下的Dockerfile的多服务镜像封装操作

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2021年10月14日22:25:51supervisor下的Dockerfile的多服务镜像封装操作已关闭评论 42 2684字阅读8分56秒

编写Dockerfile文件

配置yum源

cd /tmp/docker
vim Dockerfile
FROM rhel7
EXPOSE 80 22  # 向外暴露80和22的端口
COPY dvd.repo /etc/yum.repos.d/dvd.repo
&& yum install -y httpd openssh-server openssh-clients supervisor
&& yum clean all 
&& ssh-keygen -q -t rsa -f /etc/ssh/ssh_host_rsa_key -N "" 
&& ssh-keygen -q -t ecdsa -f /etc/ssh/ssh_host_ed25519_key -N "" 
&& echo root:redhat | chpasswd
COPY supervisord.conf /etc/supervisord.conf
CMD ["/usr/bin/supervisord"]
vim supervisord.conf
[supervisord]
nodaemon=true

[program:sshd]
command=/usr/sbin/sshd -D

[program:httpd]
command=/usr/sbin/httpd
docker build -t rhel7:v3
Sending build context to Docker daemon 8.192 kB
Step 1/6 : FROM rhel7
 ---> 0a3eb3fde7fd
Step 2/6 : EXPOSE 80 22
 ---> Running in 5727c9e984a5
 ---> e25a8a0821f7
Removing intermediate container 5727c9e984a5
Step 3/6 : COPY dvd.repo /etc/yum.repos.d/dvd.repo
 ---> 2d9e8f9648a7
Removing intermediate container 62955f7a7a74
Step 4/6 : RUN rpmdb --rebuilddb && yum install -y httpd openssh-server openssh-clients supervisor && yum clean all && ssh-keygen -q -t rsa -f /etc/ssh/ssh_host_rsa_key -N "" && ssh-keygen -q -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key -N "" && ssh-keygen -q -t ecdsa -f /etc/ssh/ssh_host_ed25519_key -N "" && echo root:redhat | chpasswd
Dependency Updated:
 elfutils-libelf.x86_64 0:0.166-2.el7                     

Complete!
Skipping unreadable repository '///etc/yum.repos.d/rhel7.repo'
Cleaning repos: docker dvd-rhel
Cleaning up everything
 ---> 1cb2f9e34bac
Removing intermediate container 33cb452dbc8d
Step 5/6 : COPY supervisord.conf /etc/supervisord.conf
 ---> e8de2ff5ca3c
Removing intermediate container f219cb2b6a88
Step 6/6 : CMD /usr/bin/supervisord
 ---> Running in eddfb3973ad2
 ---> dbf4cf5cb116
Removing intermediate container eddfb3973ad2
Successfully built dbf4cf5cb116

docker run -d --name vm1 -v /tmp/docker/web/:/var/www/html rhel7:v3

docker ps

docker inspect vm1
      "Networks": {
        "bridge": {
          "IPAMConfig": null,
          "Links": null,
          "Aliases": null,
          "NetworkID": "126902125dd9c54631622845c1a75d656b45023840c57944ec24f4acecf6dc3f",
          "EndpointID": "3d995f01fce91968f59b151a19ba3868292efe0a61c2ef355bcd1eb84bda7248",
          "Gateway": "172.17.0.1",
          "IPAddress": "172.17.0.2",  # 容器的ip
          "IPPrefixLen": 16,
          "IPv6Gateway": "",
          "GlobalIPv6Address": "",
          "GlobalIPv6PrefixLen": 0,
          "MacAddress": "02:42:ac:11:00:02"
        }
      }

验证:

curl 172.17.0.2

验证sshd服务:

补充知识:使用Dockerfile构建supervisor容器部署项目,CMD ["supervisord","-c","/etc/supervisord.conf"]执行失败

问题描述:

在编写Dockerfile创建supervisor容器时,最后一条启动supervisor的命令不起作用 -> CMD ["supervisord","-c","/etc/supervisord.conf"],但是进到容器内部执行supervisord -c /etc/supervisord.conf可以成功运行。

先贴出来Dockerfile文件代码

使用docker build -t system:test . 命令构建容器镜像没有异常,但是使用docker run -itd system:test运行容器就会显示容器不在运行。

解决方式:

把CMD ["supervisord","-c","/etc/supervisord.conf"]命令改成CMD ["supervisord","-n","-c","/etc/supervisord.conf"]就可以成功运行了。

supervisor里是这么写的-n/--nodaemon -- run in the foreground (same as 'nodaemon=true' in config file),加了-n让supervisor在前台保持运行就可以了。

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