这篇文章给大家介绍如何在supervisor中使用Dockerfile封装多服务镜像，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。
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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
FROM python:latest
WORKDIR /root/
RUN mkdir /etc/supervisor
RUN mkdir -p /root/projects/logs/gunicorn/
RUN mkdir -p /root/projects/logs/celery/
RUN mkdir -p /root/projects/Sy_EvaluateJkApi/logs/
RUN echo "deb http://mirrors.aliyun.com/debian/ buster main non-free contrib" > /etc/apt/sources.list
RUN echo "deb-src http://mirrors.aliyun.com/debian/ buster main non-free contrib" >> /etc/apt/sources.list
RUN echo "deb http://mirrors.aliyun.com/debian-security buster/updates main" >> /etc/apt/sources.list
RUN echo "deb-src http://mirrors.aliyun.com/debian-security buster/updates main" >> /etc/apt/sources.list
RUN echo "deb http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib" >> /etc/apt/sources.list
RUN echo "deb-src http://mirrors.aliyun.com/debian/ buster-updates main non-free contrib" >> /etc/apt/sources.list
RUN echo "deb http://mirrors.aliyun.com/debian/ buster-backports main non-free contrib" >> /etc/apt/sources.list
RUN echo "deb-src http://mirrors.aliyun.com/debian/ buster-backports main non-free contrib" >> /etc/apt/sources.list
RUN apt-get update -y
RUN apt-get install -y git lrzsz vim
RUN pip install supervisor -i https://mirrors.aliyun.com/pypi/simple/
RUN pip install gunicorn -i https://mirrors.aliyun.com/pypi/simple/
RUN pip install gevent -i https://mirrors.aliyun.com/pypi/simple/
RUN /usr/local/bin/echo_supervisord_conf > /etc/supervisord.conf
RUN echo "[include]">>/etc/supervisord.conf
RUN echo "files = /etc/supervisor/*.ini">>/etc/supervisord.conf
ADD sy.ini /etc/supervisor/sy.ini
ADD Sy_EvaluateJkApi /root/projects/Sy_EvaluateJkApi
RUN pip3 install -r /root/projects/Sy_EvaluateJkApi/requirements.txt -i https://mirrors.aliyun.com/pypi/simple/
EXPOSE 8800
CMD ["supervisord","-c","/etc/supervisord.conf"]
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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新闻标题：如何在supervisor中使用Dockerfile封装多服务镜像-创新互联
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