supervisor下的Dockerfile的多服务镜像封装操作

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。

以上这篇supervisor下的Dockerfile的多服务镜像封装操作就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持共生网络。