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。

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