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docker之使用supervisor管理多个进程
docker之使用supervisor管理多个进程
docker题外话:
centos7安装supervisor:
源码编译安装:
下载源码文件:supervisor-3.3.1.tar.gz 下载地址:https://pypi.python.org/pypi/supervisor
安装: [root@cenots7 src]# tar -zxf supervisor-3.3.1.tar.gz [root@cenots7 src]# cd supervisor-3.3.1/ [root@cenots7 supervisor-3.3.1]# python setup.py install 检查是否安装成功: 登陆python控制台输入import supervisor 查看是否能成功加载 [root@cenots7 supervisor-3.3.1]# python Python 2.7.5 (default, Sep 15 2016, 22:37:39) [GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import supervisor >>>
生成配置文件: [root@cenots7 supervisor-3.3.1]# mkdir /etc/supervisor [root@cenots7 supervisor-3.3.1]# echo_supervisord_conf > /etc/supervisor/supervisord.conf [root@cenots7 supervisor-3.3.1]# grep -E -v ‘^;|^$‘ /etc/supervisor/supervisord.conf [unix_http_server] file=/tmp/supervisor.sock ; (the path to the socket file) [supervisord] logfile=/tmp/supervisord.log ; (main log file;default $CWD/supervisord.log) logfile_maxbytes=50MB ; (max main logfile bytes b4 rotation;default 50MB) logfile_backups=10 ; (num of main logfile rotation backups;default 10) loglevel=info ; (log level;default info; others: debug,warn,trace) pidfile=/tmp/supervisord.pid ; (supervisord pidfile;default supervisord.pid) nodaemon=false ; (start in foreground if true;default false) minfds=1024 ; (min. avail startup file descriptors;default 1024) minprocs=200 ; (min. avail process descriptors;default 200) [rpcinterface:supervisor] supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface [supervisorctl] serverurl=unix:///tmp/supervisor.sock ; use a unix:// URL for a unix socket
启动服务: [root@cenots7 tmp]# supervisord -c /etc/supervisor/supervisord.conf 关闭服务: [root@cenots7 tmp]# supervisorctl shutdown Shut down 查看状态: [root@cenots7 tmp]# supervisorctl status 启动或停止某一个服务: supervisorctl stop|start program_name
yum直接安装:
rpm -Uvh https://mirrors.ustc.edu.cn/fedora/epel/7/x86_64/e/epel-release-7-8.noarch.rpm yum update;yum -y install supervisor cat /etc/supervisord.conf supervisord -c /etc/supervisord.conf
说明:
Docker 容器在启动的时候开启单个进程,比如,一个 ssh 或者 apache 的 daemon 服务。但我们经常需要在一个机器上开启多个服务,这可以有很多方法,最简单的就是把多个启动命令放到一个启动脚本里面,启动的时候直接启动这个脚本,另外就是安装进程管理工具
使用进程管理工具 supervisor 来管理容器中的多个进程。使用 Supervisor 可以更好的控制、管理、重启我们希望运行的进程
在这里我们演示一下容器中如何同时使用 ssh 和 tomcat 服务
配置:
首先创建Dockerfile文件:
[root@cenots7 shencj]# vim Dockerfile # centos:ssh # # VERSION 0.0.1 FROM centos MAINTAINER shencj "732233048@qq.com" #ssh RUN yum install -y openssh openssh-server openssh-clients RUN mkdir /var/run/sshd RUN ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key RUN ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key RUN sed -i ‘s/#UseDNS yes/UseDNS no/g‘ /etc/ssh/sshd_config RUN sed -i ‘s/GSSAPIAuthentication yes/GSSAPIAuthentication no/g‘ /etc/ssh/sshd_config RUN /bin/echo ‘root:123456‘ |chpasswd RUN /bin/sed -i ‘s/.*session.*required.*pam_loginuid.so.*/session optional pam_loginuid.so/g‘ /etc/pam.d/sshd RUN /bin/echo -e "LANG=\"en_US.UTF-8\"" > /etc/default/local #tomcat ADD apache-tomcat-7.0.41.tar.gz /usr/local/src/ COPY jdk-7u80-linux-x64.rpm /usr/local/src/ WORKDIR /usr/local/src/ RUN rpm -ivh jdk-7u80-linux-x64.rpm ENV JAVA_HOME /usr/java/jdk1.7.0_80 ENV PATH $PATH:$JAVA_HOME/bin ENV CLASSPATH .:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar #RUN java -version RUN mkdir -p /usr/local/tools RUN cp -r apache-tomcat-7.0.41 /usr/local/tools/tomcat7_8080 #supervisor RUN rpm -Uvh https://mirrors.ustc.edu.cn/fedora/epel/7/x86_64/e/epel-release-7-8.noarch.rpm RUN yum update;yum -y install supervisor RUN mkdir -p /etc/supervisor/ COPY supervisord.conf /etc/supervisor/ EXPOSE 22 8080 CMD supervisord -c /etc/supervisor/supervisord.conf #CMD ["supervisord","-c","/etc/supervisor/supervisord.conf"]
[root@cenots7 shencj]# vim supervisord.conf [unix_http_server] file=/var/run/supervisor/supervisor.sock ; (the path to the socket file) [supervisord] logfile=/var/run/supervisor/supervisord.log ; (main log file;default $CWD/supervisord.log) logfile_maxbytes=50MB ; (max main logfile bytes b4 rotation;default 50MB) logfile_backups=10 ; (num of main logfile rotation backups;default 10) loglevel=info ; (log level;default info; others: debug,warn,trace) pidfile=/var/run/supervisor/supervisord.pid ; (supervisord pidfile;default supervisord.pid) nodaemon=true ; (start in foreground if true;default false) minfds=1024 ; (min. avail startup file descriptors;default 1024) minprocs=200 ; (min. avail process descriptors;default 200) [rpcinterface:supervisor] supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface [supervisorctl] serverurl=unix:///var/run/supervisor/supervisor.sock ; use a unix:// URL for a unix socket [program:sshd] command=/usr/sbin/sshd -D [program:tomcat] command=/usr/local/tools/tomcat7_8080/bin/catalina.sh run
注意:
serverurl=unix:///var/run/supervisor/supervisor.sock : 这个建议不要修改
nodaemon=true : 设置为true
command=/usr/local/tools/tomcat7_8080/bin/catalina.sh run :这个必须这样写(supervisor管理tomcat必须这样启动,其他方式好像都有问题),参考:http://serverfault.com/questions/425132/controlling-tomcat-with-supervisor
创建镜像:
[root@cenots7 shencj]# docker build -t shencj/centos-ssh-tomcat:v1 .
运行容器:
[root@cenots7 shencj]# docker run -d --name ssh-tomcat --restart=always -p 4426:22 -p 82:8080 shencj/centos-ssh-tomcat:v1 cc8006c07f6c703c476c69ecc3699f0c9a1e5f456949e65a8e92b55dafa8be1e [root@cenots7 shencj]#
查看容器:
[root@cenots7 shencj]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES cc8006c07f6c shencj/centos-ssh-tomcat:v1 "/bin/sh -c ‘supervis" 56 seconds ago Up 54 seconds 0.0.0.0:4426->22/tcp, 0.0.0.0:82->8080/tcp ssh-tomcat
登录容器:
[root@cenots7 shencj]# ssh localhost -p 4426 root@localhost‘s password: [root@cc8006c07f6c ~]# ps -ef UID PID PPID C STIME TTY TIME CMD root 1 0 0 03:56 ? 00:00:00 /usr/bin/python /usr/bin/supervisord -c /etc/supervisor/supervisord.conf root 7 1 0 03:56 ? 00:00:00 /usr/sbin/sshd -D root 8 1 3 03:56 ? 00:00:03 /usr/java/jdk1.7.0_80/bin/java -Djava.util.logging.config.file=/usr/local/tools/tomcat7_8080/conf/logging.properties -Djava.util.logging.manager=org.apa root 30 7 0 03:58 ? 00:00:00 sshd: root@pts/0 root 32 30 0 03:58 pts/0 00:00:00 -bash root 45 32 0 03:58 pts/0 00:00:00 ps -ef [root@cc8006c07f6c ~]# supervisorctl status sshd RUNNING pid 7, uptime 0:02:58 tomcat RUNNING pid 8, uptime 0:02:58
访问tomcat:
http://ip:82
本文出自 “见” 博客,请务必保留此出处http://732233048.blog.51cto.com/9323668/1861018
docker之使用supervisor管理多个进程