Docker uses supervisor to manage multiple processes

Docker uses supervisor to manage multiple processes

Docker digression:

CENTOS7 Installing Supervisor:

Source Code Compilation Installation:

Download source files: supervisor-3.3.1.tar.gz:https://pypi.python.org/pypi/supervisor

 installation:[[email protected] src]# tar -zxf  supervisor-3.3.1.tar.gz[[email protected] src]# cd supervisor-3.3.1/[[email protected ] supervisor-3.3.1]# python setup.py install Check for installation success: Login to python console input import supervisor   See if [[email protected] supervisor-3.3.1]# pythonpython 2.7.5  can be loaded successfully (default,  sep 15 2016, 22:37:39)  [GCC 4.8.5 20150623  (red hat 4.8.5-4 )] on linux2type  "Help",  "copyright",  "credits"  or  "license"  for  More information.>>> import supervisor>>> 

Build configuration file: [[email protected] supervisor-3.3.1]# mkdir /etc/supervisor[[email protected]  supervisor-3.3.1]# echo_supervisord_conf > /etc/supervisor/supervisord.conf [[ email protected] 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 ;d efault  $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  ) [Rpcinterface:supervisor]supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_ Rpcinterface[supervisorctl]serverurl=unix:///tmp/supervisor.sock ; use a unix:// url   for a unix sockeT 

Start service: [[email protected] tmp]# supervisord-c/etc/supervisor/supervisord.conf Close service: [[email protected] tmp]# Supervisorctl Shutdownshut down View status: [[email protected] tmp]# supervisorctl status Start or stop a service: Supervisorctl Stop|start Program_name

Yum Install directly:

RPM-UVH Https://mirrors.ustc.edu.cn/fedora/epel/7/x86_64/e/epel-release-7-8.noarch.rpmyum update;yum-y Install Supervisorcat/etc/supervisord.confsupervisord-c/etc/supervisord.conf

Description

The Docker container opens a single process at startup, such as an SSH or Apache daemon service. But we often need to open multiple services on a machine, this can have many methods, the simplest is to put multiple startup commands in a startup script, start the script directly, and the installation process management tool

Use the Process management tool supervisor to manage multiple processes in a container. Use Supervisor to better control, manage, and restart the processes we want to run

Here we demonstrate how the SSH and Tomcat services are used in the container

Configuration:

     first create Dockerfile file:

[[email protected] shencj]# vim dockerfile # centos:ssh## version                0.0.1 FROM  centosmaintainer shencj  "[email protected]"   #sshRUN  yum install -y  Openssh openssh-server openssh-clientsrun mkdir /var/run/sshdrun ssh-keygen -t  rsa -f /etc/ssh/ssh_host_rsa_keyrun ssh-keygen -t dsa -f /etc/ssh/ssh _host_dsa_keyrun sed -i  ' s/#UseDNS  yes/usedns no/g '  /etc/ssh/sshd_configrun  sed -i  ' s/gssapiauthentication yes/gssapiauthentication no/g '  /etc/ssh/sshd_ configrun /bin/echo  ' root:123456 '  |chpasswdRUN /bin/sed -i  ' s/.*session.* Required.*pam_loginuid.so.*/session optional pam_loginuid.so/g '  /etc/pam.d/sshdrun /bin/ echo -e  "Lang=\" en_US. Utf-8\ ""  > /etc/default/local  #tomcatADD  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.rpmenv java_home /usr/java/jdk1.7.0_80env path  $PATH: $JAVA _home/binenv  classpath .: $JAVA _home/jre/lib/rt.jar: $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jar#run java  -versionrun mkdir -p /usr/local/toolsrun cp -r apache-tomcat-7.0.41 / usr/local/tools/tomcat7_8080  #supervisorRUN  rpm -uvh https://mirrors.ustc.edu.cn/fedora/ epel/7/x86_64/e/epel-release-7-8.noarch.rpmrun yum update;yum -y install  supervisorrun mkdir -p /etc/supervisor/copy supervisord.conf /etc/supervisor/  Expose 22 8080cmd supervisord -c /etc/supervisor/supervisord.conf#cmd [" Supervisord ","-C ","/etc/supervisor/supervisoRd.conf "] 

[[email protected] 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  &Nbsp;            ;  (start in  Foreground if true;default false) minfds=1024                   ;  (min. avail startup file  descriptors;default 1024) minprocs=200                  ;  (min. avail process descriptors;default   [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

Note :

Serverurl=unix:///var/run/supervisor/supervisor.sock: This proposal does not modify

Nodaemon=true: Set to True

command=/usr/local/tools/tomcat7_8080/bin/catalina.sh Run: This must be written (Supervisor Management Tomcat must boot like this, Other ways seem to have problems ), refer to:http://serverfault.com/questions/425132/controlling-tomcat-with-supervisor

To create a mirror:

[email protected] shencj]# Docker build-t shencj/centos-ssh-tomcat:v1.

To run the container:

[email protected] shencj]# Docker run-d--name ssh-tomcat--restart=always-p 4426:22-p 82:8080 SHENCJ/CENTOS-SSH-TOMCA T:v1cc8006c07f6c703c476c69ecc3699f0c9a1e5f456949e65a8e92b55dafa8be1e[[email protected] shencj]#

To view containers:     

[[email protected] shencj]# docker ps -acontainer id         IMAGE                          COMMAND                   CREATED              STATUS               PORTS                                          NAMEScc8006c07f6c         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

Login Container:

[[email protected] shencj]# ssh localhost -p 4426[email protected] ' s  password: [[email protected] ~]# ps -ef uid          PID   PPID  C STIME TTY           time cmdroot          1       0  0 03:56 ?         00:00:00 /usr/bin/python /usr/bin/supervisord -c /etc/supervisor/ supervisord.confroot          7       1  0 03:56 ?        00:00:00 /usr /sbin/sshd -droot          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.aparoot         30       7  0 03:58 ?         00:00:00 sshd: [email protected]/0root         32      30  0 03:58 pts/0    00:00:00 - Bashroot         45     32  0  03:58 pts/0    00:00:00 ps -ef[[email protected] ~]#  supervisorctl statussshd                              running   pid 7, uptime 0:02:58tomcat                             running   pid 8, uptime 0:02:58




Access Tomcat:

http://ip:82

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This article is from the "See" blog, please be sure to keep this source http://732233048.blog.51cto.com/9323668/1861018

Docker uses supervisor to manage multiple processes