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This article mainly explains how to install and configure Linux process management tool supervisor, the content is clear, interested partners can learn, I believe it will be helpful after reading.

Environment: CentOS 7

Installation

# yum install-y epel-release

# yum install-y supervisor

Start

# supervisord-c / etc/supervisord.conf

# ps-ef | grep supervisor

Root 19703 1 0 17:32? 00:00:00 / usr/bin/python / usr/bin/supervisord-c / etc/supervisord.conf

Root 19715 19495 0 17:32 pts/0 00:00:00 grep-color=auto supervisor

Configuration description

Configuration file address: / etc/supervisor.conf

If there is no configuration file, you can generate it with the following command:

Echo_supervisord_conf > / etc/supervisord.conf

Detailed description of the profile:

[unix_http_server]

File=/tmp/supervisor.sock; UNIX socket file, supervisorctl will use the

; chmod=0700; mode of socket file. Default is 0700.

; chown=nobody:nogroup; owner of the socket file, format: uid:gid

; [inet_http_server]; HTTP server, which provides web management interface

; port=127.0.0.1:9001; Web manages the IP and ports running at the backend. If it is open to the public network, you need to pay attention to security.

; username=user; login to the user name of the administrative backend

; password=123; password for logging in to the administrative backend

[supervisord]

Logfile=/tmp/supervisord.log; log file. Default is $CWD/supervisord.log.

Logfile_maxbytes=50MB; log file size, which exceeds rotate. Default is 50MB. If set to 0, there is no limit on the size.

Logfile_backups=10; the number of reserved backups for log files is 10 by default, and 0 means no backups

Loglevel=info; log level, default info, other: debug,warn,trace

Pidfile=/tmp/supervisord.pid; pid file

Nodaemon=false; whether to start in the foreground. The default is false, that is, it starts in the way of daemon.

Minfds=1024; the minimum value of the file descriptor that can be opened. Default is 1024.

Minprocs=200; the minimum number of processes that can be opened. Default is 200.

[supervisorctl]

Serverurl=unix:///tmp/supervisor.sock; connect to supervisord through UNIX socket, and the path is the same as that of file in unix_http_server

; serverurl= http://127.0.0.1:9001; connect to supervisord through HTTP

; [program:xx] is the configuration parameter of the managed process, and xx is the name of the process

[program:xx]

Command=/opt/apache-tomcat-8.0.35/bin/catalina.sh run; program startup command

Autostart=true; also starts automatically when supervisord starts

Startsecs=10; if there is no abnormal exit after 10 seconds, it means that the process has started normally. The default is 1 second.

Autorestart=true; restarts automatically after the program exits. Available value: [unexpected,true,false]. Default is unexpected, which means the process will not restart until it is killed unexpectedly.

Startretries=3; automatic retry number of failed startup. Default is 3.

User=tomcat; which user to start the process with? default is root.

Priority=999; process startup priority. Default is 999, and those with small values start first.

Redirect_stderr=true; redirect stderr to stdout, default false

Stdout_logfile_maxbytes=20MB; stdout log file size, default 50MB

Stdout_logfile_backups = 20; number of stdout log file backups. Default is 10.

; stdout log file, it should be noted that it cannot be started normally when the specified directory does not exist, so you need to create a directory manually (supervisord will automatically create log files)

Stdout_logfile=/opt/apache-tomcat-8.0.35/logs/catalina.out

Stopasgroup=false; default is false. Whether to send stop signals to the process group, including child processes, when the process is killed

Killasgroup=false; defaults to false, which sends kill signals to the process group, including child processes

; contains other configuration files

[include]

Files = supervisord.d/*.ini; you can specify one or more configuration files that end with .ini

Configure Tomcat Test

/ etc/supervisord.d/tomcat.ini

[program:tomcat]

Command=/opt/apache-tomcat-8.0.44/bin/catalina.sh run

Stdout_logfile=/opt/apache-tomcat-8.0.44/logs/catalina.out

Autostart=true

Autorestart=true

Startsecs=5

Priority=1

Stopasgroup=true

Killasgroup=true

Restart supervisor

Supervisord-c / etc/supervisord.conf

View

[root@gr5bm1tynui4toof-0622769 system] # supervisorctl

Tomcat RUNNING pid 21609, uptime 0:25:15

After reading the above, do you have a further understanding of how to install and configure Linux process management tool supervisor? if you want to learn more, you are welcome to follow the industry information channel.

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