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Supervisor process management tool detects process survival status at all times; can be used to start, restart and close processes;

Supervisor (supervisor is a C/S model program, this is the server side, corresponding to the client side: supervisor ctl) and applications (that is, we want to manage the program).

I. Download:

https://pypi.python.org/packages/80/37/964c0d53cbd328796b1aeb7abea4c0f7b0e8c7197ea9b0b9967b7d004def/supervisor-3.3.1.tar.gz#md5=202f760f9bf4930ec06557bac73e5cf2

# cd supervisor

# python setup.py build

Tips for installing meld3 version requirements who are above 0.6.5;

Searching for meld3>=0.6.5

https://pypi.python.org/packages/45/a0/317c6422b26c12fe0161e936fc35f36552069ba8e6f7ecbd99bbffe32a5f/meld3-1.0.2.tar.gz#md5=3ccc78cd79cffd63a751ad7684c02c91

# cd meld3

# python setup.py install

# cd supervisor

# python setup.py install

Detection;

>>> import supervisor Check to see if it loads successfully.

Yum install supervisor

Start;

supervisord -c /etc/supervisord.conf

If you modify the configuration file

You need to reload the configuration;

supervisorctl reload

Supervisord.conf example;

[unix_http_server]

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

;chmod=0700 ; mode of socket file, default is 0700

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

;[inet_http_server] ; HTTP server, providing web administration interface

;port=127.0.0.1:9001 ; IP and port running in the background of Web management. If it is open to the public network, you need to pay attention to security.

;username=user ; login administrator username

;password=123 ; login password for admin background

[supervisord]

logfile=/tmp/supervisord.log ; log file, default is $CWD/supervisord.log

logfile_maxbytes=50MB ; log file size, exceeding will rotate, default 50MB

logfile_backups=10 ; number of logfile backups retained Default 10

loglevel=info ; log level, default info, others: debug,warn,trace

pidfile=/tmp/supervisord.pid; pid file

nodaemon=false ; Whether to start in the foreground, the default is false, that is, start as a daemon

minfds=1024 ; Minimum file descriptor that can be opened, default 1024

minprocs=200 ; Minimum number of processes that can be opened, default 200

[rpcinterface:supervisor]

supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface

[supervisorctl]

serverurl=unix://tmp/supervisor.sock ; Connect supervisor via UNIX socket, path is same as file in unix_http_server section

;serverurl=http://127.0.0.1:9001 ; connect to supervisor via HTTP

/etc/supervisor/can be used to store these configuration files, and accordingly, modify the configuration of the include part in/etc/supervisor.conf:

[include]

files = /etc/supervisor/*.conf

IV. Example of program configuration

[program:redis]

directory = /data/redis ; program startup directory

command = ./ redis-server redis.conf ; start command, you can see that the command is the same as manually starting it on the command line

autostart = true ; also starts automatically when supervisor starts

startsecs = 5 ; If there is no abnormal exit after 5 seconds of startup, it is deemed to have started normally.

autostart = true ; Automatic restart after abnormal program exit

startretries = 3 ; number of automatic retries for startup failure, default is 3

user = leon ; with which user to start

redirect_stderr = true ; redirect stderr to stdout, default false

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

stdout_logfile_backups = 20 ; stdout log file backups

; stdout log file, note that when the specified directory does not exist, it cannot be started normally, so it is necessary to manually create the directory (supervisor will automatically create the log file)

stdout_logfile = /data/supervisor/logs/redis_stdout.log

startup;(points to configuration startup)

supervisorctl -c /etc/supervisord.conf

Execute supervisorctl to view status;

> status #View program status

Or write a detection process to determine the start can also be

# cat start.sh

src/redis-server conf/redis.conf

# cat check_redis.sh

#!/ bin/bash

redis=$(ps -C redis --no-heading|wc -l)

if [ "${redis}" = "0" ]; then

sh start.sh

fi

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