brief introduction
Supervisor is a C/S system. It can control the process on UNIX-like system. It is written by python. It provides a lot of functions to manage the process.
install
sudo pip install supervisor- 1
To configure
After installing the supervisor, you can use the "echo_supervisord_conf" command to generate the sample configuration file
echo_supervisord_conf- 1
The default supervisor uses / etc/supervisord.conf as the default configuration file.
Startup service
Service procedure
First, write a small program to simulate a service program, as follows.
myserver.sh
#!/bin/sh
while true
do
date
sleep 5
done- 1
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To configure
Modify the configuration file / etc/supervisord.conf as follows
[supervisord]
nodaemon=true
[program:myserver]
command=/home/kongxx/test/myserver.sh- 1
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Startup service
supervisord -c /etc/supervisord.conf
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Running the above program will start the supervisor service, which will generate a log file supervisord.log in the current directory.
At this point, we use "ps-ef | grep myserver" to find the service process above, and then kill the process. At this point, you will see that the supervisor in the log will start a new Myserver process.
management service
For the example above, we can only start a service, but can not manage these configurations of services. Let's see how to manage services.
Service procedure
Or use the myserver.sh program above.
To configure
/etc/supervisord.conf
[inet_http_server] ; inet (TCP) server disabled by default
port = *:9999 ; (ip_address:port specifier, *:port for all iface)
username = admin ; (default is no username (open server))
password = Letmein ; (default is no password (open server))
[supervisord]
nodaemon = false
[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
[supervisorctl]
serverurl = http://127.0.0.1:9999 ; use an http:// url to specify an inet socket
username = admin ; should be same as http_username if set
password = Letmein ; should be same as http_password if set
prompt = mysupervisor ; cmd line prompt (default "supervisor")
[program:myserver]
command = /home/kongxx/test/myserver.sh
redirect_stderr = true
stdout_logfile = /tmp/myserver.log
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Startup service
supervisord -c /etc/supervisord.conf
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Query/Start/Stop Services
$ supervisorctl status myserver
myserver RUNNING pid 14034, uptime 0:00:03
$ supervisorctl start myserver
$ supervisorctl stop myserver- 1
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supervisor manages the command line
supervisorctl can also enter supervisor's management command line interface without any parameters, as follows:
$ supervisorctl
myserver RUNNING pid 15297, uptime 0:00:27
mysupervisor> ?
default commands (type help <topic>):
=====================================
add exit open reload restart start tail
avail fg pid remove shutdown status update
clear maintail quit reread signal stop version
mysupervisor> - 1
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Remote management
supervisorctl -s http://<ip>:9999 -u admin -p Letmein status myserver- 1
Web interface
Browsers can be used to access http://:9999 to manage services through web interfaces.