Supervisord进程管家
Supervisord是一个守护进程的工具，当进程意外终止或服务器掉电起来后，希望进程能够自动运行，supervisord可以很好的为我们做这件事情。同时supervisord也自带监控界面，可以通过浏览器灵活的查看、操作。
以安徽storm快数据系统为例，20台服务器总计268个进程（不包括CDH hadoop集群进程），全部由supervisord接管。
1） 首先安装meld3和supervisor：
下载地址
https://pypi.python.org/pypi/meld3
https://pypi.python.org/pypi/supervisor
tar xfz meld3-1.0.2.tar.gz
cd meld3-1.0.2
python setup.py install
python setup.py install安装报错
[root@localhost meld3-1.0.2]# python setup.py install
Traceback (most recent call last):
File "setup.py", line 1, in ?
from setuptools import setup
ImportError: No module named setuptools
解决办法
http://pypi.python.org/packages/source/s/setuptools/setuptools-0.6c11.tar.gz
tar zxvf setuptools-0.6c11.tar.gz
cd setuptools-0.6c11
python setup.py build
python setup.py install
tar xfz supervisor-3.2.3.tar.gz
cd supervisor-3.2.3
python setup.py install
2）生成配置文件：
echo_supervisord_conf > /etc/supervisord.conf
3）修改配置文件，并在末尾添加app守护：
vi /etc/supervisord.conf
末尾添加app信息：
[program:storm_nimbus]
user=inas
autorestart=true
directory=/home/inas/storm/bin
command=/home/inas/storm/bin/storm nimbus
[program:storm_ui]
user=inas
autorestart=true
directory=/home/inas/storm/bin
command=/home/inas/storm/bin/storm ui
[program:storm_supervisor]
user=inas
autorestart=true
directory=/home/inas/storm/bin
command=/home/inas/storm/bin/storm supervisor
附录/etc/supervisord.conf （安徽样例）
4）添加自启动服务脚本：
vi /etc/init.d/supervisord
详见附录/etc/init.d/supervisord
5）生成日志目录并添加到服务里：
mkdir -p /var/log/supervisor
chmod +x /etc/init.d/supervisord
chkconfig --add supervisord
chkconfig --list supervisord
6）相关命令：
service supervisord start|stop|status|reload|restart
supervisorctl status
supervisorctl start xxx
supervisorctl stop xxx
supervisorctl update
7）监控页面（如需要安全性，也可以设置账号）：
8）FAQ：
Q）由supervisord守护的进程条件？
A）启动命令中不能包含daemon或&后台符来运行即可。
Q）如果/etc/supervisord.conf里新增加了app，需要重启supervisord？
A）可以通过service supervisord restart来重启所有app;
也可以通过supervisorctl update命令来运行新增的app，而原有未改动的app不受影响。
附录1：
/etc/supervisord.conf文件样例：
; Sample supervisor config file.
;
; For more information on the config file, please see:
; http://supervisord.org/configuration.html
;
; Notes:
; - Shell expansion ("~" or "$HOME") is not supported. Environment
; variables can be expanded using this syntax: "%(ENV_HOME)s".
; - Comments must have a leading space: "a=b ;comment" not "a=b;comment".
[unix_http_server]
file=/tmp/supervisor.sock ; (the path to the socket file)
;chmod=0700 ; socket file mode (default 0700)
;chown=nobody:nogroup ; socket file uid:gid owner
;username=user ; (default is no username (open server))
;password=123 ; (default is no password (open server))
[inet_http_server] ; inet (TCP) server disabled by default
port=0.0.0.0:9001 ; (ip_address:port specifier, *:port for all iface)
;username=user ; (default is no username (open server))
;password=123 ; (default is no password (open server))
[supervisord]
logfile=/var/log/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/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)
;umask=022 ; (process file creation umask;default 022)
;user=chrism ; (default is current user, required if root)
;identifier=supervisor ; (supervisord identifier, default is 'supervisor')
;directory=/tmp ; (default is not to cd during start)
;nocleanup=true ; (don't clean up tempfiles at start;default false)
;childlogdir=/tmp ; ('AUTO' child log dir, default $TEMP)
;environment=KEY="value" ; (key value pairs to add to environment)
;strip_ansi=false ; (strip ansi escape codes in logs; def. false)
; the below section must remain in the config file for RPC
; (supervisorctl/web interface) to work, additional interfaces may be
; added by defining them in separate rpcinterface: sections
[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
[supervisorctl]
serverurl=unix:///tmp/supervisor.sock ; use a unix:// URL for a unix socket
;serverurl=http://127.0.0.1:9001 ; use an http:// url to specify an inet socket
;username=chris ; should be same as http_username if set
;password=123 ; should be same as http_password if set
;prompt=mysupervisor ; cmd line prompt (default "supervisor")
;history_file=~/.sc_history ; use readline history if available
; The below sample program section shows all possible program subsection values,
; create one or more 'real' program: sections to be able to control them under
; supervisor.
;[program:theprogramname]
;command=/bin/cat ; the program (relative uses PATH, can take args)
;process_name=%(program_name)s ; process_name expr (default %(program_name)s)
;numprocs=1 ; number of processes copies to start (def 1)
;directory=/tmp ; directory to cwd to before exec (def no cwd)
;umask=022 ; umask for process (default None)
;priority=999 ; the relative start priority (default 999)
;autostart=true ; start at supervisord start (default: true)
;startsecs=1 ; # of secs prog must stay up to be running (def. 1)
;startretries=3 ; max # of serial start failures when starting (default 3)
;autorestart=unexpected ; when to restart if exited after running (def: unexpected)
;exitcodes=0,2 ; 'expected' exit codes used with autorestart (default 0,2)
;stopsignal=QUIT ; signal used to kill process (default TERM)
;stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
;stopasgroup=false ; send stop signal to the UNIX process group (default false)
;killasgroup=false ; SIGKILL the UNIX process group (def false)
;user=chrism ; setuid to this UNIX account to run the program
;redirect_stderr=true ; redirect proc stderr to stdout (default false)
;stdout_logfile=/a/path ; stdout log path, NONE for none; default AUTO
;stdout_logfile_maxbytes=1MB ; max # logfile bytes b4 rotation (default 50MB)
;stdout_logfile_backups=10 ; # of stdout logfile backups (default 10)
;stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
;stdout_events_enabled=false ; emit events on stdout writes (default false)
;stderr_logfile=/a/path ; stderr log path, NONE for none; default AUTO
;stderr_logfile_maxbytes=1MB ; max # logfile bytes b4 rotation (default 50MB)
;stderr_logfile_backups=10 ; # of stderr logfile backups (default 10)
;stderr_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
;stderr_events_enabled=false ; emit events on stderr writes (default false)
;environment=A="1",B="2" ; process environment additions (def no adds)
;serverurl=AUTO ; override serverurl computation (childutils)
; The below sample eventlistener section shows all possible
; eventlistener subsection values, create one or more 'real'
; eventlistener: sections to be able to handle event notifications
; sent by supervisor.
;[eventlistener:theeventlistenername]
;command=/bin/eventlistener ; the program (relative uses PATH, can take args)
;process_name=%(program_name)s ; process_name expr (default %(program_name)s)
;numprocs=1 ; number of processes copies to start (def 1)
;events=EVENT ; event notif. types to subscribe to (req'd)
;buffer_size=10 ; event buffer queue size (default 10)
;directory=/tmp ; directory to cwd to before exec (def no cwd)
;umask=022 ; umask for process (default None)
;priority=-1 ; the relative start priority (default -1)
;autostart=true ; start at supervisord start (default: true)
;startsecs=1 ; # of secs prog must stay up to be running (def. 1)
;startretries=3 ; max # of serial start failures when starting (default 3)
;autorestart=unexpected ; autorestart if exited after running (def: unexpected)
;exitcodes=0,2 ; 'expected' exit codes used with autorestart (default 0,2)
;stopsignal=QUIT ; signal used to kill process (default TERM)
;stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
;stopasgroup=false ; send stop signal to the UNIX process group (default false)
;killasgroup=false ; SIGKILL the UNIX process group (def false)
;user=chrism ; setuid to this UNIX account to run the program
;redirect_stderr=false ; redirect_stderr=true is not allowed for eventlisteners
;stdout_logfile=/a/path ; stdout log path, NONE for none; default AUTO
;stdout_logfile_maxbytes=1MB ; max # logfile bytes b4 rotation (default 50MB)
;stdout_logfile_backups=10 ; # of stdout logfile backups (default 10)
;stdout_events_enabled=false ; emit events on stdout writes (default false)
;stderr_logfile=/a/path ; stderr log path, NONE for none; default AUTO
;stderr_logfile_maxbytes=1MB ; max # logfile bytes b4 rotation (default 50MB)
;stderr_logfile_backups=10 ; # of stderr logfile backups (default 10)
;stderr_events_enabled=false ; emit events on stderr writes (default false)
;environment=A="1",B="2" ; process environment additions
;serverurl=AUTO ; override serverurl computation (childutils)
; The below sample group section shows all possible group values,
; create one or more 'real' group: sections to create "heterogeneous"
; process groups.
;[group:thegroupname]
;programs=progname1,progname2 ; each refers to 'x' in [program:x] definitions
;priority=999 ; the relative start priority (default 999)
; The [include] section can just contain the "files" setting. This
; setting can list multiple files (separated by whitespace or
; newlines). It can also contain wildcards. The filenames are
; interpreted as relative to this file. Included files *cannot*
; include files themselves.
;[include]
;files = relative/directory/*.ini
[program:zookeeper]
user=inas
autorestart=true
command=/usr/java/default/bin/java -Dzookeeper.log.dir=/home/inas/zookeeper-3.4.8/bin -Dzookeeper.root.logger=INFO,CONSOLE -cp /home/inas/zookeeper-3.4.8/build/classes:/home/inas/zookeeper-3.4.8/build/lib/*.jar:/home/inas/zookeeper-3.4.8/lib/slf4j-log4j12-1.6.1.jar:/home/inas/zookeeper-3.4.8/lib/slf4j-api-1.6.1.jar:/home/inas/zookeeper-3.4.8/lib/netty-3.7.0.Final.jar:/home/inas/zookeeper-3.4.8/lib/log4j-1.2.16.jar:/home/inas/zookeeper-3.4.8/lib/jline-0.9.94.jar:/home/inas/zookeeper-3.4.8/zookeeper-3.4.8.jar:/home/inas/zookeeper-3.4.8/src/java/lib/*.jar:/home/inas/zookeeper-3.4.8/conf:.:/usr/java/default/lib/dt.jar:/usr/java/default/lib/tools.jar: -Xms4096m -Xmx4096m -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=false org.apache.zookeeper.server.quorum.QuorumPeerMain /home/inas/zookeeper-3.4.8/conf/zoo.cfg
[program:storm_nimbus]
user=inas
autorestart=true
command=/home/inas/storm/bin/storm nimbus
[program:storm_ui]
user=inas
autorestart=true
command=/home/inas/storm/bin/storm ui
[program:storm_supervisor]
user=inas
autorestart=true
command=/home/inas/storm/bin/storm supervisor
[program:haproxy]
user=inas
autorestart=true
directory=/home/inas/haproxy
command=/home/inas/haproxy/haproxy -f haproxy_supervisord.cfg
[program:tomcat1]
user=inas
autorestart=true
directory=/home/inas/tomcat1/bin
command=/home/inas/tomcat1/bin/catalina.sh run
[program:tomcat2]
user=inas
autorestart=true
directory=/home/inas/tomcat2/bin
command=/home/inas/tomcat2/bin/catalina.sh run
附录2
/etc/init.d/supervisord 文件样例：
#!/bin/bash
#
# supervisord Startup script for the Supervisor process control system
#
# Author: Mike McGrath <mmcgrath@redhat.com> (based off yumupdatesd)
# Jason Koppe <jkoppe@indeed.com> adjusted to read sysconfig,
# use supervisord tools to start/stop, conditionally wait
# for child processes to shutdown, and startup later
# Erwan Queffelec <erwan.queffelec@gmail.com>
# make script LSB-compliant
#
# chkconfig: 345 83 04
# description: Supervisor is a client/server system that allows
# its users to monitor and control a number of processes on
# UNIX-like operating systems.
# processname: supervisord
# config: /etc/supervisord.conf
# config: /etc/sysconfig/supervisord
# pidfile: /var/run/supervisord.pid
#
### BEGIN INIT INFO
# Provides: supervisord
# Required-Start: $all
# Required-Stop: $all
# Short-Description: start and stop Supervisor process control system
# Description: Supervisor is a client/server system that allows
# its users to monitor and control a number of processes on
# UNIX-like operating systems.
### END INIT INFO
# Source function library
. /etc/rc.d/init.d/functions
# Source system settings
if [ -f /etc/sysconfig/supervisord ]; then
. /etc/sysconfig/supervisord
fi
# Path to the supervisorctl script, server binary,
# and short-form for messages.
supervisorctl=/usr/bin/supervisorctl
supervisord=${SUPERVISORD-/usr/bin/supervisord}
prog=supervisord
pidfile=${PIDFILE-/var/run/supervisord.pid}
lockfile=${LOCKFILE-/var/lock/subsys/supervisord}
STOP_TIMEOUT=${STOP_TIMEOUT-60}
OPTIONS="${OPTIONS--c /etc/supervisord.conf}"
RETVAL=0
start() {
echo -n $"Starting $prog: "
daemon --pidfile=${pidfile} $supervisord $OPTIONS
RETVAL=$?
echo
if [ $RETVAL -eq 0 ]; then
touch ${lockfile}
$supervisorctl $OPTIONS status
fi
return $RETVAL
}
stop() {
echo -n $"Stopping $prog: "
killproc -p ${pidfile} -d ${STOP_TIMEOUT} $supervisord
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -rf ${lockfile} ${pidfile}
}
reload() {
echo -n $"Reloading $prog: "
LSB=1 killproc -p $pidfile $supervisord -HUP
RETVAL=$?
echo
if [ $RETVAL -eq 7 ]; then
failure $"$prog reload"
else
$supervisorctl $OPTIONS status
fi
}
restart() {
stop
start
}
case "$1" in
start)
start
;;
stop)
stop
;;
status)
status -p ${pidfile} $supervisord
RETVAL=$?
[ $RETVAL -eq 0 ] && $supervisorctl $OPTIONS status
;;
restart)
restart
;;
condrestart|try-restart)
if status -p ${pidfile} $supervisord >&/dev/null; then
stop
start
fi
;;
force-reload|reload)
reload
;;
*)
echo $"Usage: $prog {start|stop|restart|condrestart|try-restart|force-reload|reload}"
RETVAL=2
esac
exit $RETVAL