进程守护Supervisor【系列一：安装与配置】

进程守护Supervisor

准备工作：
环境：

Centos 7 （Centos6.5不适合以下教程）

Python >= 2.7 (升级见：Python升级教程)

pip包管理工具安装（已安装可跳过）

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.pypython get-pip.py 

安装：

• 安装superviosr

pip install supervisor

• 配置配置文件

  // 创建配置目录mkdir -p /etc/supervisor/conf// 输出默认配置文件echo_supervisord_conf  >/etc/supervisor/supervisord.conf

  配置文件

# vim /etc/supervisor/supervisord.conf; 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".;  - Quotes around values are not supported, except in the case of;    the environment= options as shown below.;  - Comments must have a leading space: "a=b ;comment" not "a=b;comment".;  - Command will be truncated if it looks like a config file comment, e.g.;    "command=bash -c 'foo ; bar'" will truncate to "command=bash -c 'foo ".;; Warning:;  Paths throughout this example file use /tmp because it is available on most;  systems.  You will likely need to change these to locations more appropriate;  for your system.  Some systems periodically delete older files in /tmp.;  Notably, if the socket file defined in the [unix_http_server] section below;  is deleted, supervisorctl will be unable to connect to supervisord.[unix_http_server]file=/var/run/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); Security Warning:;  The inet HTTP server is not enabled by default.  The inet HTTP server is;  enabled by uncommenting the [inet_http_server] section below.  The inet;  HTTP server is intended for use within a trusted environment only.  It;  should only be bound to localhost or only accessible from within an;  isolated, trusted network.  The inet HTTP server does not support any;  form of encryption.  The inet HTTP server does not use authentication;  by default (see the username= and password= options to add authentication).;  Never expose the inet HTTP server to the public internet.[inet_http_server]                  ; inet (TCP) server disabled by defaultport=0.0.0.0:9001          ; ip_address:port specifier, *:port for all iface; username=hadoop                     ; default is no username (open server); password=******                ; default is no password (open server)[supervisord]logfile=/var/log/supervisord.log ; main log file; default $CWD/supervisord.loglogfile_maxbytes=50MB        ; max main logfile bytes b4 rotation; default 50MBlogfile_backups=10           ; # of main logfile backups; 0 means none, default 10loglevel=info                ; log level; default info; others: debug,warn,tracepidfile=/var/run/supervisord.pid ; supervisord pidfile; default supervisord.pidnodaemon=false               ; start in foreground if true; default falseminfds=1024                  ; min. avail startup file descriptors; default 1024minprocs=200                 ; min. avail process descriptors;default 200;umask=022                   ; process file creation umask; default 022;user=supervisord            ; setuid to this UNIX account at startup; recommended 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 rpcinterface:supervisor 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:x] sections.[rpcinterface:supervisor]supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface; The supervisorctl section configures how supervisorctl will connect to; supervisord.  configure it match the settings in either the unix_http_server; or inet_http_server section.[supervisorctl]serverurl=unix:///var/run/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 in [*_http_server] if set;password=123                ; should be same as in [*_http_server] if set;prompt=mysupervisor         ; cmd line prompt (default "supervisor");history_file=~/.sc_history  ; use readline history if available; The sample program section below 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                   ; 'expected' exit codes used with autorestart (default 0);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 (0 means none, default 10);stdout_capture_maxbytes=1MB   ; number of bytes in 'capturemode' (default 0);stdout_events_enabled=false   ; emit events on stdout writes (default false);stdout_syslog=false           ; send stdout to syslog with process name (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 (0 means none, default 10);stderr_capture_maxbytes=1MB   ; number of bytes in 'capturemode' (default 0);stderr_events_enabled=false   ; emit events on stderr writes (default false);stderr_syslog=false           ; send stderr to syslog with process name (default false);environment=A="1",B="2"       ; process environment additions (def no adds);serverurl=AUTO                ; override serverurl computation (childutils); The sample eventlistener section below shows all possible eventlistener; subsection values.  Create one or more 'real' eventlistener: sections to be; able to handle event notifications sent by supervisord.;[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                   ; 'expected' exit codes used with autorestart (default 0);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 (0 means none, default 10);stdout_events_enabled=false   ; emit events on stdout writes (default false);stdout_syslog=false           ; send stdout to syslog with process name (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 (0 means none, default 10);stderr_events_enabled=false   ; emit events on stderr writes (default false);stderr_syslog=false           ; send stderr to syslog with process name (default false);environment=A="1",B="2"       ; process environment additions;serverurl=AUTO                ; override serverurl computation (childutils); The sample group section below 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 = /etc/supervisor/conf/*.ini

• 配置开机启动

# vim /lib/systemd/system/supervisord.service[Unit]Description=Process Monitoring and Control DaemonAfter=rc-local.service[Service]Type=forkingExecStart=/usr/bin/supervisord -c /etc/supervisor/supervisord.confSysVStartPriority=99[Install]WantedBy=multi-user.target

• 添加启动服务

  systemctl enable supervisord.servicesystemctl start/restart/stop supervisord.service

• 增加自定义守护文件
  eg.新增服务配置文件

  # vim /etc/supervisor/conf/xdb.ini[program:xdb-service]command=/home/hadoop/anaconda3/envs/xdb/bin/python /data/service/xdb-service/app.pydirectory=/data/service/xdb-service/stdout_logfile=/data/service/xdb-service/log/supervisor.logstdout_logfile_maxbytes = 200MBautostart=truestartretries=10user=hadoop

  systemctl reload supervisord.service

启动：

root用户启动

###启动服务

supervisorctl start allsupervisorctl start service_name

###关闭服务

supervisorctl stop allsupervisorctl stop service_name

###查看状态

supervisorctl status [service_name]

###更新配置文件

supervisorctl update

###重新启动所有服务或者是某个服务

supervisorctl restart allsupervisorctl restart service_name