使用Supervisor管理Celery進程。

講過一篇celery的，可是celery啓動後並非daemon的，在生產環境中這確定是不能夠的，那怎麼辦呢？ 這就須要使用supervisor進行進程管理了，下面詳細介紹。

1、 supervisor是幹什麼的。

supervisor是有Python語言編寫的，基於linux操做系統的一款服務器管理工具，用以監控服務器進程的運行。
supervisor要求管理的程序是非daemon程序，supervisord會幫你把他轉換成daemon程序。
所以若是使用supervisor來管理nginx進程的話，必須在nginx的配置文件裏添加一行設置deamon off讓nginx以非daemon方式啓動, 咱們這裏是用supervisor是用它來管理celery進程。

2、supervisor安裝

1. 安裝好python環境,這個Linux系統都默認已經安裝好了，可是建議安裝2.7.0以上版本。 2. 使用pip或者easy_install安裝 sudo pip install supervisor 或者 sudo easy_install supervisor 安裝完之後，進入python交互式環境，輸入： import supervisor 若是沒有錯誤提示則表示安裝成功。

3、 supervisor配置

1. superisor配置生成 $ echo_supervidord_conf > /etc/supervisord.conf 2. 配置文件說明 $ sudo cp /etc/supervisord.conf /etc/suprtvidord.conf.bak # 首先備份一下配置文件 廢話很少說，直接貼配置文件(配置文件中以；開頭的行表示註釋)： ; 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] 這個模塊主要是配置sock文件的路徑及權限 [unix_http_server] file=/var/run/supervisor.sock ; (the path to the socket file) chmod=0700 ; socket file mode (default 0700) chown=root:root ; socket file uid:gid owner ;username=admin ; (default is no username (open server)) ;password=admin ; (default is no password (open server)) # [inet_http_server] 這個模塊只要是配置Web管理界面 [inet_http_server] ; inet (TCP) server disabled by default port=127.0.0.1:9001 ; (ip_address:port specifier, *:port for all iface) username=admin ; (default is no username (open server)) password=admin ; (default is no password (open server)) # [supervisord] 這個模塊是supervisord服務的配置模塊，好比日誌文件位置，日誌等級等等 [supervisord] logfile=/home/liuyadong/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] 這個模塊的值必須和"unix_http_server"裏面設定的匹配 [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=admin ; should be same as http_username if set ;password=admin ; 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:xxx] 這個模塊就是須要管理的進程模塊, 字段屬性也很簡單，後面有註釋就不詳細介紹了。 # 這個模塊能夠是多個 [program:celery] command=celery worker -A monitorAuto.celery --loglevel=info ; 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=/home/liuyadong/git/monitor_auto/ ; directory to cwd to before exec (def no cwd) autostart=true ; start at supervisord start (default: true) startsecs=10 ; # of secs prog must stay up to be running (def. 1) startretries=3 ; max # of serial start failures when starting (default 3) ;autorestart=ture ; 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=600 ; max num secs to wait b4 SIGKILL (default 10) ;stopasgroup=false ; send stop signal to the UNIX process group (default false) killasgroup=true ; SIGKILL the UNIX process group (def false) user=liuyadong ; setuid to this UNIX account to run the program redirect_stderr=true ; redirect proc stderr to stdout (default false) stdout_logfile=/home/liuyadong/log/supervisor/supercelery.log ; 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=/home/liuyadong/log/supervisor/supercelery.error.log ; 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. ;[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

4、 Supervisord管理 Supervidord安裝完成之後有兩個可用的命令行supervisor和supervisorctl

? supervisord，                     初始啓動Supervisord，啓動、管理配置中設置的進程。
 ? supervisorctl stop programxxx 中止某一個進程(programxxx)，programxxx爲[program:chatdemon]裏配置的值，這個示例就是chatdemon。 ? supervisorctl start programxxx 啓動某個進程 ? supervisorctl restart programxxx 重啓某個進程 ? supervisorctl stop groupworker 重啓全部屬於名爲groupworker這個分組的進程(start,restart同理) ? supervisorctl stop all 中止所有進程，注：start、restart、stop都不會載入最新的配置文件。 ? supervisorctl reload 載入最新的配置文件，中止原有進程並按新的配置啓動、管理全部進程。 ? supervisorctl update 根據最新的配置文件，啓動新配置或有改動的進程，配置沒有改動的進程不會受影響而重啓。 注意：顯示用stop中止掉的進程，用reload或者update都不會自動重啓。 可使用--help查看命令更多的用法，我啓動時遇到配置文件沒有放到默認路徑使用-c 參數執行