解釋一些讓人容易疑惑名詞：

supervisor：要安裝的軟體的名稱。
supervisord：裝好supervisor軟體後，supervisord用於啟動supervisor服務。
supervisorctl：用於管理supervisor配置檔案中program。

方法一、使用yum命令安裝（推薦）

# sudo su - #切換為root使用者

# yum install epel-release
# yum install -y supervisor
# systemctl enable supervisord # 開機自啟動
# systemctl start supervisord # 啟動supervisord服務
 


# systemctl status supervisord # 檢視supervisord服務狀態
# ps -ef|grep supervisord # 檢視是否存在supervisord程序

方法二、使用pip手工安裝配置(不推薦)

準備工作

確認9001埠未被佔用，如果9001埠被佔用，請將後面提到的supervisord.conf檔案中的9001替換為可用埠號，如7001。

一、安裝supervisor

切換為root使用者

$ sudo su -

為python2.7安裝pip（supervisor只支援python2.7）
(1) 下載pip

# wget https://bootstrap.pypa.io/get-pip.py --no-check-certificate
 

(2) 安裝pip

# python2.7 get-pip.py
如果遇到psutil相關的報錯，參考https://www.cnblogs.com/chentq/p/4954135.html

安裝supervisor

# pip2 install supervisor

# #可能遇到的問題及解決辦法：
# #如果遇到NameError: name 'sys_platform' is not defined 
# #執行如下命令即可（但是也會報錯，不用理會）
# #pip2 install --upgrade distribute,
# #然後再解除安裝supervisor，
# #pip2 uninstall supervisor，
 

# #重灌supervisor,
# #pip2 install supervisor。
# #參考http://www.yuchaoshui.com/post/CentOS6-Python-installation

建立supervisor所需目錄

# mkdir /etc/supervisord.d/

建立supervisor配置檔案

# echo_supervisord_conf > /etc/supervisord.conf

編輯supervisord.conf檔案

# vim /etc/supervisord.conf

檔案內容如下(直接展示完整的檔案內容，建議直接複製貼上，如果想知道詳細改動，可逐行對比)

; 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 ".

[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)

[inet_http_server]         ; inet (TCP) server disabled by default
port=127.0.0.1:9001        ; 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/supervisord.log ; main log file; default $CWD/supervisord.log
logfile_maxbytes=50MB        ; max main logfile bytes b4 rotation; default 50MB
logfile_backups=10           ; # of main logfile backups; 0 means none, 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 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=0,2                 ; '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 (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)
;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)
;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=0,2                 ; '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 (0 means none, 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 (0 means none, 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 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/supervisord.d/*.ini

儲存退出

Esc:x

啟動supervisor

# supervisord -c /etc/supervisord.conf

檢視supervisor是否啟動成功

# ps -ef|grep supervisord
root       932     1  0 May10 ?        00:00:09 /bin/python2.7 /bin/supervisord -c /etc/supervisord.conf
root      7902  6814  0 10:29 pts/0    00:00:00 grep --color=auto supervisord

至此，安裝supervisor就結束了

二、將supervisor配置為開機自啟動服務

編輯服務檔案

# vim /usr/lib/systemd/system/supervisord.service

內容如下

[Unit]
Description=Supervisor daemon

[Service]
Type=forking
PIDFile=/var/run/supervisord.pid
ExecStart=/bin/supervisord -c /etc/supervisord.conf
ExecStop=/bin/supervisorctl shutdown
ExecReload=/bin/supervisorctl reload
KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target

儲存退出

Esc:x

啟動服務

# systemctl enable supervisord

檢視是否啟動

# systemctl is-enabled supervisord
enabled

成功之後，就可以使用如下命令管理supervisor服務了

# systemctl stop supervisord
# systemctl start supervisord
# systemctl status supervisord
# systemctl reload supervisord
# systemctl restart supervisord

至此，安裝supervisor和配置為supervisor服務的工作就完成了。

補充：

1. 因為我們的supervisor使用的是root安裝，所以，對於非root使用者，如果在執行

 $ supervisord -c /etc/supervisord.conf 
 $ supervisorctl

命令時，會遇到訪問被拒（Permission denied）的問題。
在命令最前面加上sudo即可
2. 如果更改了/etc/supervisord.conf中的埠號，原來的簡寫命令

# supervisorctl

就需要在後面指定supervsor配置檔案位置，或指定supervisor服務執行的埠號

# supervisorctl -c /etc/supervisord.conf 
# supervisorctl -s http://localhost:7001

否則會報連線拒絕

# supervisorctl 
http://localhost:9001 refused connection
supervisor>