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How To Install and configure daemon for supervisor on CentOS7

To Install and configure daemon for supervisor on CentOS7

Supervisor is a client/server process control system that allows its users to monitor and control a number of processes on Linux and other UNIX-like operating systems.   Supervisor will mange your process to live all time. It is so simple to install Supervisor, and this article covers the method to install and configure Supervisor on CentOS7

 

Installing   Daemon

It is really very essential to install the dependency python package in your system before you actually install   the supervisor.  

[root@linuxhelp ~]#  yum -y install python-setuptools python-pip
BDB2053 Freeing read locks for locker 0x504: 2881/140415299045184
BDB2053 Freeing read locks for locker 0x506: 2881/140415299045184
Loaded plugins: fastestmirror, langpacks  
Loading mirror speeds from cached hostfile
* base: centos.excellmedia.net
* extras: centos.excellmedia.net
* updates: centos.excellmedia.net
Package python-setuptools-0.9.8-7.el7.noarch already installed and latest version
Nothing to do

 

After that, you shall proceed with the installation of Supervisor and for that, you need to run the following command.

[root@linuxhelp ~]# easy_install supervisor
Searching for supervisor
Reading https://pypi.python.org/simple/supervisor/
Best match: supervisor 3.3.3
Downloading https://pypi.python.org/packages/31/7e/788fc6566211e77c395ea272058eb71299c65cc5e55b6214d479c6c2ec9a/supervisor-3.3.3.tar.gz#md5=0fe86dfec4e5c5d98324d24c4cf944bd
Processing supervisor-3.3.3.tar.gz
Writing /tmp/easy_install-rpPGqZ/supervisor-3.3.3/setup.cfg
Running supervisor-3.3.3/setup.py -q bdist_egg --dist-dir /tmp/easy_install-rpPGqZ/supervisor-3.3.3/egg-dist-tmp-F9eOtC
warning: no previously-included files matching ' *'  found under directory ' docs/.build' 
Adding supervisor 3.3.3 to easy-install.pth file
Installing echo_supervisord_conf script to /usr/bin
Installing pidproxy script to /usr/bin
Installing supervisorctl script to /usr/bin
Installing supervisord script to /usr/bin
Installed /usr/lib/python2.7/site-packages/supervisor-3.3.3-py2.7.egg
Processing dependencies for supervisor
Searching for meld3> =0.6.5
Reading https://pypi.python.org/simple/meld3/
Best match: meld3 1.0.2
Downloading https://pypi.python.org/packages/45/a0/317c6422b26c12fe0161e936fc35f36552069ba8e6f7ecbd99bbffe32a5f/meld3-1.0.2.tar.gz#md5=3ccc78cd79cffd63a751ad7684c02c91
Processing meld3-1.0.2.tar.gz
Writing /tmp/easy_install-OIgs1p/meld3-1.0.2/setup.cfg
Running meld3-1.0.2/setup.py -q bdist_egg --dist-dir /tmp/easy_install-OIgs1p/meld3-1.0.2/egg-dist-tmp-5t_61u
zip_safe flag not set  analyzing archive contents...
Adding meld3 1.0.2 to easy-install.pth file
Installed /usr/lib/python2.7/site-packages/meld3-1.0.2-py2.7.egg
Finished processing dependencies for supervisor

 

Once it is installed, you shall check the version of Supervisor which you have just installed.  

[root@linuxhelp ~]# supervisord -version
3.3.3


Later, you need to copy the configuration file from echo_supervisord_conf   to /etc/ supervisord.conf, and for that purpose, you shall run the following command.  

[root@linuxhelp ~]# echo_supervisord_conf  >  /etc/supervisord.conf

 

You should now create a new file in systemd location for daemon configuration. Do that through the vim editor as follows.  

[root@linuxhelp ~]# vim /usr/lib/systemd/system/supervisord.service

 

In that file, you need to add the following lines.

[Unit]                                                              
 Description=supervisord - Supervisor process control system for UNIX
 Documentation=http://supervisord.org                                
 After=network.target                                                
 [Service]
 User=user1                                                           
 Type=forking                                                        
 ExecStart=/usr/bin/supervisord -c /etc/supervisord.conf             
 ExecReload=/usr/bin/supervisorctl reload                            
 ExecStop=/usr/bin/supervisorctl shutdown                            
 [Install]                                                           
 WantedBy=multi-user.target


After the configuration, you need to reload the    daemon as follows.  

[root@linuxhelp ~]# systemctl daemon-reload


And then, enable supervisor with the help of the following command.  

[root@linuxhelp ~]# systemctl enable supervisord
Created symlink from /etc/systemd/system/multi-user.target.wants/supervisord.service to /usr/lib/systemd/system/supervisord.service.


Later, you should start supervisor sevice, and for that you need to run the following command.  

[root@linuxhelp ~]# systemctl start supervisord.service

 

You shall now check the status for supervisor.

[root@linuxhelp ~]# systemctl status supervisord.service
● supervisord.service - Process Monitoring and Control Daemon
   Loaded: loaded (/usr/lib/systemd/system/supervisord.service  disabled  vendor preset: disabled)
   Active: active (running) since Fri 2017-12-22 07:23:47 EST  7s ago
  Process: 2999 ExecStart=/usr/bin/supervisord -c /etc/supervisord.conf (code=exited, status=0/SUCCESS)
 Main PID: 3000 (supervisord)
   CGroup: /system.slice/supervisord.service
           └─3000 /usr/bin/python /usr/bin/supervisord -c /etc/supervisord.co...
Dec 22 07:23:47 linuxhelp.com systemd[1]: Starting Process Monitoring and Co....
Dec 22 07:23:47 linuxhelp.com systemd[1]: Started Process Monitoring and Con....
Hint: Some lines were ellipsized, use -l to show in full.

With this, the installation and configuration of daemon for Supervisor on  CentOS7 comes to an end. 

Tag : CentOS
FAQ
Q
To What Does Device Tolerance Refer in CPU Supervisors?
A
Device tolerance can be used to refer to two different device values. One value is the voltage at which the device recognizes that power is good. On Maxim devices, this value would generally be indicated simply as a percentage (for example, 5%). It would indicate that the device will trip just below the operating voltage minus 5%.
Q
How Do I Choose a Reset Threshold and Tolerance?
A
Generally speaking, the supervisory device's reset threshold should be set at or below the lowest power-supply output voltage. For example, a 3.3V power supply rated at ±5% has a minimum output voltage of 3.135V. The appropriate supervisory reset threshold should have a maximum voltage of 3.135V or less. A supervisory device with a 3.059V nominal reset threshold and a tolerance of 2.5% has a maximum threshold voltage of 3.135V, which is ideal. In some cases, it is a good idea to choose a lower reset threshold to account for power-supply glitches or noise.
Q
What is Linux supervisor?
A
Supervisor: A Process Control System. A supervisor is a client/server system that allows its users to monitor and control a number of processes on UNIX-like operating systems.
Q
What are the main responsibilities of a supervisor?
A
Supervisor Responsibilities
Setting goals for performance and deadlines in ways that comply with the company's plans and vision.
Organizing workflow and ensuring that employees understand their duties or delegated tasks.
Monitoring employee productivity and providing constructive feedback and coaching.
Q
What is the daemon configuration location for centos6?
A
There it is init script you can create bash script by "/etc/init.d"