how to write a linux service to start a service on computer A after a service in computer B is up and running?(computer A and B are in same network)

Question

in my senario I have an linux service on computer that need to run after a service in computer B(computer A and B are in same network).how can I use system.d to do this job?

Answer 1

There are several solutions to this scenario, the simplest solution is to write a bash script like bellow. before that you should set ssh-key between 2 linux computer.

at first open a file.

   nano /usr/bin/script.sh 

and Put the following line in it.

#!/bin/bash
ssh root@computerA  'systemctl start YOURServicName'

now you need to run this bash Script as SystemD Service in computer B.

[Unit]
Description=My Shell Script

[Service]
ExecStart=/usr/bin/script.sh

[Install]
WantedBy=multi-user.target

for more info use this link.

Finally You need to add this line in your B.service file:

After=A.service

I hope my explanation was useful.