CentOS 7 - why the service file is not working to run my bash script?

Question

How to make my bash script as service in CentOS 7? following is failing.

$ cat /etc/systemd/system/mybash.service
[Unit]
Description=mybash Service
After=network.target

[Service]
Type=simple
User=root
ExecStart=/root/runme.sh
Restart=on-abort

[Install]
WantedBy=multi-user.target

$ systemctl start mybash
$ systemctl status mybash -l
mybash.service - mybash Service
   Loaded: loaded (/etc/systemd/system/mybash.service; disabled)
   Active: inactive (dead)
.....

$ cat /root/runme.sh 
#!/bin/bash
echo "Start the node server"
a=$(pgrep -f "a.js");
kill $a;
a=$(pgrep -f "b.js");
kill $a;
node /home/www/html/a.js &
node /home/www/html/b.js &

score 4 · Accepted Answer · edited Apr 13 '17 at 12:37

Do it properly.

Don't use forever under service managers. They already do this.
Don't use pgrep and kill under service managers. They do this better.
Don't use start-stop-daemon under service managers. They do this better.

That entire mechanism with that shell script is wrongheaded to start with, and fixing its readiness protocol mismatch would be simply papering over some vast cracks. You don't need any of that entire cobbled-together-poor-imitation-of-daemon-management script at all. You have a service manager that can do that stuff directly and safely. Use it.

# /etc/systemd/system/node@.service
[Unit]
Description=node service for %i.js
Documentation=https://unix.stackexchange.com/questions/207658/
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/bin/node /home/www/html/%i.js
Restart=on-abort
SyslogIdentifier=node-%i

[Install]
WantedBy=multi-user.target

Fix the path to /usr/local/bin/node as appropriate. The usual commands then apply:

systemctl preset node@a.service node@b.service
systemctl start node@a.service node@b.service
systemctl status node@a.service node@b.service

CentOS 7 - why the service file is not working to run my bash script?

1 Answers1

Do it properly.

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