Difference between revisions of "Systemd service file"
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==Enable service-file== | ==Enable service-file== | ||
Enabling the service file makes it a part of '''systemd''' | Enabling the service file makes it a part of '''systemd''' | ||
| + | If it is a service and should be running all the time - do '''shutdown -r now''' and check with '''systemctl status myserverd-online''' that it is running | ||
<source lang=bash> | <source lang=bash> | ||
| − | sudo systemctl enable | + | sudo systemctl enable myserverd-online.service |
</source> | </source> | ||
| + | |||
==Need to know commands== | ==Need to know commands== | ||
<source lang=bash> | <source lang=bash> | ||
Revision as of 07:34, 17 April 2024
If i want a service daemon to log if my server is online every minute. The following procedure could be used:
Contents
My service
#!/bin/bash
# Filename: /usr/local/sbin/mysserver-online.sh
# Ownership: root:root
# Permissions: 755
IP="192.168.1.72"
LOGFILE="/tmp/myserver.log"
while :
do
if ping -c 1 $IP > /dev/null 2>&1
then
echo "$(date) online" >> $LOGFILE
else
echo "$(date) OFFLINE" >> $LOGFILE
fi
sleep 60
done
My service-file
# Filename: /lib/systemd/system/mysserver-onlined.service
# Owner: root:root
# Permissions: 644
[Unit]
Description=Test if my server online service
After=network.target
[Service]
ExecStart=/usr/local/sbin/mysserver-online.sh
Type=simple
Restart=always
[Install]
WantedBy=default.target
Enabling the service
Copy files to destination
Make sure your service and your service-file are in the right destination.
sudo cp myserver-online.sh /usr/local/sbin
sudo chown root:root /usr/local/sbin/myserver-online.sh
sudo chmod 755 /usr/local/sbin/myserver-online.sh
sudo cp myserver-onlined.service /lib/systemd/system
sudo chown root:root /lib/systemd/system/myserver-onlined.service
sudo chmod 644 /lib/systemd/system/myserver-onlined.service
Reload system file
systemd reloads and hopefully finds your new service-file
sudo systemctl daemon-reload
Verify files
systemd-analyze checks the service-file for errors. (Correct errors if any - remember to reload system files)
sudo systemd-analyze verify myserver-onlined.service
Enable service-file
Enabling the service file makes it a part of systemd If it is a service and should be running all the time - do shutdown -r now and check with systemctl status myserverd-online that it is running
sudo systemctl enable myserverd-online.service
Need to know commands
# Check the service status
sudo systemctl status myserver-online.service
# Start the service manually
sudo systemctl start myserver-online.service
# Stop the service manually
sudo systemctl stop myserver-online.service
# Restart the service manually
sudo systemctl restart myserver-online.service
# If you make changes to the service file - reload
sudo systemctl daemon-reload