These actions are unsupported since the changes are to the OS, not the Checkmk software. This behavior was observed only on SUSE Linux Enterprise Server 15 (SLES15) with Service Pack 4.
Problem
You may encounter an issue where the characters in your Checkmk service graphs appear incorrect. This is caused by the default font pack that SLES15 SP4 uses.
Solution
To resolve this, you can execute the following commands either as a normal Linux user or as root:
Stop the site
root@linux# omd stop <mysite>
.
Change directory to /usr/share/
root@linux# cd /usr/share/
.
Create a backup of the original fonts file
root@linux:/usr/share# mv fonts fonts.bak
.
Install zypper
root@linux:/usr/share# zypper install -f google-opensans-fonts
.
Start the site
root@linux:/usr/share# omd start <mysite>
After the Checkmk site has been restarted, the service graphs should display as expected.
