rrdtool (via munin-node) graphs have no fonts..
This is not my actual graph as I already fixed the problem.. but this was my graph on the right.
apk add font-opensans
find . -name *.png | xargs rm
then waited for it to run again..
Possibly other fonts would also work..
apk list | grep font | grep installed
fontconfig-2.14.1-r0 x86_64 {fontconfig} (MIT) [installed]
mkfontscale-1.2.2-r1 x86_64 {mkfontscale} (MIT) [installed]
font-alias-1.0.4-r0 x86_64 {font-alias} (MIT) [installed]
font-opensans-0_git20210927-r1 x86_64 {font-opensans} (Apache-2.0) [installed]
libfontenc-1.1.6-r0 x86_64 {libfontenc} (MIT) [installed]
font-sony-misc-1.0.3-r3 x86_64 {font-sony-misc} (MIT) [installed]
minus opensans that is what was previously installed.
3.17.3 release
Thank you in advance.