fmDNS incorrectly writes files in RHEL/Centos 7 chroot setup #346
When fmDNS generates a config it incorrectly writes files to /var/named/chroot/[etc|var]
Under RHEL/Centos 7 named-chroot now creates a lot of bind mounted files.
The issue cropped up when I was dealing with rndc.key, I already had /etc/rndc.key file but when fmDNS generated the config it complained about a existing file and filed to build the config.
So I duplicated the key inside of fmDNS and move /etc/rndc.key out of the way, this time the build completed and the file was written but it was written effectively twice also it wrote in /var/named/chroot/etc named.conf.keys. rndc.key was written once in /etc and second in /var/named/chroot/etc. This caused the service to not start correctly since the include in named.conf to include named.conf.keys could not be found in /etc only in /var/named/chroot/etc.
The output of systemctl
To fix this I had to figure out how named-chroot put together it's list files to bind mount and found this in /usr/libexec
I edited the top of the file and added named.conf.keys, then touched /etc/named.conf.keys to create a empty file. I started the service and it was happy, next ran a build from fmDNS and it was happy, generated the files all correctly.
Then I tested by stopping service and checked /etc/named.conf.keys and sure enough it was populated now. started service and all works.
This leads to question what other files need to be added to that bind list.
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