Hello Michael,
can you do the following command on both and paste the result:
cat /proc/drbd
If it's "secondary/secondary" then do drbdadmin primary mysql on one of
them.
Regards
Fabrice
Le 2017-01-25 à 14:05, Campanaro, Michael a écrit :
I've been trying to cluster together two Packetfence 6.4 servers
together and have been getting nothing but trouble in my attempts. I'm
following the Clustering guide word for word but can't seem to get it
to work. Everything goes fine up until the point of finalizing the
DRBD portion. When I create the ext4 filesystem for /dev/drbd0 and
then try to mount it at /var/lib/mysql as per the guide, it mounts in
read only mode. I cannot move my SQL files back into the folder nor
can I write anything to it. I've tried remounting the drive as
read-write but I get an error saying the drive is write protected.
I've found that a way around this problem is to instead make the
/dev/drbd0 device as an ext3 filesystem. I can then move my SQL backup
files back into the mysql folder and restart the mariadb process.
However, at this point everything breaks on me. I can no longer access
the admin gui for packetfence and I get fatal errors in the logs
saying "ERROR: Could not write namespace resource ::switches_list to
L2 cache!" and "ERROR: Couldn't connect to MySQL database to access
L2. This is a major problem!"
When this first happened I figured it would all be fixed once I finish
all the steps in the cluster guide. But I've now done everything I'm
supposed to in the guide and it's still not working properly. The PCS
cluster is set up, I can see my master and slave server in the cluster
and there are no errors when I run "pcs status."
However I'm still not able to log into the admin gui anymore, it tells
me I'm using the wrong user name and password. I tried restarting the
packetfence service and now it won't start at all anymore. I've been
working at this for the past few days and have had no progress. Both
servers are virtual machines so I can revert to older snapshots and
try everything in the guide multiple times but each time I attempt to
set up clustering everything goes wrong.
I'm convinced it has something to do with DRBD and mounting in the
/var/lib/mysql folder because that's the point where the errors start
flowing in. Any help would be appreciated.
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