Details
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Type:
Bug
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Status: Closed
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Priority:
Minor
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Resolution: Fixed
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Affects Version/s: 10.0.12-galera
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Fix Version/s: 5.5.42-galera, 10.0.17-galera
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Component/s: Galera Arbitrator garbd
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Environment:64-bit CentOS 6.5
galera-25.3.5-1.rhel6.x86_64 RPM
Description
I installed the galera 25.3.5 RPM from the http://yum.mariadb.org/10.0/centos6-amd64 repo and after configuring /etc/default/garb, I then ran "/etc/init.d/garb start" without any of the configured cluster nodes being up.
First issue is that line 122 reads:
nc -z $HOST $PORT >/dev/null && break
and yet a standard CentOS 6.5 server install doesn't include the "nc" command. I had to "yum install nc" to fix this, but the RPM should obviously have nc as a dependency.
Second problem is that the code in that loop (lines 118-123) will test each node and then set $ADDRESS = 0 (and hence $HOST =0 and $PORT = 0) if none of the $
{GALERA_NODES} nodes are running. Unfortunately, this produces a port error message from CentOS 6.5's nc command because "nc -z 0 0" is, of course, not correct.The fix for this is probably to only run the code if $ADDRESS != 0 e.g.:
for ADDRESS in ${GALERA_NODES}
0; do
if [ "$ADDRESS" != "0"]
then
HOST=$(echo $ADDRESS | cut -d \: -f 1 )
PORT=$(echo $ADDRESS | cut -d \: -f 2 )
PORT=$
nc -z $HOST $PORT >/dev/null && break
fi
done
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Thank you for reporting the bug and suggestions.
I have opened a bug with galera : https://bugs.launchpad.net/galera/+bug/1341028
Fixed in galera-25.3.9.
I knew I'd miss some info and get something wrong too...
It is, of course, /etc/sysconfig/garb that I edited on CentOS 6.5, not /etc/default/garb. My setup involved a 2-node cluster with a third node just running garbd, so an example line in the garb conf (IPs changed to protect the innocent
) would be:
GALERA_NODES="192.168.0.1:4567 192.168.0.2:4567"
with, say, the third node being 192.168.0.3. Also note that when the cluster is up and running, "/etc/init.d/garb start" runs successfully with no errors.