Comments for MMM Community Blog

Comment on Verify master-master[||-slave] data consistency without locking or downtime by jack

jack — Fri, 11 May 2012 06:57:08 +0000

thanks

i’m sure that two masters and a slave ,they have the same mmm_common.conf and Like this:

cluster_interface eth1

pid_path /var/run/mmm_agentd.pid
bin_path /usr/lib/mysql-mmm/

replication_user slave
replication_password slave

agent_user mmm_agent
agent_password agent_password

ip 192.168.10.6
mode slave

ip 192.168.10.7
mode master
peer db3

ip 192.168.10.8
mode master
peer db2

hosts db3, db2
ips 192.168.10.200
mode exclusive

hosts db1,db2, db3
ips 192.168.10.202, 192.168.10.203, 192.168.10.204
mode balanced

Comment on Verify master-master[||-slave] data consistency without locking or downtime by jack

jack — Thu, 10 May 2012 06:00:47 +0000

Can you send the answer to my email,sometime i can not visit foreign website.

thanks.

Comment on Verify master-master[||-slave] data consistency without locking or downtime by jack

jack — Thu, 10 May 2012 05:53:11 +0000

hello,when slave agent startup ,i use debug 1 ,then following this :

2012/05/10 13:33:55 DEBUG Executing /usr/lib/mysql-mmm//agent/set_active_master db3
Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/vendor_perl/5.8.8/MMM/Agent/Helpers/Actions.pm line 319.
2012/05/10 13:33:55 DEBUG Result: undef
2012/05/10 13:33:55 FATAL Failed to change master to ‘db3′: undef

and what’s wrong? master1+master2 VIP switch well.

Comment on MMM Nagios plugin by roni

roni — Mon, 05 Dec 2011 09:33:15 +0000

Hello
i have a question about check_mm. If i start that scrip on the mmm_control Server its ok but i start that script on my nagios server whith check_nrpe comes following message:CRITICAL: Cannot Find/Execute mmm_control

I hope you can me help

Comment on Centralized authentication with mysql by Matthew Montgomery

Matthew Montgomery — Mon, 11 Apr 2011 18:19:56 +0000

I have some great news. A year and half after this thread started, the first release with officially supported privilege tables stored in NDBCLUSTER engine is available!

Please check it out!
http://dev.mysql.com/doc/refman/5.1/en/mysql-cluster-privilege-distribution.html

Comment on Some use-cases for MMM for MySQL by Brian

Brian — Thu, 20 Jan 2011 18:35:16 +0000

Isn’t the management mode a single point of failure?

Comment on MMM Nagios plugin by Titanium Jewellery

Titanium Jewellery — Thu, 06 Jan 2011 03:45:14 +0000

I am really eager to get nagios monitoring my mmm deployment, but am running into a few snags. I have nrpe working properly and I can call check_mmm, but it always returns status ok no matter what. Any ideas?

Comment on Centralized authentication with mysql by Deb

Deb — Tue, 04 Jan 2011 20:44:01 +0000

@istvan good point but it is possible. Read again to see what I mean.

Comment on MMM Nagios plugin by istvan_podor

istvan_podor — Fri, 13 Aug 2010 21:15:56 +0000

@Josh

Sorry for ignoring your comment so long. I have added the changes you made and committed the code.

Thanks a lot. If you have any other patches, let us know!

Istvan

Comment on MMM Nagios plugin by Josh

Josh — Thu, 07 Jan 2010 05:29:28 +0000

The issue for me was that the nrpe daemon, running as the nrpe user, did not have read access to the files in /etc/mysql-mmm/ . We chgrp’d them and now it works

When the nrpe daemon runs the command and it can’t access the files config files it returns an ‘OK’. Maybe the code needs to be altered to not show OK if it can’t read the files??

[root@mmmmonitordev01 ~]# cd /etc/mysql-mmm/
[root@mmmmonitordev01 mysql-mmm]# ls -la
total 36
drwxr-xr-x 2 root root 4096 Jan 4 15:38 .
drwxr-xr-x 84 root root 12288 Jan 7 14:37 ..
-rw-r—– 1 root nrpe 33 Dec 21 15:13 mmm_agent.conf
-rw-r—– 1 root nrpe 941 Jan 4 15:38 mmm_common.conf
-rw-r—– 1 root nrpe 325 Jan 4 15:14 mmm_mon.conf
-rw-r—– 1 root nrpe 1293 Dec 21 15:13 mmm_tools.conf

These are the modifications we made to check_mmm

#v1 ERROR Monitor message changed
if ($mmm_output =~ /DAEMON IS NOT RUNNING/) {
my $msg = “CRITICAL: MMM Daemon is not running”;
report_error($msg, $ERRORS{‘CRITICAL’});
}
#v2 ERROR Monitor message changed
if ($mmm_output =~ /ERROR: Can’t connect to monitor daemon/) {
my $msg = “CRITICAL: MMM Monitor Daemon is not running”;
report_error($msg, $ERRORS{‘CRITICAL’});
}

#mmm2 extend
if ($mmm_output =~ m/passive/i) {
my $msg = “CRITICAL: MMM Monitor Daemon is in passive mode”;
report_error($msg, $ERRORS{‘WARNING’});
}

if ($mmm_output =~ m/agent/i) {
my $msg = “CRITICAL: MMM Agent Daemon is NOT running on ALL DB’s in the cluster”;
report_error($msg, $ERRORS{‘CRITICAL’});
}