Now that you have created your Redhat cluster, how do you properly monitor services that may or may not be running on a node? By using the cluster-snmp package.
For Redhat/Centos, on each of your nodes install the cluster-snmp agent.
[root@server1 snmp]# yum search cluster-snmp =============================================== N/S Matched: cluster-snmp ================================================ cluster-snmp.x86_64 : Red Hat Enterprise Linux Cluster Suite - SNMP agent |
[root@server1 snmp]# yum install cluster-snmp Loaded plugins: fastestmirror, security Loading mirror speeds from cached hostfile * base: centos.mirror.freedomvoice.com * extras: centos.mirror.ndchost.com * updates: mirror.raystedman.net Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package cluster-snmp.x86_64 0:0.16.2-20.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ========================================================================================================================== Package Arch Version Repository Size ========================================================================================================================== Installing: cluster-snmp x86_64 0.16.2-20.el6 base 124 k Transaction Summary ========================================================================================================================== Install 1 Package(s) Total download size: 124 k Installed size: 367 k Is this ok [y/N]: y Downloading Packages: cluster-snmp-0.16.2-20.el6.x86_64.rpm | 124 kB 00:00 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : cluster-snmp-0.16.2-20.el6.x86_64 1/1 Verifying : cluster-snmp-0.16.2-20.el6.x86_64 1/1 Installed: cluster-snmp.x86_64 0:0.16.2-20.el6 Complete! |
Add the following to the top of your snmpd.conf file. Update the path to just /usr/lib if not using x86_64.
dlmod RedHatCluster /usr/lib64/cluster-snmp/libClusterMonitorSnmp.so |
And in the views.
view systemview included REDHAT-CLUSTER-MIB:RedHatCluster |
Now restart your snmp daemon.
[root@server1 snmp]# service snmpd restart Stopping snmpd: [ OK ] Starting snmpd: [ OK ] |
Walk your snmp tree and see all the wonderful MIBs that are now exposed.
[root@server1 snmp]# snmpwalk -v 2c -c public server1 .1.3.6.1.4.1.2312 SNMPv2-SMI::enterprises.2312.8.1.1.0 = INTEGER: 2 SNMPv2-SMI::enterprises.2312.8.2.1.0 = STRING: "mysql-cluster" SNMPv2-SMI::enterprises.2312.8.2.2.0 = INTEGER: 1 SNMPv2-SMI::enterprises.2312.8.2.3.0 = STRING: "All services and nodes functional" SNMPv2-SMI::enterprises.2312.8.2.4.0 = INTEGER: 1 SNMPv2-SMI::enterprises.2312.8.2.5.0 = INTEGER: 2 SNMPv2-SMI::enterprises.2312.8.2.6.0 = INTEGER: 1 SNMPv2-SMI::enterprises.2312.8.2.7.0 = INTEGER: 2 SNMPv2-SMI::enterprises.2312.8.2.8.0 = STRING: "server1, server2" SNMPv2-SMI::enterprises.2312.8.2.9.0 = INTEGER: 2 SNMPv2-SMI::enterprises.2312.8.2.10.0 = STRING: "server1, server2" SNMPv2-SMI::enterprises.2312.8.2.11.0 = INTEGER: 0 SNMPv2-SMI::enterprises.2312.8.2.12.0 = "" SNMPv2-SMI::enterprises.2312.8.2.13.0 = INTEGER: 1 SNMPv2-SMI::enterprises.2312.8.2.14.0 = STRING: "mysql" SNMPv2-SMI::enterprises.2312.8.2.15.0 = INTEGER: 1 SNMPv2-SMI::enterprises.2312.8.2.16.0 = STRING: "mysql" SNMPv2-SMI::enterprises.2312.8.2.17.0 = INTEGER: 0 SNMPv2-SMI::enterprises.2312.8.2.18.0 = "" SNMPv2-SMI::enterprises.2312.8.2.19.0 = INTEGER: 0 SNMPv2-SMI::enterprises.2312.8.2.20.0 = "" SNMPv2-SMI::enterprises.2312.8.2.21.0 = INTEGER: 16 SNMPv2-SMI::enterprises.2312.8.3.1.1.1.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.49 = STRING: "server1" SNMPv2-SMI::enterprises.2312.8.3.1.1.1.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.50 = STRING: "server2" SNMPv2-SMI::enterprises.2312.8.3.1.1.2.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.49 = INTEGER: 0 SNMPv2-SMI::enterprises.2312.8.3.1.1.2.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.50 = INTEGER: 0 SNMPv2-SMI::enterprises.2312.8.3.1.1.3.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.49 = STRING: "Participating in cluster" SNMPv2-SMI::enterprises.2312.8.3.1.1.3.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.50 = STRING: "Participating in cluster" SNMPv2-SMI::enterprises.2312.8.3.1.1.4.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.49 = INTEGER: 1 SNMPv2-SMI::enterprises.2312.8.3.1.1.4.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.50 = INTEGER: 0 SNMPv2-SMI::enterprises.2312.8.3.1.1.5.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.49 = STRING: "mysql" SNMPv2-SMI::enterprises.2312.8.3.1.1.5.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.50 = "" SNMPv2-SMI::enterprises.2312.8.3.1.1.6.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.49 = INTEGER: 1 SNMPv2-SMI::enterprises.2312.8.3.1.1.6.15.98.117.114.98.45.109.121.115.113.108.45.112.48.48.50 = INTEGER: 2 SNMPv2-SMI::enterprises.2312.8.3.2.1.1.5.109.121.115.113.108 = STRING: "mysql" SNMPv2-SMI::enterprises.2312.8.3.2.1.2.5.109.121.115.113.108 = INTEGER: 0 SNMPv2-SMI::enterprises.2312.8.3.2.1.3.5.109.121.115.113.108 = STRING: "running" SNMPv2-SMI::enterprises.2312.8.3.2.1.4.5.109.121.115.113.108 = STRING: "automatic" |
SNMPv2-SMI::enterprises.2312.8.3.2.1.5.5.109.121.115.113.108 = STRING: “server1”