Heartbeat 2 cheatsheet



List cluster resources. crm_resource -L
Dump cluster configuration as xml to stdout. cibadmin -Q
Place node in standby (maintenance mode). Technically this is adding the standby property. crm_standby -U -v true
Place local node in standby. crm_standby -v true
Place node online or remove the standby property. crm_standby -D -U
Place local node online or remove standby property. crm_standby -D
View cluster status. One time to stdout. crm_mon -1
View cluster status. Refresh every 3s. crm_mon -i3
One line simple output. crm_mon -s
Show inactive resources. crm_mon -r
Stop resource. crm_resource -r -p target_role -v stopped
Start resource. crm_resource -r -p target_role -v started
Clear failed resource. crm_resource -C -H -r
Query running cluster for current state (STDOUT). cibadmin -Q --obj_type resources

Choosing a host naming convention


Hello, my name is Dns

Whether realizing it or not every organization goes through the process of selecting a naming convention. Often this is done without much forward planing resulting in unwieldy host and service names. In the worst cases host names are dropped completely and either by habit or lack of a proper DNS service only ip addresses are used.

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