Set up a heartbeat cluster

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This article describes an example installation of a heartbeat cluster on SUSE Linux.

Contents

Architecture

sense name IP virtual/physical
first cluster node heartbeat-1 192.168.0.21 virtual
second cluster node heartbeat-2 192.168.0.22 virtual
iscsi storage tweedleburg 192.168.0.5 physical
virtual IP address gothere 192.168.0.20 virtual

Process

  • On heartbeat-*, install SLES 10 as per default, but I disable ZMD and the firewall.
  • establish passwordless login between heartbeat-1 and -2.
  • adapt /etc/hosts on both nodes so that it contains
192.168.0.21    heartbeat-1.site heartbeat-1
192.168.0.22    heartbeat-2.site heartbeat-2
  • configure the cluster on node 1
heartbeat-1:~ # yast2 heartbeat

Choose MD5 as auth method and myauth as password.

  • install heartbeat on node 2
heartbeat-2:~ # yast -i heartbeat
  • propagate the heartbeat configuration
heartbeat-1:~ # scp /etc/ha.d/ha.cf root@heartbeat-2:/etc/ha.d
heartbeat-1:~ # scp /etc/ha.d/authkeys root@heartbeat-2:/etc/ha.d
  • start the cluster
heartbeat-1:~ # /etc/init.d/heartbeat start
heartbeat-2:~ # /etc/init.d/heartbeat start
  • set a password for the hacluster admin
heartbeat-1:~ # passwd hacluster
  • configure the cluster
heartbeat-1:~ # hb_gui

Log in as hacluster user to heartbeat-1

Configure cluster resources

In the hb_gui program, you add a new resource group named resource_group. You add the first resource, a virtual IP. You add the start, stop and monitor operations to this. Then you start it. You will be able to ping it.

Shared storage

heartbeat-1:~ # /usr/lib64/heartbeat/sfex_init /dev/sdb
heartbeat-1:~ # /usr/lib64/heartbeat/sfex_lock /dev/sdb
acquired lock successfully.
heartbeat-1:~ # /usr/lib64/heartbeat/sfex_stat /dev/sdb
control data:
  magic: 0x01, 0x1f, 0x71, 0x7f
  version: 1
  revision: 3
  blocksize: 512
  numlocks: 1
lock data #1:
  status: lock
  count: 2
  nodename: heartbeat-1
status is LOCKED.
  • test the other cluster node realizes the lock:
heartbeat-2:~/sfex-1.3 # /usr/lib64/heartbeat/sfex_stat /dev/sdb
control data:
  magic: 0x01, 0x1f, 0x71, 0x7f
  version: 1
  revision: 3
  blocksize: 512
  numlocks: 1
lock data #1:
  status: lock
  count: 2
  nodename: heartbeat-1
status is UNLOCKED.