Difference between revisions of "Set up a heartbeat cluster"
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| − | + | This article describes an example installation of a heartbeat cluster on SUSE Linux. | |
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| − | + | = Architecture = | |
| + | {| class="wikitable sortable" border=1 | ||
| + | ! 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. | * establish [[passwordless login]] between heartbeat-1 and -2. | ||
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* adapt /etc/hosts on both nodes so that it contains | * adapt /etc/hosts on both nodes so that it contains | ||
192.168.0.21 heartbeat-1.site heartbeat-1 | 192.168.0.21 heartbeat-1.site heartbeat-1 | ||
192.168.0.22 heartbeat-2.site heartbeat-2 | 192.168.0.22 heartbeat-2.site heartbeat-2 | ||
| + | * configure the cluster on node 1 | ||
| + | heartbeat-1:~ # [[yast]]2 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 = | ||
| + | * on tweedleburg, [[install an iscsi storage]] | ||
| + | * [[build]] sfex from http://www.linux-ha.org/sfex on both nodes | ||
| + | * set up an iscsi initiator on both nodes, we assume it makes the device ''/dev/sdb''. | ||
| + | * test sfex by locking ''/dev/sdb'' | ||
| + | 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.''' | ||
Latest revision as of 14:23, 8 May 2009
This article describes an example installation of a heartbeat cluster on SUSE Linux.
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.
- on tweedleburg, install an iscsi storage
- build sfex from http://www.linux-ha.org/sfex on both nodes
- set up an iscsi initiator on both nodes, we assume it makes the device /dev/sdb.
- test sfex by locking /dev/sdb
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.
