Pacemaker : Install2024/07/23 |
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Install and Configure Linux High Availability System, Pacemaker. This example is based on the environment like follows.
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+----------------------+ | +----------------------+
| [ Cluster Node#1 ] |10.0.0.51 | 10.0.0.52| [ Cluster Node#2 ] |
| node01.srv.world +----------+----------+ node02.srv.world |
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+----------------------+ +----------------------+
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| [1] | On all Nodes, Install Pacemaker and configure some settings. |
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root@node01:~#
apt -y install pacemaker pcs
root@node01:~#
systemctl enable pcsd
# set cluster admin password root@node01:~# passwd hacluster Changing password for user hacluster. New password: Retype new password: passwd: all authentication tokens updated successfully. # initialize cluster root@node01:~# pcs cluster destroy |
| [2] | On a Node, Configure basic Cluster settings. |
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# authorize among nodes root@node01:~# pcs host auth node01.srv.world node02.srv.world Username: hacluster Password: node01.srv.world: Authorized node02.srv.world: Authorized # configure cluster root@node01:~# pcs cluster setup ha_cluster node01.srv.world node02.srv.world No addresses specified for host 'node01.srv.world', using 'node01.srv.world' No addresses specified for host 'node02.srv.world', using 'node02.srv.world' Destroying cluster on hosts: 'node01.srv.world', 'node02.srv.world'... node01.srv.world: Successfully destroyed cluster node02.srv.world: Successfully destroyed cluster Requesting remove 'pcsd settings' from 'node01.srv.world', 'node02.srv.world' node01.srv.world: successful removal of the file 'pcsd settings' node02.srv.world: successful removal of the file 'pcsd settings' Sending 'corosync authkey', 'pacemaker authkey' to 'node01.srv.world', 'node02.srv.world' node01.srv.world: successful distribution of the file 'corosync authkey' node01.srv.world: successful distribution of the file 'pacemaker authkey' node02.srv.world: successful distribution of the file 'corosync authkey' node02.srv.world: successful distribution of the file 'pacemaker authkey' Sending 'corosync.conf' to 'node01.srv.world', 'node02.srv.world' node01.srv.world: successful distribution of the file 'corosync.conf' node02.srv.world: successful distribution of the file 'corosync.conf' Cluster has been successfully set up. # start services for cluster root@node01:~# pcs cluster start --all node01.srv.world: Starting Cluster... node02.srv.world: Starting Cluster... # set auto-start root@node01:~# pcs cluster enable --all node01.srv.world: Cluster Enabled node02.srv.world: Cluster Enabled # show status root@node01:~# pcs cluster status Cluster Status: Cluster Summary: * Stack: corosync (Pacemaker is running) * Current DC: node01.srv.world (version 2.1.6-6fdc9deea29) - partition with quorum * Last updated: Mon Jul 22 23:59:21 2024 on node01.srv.world * Last change: Mon Jul 22 23:59:08 2024 by hacluster via crmd on node01.srv.world * 2 nodes configured * 0 resource instances configured Node List: * Online: [ node01.srv.world node02.srv.world ] PCSD Status: node02.srv.world: Online node01.srv.world: Onlineroot@node01:~# pcs status corosync
Membership information
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Nodeid Votes Name
1 1 node01.srv.world (local)
2 1 node02.srv.world
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| [3] | If you'd like to remove all cluster settings to initialize, run like follows. |
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root@node01:~# pcs cluster stop --all node01.srv.world: Stopping Cluster (pacemaker)... node02.srv.world: Stopping Cluster (pacemaker)... node01.srv.world: Stopping Cluster (corosync)... node02.srv.world: Stopping Cluster (corosync)...root@node01:~# pcs cluster destroy --all Warning: Unable to load CIB to get guest and remote nodes from it, those nodes will not be deconfigured. node02.srv.world: Stopping Cluster (pacemaker)... node01.srv.world: Stopping Cluster (pacemaker)... node02.srv.world: Successfully destroyed cluster node01.srv.world: Successfully destroyed cluster |
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