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Instructions for PCS - Pacemaker/Corosync configuration system on Debian
========================================================================
1. Adding PCS to an existing cluster
------------------------------------
These instructions assume you wish to install PCS on a running
Pacemaker/Corosync cluster already configured using crmsh.
First of all, install pcs package on all cluster nodes and
check that pcsd service is running on each of the nodes:
# service pcsd status
● pcsd.service - PCS GUI and remote configuration interface
Loaded: loaded (/lib/systemd/system/pcsd.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2019-01-11 13:22:19 UTC; 22h ago
Docs: man:pcsd(8)
man:pcs(8)
Main PID: 26533 (pcsd)
Tasks: 1 (limit: 1149)
Memory: 25.5M
CGroup: /system.slice/pcsd.service
└─26533 /usr/bin/python3 -Es /usr/sbin/pcsd
Service pcsd uses TCP port 2224 so make sure this port is open
for access by all cluster nodes.
Next, set a password for hacluster user on all cluster nodes:
# passwd hacluster
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Finally, authenticate the cluster nodes by running only on one of them:
# pcs cluster auth
Username: hacluster
Password:
node1: Authorized
node2: Authorized
Cluster is now fully operational and both crm and pcs commands can
be used to manage cluster resources:
# pcs cluster status
Cluster Status:
Stack: corosync
Current DC: node2 (version 2.0.1-15814c6c0d) - partition with quorum
Last updated: Sat Jan 12 11:43:01 2019
Last change: Sat Jan 12 11:36:04 2019 by hacluster via crmd on node2
2 nodes configured
1 resource configured
PCSD Status:
node1: Online
node2: Online
2. Initializing a new cluster using PCS
---------------------------------------
These instructions assume you wish to create a new Pacemaker/Corosync
cluster using PCS.
WARNING: Do not run the commands from this section on a working
cluster as they will delete the existing cluster configuration
and therefore influence running cluster resources.
First of all, install pcs package on all cluster nodes. After
package installation cluster services (corosync, pacemaker and pcsd)
should be running on all nodes with default configuration.
Next, set a password for hacluster user on all cluster nodes:
# passwd hacluster
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Then authenticate the cluster nodes by running:
# pcs host auth node1 addr=10.0.0.1 node2 addr=10.0.0.2
Username: hacluster
Password:
node1: Authorized
node2: Authorized
Finally, the cluster is configured and started by running on one
of the nodes:
# pcs cluster setup debian node1 addr=10.0.0.1 node2 addr=10.0.0.2 --force --enable --start --wait
Warning: node1: Running cluster services: 'corosync', 'pacemaker', the host seems to be in a cluster already
Warning: node1: Cluster configuration files found, the host seems to be in a cluster already
Warning: node2: Running cluster services: 'corosync', 'pacemaker', the host seems to be in a cluster already
Warning: node2: Cluster configuration files found, the host seems to be in a cluster already
Destroying cluster on hosts: 'node1', 'node2'...
node2: Successfully destroyed cluster
node1: Successfully destroyed cluster
Requesting remove 'pcsd settings' from 'node1', 'node2'
node1: successful removal of the file 'pcsd settings'
node2: successful removal of the file 'pcsd settings'
Sending 'corosync authkey', 'pacemaker authkey' to 'node1', 'node2'
node1: successful distribution of the file 'corosync authkey'
node1: successful distribution of the file 'pacemaker authkey'
node2: successful distribution of the file 'corosync authkey'
node2: successful distribution of the file 'pacemaker authkey'
Synchronizing pcsd SSL certificates on nodes 'node1', 'node2'...
node1: Success
node2: Success
Sending 'corosync.conf' to 'node1', 'node2'
node1: successful distribution of the file 'corosync.conf'
node2: successful distribution of the file 'corosync.conf'
Cluster has been successfully set up.
Enabling cluster on hosts: 'node1', 'node2'...
node2: Cluster enabled
node1: Cluster enabled
Starting cluster on hosts: 'node1', 'node2'...
Waiting for nodes to start: 'node1', 'node2'...
node2: Cluster started
node1: Cluster started
-- Valentin Vidic <vvidic@debian.org> Sat, 12 Jan 2019 12:42:29 +0100
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