How do you reset a pacemaker cluster?
The proper way to do it is:
- disable your master/promotable resource, eg.: pcs resource disable pgsql-ha.
- shutdown the cluster, eg.: pcs cluster stop –all.
- reboot all your nodes.
- start Pacemaker, eg.: pcs cluster start –all.
- start the master/promotable resource, eg.: pcs resource enable pgsql-ha.
How do you put a pacemaker in maintenance mode?
1 – Run the pcs property set maintenance-mode=true command to place the cluster into maintenance mode. 2 – Next run the pcs property command to verity that it displays maintenance-mode: true which means the cluster is in maintenance mode.
What is the difference between standby and maintenance mode in Pacemaker cluster?
So for example, to compare two things which might appear similar: the main difference immediately visible between putting all nodes in standby mode, and putting the cluster in maintenance mode, is that for the former case, it will stop all services, since there’s no online node any more, while for the later, services …
What is no quorum policy?
1 Option no-quorum-policy. This global option defines what to do when the cluster does not have quorum (no majority of nodes is part of the partition). Allowed values are: ignore. The quorum state does not influence the cluster behavior at all, resource management is continued.
How do I restart computer resources?
Service Management Quick Start pcs resource enable resource_name to enable a disabled service. pcs resource restart resource_name to restart a running resource. pcs resource move resource_name to move a running resource to a new node.
How do you stop Corosync?
Stopping corosync service will first stop the pacemaker one….Cluster Stack Control using systemctl command:
| SLES HA Cluster Operation | systemd Commands |
|---|---|
| Stopping the cluster stack on one node | systemctl stop corosync |
| Restarting the cluster stack on one node | systemctl restart corosync |
How do I keep my cluster in maintenance mode?
In the left navigation bar, select Cluster Configuration. In the CRM Configuration group, select the maintenance-mode attribute from the empty drop-down box and click the plus icon to add it. To set maintenance-mode=true , activate the check box next to maintenance-mode and confirm your changes.
Which command puts the cluster into maintenance mode?
Procedure
- Put the cluster manager into maintenance mode on all hosts by issuing the following command: DB2DIR /bin/db2cluster -cm -enter -maintenance -all.
- Put the cluster file system service on the hosts into maintenance mode by issuing the following command: DB2DIR /bin/db2cluster -cfs -enter -maintenance -all.
What is cluster option?
Cluster options, as you might expect, control how the cluster behaves when confronted with certain situations. They are grouped into sets within the crm_config section, and, in advanced configurations, there may be more than one set.
What is the impact of Stonith enabled cluster setting?
The use of stonith-enabled=false is completely inappropriate for a production cluster. It tells the cluster to simply pretend that failed nodes are safely powered off. Some vendors will refuse to support clusters that have STONITH disabled.
What is Pacemaker Corosync?
Pacemaker is an open source cluster resource manager (CRM), a system that coordinates resources and services that are managed and made highly available by a cluster. In essence, Corosync enables servers to communicate as a cluster, while Pacemaker provides the ability to control how the cluster behaves.
How do I stop Suse cluster?
Procedure 17.1: Manually Rebooting a Cluster Node Report Documentation Bug #
- On the node you want to reboot or shut down, log in as root or equivalent.
- Put the node into standby mode: root # crm -w node standby.
- Check the cluster status with: root # crm status.
- Stop the cluster services on that node:
- Reboot the node.