Configuring and starting clustering services
Having reviewed the key networking concepts that were outlined earlier, we are now ready to start describing the cluster services.
Starting and enabling clustering services
You will recall from the previous chapter that we installed the following clustering components:
- Pacemaker: This is the cluster resource manager
- Corosync: This is the messaging service
- PCS: This is the synchronization and configuration tool
As you can probably guess from the preceding list, these components should run as daemons, a special type of process that runs in the background without the need of direct intervention or control of an administrator. Although we installed the necessary packages in Chapter 1, Cluster Basics and Installation on CentOS 7, we did not start the cluster resource manager or the messaging services. So, we now need to start them manually for the first time and enable them to run automatically on startup during the next system boot.
We will start by configuring...
