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章 7. Managing Red Hat High Availability Add-On With ccs

This chapter describes various administrative tasks for managing the Red Hat High Availability Add-On by means of the ccs command, which is supported as of the Red Hat Enterprise Linux 6.1 release and later. This chapter consists of the following sections:

7.1. Managing Cluster Nodes

This section documents how to perform the following node-management functions with the ccs command:

7.1.1. Causing a Node to Leave or Join a Cluster

You can use the ccs command to cause a node to leave a cluster by stopping cluster services on that node. Causing a node to leave a cluster does not remove the cluster configuration information from that node. Making a node leave a cluster prevents the node from automatically joining the cluster when it is rebooted.
To cause a node to leave a cluster, execute the following command, which stops cluster services on the node specified with the -h option:
ccs -h host --stop
When you stop cluster services on a node, any service that is running on that node will fail over.
To delete a node entirely from the cluster configuration, use the --rmnode option of the ccs command, as described in 節 6.4, “Creating and Modifying a Cluster”.
To cause a node to rejoin a cluster execute the following command, which starts cluster services on the node specified with the -h option:
ccs -h host --start

7.1.2. Adding a Member to a Running Cluster

To add a member to a running cluster, add a node to the cluster as described in 節 6.4, “Creating and Modifying a Cluster”. After updating the configuration file, propagate the file to all nodes in the cluster and be sure to activate the new cluster configuration file, as described in 節 6.15, “Propagating the Configuration File to the Cluster Nodes”.