Adding nodes to a cluster

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Clusters > Adding nodes to a cluster

Adding nodes to a cluster

Help | Content Gateway | Version 7.7.3

Content Gateway detects new Content Gateway nodes on your network and adds them to the cluster, propagating the latest configuration information to the newcomer. This provides a convenient way to bootstrap new machines.

To connect a node to a Content Gateway cluster, you need only install Content Gateway software on the new node, making sure during the process that the cluster name and port assignments are the same as those of the existing cluster. In this way, Content Gateway automatically recognizes the new node.


	Important The nodes in a cluster must be homogeneous; each node must be on the same hardware platform, each must be on the same operating system version, and Content Gateway must be installed in the same directory (/opt/WCG).

1.	Install the appropriate hardware and connect it to your network. (Consult your hardware documentation for hardware installation instructions.)

2.	Install the Content Gateway software using the appropriate procedure for installing a cluster node. See the Content Gateway Installation Guide. During the installation procedure, make sure that the following is true:

The cluster name that you assign to the new node is the same as the cluster name for the existing cluster.

The port assignments for the new node are the same as the port assignments used by the other nodes in the cluster.

You have added multicast addresses and multicast route settings.

3.	Restart Content Gateway. See Starting and stopping Content Gateway on the Command Line.

If you have an existing Content Gateway installation and you want to add that server to the cluster, you do not have to reinstall Content Gateway on the node. Instead, you can edit configuration variables on the existing Content Gateway node.

1.	On the node you want to add to the cluster, open the records.config file located in /opt/WCG/config.

2.	Edit the following variables:


Variable	Description
proxy.local.cluster.type	Specify the clustering mode: 2 = management mode 3 = no clustering
proxy.config.proxy_name	Specify the name of the Content Gateway cluster. All nodes in a cluster must use the same name.
proxy.config.cluster. mc_group_addr	Specify the multicast address for cluster communications. All nodes in a cluster must use the same multicast address.
proxy.config.cluster.rsport	Specify the reliable service port. The reliable service port is used to send data between the nodes in the cluster. All nodes in a cluster must use the same reliable service port. The default value is 8087.
proxy.config.cluster.mcport	Specify the multicast port. The multicast port is used for node identification. All nodes in a cluster must use the same multicast port. The default port number is 8088.
proxy.config.cluster. ethernet_interface	Specify the network interface for cluster traffic. All nodes in a cluster must use the same network interface.

3.	Save and close the file.

4.	Restart Content Gateway (/opt/WCG/WCGAdmin restart).

To change from Management mode to Single node or vice versa:

1.	Access Content Gateway Manager.

2.	Navigate to Configure > My Proxy > Basic > Clustering.

3.	In the Cluster Type area, select the appropriate type (Single or Management).

4.	Click Apply.

5.	Click Restart on Configure > My Proxy > Basic > General.

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Clusters > Adding nodes to a cluster