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2.10. Installing Storage Nodes Before Installing the Server
It is possible to create multiple storage nodes before installing a server, and then install the server with those pre-installed nodes. This is also useful if the storage database will be on a separate, dedicated machine.
Warning
This is an advanced configuration. If the storage node or nodes within the cluster are not properly configured, then the cluster may not properly function.
Warning
Deploying a node lists that node's host in the cluster configuration and any allowed host can gain access to the data in the storage cluster.
Restrict access to the
rhq-storage-auth.conf file so that the allowed hosts list cannot be altered to allow an attacker to gain access to the cluster and the stored data.
Important
Every storage node must use the same client (CQL) and gossip ports.
Additionally, the hostname and IP address of every storage node system must be fully resolvable in DNS or must be configured on each system's
hosts file.
- Determine the node and cluster configuration information to use.
- Identify the hostname or IP address of each system which will host a node.
- Define the two ports which the cluster uses for communication (9142 and 7100 by default).
- Before installing any storage node, edit the storage properties file with all of the node and cluster information.
vim serverRoot/jon-server-3.2.0.GA/bin/rhq-storage.properties
[root@server ~]# vim serverRoot/jon-server-3.2.0.GA/bin/rhq-storage.propertiesCopy to Clipboard Copied! Toggle word wrap Toggle overflow For example, this configures three nodes, set in therhq.storage.seedsparameter.rhq.storage.cql-port=9142 rhq.storage.gossip-port=7100 rhq.storage.seeds=192.68.0.0, 192.68.0.1, 192.68.0.2 start=false
rhq.storage.cql-port=9142 rhq.storage.gossip-port=7100 rhq.storage.seeds=192.68.0.0, 192.68.0.1, 192.68.0.2 start=falseCopy to Clipboard Copied! Toggle word wrap Toggle overflow - Install the storage node on each system, with its companion agent. This requires the IP address of the JBoss ON server, even though the server is not yet installed.Do not start the storage node or the agent at this point. Do not use the --start option with the installation script.
serverRoot/jon-server-3.2.0.GA/bin/rhqctl install --storage --agent-preference="rhq.agent.server.bind-address=192.68.0.2"
[root@server ~]# serverRoot/jon-server-3.2.0.GA/bin/rhqctl install --storage --agent-preference="rhq.agent.server.bind-address=192.68.0.2"Copy to Clipboard Copied! Toggle word wrap Toggle overflow - For each storage node, edit its local
rhq-storage-auth.conffile. This lists the hostnames or IP addresses for all of the storage nodes in the cluster, one per line.vim serverRoot/jon-server-3.2.0.GA/rhq-storage/conf/rhq-storage-auth.conf
[root@server ~]# vim serverRoot/jon-server-3.2.0.GA/rhq-storage/conf/rhq-storage-auth.conf 192.68.0.0 192.68.0.1 192.68.0.2Copy to Clipboard Copied! Toggle word wrap Toggle overflow After the server is configured, the local agent will update therhq-storage-auth.conffile with node hostnames or IP addresses as nodes are deployed and removed from the cluster. - Start each node.
serverRoot/jon-server-3.2.0.GA/bin/rhqctl.sh start --storage
[root@server ~]# serverRoot/jon-server-3.2.0.GA/bin/rhqctl.sh start --storageCopy to Clipboard Copied! Toggle word wrap Toggle overflow - Before installing the server, edit the
rhq-server.propertiesfile to include the connection information for the storage nodes.Add each storage node in a comma-separated listed to therhq.storage.nodesparameter. Then, add the client and gossip port values.vim serverRoot/jon-server-3.2.0.GA/bin/rhq-server.properties
[root@server ~]# vim serverRoot/jon-server-3.2.0.GA/bin/rhq-server.properties rhq.storage.nodes=192.68.0.0,192.68.0.1,192.68.0.2 rhq.storage.cql-port=9142 rhq.storage.gossip-port=7100Copy to Clipboard Copied! Toggle word wrap Toggle overflow - Install the server and an agent. Specifying the
--serverand--agentoptions only installs those two components; the storage database is excluded.serverRoot/jon-server-3.2.0.GA/bin/rhqctl.sh install --server --agent --start
[root@server ~]# serverRoot/jon-server-3.2.0.GA/bin/rhqctl.sh install --server --agent --startCopy to Clipboard Copied! Toggle word wrap Toggle overflow If you are upgrading an existing JBoss ON agent, then run the upgrade script with the--use-remote-storage-noteoption, to load the storage database information from the properties file rather than installing a storage node.serverRoot/jon-server-3.2.0.GA/bin/rhqctl.sh upgrade --use-remote-storage-node=true
[root@server]# serverRoot/jon-server-3.2.0.GA/bin/rhqctl.sh upgrade --use-remote-storage-node=trueCopy to Clipboard Copied! Toggle word wrap Toggle overflow
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