Access Cluster Services

Once your cluster is successfully provisioned, a systemctl service called [e-mail] is created on each node. Administer your Coherence cluster on Oracle Cloud Infrastructure by using the systemctl commands on the [e-mail].

Note:

To change cluster configuration properties such as, the log level, you must modify the default-cluster.env file located in the /opt/usr/local/etc/ directory. For the changes to take effect, ensure that you restart the cluster instance after modifying the default-cluster.env file.

Using the SSH utility, log into your cluster instance as the opc user and issue the following commands to administer your cluster services:

Command	Description
sudo systemctl status [e-mail]	Returns the status of the cluster instance
sudo journalctl -u [e-mail]	View logs from your cluster instance To follow the logs, add the -f option to this command.
sudo systemctl stop [e-mail]	Stops the cluster instance
sudo systemctl start [e-mail]	Starts the cluster instance
sudo systemctl disable [e-mail]	Disables the Coherence cluster instance
sudo systemctl enable [e-mail]	Enables the Coherence cluster instance

Add a New Cluster Instance on a Node

You can add one or more cluster instances on each node. To add a new Coherence cluster instance on a node:

1. Using SSH, log in to your node as the opc user. Then, switch to the oracle user by running the sudo su - oracle command.
2. Open the /opt/usr/local/etc/ directory of your current node.
3. Save a copy of the default-cluster.env file with a new name, new-cluster.env.
4. Edit the new new-cluster.env file and change the value of the CLUSTER_NAME parameter to new-cluster.
5. Change any other parameter as required.
6. Exit sudo su - oracle and switch back to the opc user.
7. Create the cluster instance by running the sudo systemctl enable [e-mail] command.
8. Start the new cluster instance by running the sudo systemctl start [e-mail] command.