Restarting a cluster
Restart an entire cluster in OpsCenter monitoring. Each node in the cluster restarts in a sequential rolling fashion after a sleep time elapses. Adjust the default rolling restart configuration options if necessary.
Restart an entire cluster in OpsCenter monitoring. Each node in the cluster restarts in a sequential rolling fashion after a sleep time elapses. Optionally, drain each node before stopping and restarting each node in the cluster. Some operations such as enabling commit log backups prompt you to perform a rolling restart. There are rolling restart configuration options available for fine-tuning your environment.
cluster_name.conf
The location of the cluster_name.conf file depends on the type of installation:- Package installations: /etc/opscenter/clusters/cluster_name.conf
- Tarball installations: install_location/conf/clusters/cluster_name.conf
Adjusting rolling restart configuration options
If your environment experiences restart node failures, adjustments might be necessary to the default rolling restart configuration values in cluster_name.conf:
- [cassandra] rolling_restart_error_threshold
- A rolling restart will be cancelled if the number of errors during the restart reaches this number. This helps prevent having too many nodes down in a cluster if something catastrophic happens during a rolling restart. Default: 1.
- [cassandra] rolling_restart_retry_attempts
- The maximum number of connection retry attempts after restarting a Cassandra node. Default: 25.
- [cassandra] rolling_restart_retry_delay
- The number of seconds to wait between retry attempts when connecting to Cassandra after restarting a node. Default: 5.
- [cassandra] restart_delay
- During a rolling restart, the time in seconds OpsCenter waits after sending the command to stop Cassandra before sending the command to start it again. The default is 30 seconds.
Procedure
-
Click Restart from the Cluster
Actions menu.
The Rolling Restart dialog appears.
- Set the amount of time to wait after restarting each node. The default is 60 seconds.
- Optional: Select whether to drain the nodes before stopping.
-
Click Restart Cluster.
A message at the top of the screen indicates the rolling restart is in progress.
-
To view the progress, click Show Details in the message,
or click Activities in the left navigation pane. The
Activities icon reflects the number of operations currently in progress. A
cluster successfully restarted message indicates when the restart cluster
operation has completed.