| Section | |||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
...
High availability is a function that syncronizes two SONARPLEX devices by copying the configuration, all RRD graphs and all log files from a master to a slave SONARPLEX device. In case of a failure (e.g. hardware malfunction, power outage etc.) of the master, the slave will load the synchronized data and takes over the role of the former master.
| Infowarning |
|---|
This does does not include include an automatic IP-address failover! All IPs remain unchanged, so make sure the slave has access to all of the configured hosts that are being monitored! |
If the real master is back online, the slave will recognize it and falls back to the slave state automatically. In this moment, all RRD graphs and log files that were collected in the meantime will be re-synced with the real master again.
| Infowarning |
|---|
Only RRD graphs and logs are getting re-synced back. Configuration changes are not synced back! Any config changes done while the slave acted as master will be lost. Better consider creating a backup of the configuration to restore it on the real master after switching back. |
Example Setup
The instructions are based on the example setup as described below.
...
> Status > MonitorInsert excerpt _OpenAdminWeb _OpenAdminWeb nopanel true - Click on "Stop the monitor process"
- Wait for the HA slave SONARPLEX to take over
Disconnect from the network (not recommended)
The last way is to just disconnect the HA master SONARPLEX from the network so the HA slave SONARPLEX won't recognize it anymore. This is not recommended as the monitoring procss on the former HA master SONARPLEX is still running and you can end up with inconsistent graphs and logs, once the connection has been re-established.
...
If a failover has taken place and all problems have been solved, many wish to switch back to the original state of the setup (former slave being slave and former master being master again). This can be done simply by starting both SONARPLEX appliances and having them connected to your network in a way that they can communicate with each other. The former HA slave SONARPLEX will notice the HA master SONARPLEX to be back online and automatically synchronizes the collected graphs and log files. After completion, it will recover its former configuration with the only check being the HA master check.
| Infowarning |
|---|
Only log files and graphs are synchronized back to the HA master SONARPLEX! Changes in configuration done on the HA slave SONARPLEX while running as HA master are not getting transferred back and and will be be lost! If you made changes to the config, create a backup and save it prior to the switchback. |
...
How to proceed in case of hardware failures/RMA
...