Hi, we recently made a cluster out of a standalone graylog server. We had one machine where all services were running, now we have two and in both ES, MongoDB, Graylog and the web interface set up. We did this to improve the performance and availability of our graylog.
We are unsure about how to set up the is_master setting. From the documentation: Set only one graylog-server node as the master. This node will perform > periodical and maintenance actions that slave nodes won’t. Every slave node > will accept messages just as the master nodes. Nodes will fall back to > slave mode if there already is a master in the cluster. It says to set only one node as the master, but setting more than one seems to be safe, as they will fall back to slave mode. Does that also mean that the slave will become a master if the original master becomes unresponsive? If not, does that mean that if the master is not available anymore, that our graylog cluster won't be working properly? Also, we had a similar problem with the web interface. In the beginning we set in the configuration the URIs for both graylog nodes. It worked but from time to time it gave errors, this exception in the log: play.api.Application$$anon$1: Execution > exception[[Graylog2MasterUnavailableException: null]] We removed the slave from the web interface configuration and now this error does not happen anymore. In the nodes page of the web interface we can see both nodes. Does this mean that only the master can be queried by the web interface? We succeeded improving our graylog's performance, but we still have a single point of failure. Any help would be appreciated. Thank you, Joan Ardiaca -- You received this message because you are subscribed to the Google Groups "Graylog Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/graylog2/12460af0-94f4-458b-adb5-b3c68d8b8691%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
