So for alert manager, the alerts will be sent to every member of an Alertmanager cluster before firing. Is it correct? But when the alerts are fired, it will only have 1 notification eg. in destination Email or Slack? On Thursday, June 10, 2021 at 2:09:59 PM UTC+8 Stuart Clark wrote:
> On 10/06/2021 06:36, nina guo wrote: > > Thank you Stuart. > > For my understanding, the concept of HA is there are 2 instances - > > master and slave. Master is running, and slave is standby. If master > > breakes down, slave will take over. > > But now for Prometheus, the 2 promethues instanaces are running at the > > same time with scraping the same metrics. > > I research the tool Promxy. It is mainly for aggregating the metrics. > > It will deduplicate and merge the metrics. > > I'm a little confuse about the HA on Promethues. It is a bit different > > with the normal concept. > > Yes. Prometheus does not run as a cluster or active/passive pair where > they communicate and transfer information between themselves. Instead > you run two totally separate Prometheus servers which maintain their own > (slightly different) view of the world and then query in a way that > prevents duplication. > > > > > Regarding alert manager, I noticed that it has native HA solution. So > > that is to say, deploying 2 alert managers is OK? If there is any > > alert, it will be sent 2 times with the 2 alert managers separately. > > I'm still not very clear about the concept of HA for alert manager. > > > For Alertmanager the different instances communicate with each other > forming a cluster. Information about alerts is shared with a full copy > of that data held by each instance. Any Prometheus servers attached must > inform every member of an Alertmanager cluster. When alerts fire > Alertmanager will ensure a single notification is sent and will continue > to work even if cluster instances stop operating. > > -- > Stuart Clark > > -- You received this message because you are subscribed to the Google Groups "Prometheus 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/prometheus-users/91f0fe1f-abec-48dd-ae3a-13ee18f59f03n%40googlegroups.com.
