replaced ascii image with png image (#47032) (#47057)

(cherry picked from commit d3b2ffed35)

Co-authored-by: achatterjee-grafana <70489351+achatterjee-grafana@users.noreply.github.com>
This commit is contained in:
Grot (@grafanabot)
2022-03-30 09:25:38 -04:00
committed by GitHub
co-authored by achatterjee-grafana
parent 13fc39def9
commit a6e58b7e3a
@@ -1,5 +1,5 @@
+++
title = " Configure high availability"
title = " High availability"
description = "High Availability"
keywords = ["grafana", "alerting", "tutorials", "ha", "high availability"]
weight = 450
@@ -11,25 +11,7 @@ The Grafana alerting system has two main components: a `Scheduler` and an intern
When it comes to running Grafana alerting in high availability the operational mode of the scheduler is unaffected such that all alerts continue be evaluated in each Grafana instance. Rather the operational change happens in the Alertmanager which **deduplicates** alert notifications across Grafana instances.
```
.─────.
╱ ╲ ┌────────────────┐
( User )──────┐ ┌──────────────────────────────────┐ │ │
`. ,' │ │┌─────────┐ ┌──────────────┐ │ │ ▼
`───' │ ││Scheduler│──────▶Alertmananager│─┼──┘ ┌──────────────────────┐
│ ┌───────────┐ ┌─▶│└─────────┘ ▲──────────────┤ │ │ │
.─────. │ │ Load │ │ │Grafana │ │ │ │ │
╱ ╲ │ │ Balancing │ │ └─────────────────┼──────────────┼─┘ │ Integrations │
( User )──────┼─────▶│ Reverse │──┤ ┌─────────────────┼──────────────┼─┐ │ │
`. ,' │ │ Proxy │ │ │┌─────────┐ ├──────────────▼ │ │ │
`───' │ └───────────┘ │ ││Scheduler│──────▶Alertmananager│─┼──┐ └──────────────────────┘
│ └─▶│└─────────┘ └──────────────┘ │ │ ▲
.─────. │ │Grafana │ │ │
╱ ╲ │ └──────────────────────────────────┘ └────────────────┘
( User )──────┘
`. ,'
`───'
```
{{< figure src="/static/img/docs/alerting/unified/high-availability-ua.png" class="docs-image--no-shadow" max-width= "750px" caption="High availability" >}}
The coordination between Grafana instances happens via [a Gossip protocol](https://en.wikipedia.org/wiki/Gossip_protocol). Alerts are not gossiped between instances. It is expected that each scheduler delivers the same alerts to each Alertmanager.