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Alerting: Add support for Redis Sentinel for Alerting HA (#106322)

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* Alerting: Add support for Redis Sentinel

* docs

* docs

* Use minisentinel in test

* Apply suggestions from code review

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>
Co-authored-by: Fayzal Ghantiwala <114010985+fayzal-g@users.noreply.github.com>

* "address(es)" -> "address or addresses"

* make update-workspace

* make lint-go-diff

---------

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>
Co-authored-by: Fayzal Ghantiwala <114010985+fayzal-g@users.noreply.github.com>
This commit is contained in:
Vadim Stepanov
2025-06-05 15:02:40 +01:00
committed by GitHub
co-authored by Johnny Kartheiser Fayzal Ghantiwala
parent 941162ca79
commit 5137995830
11 changed files with 292 additions and 80 deletions
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docs/sources/alerting/set-up/configure-high-availability/_index.md
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@@ -67,7 +67,7 @@ For a demo, see this [example using Docker Compose](https://github.com/grafana/a
## Enable alerting high availability using Redis
As an alternative to Memberlist, you can configure Redis to enable high availability. Only **Redis Server** and **Redis Cluster** modes are supported.
As an alternative to Memberlist, you can configure Redis to enable high availability. Redis standalone, Redis Cluster and Redis Sentinel modes are supported.
{{% admonition type="note" %}}
@@ -77,8 +77,11 @@ Memberlist is the preferred option for high availability. Use Redis only in envi
1. Make sure you have a Redis server that supports pub/sub. If you use a proxy in front of your Redis cluster, make sure the proxy supports pub/sub.
1. In your custom configuration file ($WORKING_DIR/conf/custom.ini), go to the `[unified_alerting]` section.
1. Set `ha_redis_address` to the Redis server address Grafana should connect to.
1. Set `ha_redis_address` to the Redis server address or addresses Grafana should connect to. It can be a single Redis address if using Redis standalone, or a list of comma-separated addresses if using Redis Cluster or Sentinel.
1. Optional: Set `ha_redis_cluster_mode_enabled` to `true` if you are using Redis Cluster.
1. Optional: Set `ha_redis_sentinel_mode_enabled` to `true` if you are using Redis Sentinel. Also set `ha_redis_sentinel_master_name` to the Redis Sentinel master name.
1. Optional: Set the username and password if authentication is enabled on the Redis server using `ha_redis_username` and `ha_redis_password`.
1. Optional: Set the username and password if authentication is enabled on Redis Sentinel using `ha_redis_sentinel_username` and `ha_redis_sentinel_password`.
1. Optional: Set `ha_redis_prefix` to something unique if you plan to share the Redis server with multiple Grafana instances.
1. Optional: Set `ha_redis_tls_enabled` to `true` and configure the corresponding `ha_redis_tls_*` fields to secure communications between Grafana and Redis with Transport Layer Security (TLS).
1. Set `[ha_advertise_address]` to `ha_advertise_address = "${POD_IP}:9094"` This is required if the instance doesn't have an IP address that is part of RFC 6890 with a default route.