myasnikovdaniil 858478cf70 [Backport release-1.6] fix(monitoring): send alerts to every Alertmanager replica (#4890)
## What this PR does

Backport of #4889 to `release-1.6`. The commit is cherry-picked from
9d4221b89. The only conflict was in `templates/_helpers.tpl`, which is
shorter on this branch, so the new `monitoring.alertmanager.replicas`
helper is appended to the release-1.6 file and nothing else from main
comes along.

The vmalert and VMAlertmanager templates here are the same as on main
before the fix, a single notifier on the shared Service and
`replicaCount: 3`, so the change applies as is. The monitoring chart
tests pass on this branch, 7 suites and 50 tests, the new suite
included.

### Screenshots

Not a UI change.

### Downstream repositories

- [x] No downstream repository is affected by this change
- [ ] [cozystack/website](https://github.com/cozystack/website) -
follow-up:
- [ ]
[cozystack/terraform-provider-cozystack](https://github.com/cozystack/terraform-provider-cozystack)
- follow-up:
- [ ]
[cozystack/ansible-cozystack](https://github.com/cozystack/ansible-cozystack)
- follow-up:
- [ ] [cozystack/ccp](https://github.com/cozystack/ccp) - follow-up:
- [ ] [cozystack/talm](https://github.com/cozystack/talm) - follow-up:
- [ ] [cozystack/cozyhr](https://github.com/cozystack/cozyhr) -
follow-up:
- [ ] [cozystack/cozy-proxy](https://github.com/cozystack/cozy-proxy) -
follow-up:
- [ ]
[cozystack/cozystack-telemetry-server](https://github.com/cozystack/cozystack-telemetry-server)
- follow-up:
- [ ]
[cozystack/external-apps-example](https://github.com/cozystack/external-apps-example)
- follow-up:
- [ ] [cozystack/examples](https://github.com/cozystack/examples) -
follow-up:
- [ ] [cozystack/community](https://github.com/cozystack/community) -
follow-up:

Same diff as #4889, two templates, the helpers and a test file of
`packages/system/monitoring`, so no trigger map entry applies.

### Release note

```release-note
fix(monitoring): vmalert now sends alerts to every Alertmanager replica instead of the shared Service, so the Alertmanager cluster deduplicates them and a long-running alert no longer produces repeated firing and resolved notifications.
```
2026-10-14 18:30:14 +05:00
2025-10-08 09:43:34 +05:00
2025-04-01 18:48:14 +02:00
2024-02-08 12:04:32 +01:00

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Cozystack

Cozystack is a free platform and framework for building clouds.

Cozystack is a CNCF Sandbox Level Project that was originally built and sponsored by Ænix.

With Cozystack, you can transform a bunch of servers into an intelligent system with a simple REST API for spawning Kubernetes clusters, Database-as-a-Service, virtual machines, load balancers, HTTP caching services, and other services with ease.

Use Cozystack to build your own cloud or provide a cost-effective development environment.

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