Christopher Moyer
45 lines
1.8 KiB
Markdown
45 lines
1.8 KiB
Markdown
---
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aliases:
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- /docs/grafana/latest/alerting/high-availability/enable-alerting-ha/
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- /docs/grafana/latest/alerting/unified-alerting/high-availability/
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description: Enable alerting high availability
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keywords:
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- grafana
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- alerting
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- tutorials
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- ha
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- high availability
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title: Enable alerting high availability
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weight: 450
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---
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# Enable alerting high availability
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You can enable [alerting high availability]({{< relref "_index.md" >}}) support by updating the Grafana configuration file. On Kubernetes, you can enable alerting high availability by updating the Kubernetes container definition.
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## Update Grafana configuration file
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### Before you begin
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Since gossiping of notifications and silences uses both TCP and UDP port `9094`, ensure that each Grafana instance is able to accept incoming connections on these ports.
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**To enable high availability support:**
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1. In your custom configuration file ($WORKING_DIR/conf/custom.ini), go to the `[unified_alerting]` section.
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2. Set `[ha_peers]` to the number of hosts for each Grafana instance in the cluster (using a format of host:port), for example, `ha_peers=10.0.0.5:9094,10.0.0.6:9094,10.0.0.7:9094`.
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You must have at least one (1) Grafana instance added to the [`[ha_peer]` section.
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3. Set `[ha_listen_address]` to the instance IP address using a format of `host:port` (or the [Pod's](https://kubernetes.io/docs/concepts/workloads/pods/) IP in the case of using Kubernetes).
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By default, it is set to listen to all interfaces (`0.0.0.0`).
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## Update Kubernetes container definition
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If you are using Kubernetes, you can expose the pod IP [through an environment variable](https://kubernetes.io/docs/tasks/inject-data-application/environment-variable-expose-pod-information/) via the container definition such as:
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```bash
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env:
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- name: POD_IP
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valueFrom:
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fieldRef:
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fieldPath: status.podIP
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```
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