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May 22, 2025
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Docs for Fleet advanced config in ECK #1446

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1b63c8c
Docs for Fleet advanced config in ECK
pebrc May 21, 2025
a55ec65
review feedback: typo
pebrc May 21, 2025
5040418
figuring out the applies_to syntax
pebrc May 21, 2025
9863c1c
integrate applies_to into the sentence
pebrc May 21, 2025
bbfc4a5
Update reference/fleet/advanced-kubernetes-managed-by-fleet.md
pebrc May 21, 2025
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17 changes: 16 additions & 1 deletion deploy-manage/deploy/cloud-on-k8s/configuration-fleet.md
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Expand Up @@ -146,8 +146,23 @@ By default, every reference targets all instances in your {{es}}, {{kib}} and {{

## Customize {{agent}} configuration [k8s-elastic-agent-fleet-configuration-custom-configuration]

In contrast to {{agents}} in standalone mode, the configuration is managed through {{fleet}}, and it cannot be defined through `config` or `configRef` elements.
In contrast to {{agents}} in standalone mode, the configuration is managed through {{fleet}}, and it cannot be defined through `config` or `configRef` elements with a few exceptions.

One of those exceptions is the configuration of providers as described in [advanced Agent configuration managed by Fleet](/reference/fleet/advanced-kubernetes-managed-by-fleet.md). When {{agent}} is managed by {{fleet}} and is orchestrated by ECK, the configuration of providers can simply be done through the `.spec.config` element in the Agent resource as of {applies_to}`stack: ga 8.13`:

```yaml
apiVersion: agent.k8s.elastic.co/v1alpha1
kind: Agent
metadata:
name: elastic-agent
spec:
config:
fleet:
enabled: true
providers.kubernetes:
add_resource_metadata:
deployment: true
```

## Upgrade the {{agent}} specification [k8s-elastic-agent-fleet-configuration-upgrade-specification]

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1 change: 1 addition & 0 deletions reference/fleet/advanced-kubernetes-managed-by-fleet.md
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Expand Up @@ -106,4 +106,5 @@ volumes:

1. By default the manifests for {{agent}} managed by {{fleet}} have `hostNetwork:true`. In order to support multiple installations of {{agent}}s in the same node you should set `hostNetwork:false`. See this relevant [example](https://github.com/elastic/elastic-agent/tree/main/docs/manifests/hostnetwork) as described in [{{agent}} Manifests in order to support Kube-State-Metrics Sharding](https://github.com/elastic/elastic-agent/blob/main/docs/elastic-agent-ksm-sharding.md).
2. The volume `/usr/share/elastic-agent/state` must remain mounted in [elastic-agent-managed-kubernetes.yaml](https://github.com/elastic/elastic-agent/blob/main/deploy/kubernetes/elastic-agent-managed-kubernetes.yaml), otherwise custom config map provided above will be overwritten.
3. If {{agent}} is deployed through ECK, you can define the provider configuration in the `spec.config` field of the Kubernetes custom resource. Refer to [{{fleet}}-managed {{agent}} on ECK](/deploy-manage/deploy/cloud-on-k8s/configuration-fleet.md) for details.

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