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docs(installation): Add post install instructions for NATS replication #2455

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Oct 10, 2024
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docs(installation): Add post install instructions for NATS replication #2455

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18 changes: 17 additions & 1 deletion ...nstallation/04.Production-installation-with-kubernetes/03.Mender-server/docs.md
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Expand Up @@ -371,7 +371,23 @@ metadata:
nginx.org/websocket-services: mender-api-gateway
```

## Create the admin user
## Post-installation setup

### Enable replication for NATS Jetstream (Recommended)
For production setup that require high availablility, we recommend enabling replication for the NATS Jetstream work queues.
By default, NATS deploys 3 replicas, but the stream created by the workflows service does not have replication enabled and therefore has no fault tolerance.
The following snippet increases the number of replicas to 3.

!!!! Please replace `NATS_URL` in the following snippet with a URL that resolves to any of the NATS pods.

```bash
NATS_URL="nats://mender-nats" # REPLACE
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NATS_URL="nats://mender-nats" # REPLACE
NATS_URL="nats://mender-nats" # set to your own nats URL

kubectl run --env=NATS_URL=$NATS_URL --image=natsio/nats-box:0.14.5-nonroot \
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kubectl run --env=NATS_URL=$NATS_URL --image=natsio/nats-box:0.14.5-nonroot \
kubectl run --env=NATS_URL='$NATS_URL" --image=natsio/nats-box:0.14.5-nonroot \

nats-increase-replicas -- \
nats stream edit WORKFLOWS --force --replicas=3
```

### Create the admin user

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[ui-tab title="Open Source"]
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