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Map data

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Map data

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This functionality is in technical preview and may be changed or removed in a future release. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features.

The Elastic Maps Server Docker image contains only a few zoom levels of data. To get the map data up to the highest zoom level, Elastic Maps Server needs a basemap file mounted into its container.

Basemap download

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You have to download the basemap ahead of time on a machine that is not air-gapped and populate a volume that can be mounted into the Elastic Maps Server Pods. Check also the Elastic Maps Server documentation.

The procedure on how to get a Kubernetes volume populated with that data is outside the scope of this document, as it depends on your specific Kubernetes setup and choice of volume provisioner. This is a possible approach that works for most setups:

Download the basemap zip archive using the link shown in the Elastic Maps Server UI or extracted from the /status endpoint.

Create a PersistentVolumeClaim of sufficient size (> 90G for the maximal resolution) and a temporary Pod to mount the corresponding volume.

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: ems-basemap
spec:
  storageClassName: "standard"
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 250G
---
kind: Pod
apiVersion: v1
metadata:
  name: ems-data-setup
spec:
  terminationGracePeriodSeconds: 0
  volumes:
    - name: ems-storage
      persistentVolumeClaim:
       claimName: ems-basemap
  containers:
    - name: ems-setup
      image: ubuntu
      command: [bash, -c, "apt-get update && apt-get install unzip && while true; do sleep 10; done"]
      volumeMounts:
        - mountPath: "/usr/share/planet"
          name: ems-storage

Use kubectl to copy the basemap data into the volume

kubectl cp planet.zip ems-data-setup:/usr/share/planet/planet.zip

Unzip the archive on the temporary Pod

kubectl exec ems-data-setup -- unzip /usr/share/data/planet.zip -d /usr/share/planet

Delete the temporary Pod and remount the volume into the Elastic Maps Server Pods as described in Pod configuration.
```
kubectl delete pod ems-data-setup
```

Pod configuration

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You can customize the Elastic Maps Server Pod using a Pod template.

The following example demonstrates how to create a Elastic Maps Server deployment which mounts a data volume with the complete basemap.

apiVersion: maps.k8s.elastic.co/v1alpha1
kind: ElasticMapsServer
metadata:
  name: quickstart
spec:
  version: 8.16.1
  count: 1
  podTemplate:
    spec:
      containers:
      - name: maps
        volumeMounts:
        - name: map-data
          readOnly: true
          mountPath: /usr/src/app/data
      volumes:
        - name: map-data
          persistentVolumeClaim:
            claimName: ems-basemap

The name of the container in the Pod template must be maps.

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