Running Auditbeat on Kubernetes
Auditbeat Docker images can be used on Kubernetes to check files integrity.
Running Elastic Cloud on Kubernetes? See Run Beats on ECK.
However, version 9.0.0-beta1 of Auditbeat has not yet been released, so no Docker image is currently available for this version.
By deploying Auditbeat as a DaemonSet we ensure we get a running instance on each node of the cluster.
Everything is deployed under kube-system namespace, you can change that by updating the YAML file.
To get the manifests just run:
curl -L -O https://raw.githubusercontent.com/elastic/beats/master/deploy/kubernetes/auditbeat-kubernetes.yaml
If you are using Kubernetes 1.7 or earlier: Auditbeat uses a hostPath volume to persist internal data, it’s located under /var/lib/auditbeat-data. The manifest uses folder autocreation (DirectoryOrCreate), which was introduced in Kubernetes 1.8. You will need to remove type: DirectoryOrCreate from the manifest and create the host folder yourself.
Some parameters are exposed in the manifest to configure logs destination, by default they will use an existing Elasticsearch deploy if it’s present, but you may want to change that behavior, so just edit the YAML file and modify them:
- name: ELASTICSEARCH_HOST
value: elasticsearch
- name: ELASTICSEARCH_PORT
value: "9200"
- name: ELASTICSEARCH_USERNAME
value: elastic
- name: ELASTICSEARCH_PASSWORD
value: changeme
Kubernetes control plane nodes can use taints to limit the workloads that can run on them. To run Auditbeat on control plane nodes you may need to update the Daemonset spec to include proper tolerations:
spec:
tolerations:
- key: node-role.kubernetes.io/control-plane
effect: NoSchedule
To deploy Auditbeat to Kubernetes just run:
kubectl create -f auditbeat-kubernetes.yaml
Then you should be able to check the status by running:
$ kubectl --namespace=kube-system get ds/auditbeat
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE-SELECTOR AGE
auditbeat 32 32 0 32 0 <none> 1m
Auditbeat is able to monitor the file integrity of files in pods, to do that, the directories with the container root file systems have to be mounted as volumes in the Auditbeat container. For example, containers executed with containerd have their root file systems under /run/containerd. The reference manifest contains an example of this.