Root$ kubectl -n logging get pods -o wide This makes sure that our Filebeat DaemonSet schedules a pod on the master node as well. Once the Filebeat DaemonSet is deployed we can check if our pods get scheduled properly. Please note the following settings in the manifest:.In case you already have an Elasticsearch cluster running the env var should be set to point to it. We have set the env var ELASTICSEARCH_HOST to elasticsearch.elasticsearch to refer to the Elasticsearch client service which was created in part 1 of this article.We are mounting this directory from the host to the Filebeat pod and then Filebeat processes the logs according to the provided configuration. Logs for each pod are written to /var/log/docker/containers.# data folder stores a registry of read status for all files, so we don't send everything again on a Filebeat pod restart MountPath: /usr/share/filebeat/filebeat.yml # If using Red Hat OpenShift uncomment this: "-c", "/usr/share/filebeat/filebeat.yml", Use the manifest below to deploy the Filebeat DaemonSet. This is helpful when we try to filter logs specific to a particular worker node. Cloud metadata processor includes some host-specific fields in the log entry.Alternatively, this can also point to Redis, Logstash, Kafka, or even a File. The output is set to Elasticsearch because we are using Elasticsearch as the storage backend.We can also use different multiline patterns for different namespaces. We can also filter logs for a particular namespace and then process the log entries accordingly.These labels can be later used to filter logs in the Kibana console. include_labels: Setting this to true enables Filebeat to retain any pod labels for a particular log entry.These annotations can be later used to filter logs in the Kibana console. include_annotations: Setting this to true enables Filebeat to retain any pod annotation for a particular log entry.We can specify different multiline patterns and various other types of config. By using this we can use pod annotations to pass config directly to Filebeat pod. hints.enabled: This activates Filebeat’s hints module for Kubernetes.Important concepts for the Filebeat ConfigMap: Kubernetes.namespace: myapp #Set the namespace in which your app is running, can add multiple conditions in case of more than 1 namespace. Use the following manifest to create a ConfigMap which will be used by Filebeat pods. If either of the pods associated with this service account gets compromised then the attacker would not be able to gain access to the entire cluster or applications running in it. We should make sure that ClusterRole permissions are as limited as possible from the security point of view. apiGroups: # "" indicates the core API group
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