Filebeat errors while connecting to kubernetes API on start filebeat POD

Hello!

On our k8s infrastructure, we are face to the connection issue while starting the filebeat POD.
Affected filebeat versions are 6.4.0, 7.0.
Log record is:

ERROR kubernetes/kubernetes.go:127 Error starting kubernetes autodiscover provider: performing request: Get https://10.96.0.1:443/api/v1/pods?fieldSelector=spec.nodeName%3Dlocalhost&resourceVersion=0: dial tcp 10.96.0.1:443: connect: connection refused

The k8s manifest configuration is:

filebeat-daemonset.yml
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: filebeat-config-json
  labels:
    k8s-app: filebeat
data:
  filebeat.yml: |-
    filebeat.registry_file: "/opt/filebeat/registry"
    logging.to_stderr: true
    filebeat.autodiscover:
      providers:
        - type: kubernetes
          include_annotations: ["logging"]
          templates:
            - condition:
                equals:
                  kubernetes.annotations.logging: "plain"
              config:
                - type: docker
                  containers.ids:
                    - "${data.kubernetes.container.id}"
                  processors:
                    - add_cloud_metadata: ~
    processors:
      - drop_fields:
          fields: ["host"]
    output.logstash:
      hosts: ["logstash-host:9200"]
    logging:
      to_files: true
      files:
        path: "/opt/filebeat/logs"
        name: filebeat.log
        rotateeverybytes: 10485760 # = 10MB
        keepfiles: 7
      level: info

---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: filebeat-daemon
  labels:
    k8s-app: filebeat
spec:
  selector:
    matchLabels:
      name: filebeat
      k8s-app: filebeat
  template:
    metadata:
      labels:
        name: filebeat
        k8s-app: filebeat
    spec:
      containers:
        - name: filebeat-container
          image: docker-registry-host/shared/filebeat
          volumeMounts:
            - mountPath: /var/lib/docker/containers
              name: filebeat-log-source
            - name: filebeat-config
              mountPath: /opt/filebeat
            - name: varlogcont
              mountPath: /var/log/containers
              readOnly: true
            - name: varlogpods
              mountPath: /var/log/pods
              readOnly: true
      imagePullSecrets:
        - name: regcred
      volumes:
        - name: filebeat-log-source
          hostPath:
            path: /var/lib/docker/containers
            type: DirectoryOrCreate
        - name: filebeat-config
          configMap:
            defaultMode: 0644
            name: filebeat-config-json
        - name: varlogcont
          hostPath:
            path: /var/log/containers
            type: DirectoryOrCreate
        - name: varlogpods
          hostPath:
            path: /var/log/pods
            type: DirectoryOrCreate
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: filebeat
subjects:
- kind: ServiceAccount
  name: default
  namespace: default
roleRef:
  kind: ClusterRole
  name: filebeat
  apiGroup: rbac.authorization.k8s.io
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
  name: filebeat
  labels:
    k8s-app: filebeat
rules:
- apiGroups: [""] # "" indicates the core API group
  resources:
  - namespaces
  - pods
  verbs:
  - get
  - watch
  - list
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: filebeat
  namespace: default
  labels:
    k8s-app: filebeat

The log messages are:

log-messages

...
2019-07-25T03:23:53.420Z WARN [cfgwarn] kubernetes/kubernetes.go:51 BETA: The kubernetes autodiscover is beta
2019-07-25T03:23:53.421Z INFO kubernetes/util.go:86 kubernetes: Using pod name filebeat-daemon-srjr4 and namespace default to discover kubernetes node
2019-07-25T03:23:53.423Z ERROR kubernetes/util.go:90 kubernetes: Querying for pod failed with error: %!(EXTRA string=performing request: Get https://10.96.0.1:443/api/v1/namespaces/default/pods/filebeat-daemon-srjr4: dial tcp 10.96.0.1:443: connect: connection refused)
2019-07-25T03:23:53.423Z INFO autodiscover/autodiscover.go:105 Starting autodiscover manager
2019-07-25T03:23:53.423Z INFO kubernetes/watcher.go:180 kubernetes: Performing a resource sync for *v1.PodList
2019-07-25T03:23:53.424Z ERROR kubernetes/watcher.go:183 kubernetes: Performing a resource sync err performing request: Get https://10.96.0.1:443/api/v1/pods?fieldSelector=spec.nodeName%3Dlocalhost&resourceVersion=0: dial tcp 10.96.0.1:443: connect: connection refused for *v1.PodList
2019-07-25T03:23:53.424Z ERROR kubernetes/kubernetes.go:127 Error starting kubernetes autodiscover provider: performing request: Get https://10.96.0.1:443/api/v1/pods?fieldSelector=spec.nodeName%3Dlocalhost&resourceVersion=0: dial tcp 10.96.0.1:443: connect: connection refused
2019-07-25T03:24:23.418Z INFO [monitoring] log/log.go:141 Non-zero metrics in the last 30s {"monitoring": {"metrics": {"beat":{"cpu":{"system":{"ticks":30,"time":{"ms":33}},"total":{"ticks":60,"time":{"ms":63},"value":60},"user":{"ticks":30,"time":{"ms":30}}},"info":{"ephemeral_id":"03762f04-9dd8-416e-829c-d9bcba1fde01","uptime":{"ms":30020}},"memstats":{"gc_next":4194304,"memory_alloc":1571712,"memory_total":3527480,"rss":19968000}},"filebeat":{"harvester":{"open_files":0,"running":0}},"libbeat":{"config":{"module":{"running":0}},"output":{"type":"logstash"},"pipeline":{"clients":0,"events":{"active":0}}},"registrar":{"states":{"current":0},"writes":{"success":1,"total":1}},"system":{"cpu":{"cores":2},"load":{"1":5.7,"15":4.33,"5":4.47,"norm":{"1":2.85,"15":2.165,"5":2.235}}}}}}

While investigating this issue, we found the temporary solution on the StackOverflow:

but the solution depends on sleep, that we do not predict on different infrastructures.
The suggested solution is to retry on start in the k8s client.
Also, we found these issues on Beats GitHub about current kubernetes client in


and

My questions are there are plans to fix those issues and on which dates?

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