dnsmasq container in kube-dns pod has an undefined liveness probe

[vannrt]

root@isv-vteves-169-10-105-16-5platform9:/tmp# /opt/bin/kubectl describe pods kube-dns-86f4d74b45-fjpd4 --namespace=kube-system
Name:           kube-dns-86f4d74b45-fjpd4
Namespace:      kube-system
Node:           10.105.16.5/10.105.16.5
Start Time:     Thu, 29 Nov 2018 22:46:36 +0000
Labels:         k8s-app=kube-dns
                pod-template-hash=4290830601
Annotations:    <none>
Status:         Running
IP:             10.99.0.2
Controlled By:  ReplicaSet/kube-dns-86f4d74b45
Containers:
  kubedns:
    Container ID:  docker://6b1ac528519e60add23bfa9caac676880b2060a309ff0c34971ae751ae15edfb
    Image:         k8s.gcr.io/k8s-dns-kube-dns-amd64:1.14.8
    Image ID:      docker://sha256:80cc5ea4b547abe174d7550b82825ace40769e977cde90495df3427b3a0f4e75
    Ports:         10053/UDP, 10053/TCP, 10055/TCP
    Host Ports:    0/UDP, 0/TCP, 0/TCP
    Args:
      --domain=cluster.local.
      --dns-port=10053
      --config-dir=/kube-dns-config
      --v=2
    State:          Running
      Started:      Fri, 30 Nov 2018 00:21:08 +0000
    Last State:     Terminated
      Reason:       Error
      Exit Code:    137
      Started:      Fri, 30 Nov 2018 00:18:57 +0000
      Finished:     Fri, 30 Nov 2018 00:21:07 +0000
    Ready:          True
    Restart Count:  6
    Limits:
      memory:  170Mi
    Requests:
      cpu:      100m
      memory:   70Mi
    Liveness:   http-get http://:10054/healthcheck/kubedns delay=60s timeout=5s period=10s #success=1 #failure=5
    Readiness:  http-get http://:8081/readiness delay=3s timeout=5s period=10s #success=1 #failure=3
    Environment:
      PROMETHEUS_PORT:  10055
    Mounts:
      /kube-dns-config from kube-dns-config (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from kube-dns-token-pmvds (ro)
  dnsmasq:
    Container ID:  docker://36250a7b298ea93764a5aa56381667994fb61d9a2d73b7092144994194c31574
    Image:         k8s.gcr.io/k8s-dns-dnsmasq-nanny-amd64:1.14.8
    Image ID:      docker://sha256:c2ce1ffb51ed60c54057f53b8756231f5b4b792ce04113c6755339a1beb25943
    Ports:         53/UDP, 53/TCP
    Host Ports:    0/UDP, 0/TCP
    Args:
      -v=2
      -logtostderr
      -configDir=/etc/k8s/dns/dnsmasq-nanny
      -restartDnsmasq=true
      --
      -k
      --cache-size=1000
      --no-negcache
      --log-facility=-
      --server=/cluster.local/127.0.0.1#10053
      --server=/in-addr.arpa/127.0.0.1#10053
      --server=/ip6.arpa/127.0.0.1#10053
    State:          Running
      Started:      Fri, 30 Nov 2018 00:24:41 +0000
    Last State:     Terminated
      Reason:       Error
      Exit Code:    137
      Started:      Fri, 30 Nov 2018 00:17:40 +0000
      Finished:     Fri, 30 Nov 2018 00:19:41 +0000
    Ready:          True
    Restart Count:  14
    Requests:
      cpu:        150m
      memory:     20Mi
    Liveness:     http-get http://:10054/healthcheck/dnsmasq delay=60s timeout=5s period=10s #success=1 #failure=5
    Environment:  <none>
    Mounts:
      /etc/k8s/dns/dnsmasq-nanny from kube-dns-config (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from kube-dns-token-pmvds (ro)
  sidecar:
    Container ID:  docker://6e55d4b8703d5db1a3637a131664f772b9bcf612c60726df76228af341b0c25d
    Image:         k8s.gcr.io/k8s-dns-sidecar-amd64:1.14.8
    Image ID:      docker://sha256:6f7f2dc7fab5d7e7f99dc4ac176683a981a9ff911d643b9f29ffa146838deda3
    Port:          10054/TCP
    Host Port:     0/TCP
    Args:
      --v=2
      --logtostderr
      --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.cluster.local,5,SRV
      --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.cluster.local,5,SRV
    State:          Running
      Started:      Fri, 30 Nov 2018 00:20:36 +0000
    Last State:     Terminated
      Reason:       Error
      Exit Code:    2
      Started:      Fri, 30 Nov 2018 00:14:18 +0000
      Finished:     Fri, 30 Nov 2018 00:17:43 +0000
    Ready:          True
    Restart Count:  11
    Requests:
      cpu:        10m
      memory:     20Mi
    Liveness:     http-get http://:10054/metrics delay=60s timeout=5s period=10s #success=1 #failure=5
    Environment:  <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from kube-dns-token-pmvds (ro)
Conditions:
  Type           Status
  Initialized    True
  Ready          True
  PodScheduled   True
Volumes:
  kube-dns-config:
    Type:      ConfigMap (a volume populated by a ConfigMap)
    Name:      kube-dns
    Optional:  true
  kube-dns-token-pmvds:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  kube-dns-token-pmvds
    Optional:    false
QoS Class:       Burstable
Node-Selectors:  <none>
Tolerations:     CriticalAddonsOnly
                 node-role.kubernetes.io/master:NoSchedule
                 node.kubernetes.io/not-ready:NoExecute for 300s
                 node.kubernetes.io/unreachable:NoExecute for 300s
Events:
  Type     Reason     Age                From                  Message
  ----     ------     ----               ----                  -------
  Normal   Pulled     29m (x9 over 1h)   kubelet, 10.105.16.5  Container image "k8s.gcr.io/k8s-dns-dnsmasq-nanny-amd64:1.14.8" already present on machine
  Normal   Created    29m (x9 over 1h)   kubelet, 10.105.16.5  Created container
  Normal   Killing    29m (x8 over 1h)   kubelet, 10.105.16.5  Killing container with id docker://dnsmasq:Container failed liveness probe.. Container will be killed and recreated.
  Normal   Started    29m (x9 over 1h)   kubelet, 10.105.16.5  Started container
  Normal   Pulled     29m (x7 over 1h)   kubelet, 10.105.16.5  Container image "k8s.gcr.io/k8s-dns-sidecar-amd64:1.14.8" already present on machine
  Normal   Created    29m (x7 over 1h)   kubelet, 10.105.16.5  Created container
  Warning  Unhealthy  21m (x40 over 1h)  kubelet, 10.105.16.5  Liveness probe failed: HTTP probe failed with statuscode: 503
  Warning  BackOff    11m (x40 over 1h)  kubelet, 10.105.16.5  Back-off restarting failed container

The dnsmasq container above has the following liveness probe:
Liveness: http-get http://:10054/metrics delay=60s timeout=5s period=10s #success=1 #failure=5