Issue: Pod showing Unavailable "coredns-648988c467-7mw6p"
Image name : :443/rancher/coredns-coredns:1.6.9
Logs
E1207 16:01:28.965594 1 reflector.go:153] pkg/mod/k8s.io/client-go@v0.17.4/tools/cache/reflector.go:105: Failed to list *v1.Endpoints: Get “https://10.43.0.1:443/api/v1/endpoints?limit=500&resourceVersion=0”: dial tcp 10.43.0.1:443: i/o timeout
[INFO] plugin/ready: Still waiting on: “kubernetes”
OS
Static hostname: kwdpsom
Icon name: computer-vm
Chassis: vm
Machine ID: 01822d25612142de9aa7c58f6b9b24e3
Boot ID: b50f3381733949719035b7130d0a2b63
Virtualization: vmware
Operating System: Red Hat Enterprise Linux 8.1 (Ootpa)
CPE OS Name: cpe:/o:redhat:enterprise_linux:8.1:GA
Kernel: Linux 4.18.0-240.1.1.el8_3.x86_64
Architecture: x86-64
Deployment Information
Two Server Setup
Server 1. etcd, ControlPlane
Server 2. Workernode
Rancher : v2.5.2
Kubernetes : v1.18.10
Docker : 19.3.13
Setup Type: private docker registry
kubectl describe pod coredns-648988c467-7mw6p -n kube-system
Name: coredns-648988c467-7mw6p
Namespace: kube-system
Priority: 2000000000
Priority Class Name: system-cluster-critical
Node: kwdpsom/192.168.20.75
Start Time: Mon, 07 Dec 2020 20:34:07 +0530
Labels: k8s-app=kube-dns
pod-template-hash=648988c467
Annotations: cattle.io/timestamp: 2020-12-07T15:03:59Z
cni.projectcalico.org/podIP: 10.42.1.9/32
cni.projectcalico.org/podIPs: 10.42.1.9/32
field.cattle.io/ports:
[[{“containerPort”:53,“dnsName”:“coredns”,“kind”:“ClusterIP”,“name”:“dns”,“protocol”:“UDP”},{“containerPort”:53,“dnsName”:“coredns”,“kind”…
seccomp.security.alpha.kubernetes.io/pod: docker/default
Status: Running
IP: 10.42.1.9
IPs:
IP: 10.42.1.9
Controlled By: ReplicaSet/coredns-648988c467
Containers:
coredns:
Container ID: docker://5eb1314275e06675ff92fc5f250d59c13406643fe68b867586837a7a92560230
Image: myrepo:443/rancher/coredns-coredns:1.6.9
Image ID: docker-pullable://myrepo:443/rancher/coredns-coredns@sha256:6dbdd57f6b7b991d75a677f8b011106a065e3b309217611ed58e68ce4b0e792a
Ports: 53/UDP, 53/TCP, 9153/TCP
Host Ports: 0/UDP, 0/TCP, 0/TCP
Args:
-conf
/etc/coredns/Corefile
State: Running
Started: Mon, 07 Dec 2020 20:34:08 +0530
Ready: False
Restart Count: 0
Limits:
memory: 170Mi
Requests:
cpu: 100m
memory: 70Mi
Liveness: http-get http://:8080/health delay=60s timeout=5s period=10s #success=1 #failure=5
Readiness: http-get http://:8181/ready delay=0s timeout=1s period=10s #success=1 #failure=3
Environment:
Mounts:
/etc/coredns from config-volume (ro)
/var/run/secrets/kubernetes.io/serviceaccount from coredns-token-564qp (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
config-volume:
Type: ConfigMap (a volume populated by a ConfigMap)
Name: coredns
Optional: false
coredns-token-564qp:
Type: Secret (a volume populated by a Secret)
SecretName: coredns-token-564qp
Optional: false
QoS Class: Burstable
Node-Selectors: beta.kubernetes.io/os=linux
Tolerations: :NoExecuteop=Exists
:NoScheduleop=Exists
CriticalAddonsOnly op=Exists
Events:
Type Reason Age From Message
Warning Unhealthy 3m5s (x361 over 63m) kubelet Readiness probe failed: HTTP probe failed with statuscode: 503