coredns 1.2.2 反复重启问题

    此环境是有TF(tungstenfabric) 部署的，采用的k8s版本是1.12，coredns是1.2.2

pod就是循环重启

[root@opcontroller ~]# kubectl get pod -n kube-system -o wide
NAME                                               READY   STATUS                 RESTARTS   AGE    IP                 NODE           NOMINAT NODE
coredns-576cbf47c7-v4hkl                0/1     CrashLoopBackOff   36           161m               10.47.255.251   opcompute      <none>
coredns-576cbf47c7-xtrfb                 0/1     CrashLoopBackOff   36           160m               10.47.255.252   opcompute      <none>

[root@opcontroller ~]# kubectl  describe   pod coredns-576cbf47c7-v4hkl  -n kube-system

解决办法:

  1 [root@opcontroller ~]# kubectl get cm coredns -o yaml -n kube-system
  2 apiVersion: v1
  3 data:
  4   Corefile: |
  5     .:53 {
  6         errors
  7         health
  8         kubernetes cluster.local in-addr.arpa ip6.arpa {
  9            pods insecure
 10            upstream
 11            fallthrough in-addr.arpa ip6.arpa
 12         }
 13         prometheus :9153
 14         proxy . /etc/resolv.conf
 15         cache 30
 16         loop  #删除此处即可
 17         reload
 18         loadbalance
 19     }
 20 kind: ConfigMap
 21 metadata:
 22   creationTimestamp: 2020-01-03T23:56:52Z
 23   name: coredns
 24   namespace: kube-system
 25   resourceVersion: "221"
 26   selfLink: /api/v1/namespaces/kube-system/configmaps/coredns
 27   uid: b6e7d450-2e84-11ea-ae57-000c2939e87

删除之前的2个pod

[root@opcontroller ~]# kubectl delete pods coredns-576cbf47c7-v4hkl -n kube-system
pod "coredns-576cbf47c7-v4hkl" deleted

过一会k8s会自动拉起