2.2 KiB
2.2 KiB
# 查看所在pod
[root@hy-node3 ~]# kubectl get pod -n kube-system
NAME READY STATUS RESTARTS AGE
calico-kube-controllers-7cc8dd57d9-jhvnj 1/1 Running 4 7d21h
calico-node-lm24q 1/1 Running 9 20d
calico-node-p2pn4 1/1 Running 5 20d
coredns-675db8b7cc-s6z7g 1/1 Running 1 7d21h
snapshot-controller-0 1/1 Running 0 7d6h
# 找到对应service,使用serviceip
[root@hy-node3 ~]# kubectl get svc -n kube-system
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kube-controller-manager-svc ClusterIP None <none> 10257/TCP 13d
kube-dns ClusterIP 10.96.0.2 <none> 53/UDP,53/TCP,9153/TCP 20d
kube-scheduler-svc ClusterIP None <none> 10259/TCP 13d
kubelet ClusterIP None <none> 10250/TCP,10255/TCP,4194/TCP 13d
# 找个ip查看dns是否能够解析
[root@hy-node3 ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 21d
nginx-service-nodeport NodePort 10.96.231.91 <none> 80:30001/TCP 20d
# 解析测试
dig -t a www.baidu.com @10.96.0.2
[root@hy-node3 ~]# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.1.120
nameserver 223.6.6.6
nameserver 223.5.5.5
# 编辑coredns配置文件
kubectl edit configmap coredns -n kube-system
# 查看是否可以滚动升级
[root@hy-node3 ~]# kubectl get deployment.apps -n kube-system
NAME READY UP-TO-DATE AVAILABLE AGE
calico-kube-controllers 1/1 1 1 20d
coredns 1/1 1 1 20d
[root@hy-node3 ~]# kubectl rollout restart deployment coredns -n kube-system
deployment.apps/coredns restarted