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