k8s高可用集群9集群的可用性驗證

1檢視集群中所有namespace裡的容器。發現都是running狀態

[root@k8s-master01 ~]#kubectl get pod --all-namespaces

2檢視監控資料

[root@k8s-master01 ~]#kubectl top pod -n kube-system

3檢查跨網是否可以訪問pod

[root@k8s-master01 ~]#kubectl get pod --all-namespaces -o wide

namespace              name                                         ready   status    restarts        age     ip               node           nominated node   readiness gates
kube-system            calico-kube-controllers-6f6595874c-s9gz4     1/1     running   0               3h28m   172.25.244.194   k8s-master01   kube-system            calico-node-b98mk                            1/1     running   0               3h28m   10.0.0.205       k8s-master02   [root@k8s-master01 ~]#ping 10.0.0.205
ping 
10.0.0.205 (10.0.0.205) 56(84
) bytes of data.
64 bytes from
10.0.0.205: icmp_seq=1 ttl=64 time=10.3
ms64 bytes from
10.0.0.205: icmp_seq=2 ttl=64 time=0.992
ms64 bytes from
10.0.0.205: icmp_seq=3 ttl=64 time=2.79
ms64 bytes from
10.0.0.205: icmp_seq=4 ttl=64 time=0.973
ms64 bytes from
10.0.0.205: icmp_seq=5 ttl=64 time=0.478 ms

4測試pod之間是不是通的

[root@k8s-master01 ~]#kubectl get pod --all-namespaces -o wide

namespace              name                                         ready   status    restarts        age     ip               node           nominated node   readiness gates
kube-system            calico-kube-controllers-6f6595874c-s9gz4     1/1     running   0               3h28m   172.25.244.194   k8s-master01   kube-system            calico-node-b98mk                            1/1     running   0               3h28m   10.0.0.202       k8s-master02   kube-system            calico-node-nhch2                            1/1     running   0               3h28m   10.0.0.205       k8s-node2      #在master01中進行node02的pod執行命令
[root@k8s-master01 ~]#kubectl exec -it calico-node-nhch2 -n kube-system /bin/sh
kubectl exec [pod] [command] 
is deprecated and will be removed in a future version. use kubectl exec [pod] --[command] instead.
defaulted container 
"calico-node
"out of: calico-node, upgrade-ipam (init), install-cni (init), flexvol-driver (init)
sh-4.4#

5要想外部訪問乙個應該，必須要暴漏乙個埠，例如

[root@k8s-master01 ~]#kubectl get svc -n kubernetes-dashboard

name                        type        cluster-ip        external-ip   port(s)         age
dashboard-metrics-scraper   clusterip   192.168.223.247
8000/tcp        96m
kubernetes-dashboardnodeport192.168.202.76
443:32081/tcp   96m
[root@k8s-master01 ~]#kubectl edit svc kubernetes-dashboard
error 
from server (notfound): services "
kubernetes-dashboard
"not found
[root@k8s-master01 ~]#kubectl edit svc kubernetes-dashboard -n !$

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