|NO.Z.00065|——————————|^^ 部署 ^^|——|KuberNetes&二进制部署.V18|3台Server|——|kubernetes验证|Pod与Pod之间通信|
一、集群验证：pod和pod之间通信
### --- pod验证流程：Pod和Pod之间可以正常通信
~~~ 同namespace能通信
~~~ 跨namespace能通信
~~~ 跨机器能通信二、查看kube-system命名空间下部署了那些资源
### --- 查看kube-system命名空间下部署了那些资源
[root@k8s-master01 ~]# kubectl get po -n kube-system -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
calico-kube-controllers-5f6d4b864b-6clrl 1/1 Running 0 69m 192.168.1.11 k8s-master01 <none> <none>
calico-node-6hbtl 1/1 Running 0 69m 192.168.1.13 k8s-master03 <none> <none>
calico-node-77c2f 1/1 Running 3 69m 192.168.1.11 k8s-master01 <none> <none>
calico-node-hrqpt 1/1 Running 0 69m 192.168.1.15 k8s-node02 <none> <none>
calico-node-trkhw 1/1 Running 0 69m 192.168.1.12 k8s-master02 <none> <none>
calico-node-z4gkj 1/1 Running 0 69m 192.168.1.14 k8s-node01 <none> <none>
coredns-867d46bfc6-sk5dp 1/1 Running 0 48m 172.25.92.65 k8s-master02 <none> <none>
metrics-server-595f65d8d5-slhtd 1/1 Running 0 45m 172.18.195.1 k8s-master03 <none> <none>三、验证pod和pod之间是否通信
### --- 进入k8s-node01宿主机下calico-node-z4gkj容器内部
[root@k8s-master01 ~]# kubectl exec -ti calico-node-z4gkj -n kube-system -- bash### --- 验证pod与pod之间通讯：
~~~ 注：node01容器内部ping.node02是否可以ping通
[root@k8s-node01 /]# ping 192.168.1.15
PING 192.168.1.15 (192.168.1.15) 56(84) bytes of data.
64 bytes from 192.168.1.15: icmp_seq=1 ttl=64 time=1.46 ms
64 bytes from 192.168.1.15: icmp_seq=2 ttl=64 time=0.414 ms四、验证pod和pod之间是否通信
### --- 进入到busybox容器内部
[root@k8s-master01 ~]# kubectl exec -ti busybox -- sh### --- ping.k8s-master01宿主机地址
~~~ 注：ping.master01是否可以ping通
/ # ping 192.168.1.11
PING 192.168.1.11 (192.168.1.11): 56 data bytes
64 bytes from 192.168.1.11: seq=0 ttl=64 time=0.118 ms
64 bytes from 192.168.1.11: seq=1 ttl=64 time=0.124 ms### --- ping.k8s-node宿主机地址
~~~ 注：ping node02是否可以ping通
/ # ping 192.168.1.15
PING 192.168.1.15 (192.168.1.15): 56 data bytes
64 bytes from 192.168.1.15: seq=0 ttl=63 time=3.252 ms
64 bytes from 192.168.1.15: seq=1 ttl=63 time=2.189 ms五、验证pod在不同namespace下通信
### --- 启动一个deployment启动3个副本的deployment
[root@k8s-master01 ~]# kubectl create deploy nginx --image=nginx --replicas=3
deployment.apps/nginx created### --- 查看创建的deployment
[root@k8s-master01 ~]# kubectl get deploy
NAME READY UP-TO-DATE AVAILABLE AGE
nginx 0/3 3 0 6s### --- 查看deployment的pod部署在哪3个节点
[root@k8s-master01 ~]# kubectl get po -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
busybox 1/1 Running 0 31m 172.25.244.193 k8s-master01 <none> <none>
nginx-6799fc88d8-gtthn 0/1 ImagePullBackOff 0 62s 172.18.195.3 k8s-master03 <none> <none>
nginx-6799fc88d8-jkwz9 0/1 ContainerCreating 0 62s <none> k8s-master02 <none> <none>
nginx-6799fc88d8-t5k9n 0/1 ContainerCreating 0 62s <none> k8s-master01 <none> <none>### --- 删除创建的验证资源
[root@k8s-master01 ~]# kubectl delete deploy nginx
deployment.apps "nginx" deleted
[root@k8s-master01 ~]# kubectl delete po busybox
pod "busybox" deletedWalter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart
——W.S.Landor
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