通过这几篇文章，相信我们已经通过kubernetes-the-hard-way的方式，将k8s集群搭建成功了，那么如何进行验证呢？无非就是新建一个daemonset嘛，然后通过检测各种网络连通性验证，那么话不多说，直接来实操吧。
新建nginx的yaml文件
# 建立配置文件[root@node1 ~]# cat > nginx-ds.yml <<EOFapiVersion: v1kind: Servicemetadata:name: nginx-dslabels:app: nginx-dsspec:type: NodePortselector:app: nginx-dsports:- name: httpport: 80targetPort: 80---apiVersion: apps/v1kind: DaemonSetmetadata:name: nginx-dsspec:selector:matchLabels:app: nginx-dstemplate:metadata:labels:app: nginx-dsspec:containers:- name: my-nginximage: nginx:1.19ports:- containerPort: 80EOF[root@node1 ~]## 生成daemonset[root@node1 ~]# kubectl apply -f nginx-ds.yml# 检查生成情况# 由于没有指定namespace，所以默认在default的命名空间中[root@node1 ~]# kubectl get podNAME READY STATUS RESTARTS AGEnginx-ds-m8wrf 1/1 Running 0 22snginx-ds-zc5qt 1/1 Running 0 22s[root@node1 ~]#
检查IP地址连通
# 获取到pod的IP地址[root@node1 ~]# kubectl get pod -o wideNAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATESnginx-ds-m8wrf 1/1 Running 0 2m31s 10.200.135.3 node3 <none> <none>nginx-ds-zc5qt 1/1 Running 0 2m31s 10.200.104.2 node2 <none> <none>[root@node1 ~]## 分别在node2和node3这两个worker节点上ping一下[root@node2 ~]# ping 10.200.135.3[root@node2 ~]# ping 10.200.104.2[root@node3 ~]# ping 10.200.135.3[root@node3 ~]# ping 10.200.104.2# 检查svc的可达性[root@node1 ~]# kubectl get svcNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGEkubernetes ClusterIP 10.233.0.1 <none> 443/TCP 22hnginx-ds NodePort 10.233.127.233 <none> 80:30323/TCP 4m12s[root@node1 ~]## 获取到IP为10.233.127.233# 然后在worker节点上分别curl一下，看看是否成功返回nginx界面。[root@node2 ~]# curl 10.233.127.233<!DOCTYPE html><html><head><title>Welcome to nginx!</title><style>html { color-scheme: light dark; }body { width: 35em; margin: 0 auto;font-family: Tahoma, Verdana, Arial, sans-serif; }</style></head><body><h1>Welcome to nginx!</h1><p>If you see this page, the nginx web server is successfully installed andworking. Further configuration is required.</p><p>For online documentation and support please refer to<a href="http://nginx.org/">nginx.org</a>.<br/>Commercial support is available at<a href="http://nginx.com/">nginx.com</a>.</p><p><em>Thank you for using nginx.</em></p></body></html>[root@node2 ~]## 再检查通过node的IP地址是否能通，使用如下命令，在worker节点上执行[root@node2 ~]# curl 10.200.135.3:80[root@node2 ~]# curl 10.200.104.2:80
检查dns
# 创建一个nginx的pod[root@node1 ~]# cat > pod-nginx.yaml <<EOFapiVersion: v1kind: Podmetadata:name: nginxspec:containers:- name: nginximage: docker.io/library/nginx:1.19ports:- containerPort: 80EOF[root@node1 ~]## 使配置生效[root@node1 ~]# kubectl apply -f pod-nginx.yamlpod/nginx created[root@node1 ~]## 查看现在的pod[root@node1 ~]# kubectl get podNAME READY STATUS RESTARTS AGEnginx 1/1 Running 0 51snginx-ds-m8wrf 1/1 Running 0 9m11snginx-ds-zc5qt 1/1 Running 0 9m11s[root@node1 ~]## 进入pod[root@node1 ~]# kubectl exec nginx -it -- /bin/bash# 查看DNSroot@nginx:/# cat /etc/resolv.confsearch default.svc.cluster.local svc.cluster.local cluster.local localdomainnameserver 169.254.25.10options ndots:5root@nginx:/## 检查名字是否可以正常解析root@nginx:/# curl nginx-ds # 经过检测是可以的
日志功能
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