一、环境准备及测试
1、报错处理：
kube-system calico-node-5wvln 0/1 Init:0/3 0 16h kube-system calico-node-d7xfb 0/1 Init:0/3 0 16h kube-system calico-node-k84tc 0/1 Init:0/3 0 16h执行以下命令：更新内核版本
yum list kernel
yum update kernel
reboot
如果是cni报错，需要上传下面两个文件，然后重启
一直不成功挂起状态
再/etc/cni/net.d/中上传文件
kube-system calico-node-5wvln 0/1 Init:0/3 0 16h kube-system calico-node-d7xfb 0/1 Init:0/3 0 16h kube-system calico-node-k84tc 1/1 Running 0 16h [root@k8s-master ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION k8s-master Ready control-plane 16h v1.28.2 k8s-node1 Ready <none> 16h v1.28.2 k8s-node2 Ready <none> 16h v1.28.2现在就合适了
kubectl 无法补全报错ku-bash: _get_comp_words_by_ref: command not found
root@k8s-master \~\]# yum -y install bash-completion \[root@k8s-master \~\]# bash /usr/share/bash-completion/bash_completion \[root@k8s-master \~\]# bash
2、测试：
创建nginx镜像名称为nginx0
root@k8s-master \~\]# kubectl run nginx0 --image=nginx:latest pod/nginx0 created \[root@k8s-master \~\]# kubectl get po -Aowide default nginx0 0/1 ContainerCreating 0 29s
k8s-node2 **查看日志** \[root@k8s-master \~\]# kubectl logs nginx0 Error from server (BadRequest): container "nginx0" in pod "nginx0" is waiting to start: ContainerCreating \[root@k8s-master \~\]# kubectl run nginx --image=nginx **不指定版本** \[root@k8s-master \~\]# kubectl delete pod nginx **删除pod** [root@k8s-master ~]# kubectl get po -Aowide|grep nginx default nginx 0/1 ContainerCreating 0 5s k8s-node2 default nginx0 0/1 ContainerCreating 0 6m59s k8s-node2
（1）复制密钥文件到node1和node2
root@k8s-master \~\]# scp /etc/kubernetes/pki/front-proxy-ca.crt k8s-node1:/etc/kubernetes/pki/front-proxy-ca.crt \[root@k8s-master \~\]# scp /etc/kubernetes/pki/front-proxy-ca.crt k8s-node2:/etc/kubernetes/pki/front-proxy-ca.crt
（2）上传文件
将components.yaml文件上传到家目录
root@k8s-master \~\]# mkdir pods \[root@k8s-master \~\]# mv components.yaml pods/
（3）根据yaml文件创建pod
root@k8s-master pods\]# kubectl create -f components.yaml \[root@k8s-master pods\]# kubectl top nodes
（4）查看pod列表状态
root@k8s-master pods\]# kubectl get pods -Aowide\|grep metrics kube-system metrics-server-79776b6d54-xfv8d 1/1 Running 0 5m58s 172.16.169.129 k8s-node2
（5）查看节点资源监控
root@k8s-master pods\]# kubectl top nodes **查看节点** NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% k8s-master 80m 4% 1087Mi 63% k8s-node1 34m 1% 859Mi 49% k8s-node2 32m 1% 825Mi 48% \[root@k8s-master pods\]# kubectl top pods -n kube-system **查看kube-system命名空间的所有节点** NAME CPU(cores) MEMORY(bytes) calico-kube-controllers-6d48795585-pfwrj 2m 13Mi calico-node-5wvln 15m 93Mi calico-node-d7xfb 15m 90Mi calico-node-k84tc 16m 94Mi coredns-6554b8b87f-bbnh7 1m 11Mi coredns-6554b8b87f-z9rvq 1m 12Mi etcd-k8s-master 10m 79Mi kube-apiserver-k8s-master 24m 313Mi kube-controller-manager-k8s-master 7m 87Mi kube-proxy-644jq 1m 27Mi kube-proxy-65xl7 1m 25Mi kube-proxy-7thhh 1m 35Mi kube-scheduler-k8s-master 2m 49Mi metrics-server-79776b6d54-xfv8d 2m 17Mi
4、Dashboard部署
root@k8s-master \~\]# cd k8s-ha-install/ \[root@k8s-master k8s-ha-install\]# ls  \[root@k8s-master k8s-ha-install\]# cd dashboard/ \[root@k8s-master dashboard\]# ls dashboard-user.yaml dashboard.yaml \[root@k8s-master dashboard\]# kubectl create -f . .表示用当前目录 \[root@k8s-master dashboard\]# kubectl get po -A\|grep dashboard [root@k8s-master dashboard]# kubectl get po -A|grep dashboard kubernetes-dashboard dashboard-metrics-scraper-7b554c884f-xnch2 1/1 Running 0 10m kubernetes-dashboard kubernetes-dashboard-54b699784c-z7444 1/1 Running 0 10m
5、更改svc模式
root@k8s-master dashboard\]# kubectl edit svc kubernetes-dashboard -n kubernetes-dashboard  \[root@k8s-master dashboard\]# kubectl get svc kubernetes-dashboard -n kubernetes-dashboard NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes-dashboard NodePort 10.96.160.87
443:30965/TCP 8m42s 
6、创建登录token
root@k8s-master dashboard\]# kubectl create token admin-user -n kube-system eyJhbGciOiJSUzI1NiIsImtpZCI6IkpfZklrNGlnY0JGWTB2Zmdxbm40N0JtMkdnQWR6RkphZ25KVEdUTnkxNWMifQ.eyJhdWQiOlsiaHR0cHM6Ly9rdWJlcm5ldGVzLmRlZmF1bHQuc3ZjLmNsdXN0ZXIubG9jYWwiXSwiZXhwIjoxNzI2MTE1NTQ2LCJpYXQiOjE3MjYxMTE5NDYsImlzcyI6Imh0dHBzOi8va3ViZXJuZXRlcy5kZWZhdWx0LnN2Yy5jbHVzdGVyLmxvY2FsIiwia3ViZXJuZXRlcy5pbyI6eyJuYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsInNlcnZpY2VhY2NvdW50Ijp7Im5hbWUiOiJhZG1pbi11c2VyIiwidWlkIjoiYTVlNDQ3OWYtNzFiOS00YWQyLTkxMTYtOWI5NTNlYmE3ODk1In19LCJuYmYiOjE3MjYxMTE5NDYsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlLXN5c3RlbTphZG1pbi11c2VyIn0.Xo98HIHqp_jSUhbkjyGDeCM0rzeleSi7HXDW-FRTS8DcqeY2Azgwxjjm_nEA9koxrJRtkr2F5Cv2IYTQYHVrsEbtnHk8aG_KXICeLdcKVcYEIzI7MMrKatinfLHwgrIvFM6xNgPEZleA7X0g49FRlZ7ZCHGLghIWpzyHn78ZDxuXWfsE-yaTxvVc4AbrsUR2c1xMGskXXIjmCj8yZ3HkUbDsuLhOFBinMi_BgWXTHh63wiveKpHmfClsKwhBb7Q3QjFqzdYr9veTxgbUbA95-eKZ4XLYZim1TEpvFgi4zDhkW8OFzaFfGlhxvP7DTmax7qp-46mRq_VBdDUiCdoQdw
7、更新 Kube-Proxy 的 Pod
root@k8s-master \~\]# kubectl edit cm kube-proxy -n kube-system configmap/kube-proxy edited  \[root@k8s-master \~\]# kubectl patch daemonset kube-proxy -p "{\\"spec\\":{\\"template\\":{\\"metadata\\":{\\"annotations\\":{\\"date\\":\\"\`date +'%s'\`\\"}}}}}" -n kube-system \[root@k8s-master \~\]# curl 127.0.0.1:10249/proxyMode ipvs **查看service pod 宿主机的网段** \[root@k8s-master \~\]# kubectl get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.96.0.1
443/TCP 21h
8、验证是否可正常创建参数
root@k8s-master \~\]# kubectl create deploy cluster-test1 --image=registry.cn-beijing.aliyuncs.com/dotbalo/debug-tools -- sleep 3600 \[root@k8s-master \~\]# kubectl get po cluster-test1-54575cf56c-9xwb5 1/1 Running 0 3m34s \[root@k8s-master \~\]# kubectl get po -owide cluster-test1-54575cf56c-9xwb5 1/1 Running 0 10m 172.16.36.72 k8s-node1
9、Pod 必须能够解析 Service
（1）nslookup kubernetes
root@k8s-master \~\]# kubectl exec -it cluster-test1-54575cf56c-9xwb5 -- bash (07:39 cluster-test1-54575cf56c-9xwb5:/) nslookup kubernetes Server: 10.96.0.10 Address: 10.96.0.10#53 Name: kubernetes.default.svc.cluster.local Address: 10.96.0.1
（2）nslookup kube-dns.kube-system
(07:39 cluster-test1-54575cf56c-9xwb5:/) nslookup kube-dns.kube-system Server: 10.96.0.10 Address: 10.96.0.10#53 Name: kube-dns.kube-system.svc.cluster.local Address: 10.96.0.10 [root@k8s-master ~]# ping 172.16.36.72 -c 3 PING 172.16.36.72 (172.16.36.72) 56(84) bytes of data. 64 bytes from 172.16.36.72: icmp_seq=1 ttl=63 time=0.435 ms 64 bytes from 172.16.36.72: icmp_seq=2 ttl=63 time=0.295 ms 64 bytes from 172.16.36.72: icmp_seq=3 ttl=63 time=0.357 ms --- 172.16.36.72 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2000ms rtt min/avg/max/mdev = 0.295/0.362/0.435/0.059 ms
二、常用指令
1、Kubernetes 自动补齐
root@k8s-master \~\]# yum -y install bash-completion \[root@k8s-master \~\]# source \<(kubectl completion bash) 临时开启自动补齐功能 \[root@k8s-master \~\]# echo "source \<(kubectl completion bash)" \>\> \~/.bashrc 永久开启自动补齐功能
2、常用命令
创建
root@k8s-master \~\]# kubectl create namespace pes \[root@k8s-master \~\]# kubectl get namespace **删除** \[root@k8s-master \~\]# kubectl delete deployment clustertest \[root@k8s-master \~\]# kubectl delete deployment cluster-test
3、编写yaml文件
root@k8s-master \~\]# vim pods/abc.yaml ```javascript apiVersion: v1 kind: Pod metadata: name: busybox-sleep spec: containers: - name: busybox image: busybox:1.28 args: - sleep - "1000" ``` ##### 4、创建 > \[root@k8s-master pods\]# kubectl create -f abc.yaml > > \[root@k8s-master pods\]# kubectl get po -A\|grep bus > \[root@k8s-master pods\]# kubectl delete pod busybox-sleep >