k8s-kubeadm1.7安装

参考文章

• https://yq.aliyun.com/articles/702158
• https://juejin.im/post/5e550b3ff265da57570476db

mac 重新安装了虚拟机 需要更新 know_host 文件

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ssh-keygen -R 172.16.182.130
ssh-keygen -R 172.16.182.131
ssh-keygen -R 172.16.182.132
ssh-keygen -R 172.16.182.139
ssh-keygen -R 172.16.182.140

• 时间同步 : yum install -y ntpdate ntpdate ntp.api.bz

安装1.7 kube版本

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yum install -y kubeadm-1.17.3-0 kubelet-1.17.3-0 kubectl-1.17.3-0

下载 flannel 文件

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wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

下载 flannel v12.0版本的镜像

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打上标签:
docker tag quay.io/coreos/flannel:v0.12.0-arm64 registry.cn-shenzhen.aliyuncs.com/stool/flannel:v12.0

推送镜像:
docker push registry.cn-shenzhen.aliyuncs.com/stool/flannel:v12.0

拉取镜像:
docker pull registry.cn-shenzhen.aliyuncs.com/stool/flannel:v12.0 


docker tag registry.cn-shenzhen.aliyuncs.com/stool/flannel:v12.0  quay.io/coreos/flannel:v0.12.0-arm64

安装准备好一些主机的功能,进行关闭主机然后再克隆

• 添加主机名与IP对应关系（记得设置主机名）：

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$ cat /etc/hosts
172.16.182.130 k8s-master
172.16.182.139 k8s-node1
172.16.182.140 k8s-node2

• 最新文件

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  scp ~/Desktop/1.7flannel.yml root@172.16.182.130:/root/kube-flannel.yml > kubectl apply -f ./kube-flannel.yml

• 设置 hostname

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  hostnamectl set-hostname k8s-master hostnamectl set-hostname k8s-node1 hostnamectl set-hostname k8s-node2 hostnamectl set-hostname c-k8s-master hostnamectl set-hostname c-k8s-node1 hostnamectl set-hostname c-k8s-node2 hostnamectl set-hostname c-k8s-node3 hostnamectl set-hostname c-k8s-node3

执行的操作 ： 1 master 2 node

• init master 节点

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  kubeadm init \ --apiserver-advertise-address=172.16.182.130 \ --image-repository registry.aliyuncs.com/google_containers \ --kubernetes-version v1.17.3 \ --service-cidr=10.1.0.0/16 \ --pod-network-cidr=10.244.0.0/16 > systemctl enable kubelet result ： To start using your cluster, you need to run the following as a regular user: mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config You should now deploy a pod network to the cluster. Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at: https://kubernetes.io/docs/concepts/cluster-administration/addons/ Then you can join any number of worker nodes by running the following on each as root: kubeadm join 172.16.182.130:6443 --token 8ljs63.gnehsbfhvt8vbp4m \ --discovery-token-ca-cert-hash sha256:879064f5fe917a84788cfd5601ab29a666167f37881ea0084c707afc82164fc1

使用kubectl工具

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> mkdir -p $HOME/.kube

> sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

> sudo chown $(id -u):$(id -g) $HOME/.kube/config


# 查看节点内容进行测试 kubectl 是否安装成功

> kubectl get nodes 

# 显示内容  成功安装

NAME                    STATUS     ROLES    AGE     VERSION
localhost.localdomain   NotReady   master   4m26s   v1.15.0



> 查看的 k8s的全部服务的运行的情况 : kubectl get pods --all-namespaces

[root@k8s-master ~]# kubectl get pods --all-namespaces
NAMESPACE     NAME                                 READY   STATUS    RESTARTS   AGE
kube-system   coredns-9d85f5447-492bj              0/1     Pending   0          3m23s
kube-system   coredns-9d85f5447-bwzpq              0/1     Pending   0          3m23s
kube-system   etcd-k8s-master                      1/1     Running   0          3m19s
kube-system   kube-apiserver-k8s-master            1/1     Running   0          3m19s
kube-system   kube-controller-manager-k8s-master   1/1     Running   0          3m19s
kube-system   kube-proxy-tfz8j                     1/1     Running   0          3m23s
kube-system   kube-scheduler-k8s-master            1/1     Running   0          3m19s

• 添加网络服务: flannel

• 参考文章 : https://yq.aliyun.com/articles/702158

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  docker pull quay.io/coreos/flannel:v0.12.0-arm64 kubectl apply -f ./kube-flannel.yml 来自一篇文章: 推荐等到 node1 状态 Ready 之后再安装 flannel 因为 flannel 中的有些镜像在 quay-mirror.qiniu.com，国内无法访问，故可以转到阿里云镜像中心获取，然后再将其重新打 tag 为 quay.io/coreos/flannel:v0.11.0-amd64 中的名称即可。 [root@master ~]# cat processFlannelImage.sh #!/bin/bash docker pull quay-mirror.qiniu.com/coreos/flannel:v0.11.0-amd64 docker tag quay-mirror.qiniu.com/coreos/flannel:v0.11.0-amd64 quay.io/coreos/flannel:v0.11.0-amd64 [root@master ~]# chmod +x processFlannelImage.sh [root@master ~]# ./processFlannelImage.sh

• 查看详情内容:

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  [root@k8s-master ~]# kubectl get pods --all-namespaces NAMESPACE NAME READY STATUS RESTARTS AGE kube-system coredns-9d85f5447-492bj 0/1 Pending 0 8m16s kube-system coredns-9d85f5447-bwzpq 0/1 Pending 0 8m16s kube-system etcd-k8s-master 1/1 Running 0 8m12s kube-system kube-apiserver-k8s-master 1/1 Running 0 8m12s kube-system kube-controller-manager-k8s-master 1/1 Running 0 8m12s kube-system kube-flannel-ds-amd64-qc7hw 0/1 Init:0/1 0 3m39s kube-system kube-flannel-ds-amd64-r6wsc 0/1 Init:0/1 0 4m21s kube-system kube-flannel-ds-amd64-s964n 0/1 Init:0/1 0 3m33s kube-system kube-proxy-587kh 1/1 Running 0 3m39s kube-system kube-proxy-pnhfw 1/1 Running 0 3m33s kube-system kube-proxy-tfz8j 1/1 Running 0 8m16s kube-system kube-scheduler-k8s-master 1/1 Running 0 8m12s 查看详情: kubectl describe pods kube-flannel-ds-amd64-qc7h -n kube-system 发现在 docker pull 镜像内容: docker pull quay.io/coreos/flannel:v0.12.0-amd64 mac 机器下载比较快: docker save -o ~/Desktop/k8s/flannel/f-image quay.io/coreos/flannel:v0.12.0-amd64 scp ~/Desktop/k8s/flannel/f-image root@172.16.182.139:/root/flannel scp ~/Desktop/k8s/flannel/f-image root@172.16.182.140:/root/flannel

终于成功的把网络flannel装到 服务上

• 进行简单的测试 nginx 部署到3个节点上的 k8s 发布:

• pod 文件内容 nginx-deployment.yaml

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  apiVersion: apps/v1 kind: Deployment metadata: name: nginx-deployment labels: app: nginx spec: replicas: 3 selector: matchLabels: app: nginx template: metadata: labels: app: nginx spec: containers: - name: nginx image: nginx:1.7.9 ports: - containerPort: 80

• 执行 pod 指令 : kubectl apply -f nginx-pod.yaml

• service 文件内容 nginx-service.yaml:

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  apiVersion: v1 kind: Service metadata: name: nginx-service labels: app: nginx spec: ports: - port: 88 targetPort: 80 selector: app: nginx type: NodePort

• 执行 service 指令 : kubectl create -f nginx-service.yaml 为了让主机访问 k8s 提供的nginx 服务，我们需要在 nginx-service.yaml 规范 spec 中指定 type 为 NodePort

• 为了让主机访问 k8s 提供的nginx 服务，我们需要在 nginx-service.yaml 规范 spec 中指定 type 为 NodePort

• 查看服务执行的情况:

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  > kubectl get pod,svc NAME READY STATUS RESTARTS AGE pod/nginx-deployment-54f57cf6bf-69b29 1/1 Running 0 2m29s pod/nginx-deployment-54f57cf6bf-ch6dg 1/1 Running 0 2m29s pod/nginx-deployment-54f57cf6bf-lzmkh 1/1 Running 0 2m29s NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/kubernetes ClusterIP 10.1.0.1 <none> 443/TCP 57m service/nginx-service NodePort 10.1.167.218 <none> 88:32342/TCP 18s + 查看服务的详情: ```text > kubectl get service/nginx-service service/nginx-service NodePort 10.1.167.218 <none> 88:32342/TCP 18s

• 根据信息,可以访问: MasterIP:NodePort –> 172.16.182.130:32342 正常的访问.

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  进入 node 节点下进行 docker logs -f <id> 打印日志信息 可以正常的负载均衡到3台的 nginx 的机器上

总结

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不需要配置 ssh, 有些文档中写需要配置，但是没必要
部署前一定要对部署的环境变量设置
配置信息尽量脚本化
master 初始化时的参数一定要指定正确并知道其含义
在初始化好 master 节点后，先不要部署网络相关的内容，先将 node 加入集群，并等到 node 的状态为 Ready 后再部署网络相关的组件