kubernetes 安装

kubernetes 安装

按照如下配置准备云主机

主机名IP地址最低配置master192.168.1.212CPU,2G内存node-0001192.168.1.312CPU,2G内存node-0002192.168.1.322CPU,2G内存node-0003192.168.1.332CPU,2G内存registry192.168.1.1001CPU,1G内存

kube-master安装

1、防火墙相关配置

参考前面知识点完成禁用 selinux，禁用 swap，卸载 firewalld-*

2、配置yum仓库

[root@ecs-proxy ~]# cp -a v1.17.6/k8s-install /var/ftp/localrepo/ [root@ecs-proxy ~]# cd /var/ftp/localrepo/ [root@ecs-proxy localrepo]# createrepo --update .

3、安装工具软件包

安装kubeadm、kubectl、kubelet、docker-ce

[root@master ~]# yum makecache [root@master ~]# yum install -y kubeadm kubelet kubectl docker-ce [root@master ~]# mkdir -p /etc/docker [root@master ~]# vim /etc/docker/daemon.json { "exec-opts": ["native.cgroupdriver=systemd"], "registry-mirrors": ["https://hub-mirror.c.163.com"], "insecure-registries":["192.168.1.100:5000", "registry:5000"] } [root@master ~]# systemctl enable --now docker kubelet [root@master ~]# docker info |grep Cgroup Cgroup Driver: systemd [root@master ~]# vim /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 net.ipv4.ip_forward = 1 [root@master ~]# modprobe br_netfilter [root@master ~]# sysctl --system

4、镜像导入私有仓库

# 把云盘 kubernetes/v1.17.6/base-images 中的镜像拷贝到 master [root@master ~]# cd base-image/ [root@master base-image]# for i in *.tar.gz;do docker load -i ${i};done [root@master base-image]# docker images [root@master base-image]# docker images |awk '$2!="TAG"{print $1,$2}'|while read _f _v;do docker tag ${_f}:${_v} 192.168.1.100:5000/${_f##*/}:${_v}; docker push 192.168.1.100:5000/${_f##*/}:${_v}; docker rmi ${_f}:${_v}; done # 查看验证 [root@master base-image]# curl http://192.168.1.100:5000/v2/_catalog

5、Tab键设置

[root@master ~]# kubectl completion bash >/etc/bash_completion.d/kubectl [root@master ~]# kubeadm completion bash >/etc/bash_completion.d/kubeadm [root@master ~]# exit

6、安装IPVS代理软件包

[root@master ~]# yum install -y ipvsadm ipset

7、系统初始化，排错

根据提示排错若干

[root@master ~]# vim /etc/hosts 192.168.1.21 master 192.168.1.31 node-0001 192.168.1.32 node-0002 192.168.1.33 node-0003 192.168.1.100 registry [root@master ~]# kubeadm init --dry-run

8、使用kubeadm部署

应答文件在云盘的 kubernetes/v1.17.6/config 目录下

[root@master ~]# mkdir init;cd init # 拷贝 kubeadm-init.yaml 到 master 云主机 init 目录下 [root@master init]# kubeadm init --config=kubeadm-init.yaml |tee master-init.log # 根据提示执行命令 [root@master init]# mkdir -p $HOME/.kube [root@master init]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config [root@master init]# sudo chown $(id -u):$(id -g) $HOME/.kube/config

9、验证安装结果

[root@master ~]# kubectl version [root@master ~]# kubectl get componentstatuses NAME STATUS MESSAGE ERROR controller-manager Healthy ok scheduler Healthy ok etcd-0 Healthy {"health":"true"}

计算节点安装

1、删除实验使用的容器

node-0001，node-0002 上执行

[root@node-0001 ~]# docker rm -f $(docker ps -aq) ----------------------------------------------------------------------------------------- [root@node-0002 ~]# docker rm -f $(docker ps -aq)

2、获取token

# 创建token [root@master ~]# kubeadm token create --ttl=0 --print-join-command [root@master ~]# kubeadm token list # 获取token_hash [root@master ~]# openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt |openssl rsa -pubin -outform der |openssl dgst -sha256 -hex

3、node安装

拷贝云盘上 kubernetes/v1.17.6/node-install 到跳板机

[root@ecs-proxy ~]# cd node-install/ [root@ecs-proxy node-install]# vim files/hosts ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 192.168.1.21 master 192.168.1.31 node-0001 192.168.1.32 node-0002 192.168.1.33 node-0003 192.168.1.100 registry [root@ecs-proxy node-install]# vim node_install.yaml ... ... vars: master: '192.168.1.21:6443' token: 'fm6kui.mp8rr3akn74a3nyn' token_hash: 'sha256:f46dd7ee29faa3c096cad189b0f9aedf59421d8a881f7623a543065fa6b0088c' ... ... [root@ecs-proxy node-install]# ansible-playbook node_install.yaml

4、验证安装

[root@master ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION master NotReady master 130m v1.17.6 node-0001 NotReady <none> 2m14s v1.17.6 node-0002 NotReady <none> 2m15s v1.17.6 node-0003 NotReady <none> 2m9s v1.17.6

网络插件安装配置

拷贝云盘 kubernetes/v1.17.6/flannel 目录到 master 上

1、上传镜像到私有仓库

[root@master ~]# cd flannel [root@master flannel]# docker load -i flannel.tar.gz [root@master flannel]# docker tag quay.io/coreos/flannel:v0.12.0-amd64 192.168.1.100:5000/flannel:v0.12.0-amd64 [root@master flannel]# docker push 192.168.1.100:5000/flannel:v0.12.0-amd64

2、修改配置文件并安装

[root@master flannel]# vim kube-flannel.yml 128: "Network": "10.244.0.0/16", 172: image: 192.168.1.100:5000/flannel:v0.12.0-amd64 186: image: 192.168.1.100:5000/flannel:v0.12.0-amd64 227-结尾: 删除 [root@master flannel]# kubectl apply -f kube-flannel.yml

3、验证结果

[root@master flannel]# kubectl get nodes NAME STATUS ROLES AGE VERSION master Ready master 26h v1.17.6 node-0001 Ready <none> 151m v1.17.6 node-0002 Ready <none> 152m v1.17.6 node-0003 Ready <none> 153m v1.17.6