一、机器情况
| 主机 | ip | 配置 | 操作系统 |
| master | 192.168.0.160 | 2c4g50G | centos7.8 |
| node01 | 192.168.0.6 | 2c4g50G | centos7.8 |
| node02 | 192.168.0.167 | 2c4g50G | centos7.8 |
二、机器设置
以下步骤需要在每个节点上执行
1、设置主机名
在各自节点上设置各自得主机名
hostnamectl set-hostname master hostnamectl set-hostname node01 hostnamectl set-hostname node02
2、设置hosts
cat <<EOF >/etc/hosts 192.168.0.160 master 192.168.0.6 node01 192.168.0.167 node02 EOF
3、设置防火墙以及seliunx
关闭防火墙 systemctl stop firewalld 设置开机不启动 systemctl disable firewalld 关闭selinux vi /etc/selinux/config SELINUX=disabled 重启系统 reboot
4、关闭swap分区
vi /etc/fstab # # /etc/fstab # Created by anaconda on Mon Jan 21 19:19:41 2019 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/centos-root / xfs defaults 0 0 UUID=214b916c-ad23-4762-b916-65b53fce1920 /boot xfs defaults 0 0 #/dev/mapper/centos-swap swap swap defaults 0 0
5、创建/etc/sysctl.d/k8s.conf文件，添加如下内容
cat <<EOF >/etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 net.ipv4.ip_forward = 1 vm.swappiness=0 EOF #执行命令使修改生效 modprobe br_netfilter sysctl -p /etc/sysctl.d/k8s.conf
6、kube-proxy开启ipvs的前置条件
cat > /etc/sysconfig/modules/ipvs.modules <<EOF #!/bin/bash modprobe -- ip_vs modprobe -- ip_vs_rr modprobe -- ip_vs_wrr modprobe -- ip_vs_sh modprobe -- nf_conntrack_ipv4 EOF 加载模块 chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4 安装了ipset软件包 yum install ipset -y 安装管理工具ipvsadm yum install ipvsadm -y
三、安装docker
以下步骤需要在每个节点上执行
1、设置阿里云docker yum源
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo 如果yum-config-manager不能用，请安装yum-utils yum -y install yum-utils 查看可安装Docker版本 yum list docker-ce.x86_64 --showduplicates |sort -r
2、安装docker
yum默认是安装最新版本，但是为了兼容性，这里就指定版本安装
yum install -y --setopt=obsoletes=0 docker-ce-18.06.1.ce-3.el7
3、设置docker的Cgroup Driver
cat <<EOF >/etc/docker/daemon.json
{
"exec-opts": ["native.cgroupdriver=systemd"]
}
EOF
如果上面一行还有内容，记得在上面一行加上逗号
4、启动docker设置开机启动
systemctl start docker && systemctl enable docker
四、使用kubeadm安装kubernetes
1-4需在所有节点执行，5-6在master节点上执行
1、配置yum源
vi /etc/yum.repos.d/kubernetes.repo [kubernetes] name=Kubernetes baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/ gpgcheck=1 enable=1 repo_gpgcheck=1 gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
2、安装kubelet，kubeadm，kubectl
yum makecache fast && yum install -y kubelet kubeadm kubectl
3、修改kubelet的Cgroup Driver
cat <<EOF >/etc/sysconfig/kubelet KUBELET_CGROUP_ARGS="--cgroup-driver=systemd" KUBE_PROXY_MODE="ipvs" EOF
4、下载必要的镜像
[root@master ~]# kubeadm config images list k8s.gcr.io/kube-apiserver:v1.23.1 k8s.gcr.io/kube-controller-manager:v1.23.1 k8s.gcr.io/kube-scheduler:v1.23.1 k8s.gcr.io/kube-proxy:v1.23.1 k8s.gcr.io/pause:3.6 k8s.gcr.io/etcd:3.5.1-0 k8s.gcr.io/coredns/coredns:v1.8.6 ##注意这里多了一级coredns vi k8s.sh docker pull mirrorgooglecontainers/kube-apiserver:v1.23.1 docker pull mirrorgooglecontainers/kube-controller-manager:v1.23.1 docker pull mirrorgooglecontainers/kube-scheduler:v1.23.1 docker pull mirrorgooglecontainers/kube-proxy:v1.23.1 docker pull mirrorgooglecontainers/pause:3.6 docker pull mirrorgooglecontainers/etcd:3.5.1-0 docker pull coredns/coredns:v1.8.6 docker tag mirrorgooglecontainers/kube-apiserver:v1.12.1 k8s.gcr.io/kube-apiserver:v1.23.1 docker tag mirrorgooglecontainers/kube-controller-manager:v1.23.1 k8s.gcr.io/kube-controller-manager:v1.23.1 docker tag mirrorgooglecontainers/kube-scheduler:v1.12.1 k8s.gcr.io/kube-scheduler:v1.23.1 docker tag mirrorgooglecontainers/kube-proxy:v1.12.1 k8s.gcr.io/kube-proxy:v1.23.1 docker tag mirrorgooglecontainers/pause:3.1 k8s.gcr.io/pause:3.6 docker tag mirrorgooglecontainers/etcd:3.2.24 k8s.gcr.io/etcd:3.5.1-0 docker tag coredns/coredns:v1.8.6 k8s.gcr.io/coredns/coredns:v1.8.6 ##这里打tag的时候也要多一级coredns docker rmi mirrorgooglecontainers/kube-apiserver:v1.23.1 docker rmi mirrorgooglecontainers/kube-controller-manager:v1.23.1 docker rmi mirrorgooglecontainers/kube-scheduler:v1.23.1 docker rmi mirrorgooglecontainers/kube-proxy:v1.23.1 docker rmi mirrorgooglecontainers/pause:3.6 docker rmi mirrorgooglecontainers/etcd:3.5.1-0 docker rmi coredns/coredns:v1.8.6
5、初始化
kubeadm init \ --kubernetes-version=v1.23.1 \ --pod-network-cidr=10.244.0.0/16 \ --service-cidr=10.96.0.0/12 \ --apiserver-advertise-address=192.168.0.160
mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config
如果上面的参数填写错误，需要重新初始化需执行重置
kubeadm reset kubernetes-version：修改要安装的版本 apiserver-advertise-address：master节点的ip地址
当出现如下信息表示成功
Your Kubernetes control-plane has initialized successfully! 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 Alternatively, if you are the root user, you can run: export KUBECONFIG=/etc/kubernetes/admin.conf 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:
在nide01和node02节点上分别执行如下命令，加入集群 kubeadm join 192.168.0.160:6443 --token 57jle4.zbccddfk8d2su6pe \ --discovery-token-ca-cert-hash sha256:556eeec7a4d742155a785b90a6efaebd95c466ad939047d4ad90ccb55dc35418
6、Flannel部署
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml kubectl apply -f kube-flannel.yml
如需重新安装需要先删除所创建的网络配置
kubectl delete -f kube-flannel.yml
7、节点加入集群
在node01和node02节点上分别执行如下命令加入集群： kubeadm join 192.168.0.160:6443 --token 57jle4.zbccddfk8d2su6pe \ --discovery-token-ca-cert-hash sha256:556eeec7a4d742155a785b90a6efaebd95c466ad939047d4ad90ccb55dc35418
8、查看状态
master节点上执行，如果都为Ready表示成功 kubectl get node [root@master ~]# kubectl get node NAME STATUS ROLES AGE VERSION master Ready control-plane,master 27m v1.23.1 node01 Ready <none> 17m v1.23.1 node02 Ready <none> 17m v1.23.1
五、镜像地址
我已把相关镜像打包，放到云盘上了，有需要的自取
链接: https://pan.baidu.com/s/1XKN32WXiXmp6XKlsgw-xGw 提取码: q8hs