相关信息:
角色 | IP |
---|---|
k8s-master | 192.168.31.61 |
k8s-node1 | 192.168.31.62 |
k8s-node2 | 192.168.31.63 |
一、环境准备
1、关闭防火墙、关闭selinux、关闭swap
$ systemctl stop firewalld
$ systemctl disable firewalld
$ sed -i 's/enforcing/disabled/' /etc/selinux/config # 永久
$ setenforce 0 # 临时
$ swapoff -a # 临时
$ vim /etc/fstab # 永久
2、设置主机名、增加hosts
设置主机名: $ hostnamectl set-hostname <hostname> 在master添加hosts: $ cat >> /etc/hosts << EOF 192.168.31.61 k8s-master 192.168.31.62 k8s-node1 192.168.31.63 k8s-node2 EOF
3、将桥接的IPv4流量传递到iptables的链
$ cat > /etc/sysctl.d/k8s.conf << EOF net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 EOF $ sysctl --system # 生效
4、时间同步
时间同步: $ yum install ntpdate -y $ ntpdate time.windows.com
二、所有节点安装Docker/kubeadm/kubelet
1.1 安装docker
$ wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo $ yum -y install docker-ce-18.06.1.ce-3.el7 $ systemctl enable docker && systemctl start docker $ docker --version Docker version 18.06.1-ce, build e68fc7a
# cat > /etc/docker/daemon.json << EOF
{
"registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
}
EOF
1.2 添加阿里云的yum源
$ cat > /etc/yum.repos.d/kubernetes.repo << EOF [kubernetes] name=Kubernetes baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=0 repo_gpgcheck=0 gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg EOF
1.3 安装kubeadm,kubelet和kubectl
$ yum install -y kubelet-1.18.0 kubeadm-1.18.0 kubectl-1.18.0 $ systemctl enable kubelet
三、 部署master,node节点接入
1、部署master
在192.168.31.61(Master)执行。
$ kubeadm init \ --apiserver-advertise-address=192.168.31.61 \ --image-repository registry.aliyuncs.com/google_containers \ --kubernetes-version v1.18.0 \ --service-cidr=10.96.0.0/12 \ --pod-network-cidr=10.244.0.0/16
由于默认拉取镜像地址k8s.gcr.io国内无法访问,这里指定阿里云镜像仓库地址。
使用kubectl工具:
mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config $ kubectl get nodes
2、node节点接入
在192.168.31.62/63(Node)执行。
向集群添加新节点,执行在kubeadm init输出的kubeadm join命令:
$ kubeadm join 192.168.31.61:6443 --token esce21.q6hetwm8si29qxwn \ --discovery-token-ca-cert-hash sha256:00603a05805807501d7181c3d60b478788408cfe6cedefedb1f97569708be9c5
默认token有效期为24小时,当过期之后,该token就不可用了。这时就需要重新创建token,操作如下:
# kubeadm token create # kubeadm token list # openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | openssl dgst -sha256 -hex | sed 's/^.* //' 63bca849e0e01691ae14eab449570284f0c3ddeea590f8da988c07fe2729e924 # kubeadm join 192.168.31.61:6443 --token nuja6n.o3jrhsffiqs9swnu --discovery-token-ca-cert-hash sha256:63bca849e0e01691ae14eab449570284f0c3ddeea590f8da988c07fe2729e924