在CentOS上成功部署Kubernetes(k8s)可以分为几个步骤,包括环境准备、安装Docker、配置网络、初始化Master节点以及加入Worker节点。以下是详细的步骤指南:
关闭防火墙:
systemctl stop firewalld && systemctl disable firewalld
关闭swap:
swapoff -a && sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
关闭SELinux:
setenforce 0 && sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config
设置时区:
timedatectl set-timezone Asia/Shanghai
时间同步:
yum -y install ntp
ntpdate time.windows.com
hwclock --systohc
配置网络:
编辑 /etc/sysctl.d/k8s.conf
文件:
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
使配置生效:
sysctl --system
添加镜像源:
curl https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -o /etc/yum.repos.d/docker-ce.repo
安装Docker:
yum list docker-ce --showduplicates | sort -r
yum install -y docker-ce-20.10.6-3.el7
systemctl start docker
systemctl enable docker
配置Docker镜像加速:
编辑 /etc/docker/daemon.json
文件:
cat << EOF
{
"registry-mirrors": ["https://wnsrsn9i.mirror.aliyuncs.com"]
}
EOF
systemctl restart docker
添加镜像源:
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
安装kubeadm、kubelet和kubectl:
yum list kubelet --showduplicates | sort -r
yum install -y kubelet-1.22.0 kubeadm-1.22.0 kubectl-1.22.0
systemctl enable kubelet
systemctl start kubelet
设置主机名:
hostnamectl set-hostname k8s-master
初始化Master节点:
kubeadm init --apiserver-advertise-address=192.168.0.159 --image-repository registry.aliyuncs.com/google_containers
配置kubectl:
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
加入Worker节点: 在Worker节点上执行:
kubeadm join 192.168.0.159:6443 --token <token> --discovery-token-ca-cert-hash sha256:<hash>
设置主机名:
hostnamectl set-hostname k8s-node1
hostnamectl set-hostname k8s-node2
配置hosts文件:
编辑 /etc/hosts
文件,添加Master节点和Worker节点的IP和主机名。
初始化Master节点:
kubeadm init --apiserver-advertise-address=192.168.0.51 --image-repository registry.aliyuncs.com/google_containers
配置kubectl:
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
加入Worker节点: 在Worker节点上执行:
kubeadm join 192.168.0.51:6443 --token <token> --discovery-token-ca-cert-hash sha256:<hash>
通过以上步骤,你可以在CentOS上成功部署一个Kubernetes集群。请根据你的实际需求和环境调整配置。