前言
Kubernetes是用于自动部署、扩展和管理“容器化应用程序”的开源系统。该系统由Google设计并捐赠给Cloud Native Computing Foundation来使用。 它旨在提供“跨主机集群的自动部署、扩展以及运行应用程序容器的平台”。 它支持一系列容器工具，包括Docker等。
必须条件
不少于2台的拥有公网ip的云服务器(强烈建议使用海外服务器)，服务器最低配置：CPU2核心，内存2G，硬盘20G
系统为CentOS 7.9
部署Master节点
设置Master节点主机名
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| hostnamectl set-hostname k8s-master
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修改Master节点hosts文件
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| vim /etc/hosts
192.168.1.10 k8s-master
192.168.1.11 k8s-node1
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关闭Master节点selinux
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| setenforce 0
sed -i --follow-symlinks 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux
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关闭防火墙
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| systemctl stop firewalld
systemctl disable firewalld
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关闭swap
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| swapoff /dev/mapper/centos-swap
rm /dev/mapper/centos-swap
/dev/mapper/centos-swap swap swap default 0 0
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在Master节点添加安装源
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cat <<EOF > kubernetes.repo
[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
mv kubernetes.repo /etc/yum.repos.d/
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum -y install yum-utils
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在Master节点安装k8s和docker组件
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yum install -y kubelet-1.22.4 kubectl-1.22.4 kubeadm-1.22.4 docker-ce.20.10.11-3.e17
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启动Master节点的kubelet和docker服务
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| systemctl enable docker
systemctl enable kubelet
systemctl start docker
systemctl start kubelet
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修改Master节点 daemon.json 配置
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| cat <<EOF > daemon.json
{
"exec-opts": ["native.cgroupdriver=systemd"],
"registry-mirrors": ["https://rdy406dj.mirror.aliyuncs.com"]
}
EOF
mv daemon.json /etc/docker/
systemctl daemon-reload
systemctl restart docker
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初始化k8s集群
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| kubeadm init --image-repository=registry.aliyuncs.com/google_containers
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config
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在Master节点安装flannel网络插件
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| kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
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部署Worker节点
设置Worker节点主机名
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| hostnamectl set-hostname k8s-node1
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修改Worker节点hosts文件
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| vim /etc/hosts
192.168.1.10 k8s-master
192.168.1.11 k8s-node1
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关闭Worker节点selinux
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| setenforce 0
sed -i --follow-symlinks 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux
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关闭防火墙
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| systemctl stop firewalld
systemctl disable firewalld
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关闭swap
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| swapoff /dev/mapper/centos-swap
rm /dev/mapper/centos-swap
/dev/mapper/centos-swap swap swap default 0 0
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在Worker节点添加安装源
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cat <<EOF > kubernetes.repo
[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
mv kubernetes.repo /etc/yum.repos.d/
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum -y install yum-utils
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在Worker节点安装k8s和docker组件
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yum install -y kubelet-1.22.4 kubectl-1.22.4 kubeadm-1.22.4 docker-ce.20.10.11-3.e17
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启动Worker节点的kubelet和docker服务
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| systemctl enable docker
systemctl enable kubelet
systemctl start docker
systemctl start kubelet
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修改Worker节点 daemon.json 配置
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| cat <<EOF > daemon.json
{
"exec-opts": ["native.cgroupdriver=systemd"],
"registry-mirrors": ["https://rdy406dj.mirror.aliyuncs.com"]
}
EOF
mv daemon.json /etc/docker/
systemctl daemon-reload
systemctl restart docker
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将Worker节点加入k8s集群
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| kubeadm join 192.168.1.10:6443 --token xxx --discovery-token-ca-cert-hash xxx
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初步使用
查看所有节点
