安装步骤
- 选择4核8G（master）、8核16G（node1）、8核16G（node2） 三台机器，按量付费进行实验，CentOS7.9
- 安装Docker
- 安装Kubernetes
- 安装KubeSphere前置环境
- 安装KubeSphere
1、安装Docker
sudo yum remove docker*
sudo yum install -y yum-utils
#配置docker的yum地址
sudo yum-config-manager \
--add-repo \
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
#安装指定版本
sudo yum install -y docker-ce-20.10.7 docker-ce-cli-20.10.7 containerd.io-1.4.6
# 启动&开机启动docker
systemctl enable docker --now
# docker加速配置
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://82m9ar63.mirror.aliyuncs.com"],
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
},
"storage-driver": "overlay2"
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
2、安装Kubernetes
2.1、基本环境
每个机器使用内网ip互通
每个机器配置自己的hostname，不能用localhost
#设置每个机器自己的hostname
hostnamectl set-hostname xxx
# 将 SELinux 设置为 permissive 模式（相当于将其禁用）
sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
#关闭swap
swapoff -a
sed -ri 's/.*swap.*/#&/' /etc/fstab
#允许 iptables 检查桥接流量
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sudo sysctl --system
2.2、安装kubelet、kubeadm、kubectl
ip地址修改为master的
#配置k8s的yum源地址
cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
#安装 kubelet，kubeadm，kubectl
sudo yum install -y kubelet-1.20.9 kubeadm-1.20.9 kubectl-1.20.9
#启动kubelet
sudo systemctl enable --now kubelet
#所有机器配置master域名
echo "192.168.68.210 kubesphere-master" >> /etc/hosts
2.3、初始化master节点
可以参考 https://www.cnblogs.com/hg-super-man/p/16898730.html
2.3.1、在master节点初始化
ip修改为自己master节点的ip
kubeadm init \
--apiserver-advertise-address=192.168.68.210 \
--control-plane-endpoint=kubesphere-master \
--image-repository registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images \
--kubernetes-version v1.20.9 \
--service-cidr=10.96.0.0/16 \
--pod-network-cidr=192.168.0.0/16
如果安装失败
重置
kubeadm reset --force
查看状态
systemctl status kubelet
2.3.2、记录关键信息
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/
You can now join any number of control-plane nodes by copying certificate authorities
and service account keys on each node and then running the following as root:
kubeadm join kubesphere-master:6443 --token ztrn7a.k7r257hs7fs3j780 \
--discovery-token-ca-cert-hash sha256:5e0b0f7af93d0ffb0c8bb424d8a8c3aa305b578c439458eef081aba96ef0a026 \
--control-plane
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join kubesphere-master:6443 --token ztrn7a.k7r257hs7fs3j780 \
--discovery-token-ca-cert-hash sha256:5e0b0f7af93d0ffb0c8bb424d8a8c3aa305b578c439458eef081aba96ef0a026
2.3.3、创建文件夹
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
2.3.4、安装Calico网络插件
curl https://docs.projectcalico.org/archive/v3.21/manifests/calico.yaml -O
kubectl apply -f calico.yaml
2.3.5、加入worker节点
分别在node节点执行
kubeadm join kubesphere-master:6443 --token ztrn7a.k7r257hs7fs3j780 \
--discovery-token-ca-cert-hash sha256:5e0b0f7af93d0ffb0c8bb424d8a8c3aa305b578c439458eef081aba96ef0a026