K8S部署攻略
此教程以一主二从为例,需要三台服务器。
主机最低需求:4 核 CPU,4 GB 内存,硬盘:20 GBx2 (需保留一个未分区的磁盘)
从机最低需求:4 核 CPU,8 GB 内存,硬盘:20 GBx2 (需保留一个未分区的磁盘)
软件版本:
Ubuntu : 22.04
K **ubesphere:**3.4.1
Docker **:**20.10.24
K 8s **:**1.23.17
**Rook:**1.13.6
1. 配置Cgroup驱动
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
},
"storage-driver": "overlay2",
"registry-mirrors": [
"https://hub-mirror.c.163.com/",
"https://dockerproxy.com/"
]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
2. 配置docker存储库,安装docker-ce
sudo apt-get update
sudo apt-get -y install apt-transport-https ca-certificates curl software-properties-common
sudo curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable"
sudo apt-get -y update
sudo apt-get -y install docker-ce=5:20.10.24~3-0~ubuntu-jammy
sudo systemctl enable docker && sudo systemctl start docker
3. 关闭交换分区
sudo swapoff -a
sudo vi /etc/fstab
注释掉swap行并保存
4. 允许 iptables 检查桥接流量
sudo modprobe br_netfilter
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
5. 安装 kubeadm、kubelet 和 kubectl
sudo apt-get update && sudo apt-get install -y apt-transport-https
sudo curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | sudo apt-key add -
sudo tee /etc/apt/sources.list.d/kubernetes.list <<-'EOF'
deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
EOF
sudo apt-get update
sudo apt-get install -y kubelet=1.23.17-00 kubeadm=1.23.17-00 kubectl=1.23.17-00
sudo systemctl enable kubelet && sudo systemctl start kubelet
6. 初始化控制平面节点(仅主节点执行)
sudo kubeadm init \
--image-repository registry.cn-hangzhou.aliyuncs.com/google_containers \
--kubernetes-version v1.23.17 \
--pod-network-cidr=10.244.0.0/16
出现如下信息表示初始化成功,将token(图中最后两行)复制保存,后面会用到,token有效期为24小时
执行命令:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
7. 安装 Pod 网络附加组件(仅主节点执行,方式二选一)
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 方式一: 下载文件:https://files.cnblogs.com/files/blogs/785788/kube-flannel.zip?t=1710498095&download=true 解压上传kube-flannel.yml文件至主节点用户根目录下,执行: sudo kubectl apply -f kube-flannel.yml |
| 方式二: sudo kubectl apply -f https://github.com/flannel-io/flannel/releases/latest/download/kube-flannel.yml |
执行命令查看安装是否完成
watch kubectl get pod -n kube-system -o wide
输出中检查 CoreDNS Pod 的STATUS直到变成 Running 表示完成(需要几分钟)
8. 配置hosts
sudo vi /etc/hosts
配置示例:
|----------------------------------------------------------|
| 192.168.1.100 k8s1 192.168.1.101 k8s2 192.168.1.102 k8s3 |
9. 从节点加入主节点
在从节点执行步骤六保存的token,注意非root用户前面加上sudo
sudo kubeadm join 192.168.1.100:6443 --token **** \
--discovery-token-ca-cert-hash sha256:****
成功输出:
失败可以关闭防火墙后重试:
sudo systemctl stop firewalld
sudo systemctl disable firewalld
完毕后,执行kubectl get nodes查看,等待所有节点状态变成Ready(需要几分钟)
10. 删除污点(仅主节点执行)
kubectl taint nodes <主节点名,比如k8s1> node-role.kubernetes.io/master:NoSchedule
11. 安装Rook-CephFS(仅主节点执行,方式二选一)
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 方式一: 下载文件:https://files.cnblogs.com/files/blogs/785788/rook-1.13.6.zip?t=1710498602&download=true 解压后把rook整个文件夹,上传到主节点用户根目录。 |
| 方式二: git clone --single-branch --branch v1.13.7 https://github.com/rook/rook.git |
执行命令:
cd /rook/deploy/examples
kubectl create -f crds.yaml -f common.yaml -f operator.yaml
kubectl create -f cluster.yaml
待安装完成(需要十分钟左右),使用 kubectl get pods -n rook-ceph 来确认安装进度,除 rook-ceph-osd-prepare-*** 以外,其他都要为Runing
12. 创建默认StorageClass,恢复污点(仅主节点执行)
cd /rook/deploy/examples
kubectl create -f filesystem.yaml
kubectl create -f csi/cephfs/storageclass.yaml
Kubectl patch storageclass rook-cephfs -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
kubectl taint nodes <主节点名,比如k8s1> node-role.kubernetes.io=master:NoSchedule
使用:kubectl get sc确认是否成功。
13. 安装KubeSphere(仅主节点执行)
kubectl apply -f https://github.com/kubesphere/ks-installer/releases/download/v3.4.1/kubesphere-installer.yaml
kubectl apply -f https://github.com/kubesphere/ks-installer/releases/download/v3.4.1/cluster-configuration.yaml
查看安装进度:
kubectl logs -n kubesphere-system $(kubectl get pod -n kubesphere-system -l 'app in (ks-install, ks-installer)' -o jsonpath='{.items[0].metadata.name}') -f
成功输出:
完结撒花!
附件:k8s部署攻略.doc