自己玩可以如果企业搭建先建 ETCD ，家里玩尽量用 Debian ，Ubuntu 等用的比较多的，别弄国产
要先弄 Keeplived + HA
*前提:*
```
1. 选择官方推荐版本并且不要选择最新版的
2. 国内存在着镜像拉取问题
3. 如果服务没起来需要看一下 containerd 服务
```
*准备工作:*
```
1. 确定机器的信息，操作系统，CPU 架构
1. 操作系统
2. CPU 架构
2. 时区设置
1. 配置系统时区: timedatectl set-timezone Asia/Shanghai
2. 设置本地 RTC 为 0: timedatectl set-local-rtc 0
3. 验证时区设置: timedatectl show --property=Timezone
4. 验证 RTC 设置: timedatectl show --property=RTC
3. 加载内核模块
*需要加载['br_netfilter', 'overlay']*
1. 查看/etc/modules-load.d,目录是否存在内核模块文件: ls /etc/modules-load.d/ | grep "k8s.conf"
2. 如果不存在
1. 创建模块加载配置文件: vi k8s.conf
2. 写入模块加载文件：tee >
<<EOF br_netfilter \n overlay \n EOF
3. 临时加载模块: modprobe overlay br_netfilter
4. 加载模块：
5. 验证模块是否成功加载
4. 关闭防火墙
1. 常用的防火墙: ['firewalld', 'ufw', 'iptables']
2. 检查服务是否运行: systemctl is-active <service-name>
3. 禁用防火墙服务
1. 停止服务: systemctl stop <service-name>
2. 禁止开机自启: systemctl disable <serivce-name>
4. 额外操作:
firewalld: firewall-cmd --state && firewall-cmd --permanent --shutdown
ufw: ufw disable
iptables: iptables -F && iptables -X && iptables -t nat -F && iptables -t nat -X && iptables -t mangle -F && iptables -t manage -X
5. 交换分区
1. 检查交换分区: free -h && swapon --show
2. 临时关闭交换分区: swapoff -a
3. 永久关闭交换分区
1. 注释掉
文件中关于 swap 的配置:
6. 修改内核参数：
1. net.bridge.bridge-nf-call-ip6tables = 1
2. net.bridge.bridge-nf-call-iptables = 1
3. net.ipv4.ip_forward = 1
```
*部署组件:*
````
Dokcer [
https://download.docker.com/linux/static/stable/](
https://download.docker.com/linux/static/stable/?_gl=1*1w17yhs*_ga*OTg3MzYwNS4xNzQzOTA0MTQ2*_ga_XJWPQMJYHQ*MTc0NDYwMDEwMC4zLjEuMTc0NDYwMDExNi40NC4wLjA.)
```
export KUBE_VERSION=<version>
export ARCH=<arch>
export KUBEADM_URL=
https://dl.k8s.io/release/<KUBE_VERSION>/bin/linux/<ARCH>/kubeadm
export KUBECTL_URL=
https://dl.k8s.io/release/<KUBE_VERSION>/bin/linux/<ARCH>/kubectl
export KUBELET_URL=
https://dl.k8s.io/release/<KUBE_VERSION>/bin/linux/<ARCH>/kubelet
```
1. 安装 Docker：
1. 下载安装包: curl -OL <docker_url>
2. 解压安装包: tar -xf <tar_name> && sudo mv docker/* /usr/local/bin/
2. 安装 kubeadm,kubectl,kubelet:
1. 下载二进制: curl -OL $(echo $KUBEADM_URL) && curl -OL $(echo $KUBECTL_URL) && curl -OL $(echo $KUBECTL_URL)
2. 移动文件位置: chmod +x kubeadm kubectl kubelet && sudo mv kubeadm kubectl kubelet /usr/local/bin/
3. 创建 containerd.service:
1. 创建 containerd 配置文件:
2. 创建 containerd 服务文件:
```
[Unit]
Description=containerd container runtime
Documentation=
https://containerd.io After=network.target local-fs.target
Wants=network.target
[Service]
Type=notify
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
TimeoutStartSec=0
RestartSec=10
Restart=always
Delegate=yes
KillMode=process
OOMScoreAdjust=-999
LimitNOFILE=1048576
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Environment="CGROUP_DRIVER=systemd"
[Install]
WantedBy=multi-user.target
```
4. 创建 docker.service:
1. 创建 docker 服务文件: /etc/systemd/system/docker.service
```
[Unit]
Description=Docker Application Container Engine
Documentation=
https://docs.docker.com BindsTo=containerd.service
After=network-online.target containerd.service
Wants=network-online.target
[Service]
Type=notify
ExecStart=/usr/local/bin/dockerd --containerd=/run/containerd/containerd.sock
Restart=always
RestartSec=5
TimeoutStartSec=0
Delegate=yes
KillMode=process
OOMScoreAdjust=-999
LimitNOFILE=1048576
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
EnvironmentFile=-/etc/docker/daemon.json
[Install]
WantedBy=multi-user.target
```
5. 创建 kubeadm-kubelet 配置:
1. 创建 kubeadm-kubelet: /usr/lib/systemd/system/kubelet.service.d/10-kubeadm.conf
```
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=
/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf"
Environment="KUBELET_CONFIG_ARGS=--config=/var/lib/kubelet/config.yaml"
EnvironmentFile=-/var/lib/kubelet/kubeadm-flags.env
EnvironmentFile=-/etc/sysconfig/kubelet
ExecStart=
ExecStart=/usr/local/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS
```
6. 创建 kubelet.service:
*非必须*
1.创建 kubelet 服务文件: /etc/systemd/system/kubelet.service
```
[Unit]
Description=kubelet: The Kubernetes Node Agent
Documentation=
https://kubernetes.io/docs/home/ Wants=network-online.target
After=network-online.target
[Service]
ExecStart=/usr/local/bin/kubelet
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=multi-user.target
```
7. 启动服务
1. 重载 systemd 配置: systemctl daemon-reload
2. 组件加入开机自启:
1. containerd: systemctl enable --now containerd.service
2. docker: systemctl enable --now docker.service
3. kubelet: systemctl enable --now kubelet.service
````
*部署 k8s*
````
```bash
#!/bin/bash
# 这里因为环境的不同的只提供一个基础的模版
# <*> 需要按环境替换
# <cri_socket> 默认地址: unix:///run/containerd/containerd.sock
# <controlPlaneEndpoint> 部署多 master 需要这个控制平台地址不能为空
# <san> apiservice 通过证书 san 校验，被请求的地址是否在证书内
# <serviceSubnet> k8s 服务网络段
# <podSubnet> k8s Pod 网络段
# <etcd_data_dir> etcd 存储的地址
# 具体的配置可以仔细阅读
https://kubernetes.io/zh-cn/docs/reference/setup-tools/kubeadmtee kubeadm-init.conf << EOF
apiVersion:
kubeadm.k8s.io/v1beta4bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: <bootstrapTokens_token>
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: <localAPIEndpoint>
bindPort: <bind_port>
nodeRegistration:
criSocket: <cri_socket>
imagePullPolicy: IfNotPresent
imagePullSerial: true
timeouts:
controlPlaneComponentHealthCheck: 4m0s
discovery: 5m0s
etcdAPICall: 2m0s
kubeletHealthCheck: 4m0s
kubernetesAPICall: 1m0s
tlsBootstrap: 5m0s
upgradeManifests: 5m0s
---
apiVersion:
kubeadm.k8s.io/v1beta4certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
apiServer:
certSANs:
- <san>
controlPlaneEndpoint: <controlPlaneEndpoint>
controllerManager: {}
dns: {}
encryptionAlgorithm: RSA-2048
etcd:
local:
dataDir: <etcd_data_dir>
imageRepository:
registry.k8s.iokind: ClusterConfiguration
kubernetesVersion: 1.32.3
networking:
dnsDomain: cluster.local
serviceSubnet: <serviceSubnet>
podSubnet: <podSubnet>
proxy: {}
scheduler: {}
---
apiVersion:
kubeproxy.config.k8s.io/v1alpha1kind: KubeProxyConfiguration
mode: "iptables"
EOF
# 启动 k8s
kubeadm init --config kubeadm-init.conf
```
# 后续: 可以根据需要部署 CNI,CSI
# CNI:
# export calico_version=v3.27.4
# calico :
https://raw.githubusercontent.com/projectcalico/calico/$calico_version/manifests/calico.yaml# CSI: NFS 这个很简单!,CEPH 部署麻烦些
````
*额外的说明*
```
*k8s 加入节点*
1. 如果初始化的没有配置 controlPlaneEndpoint ，现在需要加 master 节点
1. 配置控制平面地址: kubeadm init --control-plane-endpoint <control-plane-endpoint> --upload-certs
2. 加入 control_plane
1. 创建新的令牌: kubeadm token create --print-join-command --certificate-key $(kubeadm init phase upload-certs --upload-certs | tail -n 1)
3. 加入 worker
1. 创建新的令牌: kubeadm token create --print-join-command
*k8s 镜像*
1. 查看镜像：kubeadm config images list
```