ubuntu20.04搭建k8s（1.26.3） |
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安装环境
Ubuntu20.04LTS Server 安装准备一、设置固定IP sudo -s # 切换root权限 vim /etc/netplan/00-installer-config.yaml # 修改如下内容 # This is the network config written by 'subiquity' network: ethernets: ens33: dhcp4: no #dhcp4关闭 addresses: [192.168.0.128/24] #设置本机IP及掩码 gateway4: 192.168.0.1 #设置网关 nameservers: addresses: [114.114.114.114, 8.8.8.8] #设置DNS version: 2 sudo netplan apply # 应用二、创建root用户 passwd root sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config systemctl restart sshd三、修改hostname（需要可以修改） # 修改主机名 vim /etc/hostname # 修改对应主机名 vim /etc/hosts # 需要重启 reboot四、关闭防火墙 systemctl stop ufw五、关闭swap分区 临时关闭 swapoff -a永久关闭 vim /etc/fstab # 注释掉对应的一行，例如： #/swapfile none swap sw 0 0 echo "vm.swappiness = 0">> /etc/sysctl.conf swapoff -a && swapon -a #刷新SWAP sysctl -p #执行使其生效，不用重启系统 安装切换root账号登陆 配置apt源 cp /etc/apt/sources.list /etc/apt/sources.list.bak echo "" > /etc/apt/sources.list cat > /etc/apt/sources.list deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse deb https://mirrors.aliyun.com/kubernetes/apt kubernetes-xenial main EOF添加 Kubernetes 仓库的 GPG 密钥： curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | sudo apt-key add -更新apt源 apt update安装依赖包 apt-get install -y apt-transport-https ca-certificates curl software-properties-common安装kubeadm, kubelet 和 kubectl apt install -y kubectl=1.26.3-00 kubelet=1.26.3-00 kubeadm=1.26.3-00安装containerd apt install -y containerd mkdir -p /etc/containerd containerd config default | sudo tee /etc/containerd/config.toml systemctl restart containerd apt-get install -y bridge-utils modprobe br_netfilter echo "net.ipv4.ip_forward = 1" | sudo tee -a /etc/sysctl.conf sysctl -p查看需要的镜像 kubeadm config images list # 执行这个命令，下面是结果 registry.k8s.io/kube-apiserver:v1.26.3 registry.k8s.io/kube-controller-manager:v1.26.3 registry.k8s.io/kube-scheduler:v1.26.3 registry.k8s.io/kube-proxy:v1.26.3 registry.k8s.io/pause:3.9 registry.k8s.io/etcd:3.5.6-0 registry.k8s.io/coredns/coredns:v1.9.3这里有个坑是kubelet去启动的时候会去拉registry.k8s.io/pause:3.6的镜像，所以我在后面拉取镜像的时候把这个版本也拉了。 准备镜像 拉取 crictl -r unix:///run/containerd/containerd.sock pull registry.aliyuncs.com/google_containers/kube-apiserver:v1.26.3 crictl -r unix:///run/containerd/containerd.sock pull registry.aliyuncs.com/google_containers/kube-proxy:v1.26.3 crictl -r unix:///run/containerd/containerd.sock pull registry.aliyuncs.com/google_containers/kube-controller-manager:v1.26.3 crictl -r unix:///run/containerd/containerd.sock pull registry.aliyuncs.com/google_containers/kube-scheduler:v1.26.3 crictl -r unix:///run/containerd/containerd.sock pull registry.aliyuncs.com/google_containers/pause:3.9 crictl -r unix:///run/containerd/containerd.sock pull registry.aliyuncs.com/google_containers/pause:3.6 crictl -r unix:///run/containerd/containerd.sock pull registry.aliyuncs.com/google_containers/etcd:3.5.6-0 crictl -r unix:///run/containerd/containerd.sock pull registry.aliyuncs.com/google_containers/coredns:v1.9.3tag镜像 ctr -n k8s.io images tag registry.aliyuncs.com/google_containers/kube-apiserver:v1.26.3 registry.k8s.io/kube-apiserver:v1.26.3 ctr -n k8s.io images tag registry.aliyuncs.com/google_containers/kube-proxy:v1.26.3 registry.k8s.io/kube-proxy:v1.26.3 ctr -n k8s.io images tag registry.aliyuncs.com/google_containers/kube-controller-manager:v1.26.3 registry.k8s.io/kube-controller-manager:v1.26.3 ctr -n k8s.io images tag registry.aliyuncs.com/google_containers/kube-scheduler:v1.26.3 registry.k8s.io/kube-scheduler:v1.26.3 ctr -n k8s.io images tag registry.aliyuncs.com/google_containers/pause:3.9 registry.k8s.io/pause:3.9 ctr -n k8s.io images tag registry.aliyuncs.com/google_containers/pause:3.6 registry.k8s.io/pause:3.6 ctr -n k8s.io images tag registry.aliyuncs.com/google_containers/etcd:3.5.6-0 registry.k8s.io/etcd:3.5.6-0 ctr -n k8s.io images tag registry.aliyuncs.com/google_containers/coredns:v1.9.3 registry.k8s.io/coredns/coredns:v1.9.3查看镜像 crictl -r unix:///run/containerd/containerd.sock image初始化 control-plane kubeadm init --kubernetes-version=v1.26.3 --apiserver-advertise-address 192.168.0.128 --pod-network-cidr=10.244.0.0/16 --ignore-preflight-errors=Swap记录下k8s join 的token，方便后续节点加入 kubeadm join 192.168.0.128:6443 --token {xxx}加载环境变量 mkdir -p $HOME/.kube cp -i /etc/kubernetes/admin.conf $HOME/.kube/config chown $(id -u):$(id -g) $HOME/.kube/config export KUBECONFIG=/etc/kubernetes/admin.conf echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.profile source ~/.profile部署网络插件 wget https://docs.projectcalico.org/v3.25/manifests/calico.yaml -O calico.yaml kubectl apply -f calico.yaml测试是否ok kubectl get node NAME STATUS ROLES AGE VERSION master Ready control-plane 4m28s v1.26.3 kubectl get pods -A NAMESPACE NAME READY STATUS RESTARTS AGE kube-system calico-kube-controllers-57b57c56f-96sf7 1/1 Running 0 12m kube-system calico-node-7mdrh 1/1 Running 0 12m kube-system coredns-787d4945fb-2chlh 1/1 Running 0 16m kube-system coredns-787d4945fb-lzdbt 1/1 Running 0 16m kube-system etcd-master 1/1 Running 0 16m kube-system kube-apiserver-master 1/1 Running 0 16m kube-system kube-controller-manager-master 1/1 Running 0 16m kube-system kube-proxy-8z2bx 1/1 Running 0 16m kube-system kube-scheduler-master 1/1 Running 0 16m设置kubectl自动补全命令 安装bash-completion apt-get install bash-completion重新启动你的 shell 会话或者运行 source /etc/profile 以应用更改 echo 'source |
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