kubeadm部署k8s

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1.配置主机hosts（所有主机上） cat >> /etc/hosts << EOF 192.168.0.232 k8s-master 192.168.0.117 k8s-node1 EOF   2.关闭防火墙和安全设置 systemctl stop firewalld systemctl disable firewalld   setenforce 0 sed -i 's/^SELINUX=enforcing$/SELINUX=disabled/' /etc/selinux/config sed -i 's/^SELINUX=permissive$/SELINUX=disabled/' /etc/selinux/config   3.关闭swap分区 swapoff -a sed -i "s/\/dev\/mapper\/centos-swap*/#&/" /etc/fstab   4.时间同步 yum -y install ntpdate 在 /etc/rc.local 文件末尾加入 ntpdate 和 hwclock 命令（全路径）： /usr/sbin/ntpdate 0.cn.pool.ntp.org /sbin/hwclock -w   5.修改主机名 hostnamectl set-hostname k8s-master hostnamectl set-hostname k8s-node1     6.重启生效 reboot     7.配置免密码登录 7.1在每个节点都执行ssh-keygen产生公私钥对，都选缺省值，一路回车即可。   ssh-keygen   7.2用ssh-copy-id将本节点的公钥复制到其它节点 如k8s-master节点，需要将公钥复制到k8s-node1、k8s-node2和k8s-node3三个节点，其它节点都要类似操作。   ssh-copy-id -p 16384 k8s-node1 ssh-copy-id k8s-node2 ssh-copy-id k8s-node3   8.修改内核参数（所有机器） cat > /etc/sysctl.d/k8s.conf <<EOF net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 net.ipv4.ip_nonlocal_bind = 1 net.ipv4.ip_forward = 1 vm.swappiness=0 EOF   modprobe br_netfilter sysctl  --system   9.Kube-proxy开启ipvs #Kubernetes开启ipvs路由转发，而不是使用iptables，如果不开启ipvs，则默认使用的是iptables cat > /etc/modules-load.d/ipvs.conf <<EOF # Load IPVS at boot ip_vs ip_vs_rr ip_vs_wrr ip_vs_sh nf_conntrack_ipv4 EOF   systemctl enable --now systemd-modules-load.service    9.1 确认内核模块加载成功 lsmod | grep -e ip_vs -e nf_conntrack_ipv4 # or cut -f1 -d " "  /proc/modules | grep -e ip_vs -e nf_conntrack_ipv4    9.2 安装ipset、ipvsadm yum install -y ipset ipvsadm     10.设置Kubernetes yum源 cat <<eof> kubernetes.repo [kubernetes] name=kubernetes baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgchek=1 gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg eof   11.安装kubernetes yum list kubeadm --showduplicates | sort -r yum -y install kubeadm-1.22.0 kubectl-1.22.0 kubelet-1.22.0 #生产环境一般使用小版本≥5；该版本会要求下载K8S 1.15.*镜像； yum list kube* #默认配置的pause镜像使用改成人gcr.io仓库，以下修改kubelet为阿里云的pause镜像源； cat <<eof> /etc/sysconfig/kubelet KUBELET_EXTRA_ARGS="--cgroup-driver=systemd --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.2" eof cat /etc/sysconfig/kubelet systemctl enable --now kubelet.service systemctl status kubelet.service kubeadm version;kubelet --version;kubectl version <br>#------------------------------ 以上内容在master和node所有机器上执行---------------------------------#<br>

 

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12.master节点拉取镜像 kubeadm config images pull --image-repository=registry.aliyuncs.com/google_containers docker images   13.master节点初始化 kubeadm init --kubernetes-version=v1.22.0 \   --pod-network-cidr=10.244.0.0/16 \   --service-cidr=10.1.0.0/16 \   --image-repository=registry.aliyuncs.com/google_containers     13.1 初始化时候的信息 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/   Then you can join any number of worker nodes by running the following on each as root:   kubeadm join 192.168.0.232:6443 --token t30op2.6tbai2kjcfqj5kb5 \     --discovery-token-ca-cert-hash sha256:ddc5d033714bc93517c69f6d61ccd6d5224d134d0860ffede0b08c01ec279723     13.2 执行kubernetes配置   mkdir -p $HOME/.kube   sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config   sudo chown $(id -u):$(id -g) $HOME/.kube/config     14.calico网络插件安装 wget https://docs.projectcalico.org/manifests/calico.yaml kubectl apply -f calico.yaml wget https://github.com/projectcalico/calicoctl/releases/download/v3.5.4/calicoctl -O /usr/bin/calicoctl chmod +x /usr/bin/calicoctl   #------------------------------ 以上内容在master节点机器上执行---------------------------------#     15.node节点加入集群（在所有node节点执行） kubeadm join 192.168.0.232:6443 --token t30op2.6tbai2kjcfqj5kb5 \     --discovery-token-ca-cert-hash sha256:ddc5d033714bc93517c69f6d61ccd6d5224d134d0860ffede0b08c01ec279723     16.K8s Node节点ROLES为none修改 kubectl get nodes<br>#查看所有标签<br>kubectl get nodes --show-labels kubectl label node k8s-node1 node-role.kubernetes.io/worker=worker

 

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17.kubectl命令自动补全 1.安装bash-completion工具   $ yum install bash-completion -y 否则报错：   -bash: _get_comp_words_by_ref: command not found 2.执行bash_completion   $ source /usr/share/bash-completion/bash_completion 3.加载kubectl completion   $ source <(kubectl completion bash) # 在 bash 中设置当前 shell 的自动补全，要先安装 bash-completion 包。 $ echo "source <(kubectl completion bash)" >> ~/.bashrc # 在您的 bash shell 中永久的添加自动补全

 

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#pv删除失败处理 kubectl get pv kubectl delete pv xxx 解决办法： # 把default-pv换成你自己的pv名字即可 kubectl patch pv default-pv -p '{"metadata":{"finalizers":null}}'

　　

 

问题总结：

不能使用mysql_pv这样的命名方式