三台虚拟机
注:没特意说明在那个节点执行意思就是全部都要
停止防火墙
systemctl disable firewalld systemctl stop firewalld
禁用SELinux
# 永久 关闭 sed -i 's/enforcing/disabled/' /etc/selinux/config # 重启 reboot #临时关闭 setenforce 0
关闭swap分区
# 永久 sed -ri 's/.*swap.*/#&/' /etc/fstab # 重启 reboot # 临时关闭swap分区 swapoff -a
在master节点上添加hosts
cat >> /etc/hosts << EOF 192.168.0.200 master 192.168.0.201 node1 192.168.0.202 node2 EOF
将桥接的IPv4流量传递到iptables的链
cat > /etc/sysctl.d/k8s.conf << EOF net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 net.ipv4.ip_forward = 1 vm.swappiness = 0 EOF
# 加载br_netfilter模块 modprobe br_netfilter # 查看是否加载 lsmod | grep br_netfilter # 生效 sysctl --system
开启ipvs
yum -y install ipset ipvsadm
cat > /etc/sysconfig/modules/ipvs.modules <授权、运行、检查是否加载:
chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4检查是否加载:
lsmod | grep -e ipvs -e nf_conntrack_ipv4安装docker
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo yum -y install docker-ce-18.06.3.ce-3.el7 #启动docker并设置开机自启动 systemctl enable docker && systemctl start docker设置Docker镜像加速:
# 创建docker配置目录 mkdir -p /etc/docker # 创建镜像配置文件 sudo tee /etc/docker/daemon.json <<-'EOF' { "exec-opts": ["native.cgroupdriver=systemd"], "registry-mirrors": ["https://8wxxnmd4.mirror.aliyuncs.com"] } EOF # 重启docker systemctl daemon-reload systemctl restart docker配置kubeadm阿里云的YUM软件源
cat > /etc/yum.repos.d/kubernetes.repo << EOF [kubernetes] name=Kubernetes baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=0 repo_gpgcheck=0 gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg EOF由于版本更新频繁,这里指定版本号部署:
yum install -y kubelet-1.18.0 kubeadm-1.18.0 kubectl-1.18.0为了实现Docker使用的cgroup drvier和kubelet使用的cgroup drver一致,建议修改"/etc/sysconfig/kubelet"文件的内容:
vim /etc/sysconfig/kubelet # 修改 KUBELET_EXTRA_ARGS="--cgroup-driver=systemd"设置为开机自启动即可,由于没有生成配置文件,集群初始化后自动启动:
systemctl enable kubelet部署k8s的Master节点# 由于默认拉取镜像地址k8s.gcr.io国内无法访问,这里需要指定阿里云镜像仓库地址 kubeadm init --apiserver-advertise-address=192.168.0.200 --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.18.0 --service-cidr=10.96.0.0/12 --pod-network-cidr=10.244.0.0/16根据提示执行命令
mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config查看节点
[root@master ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION master NotReady master 4m47s v1.18.0添加k8s的Node节点在192.168.0.201和192.168.0.202上添加如下的命令:
# 向k8s集群中添加Node节点 kubeadm join 192.168.0.200:6443 --token axgy03.n8nbeak54a5dr1gm --discovery-token-ca-cert-hash sha256:653055540c6cb5afe85dfc35a88d7634af2a57e86c602625edee3f7be2253068默认的token有效期为24小时,当过期之后,该token就不能用了,这时可以使用如下的命令创建token:
# 生成一个新的token kubeadm token create --print-join-command # 生成一个永不过期的token kubeadm token create --ttl 0部署CNI网络插件根据提示,在Master节点使用kubectl工具查看节点状态:
[root@master ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION master NotReady master 5m50s v1.18.0 node1 NotReady13s v1.18.0 node2 NotReady 13s v1.18.0 在Master节点部署CNI网络插件(可能会失败,如果失败,请下载到本地,然后安装):
# 直接部署 kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/documentation/kube-flannel.yml # 下载后部署 wget https://raw.githubusercontent.com/coreos/flannel/master/documentation/kube-flannel.yml [root@master k8s]# kubectl apply -f kube-flannel.yml podsecuritypolicy.policy/psp.flannel.unprivileged created clusterrole.rbac.authorization.k8s.io/flannel created clusterrolebinding.rbac.authorization.k8s.io/flannel created serviceaccount/flannel created configmap/kube-flannel-cfg created daemonset.apps/kube-flannel-ds created查看部署CNI网络插件进度:
kubectl get pods -n kube-system再次在Master节点使用kubectl工具查看节点状态:
kubectl get nodes查看集群健康状态:
kubectl get cs#查看集群信息 kubectl cluster-info安装UI管理界面在Mastr节点安装
下载recommended.yaml文件
项目开源地址 : https://github.com/kubernetes/dashboardwget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.1/aio/deploy/recommended.yaml修改yaml文件
新增type: NodePort 和 nodePort:31443,以便能实现非本机访问
kind: Service apiVersion: v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard spec: type: NodePort ports: - port: 443 targetPort: 8443 nodePort: 31443 selector: k8s-app: kubernetes-dashboardkubectl apply -f recommended.yaml创建一个admin-user
vim dashboard-adminuser.yamlapiVersion: v1 kind: ServiceAccount metadata: name: admin-user namespace: kubernetes-dashboardkubectl apply -f dashboard-adminuser.yaml创建一个集群角色
vim dashboard-ClusterRoleBinding.yamlapiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: admin-user roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: cluster-admin subjects: - kind: ServiceAccount name: admin-user namespace: kubernetes-dashboardkubectl apply -f dashboard-ClusterRoleBinding.yaml获取token
kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep admin-user | awk '{print $1}') Name: admin-user-token-fjr5w Namespace: kubernetes-dashboard Labels:Annotations: kubernetes.io/service-account.name: admin-user kubernetes.io/service-account.uid: 2889c0f4-2fbf-4005-ab06-c15873e89017 Type: kubernetes.io/service-account-token Data ==== ca.crt: 1025 bytes namespace: 20 bytes token: eyJhbGciOiJSUzI1NiIsImtpZCI6IjQwcmFuMG9Gcll4b1BWVE5kQ3ZDZkhkN0RWdWFURk1xWFdfZHFsbjhrWHcifQ.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.l80AoTuM5g_rOOT4svNozuW8fYzgPT_Jo7jlx40LDoWOYx-uSoCsZN2OzYNafqanUBs5I0gC-7chAmS3w3G6PNUlKCi07ANySC2iPm22BFzFxMsTP8vnY64rAvUgP3nCjAGPY2LSJY5KoyUrVai0rjCJUFKVDX-aGA_2w7_hYJ1JmS0K8joeFf3UYzMghOqaPwiwlze6yc3be3oPuD0FJNTQ4zDFMi_QhoUUINLjFMYjDg2lweWzLlGBSCPq7g-lkfbUonPYYB9k2IMHdDbS6NyQt7JCIK0dpgR4tY8l28-PNqOkBTYJh9BI-9mlzPFiviGnmzkZ5M3R5GMoFbSJ6g 访问k8s集群UI
访问 https://you_k8s_server_ip:31443/
输入上边的token就可以登入了
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