前言：半月前在公司生产环境上离线部署了k8s集群 和 Prometheus+Grafana监控平台的搭建，下面我租用3台华为云服务器演示在线方式部署k8s（单master节点）+prometheus集群。下期再出一版离线方式部署k8s(双master节点）集群。
安装步骤：
安装Docker
安装Kubernetes
安装KubeSphere前置环境
安装KubeSphere
1.安装Docker
配置docker的yum源地址
yum -y install wget
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
yum provides docker-ce
安装指定的docker版本
yum install -y docker-ce-20.10.7 docker-ce-cli-20.10.7 containerd.io-1.4.6
# 启动&开机启动docker
systemctl enable docker --now
# docker加速配置
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{"registry-mirrors": ["https://82m9ar63.mirror.aliyuncs.com"],"exec-opts": ["native.cgroupdriver=systemd"],"log-driver": "json-file","log-opts": {"max-size": "100m"},"storage-driver": "overlay2"
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
2.安装kubernetes环境
2.1、基本环境
#设置每个机器自己的hostname
hostnamectl set-hostname xxx
hostnamectl set-hostname k8s-master1 && bash
hostnamectl set-hostname k8s-node1 && bash
hostnamectl set-hostname k8s-node2 && bash添加hosts解析（所有节点操作）
cat >> /etc/hosts << EOF
192.168.0.182 k8s-master1
192.168.0.145 k8s-node1
192.168.0.28 k8s-node2
EOF# 将 SELinux 设置为 permissive 模式（相当于将其禁用）
sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config#关闭swap
swapoff -a
sed -ri 's/.*swap.*/#&/' /etc/fstab#将桥接的IPv4流量传递到iptables的链：
vim etc/sysctl.d/k8s.conf
添加：
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1sysctl --system 时间同步：
yum install ntpdate -y
ntpdate time.windows.com
2.2、安装kubelet、kubeadm、kubectl
配置kubelet kubeadm kubectl 的yum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安装指定版本的kubeadm kubectl kubelet
sudo yum install -y kubelet-1.20.9 kubeadm-1.20.9 kubectl-1.20.9启动kubelet
systemctl enable kubelet
2.3.初始化master节点
2.3.1初始化
kubeadm init --apiserver-advertise-address=192.168.0.182 --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.20.9 --service-cidr=10.96.0.0/12 --pod-network-cidr=10.244.0.0/16 --ignore-preflight-errors=all
2.3.2记录关键的信息
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/.kubesudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/configsudo chown $(id -u):$(id -g) $HOME/.kube/configAlternatively, if you are the root user, you can run:export KUBECONFIG=/etc/kubernetes/admin.confYou 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 192.168.0.182:6443 --token nbm1b1.zbd9dx9c1yvp1ebn \
--discovery-token-ca-cert-hash sha256:98c66d83855f52326939d916c21fc254359c771285932d72d15733c3f4972f52
2.3.3、安装Calico网络插件
curl https://docs.projectcalico.org/manifests/calico.yaml -O
kubectl apply -f calico.yaml
2.3.4、加入worker节点
将master节点初始化的结果命令如下，复制到各个节点
kubeadm join 192.168.0.182:6443 --token nbm1b1.zbd9dx9c1yvp1ebn --discovery-token-ca-cert-hash sha256:98c66d83855f52326939d916c21fc254359c771285932d72d15733c3f4972f52
3、安装KubeSphere前置环境
3.1、nfs文件系统
3.1.1、安装nfs-server
# 在每个机器。
yum install -y nfs-utils## 创建了一个存储类,文件命名为sc.yaml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:name: nfs-storageannotations:storageclass.kubernetes.io/is-default-class: "true"
provisioner: k8s-sigs.io/nfs-subdir-external-provisioner
parameters:archiveOnDelete: "true" ## 删除pv的时候，pv的内容是否要备份---
apiVersion: apps/v1
kind: Deployment
metadata:name: nfs-client-provisionerlabels:app: nfs-client-provisioner# replace with namespace where provisioner is deployednamespace: default
spec:replicas: 1strategy:type: Recreateselector:matchLabels:app: nfs-client-provisionertemplate:metadata:labels:app: nfs-client-provisionerspec:serviceAccountName: nfs-client-provisionercontainers:- name: nfs-client-provisionerimage: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/nfs-subdir-external-provisioner:v4.0.2# resources:# limits:# cpu: 10m# requests:# cpu: 10mvolumeMounts:- name: nfs-client-rootmountPath: /persistentvolumesenv:- name: PROVISIONER_NAMEvalue: k8s-sigs.io/nfs-subdir-external-provisioner- name: NFS_SERVERvalue: 192.168.0.182 ## 指定自己nfs服务器地址- name: NFS_PATH value: /nfs/data ## nfs服务器共享的目录volumes:- name: nfs-client-rootnfs:server: 192.168.0.182path: /nfs/data
---
apiVersion: v1
kind: ServiceAccount
metadata:name: nfs-client-provisioner# replace with namespace where provisioner is deployednamespace: default
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:name: nfs-client-provisioner-runner
rules:- apiGroups: [""]resources: ["nodes"]verbs: ["get", "list", "watch"]- apiGroups: [""]resources: ["persistentvolumes"]verbs: ["get", "list", "watch", "create", "delete"]- apiGroups: [""]resources: ["persistentvolumeclaims"]verbs: ["get", "list", "watch", "update"]- apiGroups: ["storage.k8s.io"]resources: ["storageclasses"]verbs: ["get", "list", "watch"]- apiGroups: [""]resources: ["events"]verbs: ["create", "update", "patch"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:name: run-nfs-client-provisioner
subjects:- kind: ServiceAccountname: nfs-client-provisioner# replace with namespace where provisioner is deployednamespace: default
roleRef:kind: ClusterRolename: nfs-client-provisioner-runnerapiGroup: rbac.authorization.k8s.io
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:name: leader-locking-nfs-client-provisioner# replace with namespace where provisioner is deployednamespace: default
rules:- apiGroups: [""]resources: ["endpoints"]verbs: ["get", "list", "watch", "create", "update", "patch"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:name: leader-locking-nfs-client-provisioner# replace with namespace where provisioner is deployednamespace: default
subjects:- kind: ServiceAccountname: nfs-client-provisioner# replace with namespace where provisioner is deployednamespace: default
roleRef:kind: Rolename: leader-locking-nfs-client-provisionerapiGroup: rbac.authorization.k8s.io#执行kubectl apply -f sc.yaml
#查看相关的存储，确认配置是否生效
kubectl get sc
3.2、安装metrics-server
集群指标监控组件，文件命名为metrics-server.yaml
apiVersion: v1
kind: ServiceAccount
metadata:labels:k8s-app: metrics-servername: metrics-servernamespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:labels:k8s-app: metrics-serverrbac.authorization.k8s.io/aggregate-to-admin: "true"rbac.authorization.k8s.io/aggregate-to-edit: "true"rbac.authorization.k8s.io/aggregate-to-view: "true"name: system:aggregated-metrics-reader
rules:
- apiGroups:- metrics.k8s.ioresources:- pods- nodesverbs:- get- list- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:labels:k8s-app: metrics-servername: system:metrics-server
rules:
- apiGroups:- ""resources:- pods- nodes- nodes/stats- namespaces- configmapsverbs:- get- list- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:labels:k8s-app: metrics-servername: metrics-server-auth-readernamespace: kube-system
roleRef:apiGroup: rbac.authorization.k8s.iokind: Rolename: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccountname: metrics-servernamespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:labels:k8s-app: metrics-servername: metrics-server:system:auth-delegator
roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: system:auth-delegator
subjects:
- kind: ServiceAccountname: metrics-servernamespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:labels:k8s-app: metrics-servername: system:metrics-server
roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: system:metrics-server
subjects:
- kind: ServiceAccountname: metrics-servernamespace: kube-system
---
apiVersion: v1
kind: Service
metadata:labels:k8s-app: metrics-servername: metrics-servernamespace: kube-system
spec:ports:- name: httpsport: 443protocol: TCPtargetPort: httpsselector:k8s-app: metrics-server
---
apiVersion: apps/v1
kind: Deployment
metadata:labels:k8s-app: metrics-servername: metrics-servernamespace: kube-system
spec:selector:matchLabels:k8s-app: metrics-serverstrategy:rollingUpdate:maxUnavailable: 0template:metadata:labels:k8s-app: metrics-serverspec:containers:- args:- --cert-dir=/tmp- --kubelet-insecure-tls- --secure-port=4443- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname- --kubelet-use-node-status-portimage: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/metrics-server:v0.4.3imagePullPolicy: IfNotPresentlivenessProbe:failureThreshold: 3httpGet:path: /livezport: httpsscheme: HTTPSperiodSeconds: 10name: metrics-serverports:- containerPort: 4443name: httpsprotocol: TCPreadinessProbe:failureThreshold: 3httpGet:path: /readyzport: httpsscheme: HTTPSperiodSeconds: 10securityContext:readOnlyRootFilesystem: truerunAsNonRoot: truerunAsUser: 1000volumeMounts:- mountPath: /tmpname: tmp-dirnodeSelector:kubernetes.io/os: linuxpriorityClassName: system-cluster-criticalserviceAccountName: metrics-servervolumes:- emptyDir: {}name: tmp-dir
---
apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:labels:k8s-app: metrics-servername: v1beta1.metrics.k8s.io
spec:group: metrics.k8s.iogroupPriorityMinimum: 100insecureSkipTLSVerify: trueservice:name: metrics-servernamespace: kube-systemversion: v1beta1versionPriority: 100#执行 kubectl apply -f metrics-server.yaml
4、安装KubeSphere
4.1下载相关的配置文件
wget https://github.com/kubesphere/ks-installer/releases/download/v3.1.1/kubesphere-installer.yaml
wget https://github.com/kubesphere/ks-installer/releases/download/v3.1.1/cluster-configuration.yaml
4.2、修改cluster-configuration
在 cluster-configuration.yaml中指定我们需要开启的功能
参照官网“启用可插拔组件”
https://kubesphere.com.cn/docs/pluggable-components/overview/
4.3、执行安装
kubectl apply -f kubesphere-installer.yaml
kubectl apply -f cluster-configuration.yaml
这里的报错是和API版本有关系
解决方法:vim kubesphere-installer.yaml 将找到的每个 apiextensions.k8s.io/v1beta1 更改为 apiextensions.k8s.io/v1
启动cluster-configuration.yaml无报错，忘了截图
4.4、查看安装进度
kubectl logs -n kubesphere-system $(kubectl get pod -n kubesphere-system -l app=ks-install -o jsonpath='{.items[0].metadata.name}') -f
访问 ： http://192.168.0.182:30880
账号 ： admin
密码 ： P@88w0rd
4.5、查看集群状态和pod
kubectl get nodes
kubectl get pods -A
