一. 安裝docker

1.添加yum國內依賴

yum -y install yum-utils yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

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2.安裝docker

yum -y install docker-ce docker-ce-cli containerd.io

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3.啟動docker

systemctl start docker

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4.添加開機自啟

systemctl enable docker

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二.安裝k8s

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1.配置k8s 國內yum源

cat <<EOF > /etc/yum.repos.d/kubernetes.repo [kubernetes] name=Kubernetes baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/ enabled=1 gpgcheck=1 repo_gpgcheck=1 gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg EOF setenforce 0 yum install -y kubelet kubeadm kubectl systemctl enable kubelet && systemctl start kubelet

或者

## 新建k8s.repo文件 vim /etc/yum.repo.d/k8s.repo ## 添加下面內容 [kubernetes] name=Kubernetes baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/ enabled=1 gpgcheck=1 repo_gpgcheck=1 gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

2.安裝kubeadm,kubelet, kubectl

yum install -y kubelet kubernetes-cni kubeadm # 設置開機自啟并立即啟動 systemctl enable kubelet systemctl start kubelet

3.配置kubeadm.yml并下載所需鏡像

vim kubeadm.yaml

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apiVersion: kubeadm.k8s.io/v1beta2 kind: ClusterConfiguration kubernetesVersion: v1.19.3 imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers networking:serviceSubnet: "10.96.0.0/12"podSubnet: "10.244.0.0/16"

拉取鏡像（可能需要先修改主機名：hostnamectl set-hostname young）

kubeadm --config kubeadm.yaml config images pull

4.修改鏡像tag(注意版本，按照你的版本修改)

docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.19.3 k8s.gcr.io/kube-apiserver:v1.19.3 docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.19.3 k8s.gcr.io/kube-controller-manager:v1.19.3 docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.19.3 k8s.gcr.io/kube-scheduler:v1.19.3 docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.19.3 k8s.gcr.io/kube-proxy:v1.19.3 docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.2 k8s.gcr.io/pause:3.2 docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.4.13-0 k8s.gcr.io/etcd:3.4.13-0 docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.7.0 k8s.gcr.io/coredns:1.7.0

5.初始化k8s集群（注意版本）

sudo swapoff -akubeadm init --kubernetes-version=1.19.3 --pod-network-cidr=10.244.0.0/16 --ignore-preflight-errors=NumCPU

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6.配置環境變量

mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config

7.安裝配置網絡

docker pull quay.io/coreos/flannel:v0.13.0

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kube-flannel.ym內容如下

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apiVersion: policy/v1beta1 kind: PodSecurityPolicy metadata:name: psp.flannel.unprivilegedannotations:seccomp.security.alpha.kubernetes.io/allowedProfileNames: docker/defaultseccomp.security.alpha.kubernetes.io/defaultProfileName: docker/defaultapparmor.security.beta.kubernetes.io/allowedProfileNames: runtime/defaultapparmor.security.beta.kubernetes.io/defaultProfileName: runtime/default spec:privileged: falsevolumes:- configMap- secret- emptyDir- hostPathallowedHostPaths:- pathPrefix: "/etc/cni/net.d"- pathPrefix: "/etc/kube-flannel"- pathPrefix: "/run/flannel"readOnlyRootFilesystem: false# Users and groupsrunAsUser:rule: RunAsAnysupplementalGroups:rule: RunAsAnyfsGroup:rule: RunAsAny# Privilege EscalationallowPrivilegeEscalation: falsedefaultAllowPrivilegeEscalation: false# CapabilitiesallowedCapabilities: ['NET_ADMIN', 'NET_RAW']defaultAddCapabilities: []requiredDropCapabilities: []# Host namespaceshostPID: falsehostIPC: falsehostNetwork: truehostPorts:- min: 0max: 65535# SELinuxseLinux:# SELinux is unused in CaaSPrule: 'RunAsAny' --- kind: ClusterRole apiVersion: rbac.authorization.k8s.io/v1 metadata:name: flannel rules: - apiGroups: ['extensions']resources: ['podsecuritypolicies']verbs: ['use']resourceNames: ['psp.flannel.unprivileged'] - apiGroups:- ""resources:- podsverbs:- get - apiGroups:- ""resources:- nodesverbs:- list- watch - apiGroups:- ""resources:- nodes/statusverbs:- patch --- kind: ClusterRoleBinding apiVersion: rbac.authorization.k8s.io/v1 metadata:name: flannel roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: flannel subjects: - kind: ServiceAccountname: flannelnamespace: kube-system --- apiVersion: v1 kind: ServiceAccount metadata:name: flannelnamespace: kube-system --- kind: ConfigMap apiVersion: v1 metadata:name: kube-flannel-cfgnamespace: kube-systemlabels:tier: nodeapp: flannel data:cni-conf.json: |{"name": "cbr0","cniVersion": "0.3.1","plugins": [{"type": "flannel","delegate": {"hairpinMode": true,"isDefaultGateway": true}},{"type": "portmap","capabilities": {"portMappings": true}}]}net-conf.json: |{"Network": "10.244.0.0/16","Backend": {"Type": "vxlan"}} --- apiVersion: apps/v1 kind: DaemonSet metadata:name: kube-flannel-dsnamespace: kube-systemlabels:tier: nodeapp: flannel spec:selector:matchLabels:app: flanneltemplate:metadata:labels:tier: nodeapp: flannelspec:affinity:nodeAffinity:requiredDuringSchedulingIgnoredDuringExecution:nodeSelectorTerms:- matchExpressions:- key: kubernetes.io/osoperator: Invalues:- linuxhostNetwork: truepriorityClassName: system-node-criticaltolerations:- operator: Existseffect: NoScheduleserviceAccountName: flannelinitContainers:- name: install-cniimage: quay.io/coreos/flannel:v0.13.0command:- cpargs:- -f- /etc/kube-flannel/cni-conf.json- /etc/cni/net.d/10-flannel.conflistvolumeMounts:- name: cnimountPath: /etc/cni/net.d- name: flannel-cfgmountPath: /etc/kube-flannel/containers:- name: kube-flannelimage: quay.io/coreos/flannel:v0.13.0command:- /opt/bin/flanneldargs:- --ip-masq- --kube-subnet-mgrresources:requests:cpu: "100m"memory: "50Mi"limits:cpu: "100m"memory: "50Mi"securityContext:privileged: falsecapabilities:add: ["NET_ADMIN", "NET_RAW"]env:- name: POD_NAMEvalueFrom:fieldRef:fieldPath: metadata.name- name: POD_NAMESPACEvalueFrom:fieldRef:fieldPath: metadata.namespacevolumeMounts:- name: runmountPath: /run/flannel- name: flannel-cfgmountPath: /etc/kube-flannel/volumes:- name: runhostPath:path: /run/flannel- name: cnihostPath:path: /etc/cni/net.d- name: flannel-cfgconfigMap:name: kube-flannel-cfg kubectl apply -f kube-flannel.yml

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8.配置master節點可調度（默認master節點不可調度，即不可運行pod）

kubectl taint nodes --all node-role.kubernetes.io/master-

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總結

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