安装Kubernetes(k8s)保姆级教程---无坑版
一、安装环境说明
硬件要求
内存：2GB或更多RAM
CPU: 2核CPU或更多CPU
硬盘: 30GB或更多
本次环境说明：
操作系统：CentOS 7.9
内核版本：3.10.0-1160
master： 192.168.68.106
node01： 192.168.68.107
node02： 192.168.68.108
转载请在文章开头附上原文链接地址： https://www.cnblogs.com/Sunzz/p/15184167.html
二、环境准备
1.关闭防火墙和selinux
关闭防火墙
systemctl stop firewalld && systemctl disable firewalld && iptables -F
关闭selinux
sed -i 's/enforcing/disabled/' /etc/selinux/config && setenforce 0
2. 关闭swap分区
临时关闭
swapoff -a
永久关闭swap
sed -ri 's/.*swap.*/#&/' /etc/fstab
3.修改hosts文件
设置主机名(不设置也可以，但是要保证主机名不相同)
master上
hostnamectl set-hostname master.local
node01
hostnamectl set-hostname node01.local
node02
hostnamectl set-hostname node02.local
修改本地hosts文件
vi /etc/hosts 添加如下内容
192.168.68.106 master.local 192.168.68.107 node01.local 192.168.68.108 node02.local
4.修改内核参数
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 EOF sysctl --system
5.加载ip_vs内核模块
如果kube-proxy 模式为ip_vs则必须加载，本文采用iptables
modprobe ip_vs modprobe ip_vs_rr modprobe ip_vs_wrr modprobe ip_vs_sh modprobe nf_conntrack_ipv4
设置下次开机自动加载
cat > /etc/modules-load.d/ip_vs.conf << EOF ip_vs ip_vs_rr ip_vs_wrr ip_vs_sh nf_conntrack_ipv4 EOF
三、安装docker
1.配置yum源(这里使用阿里云的源)
yum install wget -y wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
2. 安装docker
yum install docker-ce docker-ce-cli -y
3.编辑docker配置文件
编辑/etc/docker/daemon.json
mkdir /etc/docker/ cat > /etc/docker/daemon.json << EOF { "registry-mirrors": ["https://gqs7xcfd.mirror.aliyuncs.com","https://hub-mirror.c.163.com"], "exec-opts": ["native.cgroupdriver=systemd"], "log-driver": "json-file", "log-opts": { "max-size": "100m" }, "storage-driver": "overlay2" } EOF
3.启动docker服务
systemctl daemon-reload && systemctl enable docker && systemctl start docker
4.安装指定版本的docker
列出所有docker版本
yum list docker-ce.x86_64 --showduplicates |sort
选择一个你想要的版本进行安装，这里安装docker 19.03.9版本
yum -y install docker-ce-19.03.9-3.el7 docker-ce-cli-19.03.9-3.el7
四、安装kubeadm,kubelet和kubectl
1.配置yum源(这里使用阿里云的源)
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=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
2.安装指定版本的kubeadm,kubelet,kubectl
yum install -y kubelet-1.18.8 kubeadm-1.18.8 kubectl-1.18.8
指定其他版本也可照做，只需指定相应的版本即可，比如安装 1.16.9
yum install -y kubelet-1.16.9 kubeadm-1.16.9 kubectl-1.16.9
由于不知道默认安装的最新版，国内的阿里云镜像站同步会有延迟，导致无法拉取镜像。如果你可以拉去到最新的镜像那请随意。
3.设置开机自启
systemctl enable kubelet
4.列出所有版本
yum list kubelet --showduplicates
五、部署Kubernetes Master节点
1.master节点初始化
kubeadm init \ --kubernetes-version 1.18.8 \ --apiserver-advertise-address=0.0.0.0 \ --service-cidr=10.96.0.0/16 \ --pod-network-cidr=10.245.0.0/16 \ --image-repository registry.aliyuncs.com/google_containers
参数说明
--kubernetes-version v1.18.8 指定版本
--apiserver-advertise-address 为通告给其它组件的IP，一般应为master节点的IP地址
--service-cidr 指定service网络，不能和node网络冲突
--pod-network-cidr 指定pod网络，不能和node网络、service网络冲突
--image-repository registry.aliyuncs.com/google_containers 指定镜像源，由于默认拉取镜像地址k8s.gcr.io国内无法访问，这里指定阿里云镜像仓库地址。
如果k8s版本比较新，可能阿里云没有对应的镜像，就需要自己从其它地方获取镜像了。
--control-plane-endpoint 标志应该被设置成负载均衡器的地址或 DNS 和端口(可选)
注意点：
版本必须和上边安装的kubelet,kubead,kubectl保持一致
2.等待拉取镜像
也可用自己提前给各个节点拉取镜像 ，查看所需镜像命令： kubeadm --kubernetes-version 1.18.8 config images list
等待镜像拉取成功后，会继续初始化集群，等到初始化完成后，会看到类似如下信息，保留最后两行的输出后边会用到
3. 配置kubectl
就是执行初始化成功后输出的那三条命令
mkdir -p $HOME/.kube cp -i /etc/kubernetes/admin.conf $HOME/.kube/config chown $(id -u):$(id -g) $HOME/.kube/config
4.查看节点信息
kubectl get nodes
此时只能看到master节点，等待其他节点加入进来后即可看到。
六、node节点加入集群
各个node节点也要进行 二三四步骤的操作，然后才能加入集群
1. node01 加入集群
kubeadm join 192.168.68.106:6443 --token 1quyaw.xa7yel3xla129kfw \ --discovery-token-ca-cert-hash sha256:470410e1180b119ebe8ee3ae2842e7a4a852e590896306ec0dab26b168d99197
2. node02进行相同的操作即可，这里不再赘述
3.master节点上查看集群节点
kubectl get nodes
可以看到 STATUS状态都是NotReady, 这是因为确实网络插件导致的，等安装好网络插件就好了
七、安装插件
1.安装 flannel
从官网下载yaml文件
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
也可从这里直接复制
--- apiVersion: policy/v1beta1 kind: PodSecurityPolicy metadata: name: psp.flannel.unprivileged annotations: seccomp.security.alpha.kubernetes.io/allowedProfileNames: docker/default seccomp.security.alpha.kubernetes.io/defaultProfileName: docker/default apparmor.security.beta.kubernetes.io/allowedProfileNames: runtime/default apparmor.security.beta.kubernetes.io/defaultProfileName: runtime/default spec: privileged: false volumes: - configMap - secret - emptyDir - hostPath allowedHostPaths: - pathPrefix: "/etc/cni/net.d" - pathPrefix: "/etc/kube-flannel" - pathPrefix: "/run/flannel" readOnlyRootFilesystem: false # Users and groups runAsUser: rule: RunAsAny supplementalGroups: rule: RunAsAny fsGroup: rule: RunAsAny # Privilege Escalation allowPrivilegeEscalation: false defaultAllowPrivilegeEscalation: false # Capabilities allowedCapabilities: ['NET_ADMIN', 'NET_RAW'] defaultAddCapabilities: [] requiredDropCapabilities: [] # Host namespaces hostPID: false hostIPC: false hostNetwork: true hostPorts: - min: 0 max: 65535 # SELinux seLinux: # SELinux is unused in CaaSP rule: '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: - pods verbs: - get - apiGroups: - "" resources: - nodes verbs: - list - watch - apiGroups: - "" resources: - nodes/status verbs: - patch --- kind: ClusterRoleBinding apiVersion: rbac.authorization.k8s.io/v1 metadata: name: flannel roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: flannel subjects: - kind: ServiceAccount name: flannel namespace: kube-system --- apiVersion: v1 kind: ServiceAccount metadata: name: flannel namespace: kube-system --- kind: ConfigMap apiVersion: v1 metadata: name: kube-flannel-cfg namespace: kube-system labels: tier: node app: 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": "10.245.0.0/16", "Backend": { "Type": "vxlan" } } --- apiVersion: apps/v1 kind: DaemonSet metadata: name: kube-flannel-ds namespace: kube-system labels: tier: node app: flannel spec: selector: matchLabels: app: flannel template: metadata: labels: tier: node app: flannel spec: affinity: nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: nodeSelectorTerms: - matchExpressions: - key: kubernetes.io/os operator: In values: - linux hostNetwork: true priorityClassName: system-node-critical tolerations: - operator: Exists effect: NoSchedule serviceAccountName: flannel initContainers: - name: install-cni image: quay.io/coreos/flannel:v0.14.0 command: - cp args: - -f - /etc/kube-flannel/cni-conf.json - /etc/cni/net.d/10-flannel.conflist volumeMounts: - name: cni mountPath: /etc/cni/net.d - name: flannel-cfg mountPath: /etc/kube-flannel/ containers: - name: kube-flannel image: quay.io/coreos/flannel:v0.14.0 command: - /opt/bin/flanneld args: - --ip-masq - --kube-subnet-mgr resources: requests: cpu: "100m" memory: "50Mi" limits: cpu: "100m" memory: "50Mi" securityContext: privileged: false capabilities: add: ["NET_ADMIN", "NET_RAW"] env: - name: POD_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: POD_NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace volumeMounts: - name: run mountPath: /run/flannel - name: flannel-cfg mountPath: /etc/kube-flannel/ volumes: - name: run hostPath: path: /run/flannel - name: cni hostPath: path: /etc/cni/net.d - name: flannel-cfg configMap: name: kube-flannel-cfg
更改 128行的网络配置，要和 pod-network-cidr保持一致
然后执行yaml文件
kubectl apply -f kube-flannel.yaml
2.查看flannel部署结果
kubectl -n kube-system get pods -o wide
3.查看各个node的状态
kubectl get nodes
4. 修改集群kube-proxy的模式为iptables
由于 k8s 1.18对内核版本要求比较高，3.10的内核部署1.18.8使用ipvs模式会存在coredns无法解析等问题。股在此采用iptables模式。 如果你服务内核4+起，则采用iptables 和ipvs均可。
kubectl get cm kube-proxy -n kube-system -o yaml | sed 's/mode: ""/mode: "iptables"/' | kubectl apply -f - kubectl -n kube-system rollout restart daemonsets.apps kube-proxy kubectl -n kube-system rollout restart daemonsets.apps kube-flannel-ds
升级内核可参考：https://www.cnblogs.com/Sunzz/p/15624582.html
八.部署busybox来测试集群各网络情况
busybox.yaml
--- apiVersion: apps/v1 kind: Deployment metadata: name: busybox spec: replicas: 2 selector: matchLabels: name: busybox template: metadata: labels: name: busybox spec: containers: - name: busybox image: busybox imagePullPolicy: IfNotPresent args: - /bin/sh - -c - sleep 1; touch /tmp/healthy; sleep 30000 readinessProbe: exec: command: - cat - /tmp/healthy initialDelaySeconds: 1
kubectl apply -f busybox.yaml
1.查看集群所有pod ip 和service ip
2.跨node的pods是否互通
kubectl exec -it busybox-7c84546778-h6t2d -- /bin/sh
10.245.2.6 为另一个busybox pod的ip
3. pod 和各node是否互通
在pod里面分别ping 各node的ip
4.pod 和service 的网络
5.测试core-dns是否正常
转载请在文章开头附上原文链接地址： https://www.cnblogs.com/Sunzz/p/15184167.html
九，部署metrics-server、nginx-ingress
1.部署nginx-ingress
apiVersion: v1 kind: Namespace metadata: name: nginx-ingress --- apiVersion: v1 kind: ServiceAccount metadata: name: nginx-ingress namespace: nginx-ingress --- apiVersion: v1 kind: Secret metadata: name: default-server-secret namespace: nginx-ingress type: Opaque data: tls.crt: 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 tls.key: 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 --- kind: ConfigMap apiVersion: v1 metadata: name: nginx-config namespace: nginx-ingress data: client-max-body-size: "0" server-names-hash-bucket-size: "1024" --- kind: ClusterRole apiVersion: rbac.authorization.k8s.io/v1beta1 metadata: name: nginx-ingress rules: - apiGroups: - "" resources: - services - endpoints verbs: - get - list - watch - apiGroups: - "" resources: - secrets verbs: - get - list - watch - apiGroups: - "" resources: - configmaps verbs: - get - list - watch - update - create - apiGroups: - "" resources: - pods verbs: - list - apiGroups: - "" resources: - events verbs: - create - patch - apiGroups: - extensions resources: - ingresses verbs: - list - watch - get - apiGroups: - "extensions" resources: - ingresses/status verbs: - update - apiGroups: - k8s.nginx.org resources: - virtualservers - virtualserverroutes verbs: - list - watch - get --- kind: ClusterRoleBinding apiVersion: rbac.authorization.k8s.io/v1beta1 metadata: name: nginx-ingress subjects: - kind: ServiceAccount name: nginx-ingress namespace: nginx-ingress roleRef: kind: ClusterRole name: nginx-ingress apiGroup: rbac.authorization.k8s.io --- apiVersion: apps/v1 kind: DaemonSet metadata: name: nginx-ingress namespace: nginx-ingress annotations: prometheus.io/scrape: "true" prometheus.io/port: "9113" spec: selector: matchLabels: app: nginx-ingress template: metadata: labels: app: nginx-ingress spec: serviceAccountName: nginx-ingress containers: - image: nginx/nginx-ingress:1.5.5 imagePullPolicy: IfNotPresent name: nginx-ingress ports: - name: http containerPort: 80 hostPort: 80 - name: https containerPort: 443 hostPort: 443 - name: prometheus containerPort: 9113 env: - name: POD_NAMESPACE valueFrom: fieldRef: fieldPath: metadata.namespace - name: POD_NAME valueFrom: fieldRef: fieldPath: metadata.name args: - -nginx-configmaps=$(POD_NAMESPACE)/nginx-config - -default-server-tls-secret=$(POD_NAMESPACE)/default-server-secret - -enable-prometheus-metrics
kubectl apply -f nginx-ingress.yaml
2.部署metrics-server
apiVersion: v1 kind: ServiceAccount metadata: labels: k8s-app: metrics-server name: metrics-server namespace: kube-system --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: labels: k8s-app: metrics-server rbac.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.io resources: - pods - nodes verbs: - get - list - watch --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: labels: k8s-app: metrics-server name: system:metrics-server rules: - apiGroups: - "" resources: - pods - nodes - nodes/stats - namespaces - configmaps verbs: - get - list - watch --- apiVersion: rbac.authorization.k8s.io/v1 kind: RoleBinding metadata: labels: k8s-app: metrics-server name: metrics-server-auth-reader namespace: kube-system roleRef: apiGroup: rbac.authorization.k8s.io kind: Role name: extension-apiserver-authentication-reader subjects: - kind: ServiceAccount name: metrics-server namespace: kube-system --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: labels: k8s-app: metrics-server name: metrics-server:system:auth-delegator roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:auth-delegator subjects: - kind: ServiceAccount name: metrics-server namespace: kube-system --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: labels: k8s-app: metrics-server name: system:metrics-server roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:metrics-server subjects: - kind: ServiceAccount name: metrics-server namespace: kube-system --- apiVersion: v1 kind: Service metadata: labels: k8s-app: metrics-server name: metrics-server namespace: kube-system spec: ports: - name: https port: 443 protocol: TCP targetPort: https selector: k8s-app: metrics-server --- apiVersion: apps/v1 kind: Deployment metadata: labels: k8s-app: metrics-server name: metrics-server namespace: kube-system spec: replicas: 1 selector: matchLabels: k8s-app: metrics-server strategy: rollingUpdate: maxUnavailable: 0 template: metadata: labels: k8s-app: metrics-server spec: containers: - args: - --cert-dir=/tmp - --secure-port=443 - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname - --kubelet-use-node-status-port - --metric-resolution=15s # 跳过tls,解决cannot validate certificate for 192.168.65.3 because it doesn’t contain any IP SANs报错 - --kubelet-insecure-tls image: k8s.gcr.io/metrics-server/metrics-server:v0.5.0 imagePullPolicy: IfNotPresent livenessProbe: failureThreshold: 3 httpGet: path: /livez port: https scheme: HTTPS periodSeconds: 10 name: metrics-server ports: - containerPort: 443 name: https protocol: TCP readinessProbe: failureThreshold: 3 httpGet: path: /readyz port: https scheme: HTTPS initialDelaySeconds: 20 periodSeconds: 10 resources: requests: cpu: 100m memory: 200Mi securityContext: readOnlyRootFilesystem: true runAsNonRoot: true runAsUser: 1000 volumeMounts: - mountPath: /tmp name: tmp-dir - mountPath: /etc/localtime name: host-time nodeSelector: kubernetes.io/os: linux priorityClassName: system-cluster-critical serviceAccountName: metrics-server volumes: - emptyDir: {} name: tmp-dir - name: host-time hostPath: path: /etc/localtime --- apiVersion: apiregistration.k8s.io/v1 kind: APIService metadata: labels: k8s-app: metrics-server name: v1beta1.metrics.k8s.io spec: group: metrics.k8s.io groupPriorityMinimum: 100 insecureSkipTLSVerify: true service: name: metrics-server namespace: kube-system version: v1beta1 versionPriority: 100
kubectl apply -f metrics-server.yaml
