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入门K8s：一键脚本搭建Linux服务器集群

發布時間：2023/12/4 linux 19 豆豆

生活随笔收集整理的這篇文章主要介紹了入门K8s：一键脚本搭建Linux服务器集群小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

前言

好久沒有寫系列博客了，本文主要是對網上文章的總結篇，主要是將安裝和運行代碼做了一次真機實驗，親測可用。文章內包含的腳本和代碼，多來自于網絡，也有我自己的調整和配置，文章末尾對參考的文獻做了列舉，方便大家參考。

過程很簡單，一路next往下看和操作即可，文章不對腳本和代碼做原理解釋，某些注意點加了紅色標注，部分腳本有注釋，可以自行參考，以后有機會可以視頻講解。

核心步驟

因為是next的方式，所以本章節主要是操作步驟，步驟中涉及到的代碼或者腳本，可以在下文中找到，比如：附錄代碼一、附錄代碼二等等，因為腳本實在太長，不太方便放到步驟里。

1、配置 node01 主節點（2個文件）

在root目錄下拷貝k8s腳本（附錄代碼一：kubernetes_node01.sh）和flannel網絡（附錄代碼二：kube-flannel.yml）的文件；

然后給腳本文件賦權限：chmod +x kubernetes_node01.sh

最后執行腳本：./kubernetes_node01.sh

ps：1、sh腳本中，需要配置節點，是內網的。

2、多個節點之間要保證能ping通；

3、中間可能需要自己來配合做些操作，比如輸入：y，來做確認等等。

最后，可以在當前文件夾下，看到一個key.txt的文件，里邊有安裝的結果數據或者密鑰等，可查看附錄代碼三：key.txt，這是我安裝的結果，里邊有join主節點的配置語句。

查看所有的nodes和pods：

[root@node01 ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION node01???Ready????master???26h???v1.18.0

所有的pods：

[root@node01 ~]# kubectl get pods -A NAMESPACE NAME READY STATUS RESTARTS AGE kube-system coredns-7ff77c879f-6m6fl 1/1 Running 0 25m kube-system coredns-7ff77c879f-dkd56 1/1 Running 0 25m kube-system etcd-node01 1/1 Running 0 26m kube-system kube-apiserver-node01 1/1 Running 0 26m kube-system kube-controller-manager-node01 1/1 Running 0 26m kube-system kube-flannel-ds-amd64-sdv2h 1/1 Running 0 25m kube-system kube-proxy-vgf4r 1/1 Running 0 25m kube-system kube-scheduler-node01 1/1 Running 0 26m

?如果都啟動，都READY了，表示安裝成功。

2、配置dashboard儀表盤（2個文件）

上面安裝好了kubectl、kubeadm、kubelet后，我們可以通過客戶端來連接，這里安利下k8s的客戶端：Lens，很香。

如果不用客戶端，那就需要安裝儀表盤了。

1、Linux根目錄拷貝文件，附錄代碼四：recommended.yaml（安裝看板），附錄代碼五：dashboard-svc-account.yaml（配置管理員賬戶）

2、執行命令：

sed -i '/targetPort: 8443/a\ \ \ \ \ \ nodePort: 30001\n\ \ type: NodePort' recommended.yaml

3、啟動儀表盤服務：

kubectl apply -f recommended.yaml

4、啟動配置賬戶：

kubectl apply -f dashboard-svc-account.yaml

都成功后，會生成一個token字符串，用來登錄web端的令牌的，如果沒有拷貝或者丟失了也不怕，可以使用命令查看：

kubectl describe secrets -n kube-system `kubectl get secret -n kube-system | grep admin | awk '{print $1}'` | grep '^token'|awk '{print $2}'

?token就是類似這種：

eyJhbGciOiJSUzI1NiIsImtpZCI6Ikl5SE00cXFZR1V2cWstQURVcGlUOGk4cTBY ekZMV0VmNDEwRy14UTd1d2sifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2N vdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrd WJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5 hbWUiOiJkYXNoYm9hcmQtYWRtaW4tdG9rZW4tY3JnejYiLCJrdWJlcm5ldGVzLmlvL 3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC5uYW1lIjoiZGFzaGJvYXJkLWF kbWliwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQ udWlkIjoiMjYwMGQ0ZjctM2ZhOS00ODIwLWFmMmUtZTJlZDMxYWMyYWFhIiwic3ViI joic3lzdGVtOnNlcnZpY2VhY2NvdW50Omt1YmUtc3lzdGVtOmRhc2hib2FyZC1hZG1 pbiJ9.BBtdG-S2kHEwRbWIAf6DiUgC3ILUOStPATyWfvxcQs5VJBtLRyMGqQ-AfkUo VLuhZdUv-CGoEJ1OYA00M6MwoehDdkhLFbXF7Xx1IPyhFTHxZ_oXHBPyjEREkTEera rZnvgt0ufU4g_Eqn91jdHet73itz-0abgmLMPkRl5YYjlh36Ivwq9IjKgujLwTNisU FckLuHOscHtQIrjIvAZlWTRh_awMsDHvemAKG_YIjMbyQnXi6VfN3rTW869DA0XAGO F2t7cWBtMmHvmLxVYqpOauUzwXXeYbO9eP0_d9JtVwKv6R0Q7sexRFZ-iTdZBOJDuj FI3UT2jsqgVdbagA

這里再檢查下：

查看所有的nodes和pods：

?多了kubernetes-dashboard命名空間下的兩個pod。

3、配置 node02 子節點（1個文件）

如果你沒有多余的服務器，也可以在master節點做自己的pod的，需要開啟下，命令將 master 標記為可調度：

sudo kubectl taint nodes --all node-role.kubernetes.io/masteflr-

如果要配置多個子節點，那就仿照主節點來繼續寫sh腳本吧（附錄代碼六：kubernetes_node02.sh），步驟和主節點一致：

1、拷貝到子節點服務器；

2、賦權限，執行文件：./kubernetes_node02.sh

3、這里不用flannel配置；

4、安裝完成后，可以join到主節點，配置文件在主節點的key.txt文件里，如果你安裝成功了的話；

kubeadm join 172.17.10.4:6443 --token q3uu1o.4rdfkcyzxjhawvk1 \--discovery-token-ca-cert-hash sha256:a755d8f56733ba8f9d1951298b200202fce7b84389954bf7a38558fa6ce2a9c9

如果一切正常，可以去主節點查看所有的nodes：

NAME STATUS ROLES AGE VERSION node01 Ready master 26h v1.18.0 node02 Ready <none> 25h v1.18.0

表示我們的子節點已經配置完成。

4、配置ASP.Net Core服務

這里的Deployment+Service的寫法比較簡單，直接貼出來，就不做過多的解釋了。

apiVersion: apps/v1 kind: Deployment metadata:labels:app: laozhang-op2name: laozhang-op2 spec:selector:matchLabels:app: laozhang-op2replicas: 2template:metadata:labels:app: laozhang-op2spec:containers:- name: laozhang-op2image: laozhangisphi/apkimg315imagePullPolicy: IfNotPresent #pull鏡像時機，---- apiVersion: v1 kind: Service metadata:name: laozhang-op2 spec:type: NodePortports:- name: defaultprotocol: TCPport: 80targetPort: 80nodePort: 30099 selector:app: laozhang-op2

?但是這種是nodePort的方式，平時使用更多的是Ingress的方式，那使用ingress，就先需要配置ingress的服務。

5、配置Ingress-nginx（1個文件）

在根目錄拷貝文件，附錄代碼七：mandatory.yaml，配置Ingress-Nginx服務，

這里需要注意下，如果服務器之前已經配置過nginx，需要在mandatory.yaml文件中，修改http-port輸出端口，詳細內容見下面的代碼，有注釋。

直接執行yaml：

kubectl apply -f mandatory.yaml

如果沒有報錯，可以查看所有的pods：

[root@node01 ~]# kubectl get pods -A NAMESPACE NAME READY STATUS RESTARTS AGE default laozhang-op2-5cf487b57f-pdvfg 1/1 Running 0 4h29m default laozhang-op2-5cf487b57f-vtgwc 1/1 Running 0 4h29m ingress-nginx nginx-ingress-controller-557475687f-rfl98 1/1 Running 0 122m kube-system coredns-7ff77c879f-gj4sl 1/1 Running 0 26h kube-system coredns-7ff77c879f-mqp2q 1/1 Running 0 26h kube-system etcd-node01 1/1 Running 0 26h kube-system kube-apiserver-node01 1/1 Running 0 26h kube-system kube-controller-manager-node01 1/1 Running 0 26h kube-system kube-flannel-ds-amd64-nmnj2 1/1 Running 0 26h kube-system kube-proxy-wcjb8 1/1 Running 0 26h kube-system kube-scheduler-node01 1/1 Running 2 26h kubernetes-dashboard dashboard-metrics-scraper-78f5d9f487-qp2fw 1/1 Running 0 26h kubernetes-dashboard kubernetes-dashboard-577bd97bc-2tsj7 1/1 Running 0 26h

?如果和上面一樣，那恭喜，一切配置就完成了。

附錄代碼一：kubernetes_node01.sh

#!/bin/bash ############## ##主節點## ################## 第一部分，環境初始化 #### #k8s版本 version=v1.18.0 kubelet=kubelet-1.18.0-0.x86_64 kubeadm=kubeadm-1.18.0-0.x86_64 kubectl=kubectl-1.18.0-0.x86_64 #集群加入方式 key=/root/key.txt #部署flannel網絡 flannel=/root/kube-flannel.yml #安裝必要依賴 yum -y install vim wget git cmake make gcc gcc-c++ net-tools lrzsz#### 第二部分，節點配置 #### #主機解析，免密登錄 #內網ip，配置多節點，也可以不配置，后期通過join的方式 node01=172.21.10.4 #node02=192.168.10.7 #node03=192.168.1.30 hostnamectl set-hostname node01 echo '172.21.10.4 node01 #192.168.10.7 node02 #192.168.1.30 node03' >> /etc/hosts ssh-keygen ssh-copy-id -i $node01 #ssh-copy-id -i $node02 #ssh-copy-id -i $node03 #scp /etc/hosts node02:/etc/hosts #scp /etc/hosts node03:/etc/hosts #關閉防火墻 systemctl stop firewalld systemctl disable firewalld #swap分區關閉 swapoff -a sed -i 's/.*swap.*/#&/' /etc/fstab #關閉沙盒 setenforce 0 sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/sysconfig/selinux sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config sed -i "s/^SELINUX=permissive/SELINUX=disabled/g" /etc/sysconfig/selinux sed -i "s/^SELINUX=permissive/SELINUX=disabled/g" /etc/selinux/config #打開ipv6 modprobe br_netfilter modprobe ip_vs_rr cat <<EOF > /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 vm.swappiness = 0 EOF sysctl -p /etc/sysctl.d/k8s.conf ls /proc/sys/net/bridge#### 第三部分，參數/源處理 #### #安裝epel源 yum install -y epel-release yum install -y yum-utils device-mapper-persistent-data lvm2 net-tools conntrack-tools wget vim ntpdate libseccomp libtool-ltdl #時區校準 systemctl enable ntpdate.service echo '*/30 * * * * /usr/sbin/ntpdate time7.aliyun.com >/dev/null 2>&1' > /tmp/crontab2.tmp crontab /tmp/crontab2.tmp systemctl start ntpdate.service #添加參數 echo "* soft nofile 65536" >> /etc/security/limits.conf echo "* hard nofile 65536" >> /etc/security/limits.conf echo "* soft nproc 65536" >> /etc/security/limits.conf echo "* hard nproc 65536" >> /etc/security/limits.conf echo "* soft memlock unlimited" >> /etc/security/limits.conf echo "* hard memlock unlimited" >> /etc/security/limits.conf #添加kubernetes的epel源 echo '[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' > /etc/yum.repos.d/kubernetes.repo #下載 sudo yum-config-manager \--add-repo \https://mirrors.ustc.edu.cn/docker-ce/linux/centos/docker-ce.repo yum makecache fast#### 第四部分，開始安裝 #### yum -y install docker-ce yum install --enablerepo="kubernetes" $kubelet $kubeadm $kubectl systemctl enable kubelet.service && systemctl start kubelet.service systemctl start docker.service && systemctl enable docker.service #安裝tab快捷鍵 yum -y install bash-completion && source /usr/share/bash-completion/bash_completion && source <(kubectl completion bash) && echo "source <(kubectl completion bash)" >> ~/.bashrc #創建集群 kubeadm init --apiserver-advertise-address $node01 --image-repository registry.aliyuncs.com/google_containers --kubernetes-version $version --pod-network-cidr=10.244.0.0/16 >> $key 2>&1 export KUBECONFIG=/etc/kubernetes/admin.conf mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config docker pull quay.io/coreos/flannel:v0.12.0-amd64 kubectl apply -f $flannel echo '請手動查看$key文件的密鑰將其他節點接入集群'

附錄代碼二：kube-flannel.yml

############## ##flannel網絡## ############## --- 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']defaultAddCapabilities: []requiredDropCapabilities: []# Host namespaceshostPID: falsehostIPC: falsehostNetwork: truehostPorts:- min: 0max: 65535# SELinuxseLinux:# SELinux is unused in CaaSPrule: 'RunAsAny' --- kind: ClusterRole apiVersion: rbac.authorization.k8s.io/v1beta1 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/v1beta1 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-ds-amd64namespace: 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:- linux- key: kubernetes.io/archoperator: Invalues:- amd64hostNetwork: truetolerations:- operator: Existseffect: NoScheduleserviceAccountName: flannelinitContainers:- name: install-cniimage: quay.io/coreos/flannel:v0.12.0-amd64command:- 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:v0.12.0-amd64command:- /opt/bin/flanneldargs:- --ip-masq- --kube-subnet-mgrresources:requests:cpu: "100m"memory: "50Mi"limits:cpu: "100m"memory: "50Mi"securityContext:privileged: falsecapabilities:add: ["NET_ADMIN"]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 --- apiVersion: apps/v1 kind: DaemonSet metadata:name: kube-flannel-ds-arm64namespace: 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:- linux- key: kubernetes.io/archoperator: Invalues:- arm64hostNetwork: truetolerations:- operator: Existseffect: NoScheduleserviceAccountName: flannelinitContainers:- name: install-cniimage: quay.io/coreos/flannel:v0.12.0-arm64command:- 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:v0.12.0-arm64command:- /opt/bin/flanneldargs:- --ip-masq- --kube-subnet-mgrresources:requests:cpu: "100m"memory: "50Mi"limits:cpu: "100m"memory: "50Mi"securityContext:privileged: falsecapabilities:add: ["NET_ADMIN"]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 --- apiVersion: apps/v1 kind: DaemonSet metadata:name: kube-flannel-ds-armnamespace: 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:- linux- key: kubernetes.io/archoperator: Invalues:- armhostNetwork: truetolerations:- operator: Existseffect: NoScheduleserviceAccountName: flannelinitContainers:- name: install-cniimage: quay.io/coreos/flannel:v0.12.0-armcommand:- 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:v0.12.0-armcommand:- /opt/bin/flanneldargs:- --ip-masq- --kube-subnet-mgrresources:requests:cpu: "100m"memory: "50Mi"limits:cpu: "100m"memory: "50Mi"securityContext:privileged: falsecapabilities:add: ["NET_ADMIN"]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 --- apiVersion: apps/v1 kind: DaemonSet metadata:name: kube-flannel-ds-ppc64lenamespace: 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:- linux- key: kubernetes.io/archoperator: Invalues:- ppc64lehostNetwork: truetolerations:- operator: Existseffect: NoScheduleserviceAccountName: flannelinitContainers:- name: install-cniimage: quay.io/coreos/flannel:v0.12.0-ppc64lecommand:- 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:v0.12.0-ppc64lecommand:- /opt/bin/flanneldargs:- --ip-masq- --kube-subnet-mgrresources:requests:cpu: "100m"memory: "50Mi"limits:cpu: "100m"memory: "50Mi"securityContext:privileged: falsecapabilities:add: ["NET_ADMIN"]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 --- apiVersion: apps/v1 kind: DaemonSet metadata:name: kube-flannel-ds-s390xnamespace: 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:- linux- key: kubernetes.io/archoperator: Invalues:- s390xhostNetwork: truetolerations:- operator: Existseffect: NoScheduleserviceAccountName: flannelinitContainers:- name: install-cniimage: quay.io/coreos/flannel:v0.12.0-s390xcommand:- 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:v0.12.0-s390xcommand:- /opt/bin/flanneldargs:- --ip-masq- --kube-subnet-mgrresources:requests:cpu: "100m"memory: "50Mi"limits:cpu: "100m"memory: "50Mi"securityContext:privileged: falsecapabilities:add: ["NET_ADMIN"]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

附錄代碼三：key.txt

W0526 16:17:20.680490 13760 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io] [init] Using Kubernetes version: v1.18.0 [preflight] Running pre-flight checks[WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/ [preflight] Pulling images required for setting up a Kubernetes cluster [preflight] This might take a minute or two, depending on the speed of your internet connection [preflight] You can also perform this action in beforehand using 'kubeadm config images pull' [kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env" [kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml" [kubelet-start] Starting the kubelet [certs] Using certificateDir folder "/etc/kubernetes/pki" [certs] Generating "ca" certificate and key [certs] Generating "apiserver" certificate and key [certs] apiserver serving cert is signed for DNS names [node01 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 172.17.10.4] [certs] Generating "apiserver-kubelet-client" certificate and key [certs] Generating "front-proxy-ca" certificate and key [certs] Generating "front-proxy-client" certificate and key [certs] Generating "etcd/ca" certificate and key [certs] Generating "etcd/server" certificate and key [certs] etcd/server serving cert is signed for DNS names [node01 localhost] and IPs [172.17.10.4 127.0.0.1 ::1] [certs] Generating "etcd/peer" certificate and key [certs] etcd/peer serving cert is signed for DNS names [node01 localhost] and IPs [172.17.10.4 127.0.0.1 ::1] [certs] Generating "etcd/healthcheck-client" certificate and key [certs] Generating "apiserver-etcd-client" certificate and key [certs] Generating "sa" key and public key [kubeconfig] Using kubeconfig folder "/etc/kubernetes" [kubeconfig] Writing "admin.conf" kubeconfig file [kubeconfig] Writing "kubelet.conf" kubeconfig file [kubeconfig] Writing "controller-manager.conf" kubeconfig file [kubeconfig] Writing "scheduler.conf" kubeconfig file [control-plane] Using manifest folder "/etc/kubernetes/manifests" [control-plane] Creating static Pod manifest for "kube-apiserver" [control-plane] Creating static Pod manifest for "kube-controller-manager" W0526 16:18:02.560249 13760 manifests.go:225] the default kube-apiserver authorization-mode is "Node,RBAC"; using "Node,RBAC" [control-plane] Creating static Pod manifest for "kube-scheduler" W0526 16:18:02.561130 13760 manifests.go:225] the default kube-apiserver authorization-mode is "Node,RBAC"; using "Node,RBAC" [etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests" [wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s [apiclient] All control plane components are healthy after 26.504466 seconds [upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace [kubelet] Creating a ConfigMap "kubelet-config-1.18" in namespace kube-system with the configuration for the kubelets in the cluster [upload-certs] Skipping phase. Please see --upload-certs [mark-control-plane] Marking the node node01 as control-plane by adding the label "node-role.kubernetes.io/master=''" [mark-control-plane] Marking the node node01 as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule] [bootstrap-token] Using token: q3uu1o.4rdfkcyzxjhawvk1 [bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles [bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to get nodes [bootstrap-token] configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials [bootstrap-token] configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token [bootstrap-token] configured RBAC rules to allow certificate rotation for all node client certificates in the cluster [bootstrap-token] Creating the "cluster-info" ConfigMap in the "kube-public" namespace [kubelet-finalize] Updating "/etc/kubernetes/kubelet.conf" to point to a rotatable kubelet client certificate and key [addons] Applied essential addon: CoreDNS [addons] Applied essential addon: kube-proxyYour 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/configYou 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 172.17.10.4:6443 --token q3uu1o.4rdfkcyzxjhawvk1 \--discovery-token-ca-cert-hash sha256:a755d8f56733ba8f9d1951298b200202fce7b84389954bf7a38558fa6ce2a9c9

附錄代碼四：recommended.yaml

# Copyright 2017 The Kubernetes Authors. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License.############## ##安裝dashboard## ##############apiVersion: v1 kind: Namespace metadata:name: kubernetes-dashboard---apiVersion: v1 kind: ServiceAccount metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kubernetes-dashboard---kind: Service apiVersion: v1 metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kubernetes-dashboard spec:ports:- port: 443targetPort: 8443selector:k8s-app: kubernetes-dashboard---apiVersion: v1 kind: Secret metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard-certsnamespace: kubernetes-dashboard type: Opaque---apiVersion: v1 kind: Secret metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard-csrfnamespace: kubernetes-dashboard type: Opaque data:csrf: ""---apiVersion: v1 kind: Secret metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard-key-holdernamespace: kubernetes-dashboard type: Opaque---kind: ConfigMap apiVersion: v1 metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard-settingsnamespace: kubernetes-dashboard---kind: Role apiVersion: rbac.authorization.k8s.io/v1 metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kubernetes-dashboard rules:# Allow Dashboard to get, update and delete Dashboard exclusive secrets.- apiGroups: [""]resources: ["secrets"]resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs", "kubernetes-dashboard-csrf"]verbs: ["get", "update", "delete"]# Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map.- apiGroups: [""]resources: ["configmaps"]resourceNames: ["kubernetes-dashboard-settings"]verbs: ["get", "update"]# Allow Dashboard to get metrics.- apiGroups: [""]resources: ["services"]resourceNames: ["heapster", "dashboard-metrics-scraper"]verbs: ["proxy"]- apiGroups: [""]resources: ["services/proxy"]resourceNames: ["heapster", "http:heapster:", "https:heapster:", "dashboard-metrics-scraper", "http:dashboard-metrics-scraper"]verbs: ["get"]---kind: ClusterRole apiVersion: rbac.authorization.k8s.io/v1 metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboard rules:# Allow Metrics Scraper to get metrics from the Metrics server- apiGroups: ["metrics.k8s.io"]resources: ["pods", "nodes"]verbs: ["get", "list", "watch"]---apiVersion: rbac.authorization.k8s.io/v1 kind: RoleBinding metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kubernetes-dashboard roleRef:apiGroup: rbac.authorization.k8s.iokind: Rolename: kubernetes-dashboard subjects:- kind: ServiceAccountname: kubernetes-dashboardnamespace: kubernetes-dashboard---apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata:name: kubernetes-dashboard roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: kubernetes-dashboard subjects:- kind: ServiceAccountname: kubernetes-dashboardnamespace: kubernetes-dashboard---kind: Deployment apiVersion: apps/v1 metadata:labels:k8s-app: kubernetes-dashboardname: kubernetes-dashboardnamespace: kubernetes-dashboard spec:replicas: 1revisionHistoryLimit: 10selector:matchLabels:k8s-app: kubernetes-dashboardtemplate:metadata:labels:k8s-app: kubernetes-dashboardspec:containers:- name: kubernetes-dashboardimage: kubernetesui/dashboard:v2.2.0imagePullPolicy: Alwaysports:- containerPort: 8443protocol: TCPargs:- --auto-generate-certificates- --namespace=kubernetes-dashboard# Uncomment the following line to manually specify Kubernetes API server Host# If not specified, Dashboard will attempt to auto discover the API server and connect# to it. Uncomment only if the default does not work.# - --apiserver-host=http://my-address:portvolumeMounts:- name: kubernetes-dashboard-certsmountPath: /certs# Create on-disk volume to store exec logs- mountPath: /tmpname: tmp-volumelivenessProbe:httpGet:scheme: HTTPSpath: /port: 8443initialDelaySeconds: 30timeoutSeconds: 30securityContext:allowPrivilegeEscalation: falsereadOnlyRootFilesystem: truerunAsUser: 1001runAsGroup: 2001volumes:- name: kubernetes-dashboard-certssecret:secretName: kubernetes-dashboard-certs- name: tmp-volumeemptyDir: {}serviceAccountName: kubernetes-dashboardnodeSelector:"kubernetes.io/os": linux# Comment the following tolerations if Dashboard must not be deployed on mastertolerations:- key: node-role.kubernetes.io/mastereffect: NoSchedule---kind: Service apiVersion: v1 metadata:labels:k8s-app: dashboard-metrics-scrapername: dashboard-metrics-scrapernamespace: kubernetes-dashboard spec:ports:- port: 8000targetPort: 8000selector:k8s-app: dashboard-metrics-scraper---kind: Deployment apiVersion: apps/v1 metadata:labels:k8s-app: dashboard-metrics-scrapername: dashboard-metrics-scrapernamespace: kubernetes-dashboard spec:replicas: 1revisionHistoryLimit: 10selector:matchLabels:k8s-app: dashboard-metrics-scrapertemplate:metadata:labels:k8s-app: dashboard-metrics-scraperannotations:seccomp.security.alpha.kubernetes.io/pod: 'runtime/default'spec:containers:- name: dashboard-metrics-scraperimage: kubernetesui/metrics-scraper:v1.0.6ports:- containerPort: 8000protocol: TCPlivenessProbe:httpGet:scheme: HTTPpath: /port: 8000initialDelaySeconds: 30timeoutSeconds: 30volumeMounts:- mountPath: /tmpname: tmp-volumesecurityContext:allowPrivilegeEscalation: falsereadOnlyRootFilesystem: truerunAsUser: 1001runAsGroup: 2001serviceAccountName: kubernetes-dashboardnodeSelector:"kubernetes.io/os": linux# Comment the following tolerations if Dashboard must not be deployed on mastertolerations:- key: node-role.kubernetes.io/mastereffect: NoSchedulevolumes:- name: tmp-volumeemptyDir: {}

附錄代碼五：dashboard-svc-account.yaml

############## ##配置dashboard管理員賬號## ##############apiVersion: v1 kind: ServiceAccount metadata:name: dashboard-adminnamespace: kube-system --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata:name: dashboard-admin roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: cluster-admin subjects:- kind: ServiceAccountname: dashboard-adminnamespace: kube-system

附錄代碼六：kubernetes_node02.sh

#!/bin/bash ############## ##子節點## ################## 第一部分，環境初始化 #### #k8s版本 version=v1.18.0 kubelet=kubelet-1.18.0-0.x86_64 kubeadm=kubeadm-1.18.0-0.x86_64 kubectl=kubectl-1.18.0-0.x86_64#集群加入方式 key=/root/key.txt #部署flannel網絡 flannel=/root/kube-flannel.yml #安裝必要依賴 yum -y install vim wget git cmake make gcc gcc-c++ net-tools lrzsz#### 第二部分，節點配置 #### #配置節點，主機解析，免密登錄 node01=172.17.10.4 node02=172.17.10.7 # node03=192.168.1.30 hostnamectl set-hostname node02 echo '172.17.10.4 node01 172.17.10.7 node02' >> /etc/hosts ssh-keygen ssh-copy-id -i $node01 ssh-copy-id -i $node02 # ssh-copy-id -i $node03 scp /etc/hosts node02:/etc/hosts # scp /etc/hosts node03:/etc/hosts#關閉防火墻 systemctl stop firewalld systemctl disable firewalld #swap分區關閉 swapoff -a sed -i 's/.*swap.*/#&/' /etc/fstab #關閉沙盒 setenforce 0 sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/sysconfig/selinux sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config sed -i "s/^SELINUX=permissive/SELINUX=disabled/g" /etc/sysconfig/selinux sed -i "s/^SELINUX=permissive/SELINUX=disabled/g" /etc/selinux/config #打開ipv6 modprobe br_netfilter modprobe ip_vs_rr cat <<EOF > /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 vm.swappiness = 0 EOF sysctl -p /etc/sysctl.d/k8s.conf ls /proc/sys/net/bridge#### 第三部分，參數/源處理 #### #安裝epel源 yum install -y epel-release yum install -y yum-utils device-mapper-persistent-data lvm2 net-tools conntrack-tools wget vim ntpdate libseccomp libtool-ltdl #時區校準 systemctl enable ntpdate.service echo '*/30 * * * * /usr/sbin/ntpdate time7.aliyun.com >/dev/null 2>&1' > /tmp/crontab2.tmp crontab /tmp/crontab2.tmp systemctl start ntpdate.service #添加參數 echo "* soft nofile 65536" >> /etc/security/limits.conf echo "* hard nofile 65536" >> /etc/security/limits.conf echo "* soft nproc 65536" >> /etc/security/limits.conf echo "* hard nproc 65536" >> /etc/security/limits.conf echo "* soft memlock unlimited" >> /etc/security/limits.conf echo "* hard memlock unlimited" >> /etc/security/limits.conf #添加kubernetes的epel源 echo '[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' > /etc/yum.repos.d/kubernetes.repo #下載 sudo yum-config-manager \--add-repo \https://mirrors.ustc.edu.cn/docker-ce/linux/centos/docker-ce.repo yum makecache fast#### 第四部分，開始安裝 #### yum -y install docker-ce yum install --enablerepo="kubernetes" $kubelet $kubeadm $kubectl systemctl enable kubelet.service && systemctl start kubelet.service systemctl start docker.service && systemctl enable docker.service #安裝tab快捷鍵 yum -y install bash-completion && source /usr/share/bash-completion/bash_completion && source <(kubectl completion bash) && echo "source <(kubectl completion bash)" >> ~/.bashrc #創建集群 docker pull quay.io/coreos/flannel:v0.12.0-amd64 echo '請手動查看主節點$key文件的密鑰將其他節點接入集群'

附錄代碼七：mandatory.yaml

############## ##配置ingress-nginx服務## ############## apiVersion: v1 kind: Namespace metadata:name: ingress-nginxlabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx---kind: ConfigMap apiVersion: v1 metadata:name: nginx-configurationnamespace: ingress-nginxlabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx--- kind: ConfigMap apiVersion: v1 metadata:name: tcp-servicesnamespace: ingress-nginxlabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx--- kind: ConfigMap apiVersion: v1 metadata:name: udp-servicesnamespace: ingress-nginxlabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx--- apiVersion: v1 kind: ServiceAccount metadata:name: nginx-ingress-serviceaccountnamespace: ingress-nginxlabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx--- apiVersion: rbac.authorization.k8s.io/v1beta1 kind: ClusterRole metadata:name: nginx-ingress-clusterrolelabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx rules:- apiGroups:- ""resources:- configmaps- endpoints- nodes- pods- secretsverbs:- list- watch- apiGroups:- ""resources:- nodesverbs:- get- apiGroups:- ""resources:- servicesverbs:- get- list- watch- apiGroups:- ""resources:- eventsverbs:- create- patch- apiGroups:- "extensions"- "networking.k8s.io"resources:- ingressesverbs:- get- list- watch- apiGroups:- "extensions"- "networking.k8s.io"resources:- ingresses/statusverbs:- update--- apiVersion: rbac.authorization.k8s.io/v1beta1 kind: Role metadata:name: nginx-ingress-rolenamespace: ingress-nginxlabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx rules:- apiGroups:- ""resources:- configmaps- pods- secrets- namespacesverbs:- get- apiGroups:- ""resources:- configmapsresourceNames:# Defaults to "<election-id>-<ingress-class>"# Here: "<ingress-controller-leader>-<nginx>"# This has to be adapted if you change either parameter# when launching the nginx-ingress-controller.- "ingress-controller-leader-nginx"verbs:- get- update- apiGroups:- ""resources:- configmapsverbs:- create- apiGroups:- ""resources:- endpointsverbs:- get--- apiVersion: rbac.authorization.k8s.io/v1beta1 kind: RoleBinding metadata:name: nginx-ingress-role-nisa-bindingnamespace: ingress-nginxlabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx roleRef:apiGroup: rbac.authorization.k8s.iokind: Rolename: nginx-ingress-role subjects:- kind: ServiceAccountname: nginx-ingress-serviceaccountnamespace: ingress-nginx--- apiVersion: rbac.authorization.k8s.io/v1beta1 kind: ClusterRoleBinding metadata:name: nginx-ingress-clusterrole-nisa-bindinglabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx roleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: nginx-ingress-clusterrole subjects:- kind: ServiceAccountname: nginx-ingress-serviceaccountnamespace: ingress-nginx---apiVersion: apps/v1 kind: Deployment metadata:name: nginx-ingress-controllernamespace: ingress-nginxlabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx spec:replicas: 1selector:matchLabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginxtemplate:metadata:labels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginxannotations:prometheus.io/port: "10254"prometheus.io/scrape: "true"spec:hostNetwork: true # wait up to five minutes for the drain of connectionsterminationGracePeriodSeconds: 300serviceAccountName: nginx-ingress-serviceaccountnodeSelector:Ingress: nginxkubernetes.io/os: linuxcontainers:- name: nginx-ingress-controllerimage: quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.29.0args:- /nginx-ingress-controller- --configmap=$(POD_NAMESPACE)/nginx-configuration- --tcp-services-configmap=$(POD_NAMESPACE)/tcp-services- --udp-services-configmap=$(POD_NAMESPACE)/udp-services- --publish-service=$(POD_NAMESPACE)/ingress-nginx- --annotations-prefix=nginx.ingress.kubernetes.io- --http-port=8080 # 如果你的master服務器已經安裝了nginx，這里需要修改下，否則無法啟動ingress-nginx服務- --https-port=8443 # 同上securityContext:allowPrivilegeEscalation: truecapabilities:drop:- ALLadd:- NET_BIND_SERVICE# www-data -> 101runAsUser: 101env:- name: POD_NAMEvalueFrom:fieldRef:fieldPath: metadata.name- name: POD_NAMESPACEvalueFrom:fieldRef:fieldPath: metadata.namespaceports:- name: httpcontainerPort: 80protocol: TCP- name: httpscontainerPort: 443protocol: TCPlivenessProbe:failureThreshold: 3httpGet:path: /healthzport: 10254scheme: HTTPinitialDelaySeconds: 10periodSeconds: 10successThreshold: 1timeoutSeconds: 10readinessProbe:failureThreshold: 3httpGet:path: /healthzport: 10254scheme: HTTPperiodSeconds: 10successThreshold: 1timeoutSeconds: 10lifecycle:preStop:exec:command:- /wait-shutdown---apiVersion: v1 kind: LimitRange metadata:name: ingress-nginxnamespace: ingress-nginxlabels:app.kubernetes.io/name: ingress-nginxapp.kubernetes.io/part-of: ingress-nginx spec:limits:- min:memory: 90Micpu: 100mtype: Container

參考文獻：

https://blog.csdn.net/qq_37746855/article/details/116173976

https://blog.csdn.net/weixin_46152207/article/details/111355788

https://blog.csdn.net/catcher92/article/details/116207040

https://blog.51cto.com/u_14306186/2523096

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