14）安装docker-ce
~]# yum-config-manager --add-repo ~]# yum install docker-ce docker-ce-cli containerd.io -y ~]# systemctl start docker && systemctl enable docker.service && systemctl status docker15）配置docker镜像加速器
# 注意：修改docker文件驱动为systemd，默认为cgroupfs，kubelet默认使用systemd，两者必须一致才可以 ~]# tee /etc/docker/daemon.json << \'EOF\' { "registry-mirrors":["https://rsbud4vc.mirror.aliyuncs.com","https://registry.docker-cn.com","https://docker.mirrors.ustc.edu.cn","https://dockerhub.azk8s.cn","http://hub-mirror.c.163.com","http://qtid6917.mirror.aliyuncs.com", "https://rncxm540.mirror.aliyuncs.com"], "exec-opts": ["native.cgroupdriver=systemd"] } EOF ~]# systemctl daemon-reload && systemctl restart docker && systemctl status docker 二、kubeadm部署集群 2.1、配置kubernetes的repo源 [root@k8s-master1 ~]# vim /etc/yum.repos.d/kubernetes.repo [kubernetes] name=Kubernetes baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/ enabled=1 gpgcheck=0 # 将k8s-master1上Kubernetes的repo源复制给k8s-node1和k8s-node2 [root@k8s-master1 ~]# scp /etc/yum.repos.d/kubernetes.repo k8s-node1:/etc/yum.repos.d/ [root@k8s-master1 ~]# scp /etc/yum.repos.d/kubernetes.repo k8s-node2:/etc/yum.repos.d/ 2.2、安装初始化需要的软件包 [root@k8s-master1 ~]# yum install -y kubelet-1.20.6 kubeadm-1.20.6 kubectl-1.20.6 [root@k8s-master1 ~]# systemctl enable kubelet && systemctl start kubelet [root@k8s-master1 ~]# systemctl status kubelet [root@k8s-node1 ~]# yum install -y kubelet-1.20.6 kubeadm-1.20.6 kubectl-1.20.6 [root@k8s-node1 ~]# systemctl enable kubelet && systemctl start kubelet [root@k8s-node1 ~]# systemctl status kubelet [root@k8s-node2 ~]# yum install -y kubelet-1.20.6 kubeadm-1.20.6 kubectl-1.20.6 [root@k8s-node2 ~]# systemctl enable kubelet && systemctl start kubelet [root@k8s-node2 ~]# systemctl status kubelet 2.3、kubeadm初始化k8s集群1）kubeadm初始化
[root@k8s-master1 ~]# kubeadm init --kubernetes-version=1.20.6 --apiserver-advertise-address=192.168.40.180 --image-repository registry.aliyuncs.com/google_containers --pod-network-cidr=10.244.0.0/16 --ignore-preflight-errors=SystemVerification [init] Using Kubernetes version: v1.20.6 [preflight] Running pre-flight checks [WARNING SystemVerification]: this Docker version is not on the list of validated versions: 20.10.7. Latest validated version: 19.03 [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\' [certs] Using certificateDir folder "/etc/kubernetes/pki" [certs] Using existing ca certificate authority [certs] Using existing apiserver certificate and key on disk [certs] Using existing apiserver-kubelet-client certificate and key on disk [certs] Using existing front-proxy-ca certificate authority [certs] Using existing front-proxy-client certificate and key on disk [certs] Using existing etcd/ca certificate authority [certs] Using existing etcd/server certificate and key on disk [certs] Using existing etcd/peer certificate and key on disk [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 [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 [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" [control-plane] Creating static Pod manifest for "kube-scheduler" [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 [kubelet-check] Initial timeout of 40s passed. [apiclient] All control plane components are healthy after 92.005918 seconds [upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace [kubelet] Creating a ConfigMap "kubelet-config-1.20" 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 k8s-master1 as control-plane by adding the labels "node-role.kubernetes.io/master=\'\'" and "node-role.kubernetes.io/control-plane=\'\' (deprecated)" [mark-control-plane] Marking the node k8s-master1 as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule] [bootstrap-token] Using token: jybm37.w3g3mx8qc73hypm3 [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-proxy 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/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config Alternatively, if you are the root user, you can run: export KUBECONFIG=http://www.likecs.com/etc/kubernetes/admin.conf You 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 192.168.40.180:6443 --token jybm37.w3g3mx8qc73hypm3 \ --discovery-token-ca-cert-hash sha256:c8e2661a2099c73475f0dcfb0679de5746f53a93d230b25e45c6ea3ce3f0d7c1