应用kubeadm初始化IPV4/IPV6集群
图片
CentOS 配置YUM源
cat <<EOF > /etc/yum.repos.d/kubernetes.repo[kubernetes]name=kubernetesbaseurl=https://mirrors.ustc.edu.cn/kubernetes/yum/repos/kubernetes-el7-$basearchenabled=1EOFsetenforce 0yum install -y kubelet kubeadm kubectl# 如装置老版本# yum install kubelet-1.16.9-0 kubeadm-1.16.9-0 kubectl-1.16.9-0systemctl enable kubelet && systemctl start kubelet# 将 SELinux 设置为 permissive 模式（相当于将其禁用）sudo setenforce 0sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/configsudo systemctl enable --now kubeletUbuntu 配置APT源
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -cat <<EOF >/etc/apt/sources.list.d/kubernetes.listdeb https://mirrors.ustc.edu.cn/kubernetes/apt kubernetes-xenial mainEOFapt-get updateapt-get install -y kubelet kubeadm kubectl# 如装置老版本# apt install kubelet=1.23.6-00 kubeadm=1.23.6-00 kubectl=1.23.6-00配置containerd
wget https://github.com/containerd/containerd/releases/download/v1.6.4/cri-containerd-cni-1.6.4-linux-amd64.tar.gz#解压tar -C / -xzf cri-containerd-cni-1.6.4-linux-amd64.tar.gz#创立服务启动文件cat > /etc/systemd/system/containerd.service <<EOF[Unit]Description=containerd container runtimeDocumentation=https://containerd.ioAfter=network.target local-fs.target[Service]ExecStartPre=-/sbin/modprobe overlayExecStart=/usr/local/bin/containerdType=notifyDelegate=yesKillMode=processRestart=alwaysRestartSec=5LimitNPROC=infinityLimitCORE=infinityLimitNOFILE=infinityTasksMax=infinityOOMScoreAdjust=-999[Install]WantedBy=multi-user.targetEOFmkdir -p /etc/containerdcontainerd config default | tee /etc/containerd/config.tomlsed -i "s#k8s.gcr.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.tomlsystemctl daemon-reloadsystemctl enable --now containerd配置根底环境
cat <<EOF | sudo tee /etc/modules-load.d/k8s.confbr_netfilterEOFcat <<EOF | sudo tee /etc/sysctl.d/k8s.confnet.ipv4.ip_forward = 1net.bridge.bridge-nf-call-iptables = 1fs.may_detach_mounts = 1vm.overcommit_memory=1vm.panic_on_oom=0fs.inotify.max_user_watches=89100fs.file-max=52706963fs.nr_open=52706963net.netfilter.nf_conntrack_max=2310720net.ipv4.tcp_keepalive_time = 600net.ipv4.tcp_keepalive_probes = 3net.ipv4.tcp_keepalive_intvl =15net.ipv4.tcp_max_tw_buckets = 36000net.ipv4.tcp_tw_reuse = 1net.ipv4.tcp_max_orphans = 327680net.ipv4.tcp_orphan_retries = 3net.ipv4.tcp_syncookies = 1net.ipv4.tcp_max_syn_backlog = 16384net.ipv4.ip_conntrack_max = 65536net.ipv4.tcp_max_syn_backlog = 16384net.ipv4.tcp_timestamps = 0net.core.somaxconn = 16384net.ipv6.conf.all.disable_ipv6 = 0net.ipv6.conf.default.disable_ipv6 = 0net.ipv6.conf.lo.disable_ipv6 = 0net.ipv6.conf.all.forwarding = 1EOFsudo sysctl --systemhostnamectl set-hostname k8s-master01hostnamectl set-hostname k8s-node01hostnamectl set-hostname k8s-node02sed -ri 's/.*swap.*/#&/' /etc/fstabswapoff -a && sysctl -w vm.swappiness=0cat /etc/fstabhostnamectl set-hostname k8s-master01hostnamectl set-hostname k8s-node01hostnamectl set-hostname k8s-node02cat > /etc/hosts <<EOF127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4::1 localhost localhost.localdomain localhost6 localhost6.localdomain62408:8207:78ce:7561::21 k8s-master012408:8207:78ce:7561::22 k8s-node012408:8207:78ce:7561::23 k8s-node0210.0.0.21 k8s-master0110.0.0.22 k8s-node0110.0.0.23 k8s-node02EOF初始化装置
root@k8s-master01:~# kubeadm config images list --image-repository registry.cn-hangzhou.aliyuncs.com/chenbyregistry.cn-hangzhou.aliyuncs.com/chenby/kube-apiserver:v1.24.0registry.cn-hangzhou.aliyuncs.com/chenby/kube-controller-manager:v1.24.0registry.cn-hangzhou.aliyuncs.com/chenby/kube-scheduler:v1.24.0registry.cn-hangzhou.aliyuncs.com/chenby/kube-proxy:v1.24.0registry.cn-hangzhou.aliyuncs.com/chenby/pause:3.7registry.cn-hangzhou.aliyuncs.com/chenby/etcd:3.5.3-0registry.cn-hangzhou.aliyuncs.com/chenby/coredns:v1.8.6root@k8s-master01:~# vim kubeadm.yaml root@k8s-master01:~# cat kubeadm.yamlapiVersion: kubeadm.k8s.io/v1beta3kind: InitConfigurationlocalAPIEndpoint: advertiseAddress: "2408:8207:78ce:7561::21" bindPort: 6443nodeRegistration: taints: - effect: PreferNoSchedule key: node-role.kubernetes.io/master---apiVersion: kubeadm.k8s.io/v1beta3kind: ClusterConfigurationkubernetesVersion: v1.24.0imageRepository: registry.cn-hangzhou.aliyuncs.com/chenbynetworking: podSubnet: 172.16.0.0/12,fc00::/48 serviceSubnet: 10.96.0.0/12,fd00::/108root@k8s-master01:~#root@k8s-master01:~# root@k8s-master01:~# kubeadm init --config=kubeadm.yaml [init] Using Kubernetes version: v1.24.0[preflight] Running pre-flight checks[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] Generating "ca" certificate and key[certs] Generating "apiserver" certificate and key[certs] apiserver serving cert is signed for DNS names [k8s-master01 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 10.0.0.21][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 [k8s-master01 localhost] and IPs [10.0.0.21 127.0.0.1 ::1][certs] Generating "etcd/peer" certificate and key[certs] etcd/peer serving cert is signed for DNS names [k8s-master01 localhost] and IPs [10.0.0.21 127.0.0.1 ::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[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[apiclient] All control plane components are healthy after 6.504341 seconds[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace[kubelet] Creating a ConfigMap "kubelet-config" 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-master01 as control-plane by adding the labels: [node-role.kubernetes.io/control-plane node.kubernetes.io/exclude-from-external-load-balancers][mark-control-plane] Marking the node k8s-master01 as control-plane by adding the taints [node-role.kubernetes.io/master:PreferNoSchedule][bootstrap-token] Using token: lnodkp.3n8i4m33sqwg39w2[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/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo 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 10.0.0.21:6443 --token lnodkp.3n8i4m33sqwg39w2 \ --discovery-token-ca-cert-hash sha256:0ed7e18ea2b49bb599bc45e72f764bbe034ef1dce47729f2722467c167754da8 root@k8s-master01:~# root@k8s-master01:~# mkdir -p $HOME/.kuberoot@k8s-master01:~# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/configroot@k8s-master01:~# sudo chown $(id -u):$(id -g) $HOME/.kube/configroot@k8s-master01:~# root@k8s-node01:~# kubeadm join 10.0.0.21:6443 --token qf3z22.qwtqieutbkik6dy4 \> --discovery-token-ca-cert-hash sha256:2ade8c834a41cc1960993a600c89fa4bb86e3594f82e09bcd42633d4defbda0d[preflight] Running pre-flight checks[preflight] Reading configuration from the cluster...[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"[kubelet-start] Starting the kubelet[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...This node has joined the cluster:* Certificate signing request was sent to apiserver and a response was received.* The Kubelet was informed of the new secure connection details.Run 'kubectl get nodes' on the control-plane to see this node join the cluster.root@k8s-node01:~# root@k8s-node02:~# kubeadm join 10.0.0.21:6443 --token qf3z22.qwtqieutbkik6dy4 \> --discovery-token-ca-cert-hash sha256:2ade8c834a41cc1960993a600c89fa4bb86e3594f82e09bcd42633d4defbda0d[preflight] Running pre-flight checks[preflight] Reading configuration from the cluster...[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"[kubelet-start] Starting the kubelet[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...This node has joined the cluster:* Certificate signing request was sent to apiserver and a response was received.* The Kubelet was informed of the new secure connection details.Run 'kubectl get nodes' on the control-plane to see this node join the cluster.root@k8s-node02:~# 查看集群
root@k8s-master01:~# kubectl get nodeNAME STATUS ROLES AGE VERSIONk8s-master01 Ready control-plane 111s v1.24.0k8s-node01 Ready <none> 82s v1.24.0k8s-node02 Ready <none> 92s v1.24.0root@k8s-master01:~# root@k8s-master01:~# root@k8s-master01:~# kubectl get pod -ANAMESPACE NAME READY STATUS RESTARTS AGEkube-system coredns-bc77466fc-jxkpv 1/1 Running 0 83skube-system coredns-bc77466fc-nrc9l 1/1 Running 0 83skube-system etcd-k8s-master01 1/1 Running 0 87skube-system kube-apiserver-k8s-master01 1/1 Running 0 89skube-system kube-controller-manager-k8s-master01 1/1 Running 0 87skube-system kube-proxy-2lgrn 1/1 Running 0 83skube-system kube-proxy-69p9r 1/1 Running 0 47skube-system kube-proxy-g58m2 1/1 Running 0 42skube-system kube-scheduler-k8s-master01 1/1 Running 0 87sroot@k8s-master01:~# 配置calico
wget https://raw.githubusercontent.com/cby-chen/Kubernetes/main/yaml/calico-ipv6.yaml# vim calico-ipv6.yaml# calico-config ConfigMap处 "ipam": { "type": "calico-ipam", "assign_ipv4": "true", "assign_ipv6": "true" }, - name: IP value: "autodetect" - name: IP6 value: "autodetect" - name: CALICO_IPV4POOL_CIDR value: "172.16.0.0/16" - name: CALICO_IPV6POOL_CIDR value: "fc00::/48" - name: FELIX_IPV6SUPPORT value: "true"kubectl apply -f calico-ipv6.yaml 测试IPV6
root@k8s-master01:~# cat cby.yaml apiVersion: apps/v1kind: Deploymentmetadata: name: chenbyspec: replicas: 3 selector: matchLabels: app: chenby template: metadata: labels: app: chenby spec: containers: - name: chenby image: nginx resources: limits: memory: "128Mi" cpu: "500m" ports: - containerPort: 80---apiVersion: v1kind: Servicemetadata: name: chenbyspec: ipFamilyPolicy: PreferDualStack ipFamilies: - IPv6 - IPv4 type: NodePort selector: app: chenby ports: - port: 80 targetPort: 80kubectl apply -f cby.yaml root@k8s-master01:~# kubectl get pod NAME READY STATUS RESTARTS AGEchenby-57479d5997-6pfzg 1/1 Running 0 6mchenby-57479d5997-jjwpk 1/1 Running 0 6mchenby-57479d5997-pzrkc 1/1 Running 0 6mroot@k8s-master01:~# kubectl get svcNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGEchenby NodePort fd00::f816 <none> 80:30265/TCP 6m7skubernetes ClusterIP 10.96.0.1 <none> 443/TCP 168mroot@k8s-master01:~# curl -I http://[2408:8207:78ce:7561::21]:30265/HTTP/1.1 200 OKServer: nginx/1.21.6Date: Wed, 11 May 2022 07:01:43 GMTContent-Type: text/htmlContent-Length: 615Last-Modified: Tue, 25 Jan 2022 15:03:52 GMTConnection: keep-aliveETag: "61f01158-267"Accept-Ranges: bytesroot@k8s-master01:~# curl -I http://10.0.0.21:30265/HTTP/1.1 200 OKServer: nginx/1.21.6Date: Wed, 11 May 2022 07:01:54 GMTContent-Type: text/htmlContent-Length: 615Last-Modified: Tue, 25 Jan 2022 15:03:52 GMTConnection: keep-aliveETag: "61f01158-267"Accept-Ranges: byteshttps://www.oiox.cn/
https://www.chenby.cn/
https://blog.oiox.cn/
https://cby-chen.github.io/
https://blog.csdn.net/qq\_33921750
https://my.oschina.net/u/3981543
https://www.zhihu.com/people/...
https://segmentfault.com/u/hp...
https://juejin.cn/user/331578...
https://cloud.tencent.com/dev...
https://www.jianshu.com/u/0f8...
https://www.toutiao.com/c/use...
CSDN、GitHub、知乎、开源中国、思否、掘金、简书、腾讯云、今日头条、集体博客、全网可搜《小陈运维》
文章次要公布于微信公众号：《Linux运维交换社区》
本文应用 文章同步助手 同步