Kubernetes 1.17.2 高可用部署
20.0.0.200 10.0.0.200 bs-k8s-master01 管理节点 2c2g 20.0.0.201 10.0.0.201 bs-k8s-master02 管理节点 2c2g 20.0.0.202 10.0.0.202 bs-k8s-master03 管理节点 2c2g 20.0.0.203 10.0.0.203 bs-k8s-node01 业务节点 2c2g 20.0.0.204 10.0.0.204 bs-k8s-node02 业务节点 2c2g 20.0.0.205 10.0.0.205 bs-k8s-node03 业务节点 2c2g 服务器准备 所有机器 以bs-k8s-master01为例 #关闭selinux/firewalld/iptables [root@bs-k8s-master01 ~]# setenforce 0 \ > && sed -i 's/^SELINUX=.*$/SELINUX=disabled/' /etc/selinux/config \ > && getenforce l -y iptables-services \ && systemctl stop iptables \ && systemctl disable iptables \ && systemctl status iptablessetenforce: SELinux is disabled [root@bs-k8s-master01 ~]# [root@bs-k8s-master01 ~]# systemctl stop firewalld \ > && systemctl daemon-reload \ > && systemctl disable firewalld \ > && systemctl daemon-reload \ > && systemctl status firewalld [root@bs-k8s-master01 ~]# [root@bs-k8s-master01 ~]# yum install -y iptables-services \ > && systemctl stop iptables \ > && systemctl disable iptables \ > && systemctl status iptables #添加host解析记录 [root@bs-k8s-master01 ~]# cat >> /etc/hosts <<EOF > 20.0.0.200 bs-k8s-master01 > 20.0.0.201 bs-k8s-master02 > 20.0.0.202 bs-k8s-master03 > 20.0.0.203 bs-k8s-node01 > 20.0.0.204 bs-k8s-node02 > 20.0.0.205 bs-k8s-node03 > EOF #更换阿里源 [root@bs-k8s-master01 ~]# cp -r /etc/yum.repos.d /etc/yum.repos.d.bak [root@bs-k8s-master01 ~]# rm -f /etc/yum.repos.d/*.repo [root@bs-k8s-master01 ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo \ > && wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo [root@bs-k8s-master01 ~]# yum clean all && yum makecache #设置limits.conf [root@bs-k8s-master01 ~]# cat >> /etc/security/limits.conf <<EOF > # End of file > * soft nproc 10240000 > * hard nproc 10240000 > * soft nofile 10240000 > * hard nofile 10240000 > EOF #设置sysctl.conf [root@bs-k8s-master01 ~]#[ ! -e "/etc/sysctl.conf_bk" ] && /bin/mv /etc/sysctl.conf{,_bk} \ && cat > /etc/sysctl.conf << EOF fs.file-max=1000000 fs.nr_open=20480000 net.ipv4.tcp_max_tw_buckets = 180000 net.ipv4.tcp_sack = 1 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_rmem = 4096 87380 4194304 net.ipv4.tcp_wmem = 4096 16384 4194304 net.ipv4.tcp_max_syn_backlog = 16384 net.core.netdev_max_backlog = 32768 net.core.somaxconn = 32768 net.core.wmem_default = 8388608 net.core.rmem_default = 8388608 net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.ipv4.tcp_timestamps = 0 net.ipv4.tcp_fin_timeout = 20 net.ipv4.tcp_synack_retries = 2 net.ipv4.tcp_syn_retries = 2 net.ipv4.tcp_syncookies = 1 #net.ipv4.tcp_tw_len = 1 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_mem = 94500000 915000000 927000000 net.ipv4.tcp_max_orphans = 3276800 net.ipv4.ip_local_port_range = 1024 65000 #net.nf_conntrack_max = 6553500 #net.netfilter.nf_conntrack_max = 6553500 #net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60 #net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120 #net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120 #net.netfilter.nf_conntrack_tcp_timeout_established = 3600 EOF [root@bs-k8s-master01 ~]#sysctl -p #配置时间同步 [root@bs-k8s-master01 ~]#ntpdate -u pool.ntp.org [root@bs-k8s-master01 ~]#crontab -e #加入定时任务 */15 * * * * /usr/sbin/ntpdate -u pool.ntp.org >/dev/null 2>&1 #配置k8s.conf [root@bs-k8s-master01 ~]#cat <<EOF > /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-iptables=1 net.bridge.bridge-nf-call-ip6tables=1 net.ipv4.ip_forward=1 net.ipv4.tcp_tw_recycle=0 vm.swappiness=0 vm.overcommit_memory=1 vm.panic_on_oom=0 fs.inotify.max_user_watches=89100 fs.file-max=52706963 fs.nr_open=52706963 net.ipv6.conf.all.disable_ipv6=1 net.netfilter.nf_conntrack_max=2310720 EOF #执行命令使其修改生效 [root@bs-k8s-master01 ~]#modprobe br_netfilter \ [root@bs-k8s-master01 ~]#&& sysctl -p /etc/sysctl.d/k8s.conf #关闭交换分区 [root@bs-k8s-master01 ~]# swapoff -a [root@bs-k8s-master01 ~]# yes | cp /etc/fstab /etc/fstab_bak [root@bs-k8s-master01 ~]# cat /etc/fstab_bak |grep -v swap > /etc/fstab #加载ipvs模块 [root@bs-k8s-master01 ~]#cat > /etc/sysconfig/modules/ipvs.modules <<EOF #!/bin/bash modprobe -- ip_vs modprobe -- ip_vs_rr modprobe -- ip_vs_wrr modprobe -- ip_vs_sh modprobe -- nf_conntrack_ipv4 EOF [root@bs-k8s-master01 ~]#chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4 #添加k8s yum源 [root@bs-k8s-master01 ~]#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 #安装服务器必备软件 [root@bs-k8s-master01 ~]# yum -y install wget vim iftop iotop net-tools nmon telnet lsof iptraf nmap httpd-tools lrzsz mlocate ntp ntpdate strace libpcap nethogs iptraf iftop nmon bridge-utils bind-utils telnet nc nfs-utils rpcbind nfs-utils dnsmasq python python-devel yum-utils device-mapper-persistent-data lvm2 tcpdump mlocate tree #添加docker源信息 [root@bs-k8s-master01 ~]# yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo [root@bs-k8s-master01 ~]# yum list docker-ce --showduplicates | sort -r [root@bs-k8s-master01 ~]# yum -y install docker-ce-18.06.3.ce-3.el7 #配置daemon.json文件 #获取镜像加速 #阿里云 # 打开网址：https://cr.console.aliyun.com/#/accelerator # 注册、登录、设置密码 # 然后在页面上可以看到加速器地址，类似于：https://123abc.mirror.aliyuncs.com #腾讯云（非腾讯云主机不可用） #加速地址：https://mirror.ccs.tencentyun.com [root@bs-k8s-master01 ~]# mkdir -p /etc/docker/ \ > && cat > /etc/docker/daemon.json << EOF > { > "registry-mirrors":[ > "https://c6ai9izk.mirror.aliyuncs.com" > ], > "max-concurrent-downloads":3, > "data-root":"/data/docker", > "log-driver":"json-file", > "log-opts":{ > "max-size":"100m", > "max-file":"1" > }, > "max-concurrent-uploads":5, > "storage-driver":"overlay2", > "storage-opts": [ > "overlay2.override_kernel_check=true" > ] > } "live-restore": true, "exec-opts": [ "native.cgroupdriver=systemd" ] > EOF [root@bs-k8s-master01 ~]# systemctl enable docker \ > && systemctl restart docker \ > && systemctl status docker #使用kubeadm 部署kubernetes1.17.2 [root@bs-k8s-master01 ~]# yum list kubelet kubeadm kubectl --showduplicates | sort -r [root@bs-k8s-master01 ~]# yum install -y kubelet-1.17.2 kubeadm-1.17.2 kubectl-1.17.2 ipvsadm ipset #设置kubelet开机自启动,注意：这一步不能直接执行 systemctl start kubelet，会报错，成功初始化完后kubelet会自动起来 [root@bs-k8s-master01 ~]# systemctl enable kubelet Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service. [root@bs-k8s-master01 ~]# #kubectl 命令补全 [root@bs-k8s-master01 ~]# source /usr/share/bash-completion/bash_completion [root@bs-k8s-master01 ~]# source <(kubectl completion bash) [root@bs-k8s-master01 ~]# echo "source <(kubectl completion bash)" >> ~/.bashrc 以下 无特殊说明 在bs-k8s-master01上操作 #免密钥登陆 [root@bs-k8s-master01 ~]# vim /service/scripts/ssh-cp.sh ########################################################################## #Author: zisefeizhu #QQ: 2********0 #Date: 2020-02-02 #FileName: /service/scripts/ssh-cp.sh #URL: https://www.cnblogs.com/zisefeizhu/ #Description: The test script #Copyright (C): 2020 All rights reserved ########################################################################## #!/bin/bash PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin export $PATH #目标主机列表 IP=" 20.0.0.200 bs-k8s-master01 20.0.0.201 bs-k8s-master02 20.0.0.202 bs-k8s-master03 20.0.0.203 bs-k8s-node01 20.0.0.204 bs-k8s-node02 20.0.0.205 bs-k8s-node03 " for node in ${IP};do sshpass -p 1 ssh-copy-id ${node} -o StrictHostKeyChecking=no if [ $? -eq 0 ];then echo "${node} 秘钥copy完成" else echo "${node} 秘钥copy失败" fi done [root@bs-k8s-master01 ~]# ssh-keygen -t rsa [root@bs-k8s-master01 ~]# sh /service/scripts/ssh-cp.sh #修改初始化配置 使用kubeadm config print init-defaults > kubeadm-init.yaml 打印出默认配置，然后在根据自己的环境修改配置 注意 需要修改advertiseAddress、controlPlaneEndpoint、imageRepository、serviceSubnet、kubernetesVersion advertiseAddress 为master01的ip controlPlaneEndpoint 为VIP+8443端口 imageRepository 修改为阿里的源 serviceSubnet 一段没有使用的IP段 kubernetesVersion 和上一步的版本一致 [root@bs-k8s-master01 ~]# cd /data/ [root@bs-k8s-master01 data]# mkdir k8s [root@bs-k8s-master01 data]# cd k8s/ [root@bs-k8s-master01 k8s]# ls [root@bs-k8s-master01 k8s]# mkdir Initialisierung [root@bs-k8s-master01 k8s]# cd Initialisierung/ [root@bs-k8s-master01 Initialisierung]# kubeadm config print init-defaults > kubeadm-init.yaml W0202 16:04:55.195871 4006 validation.go:28] Cannot validate kube-proxy config - no validator is available W0202 16:04:55.195969 4006 validation.go:28] Cannot validate kubelet config - no validator is available [root@bs-k8s-master01 Initialisierung]# cp kubeadm-init.yaml{,.bak} [root@bs-k8s-master01 Initialisierung]# diff kubeadm-init.yaml{,.bak} 12c12 < advertiseAddress: 20.0.0.200 --- > advertiseAddress: 1.2.3.4 26d25 < controlPlaneEndpoint: "20.0.0.250:8443" 33c32 < imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers --- > imageRepository: k8s.gcr.io 35c34 < kubernetesVersion: v1.17.2 --- > kubernetesVersion: v1.17.0 38d36 < podSubnet: "10.209.0.0/16" #预下载镜像 [root@bs-k8s-master01 Initialisierung]# kubeadm config images pull --config kubeadm-init.yaml #初始化 [root@bs-k8s-master01 Initialisierung]# kubeadm config images pull --config kubeadm-init.yaml W0202 16:15:50.198535 4055 validation.go:28] Cannot validate kube-proxy config - no validator is available W0202 16:15:50.198633 4055 validation.go:28] Cannot validate kubelet config - no validator is available [config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:v1.17.2 [config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:v1.17.2 [config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:v1.17.2 [config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:v1.17.2 [config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1 [config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:3.4.3-0 [config/images] Pulled registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.6.5 [root@bs-k8s-master01 Initialisierung]# [root@bs-k8s-master01 Initialisierung]# kubeadm init --config kubeadm-init.yaml W0202 16:17:51.926686 4259 validation.go:28] Cannot validate kube-proxy config - no validator is available W0202 16:17:51.926769 4259 validation.go:28] Cannot validate kubelet config - no validator is available [init] Using Kubernetes version: v1.17.2 [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' [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 [bs-k8s-master01 kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 20.0.0.200 20.0.0.250] [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 [bs-k8s-master01 localhost] and IPs [20.0.0.200 127.0.0.1 ::1] [certs] Generating "etcd/peer" certificate and key [certs] etcd/peer serving cert is signed for DNS names [bs-k8s-master01 localhost] and IPs [20.0.0.200 127.0.0.1 ::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" [endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address [kubeconfig] Writing "admin.conf" kubeconfig file [endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address [kubeconfig] Writing "kubelet.conf" kubeconfig file [endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address [kubeconfig] Writing "controller-manager.conf" kubeconfig file [endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address [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" W0202 16:17:57.407938 4259 manifests.go:214] the default kube-apiserver authorization-mode is "Node,RBAC"; using "Node,RBAC" [control-plane] Creating static Pod manifest for "kube-scheduler" W0202 16:17:57.411148 4259 manifests.go:214] 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 18.038392 seconds [upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace [kubelet] Creating a ConfigMap "kubelet-config-1.17" 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 bs-k8s-master01 as control-plane by adding the label "node-role.kubernetes.io/master=''" [mark-control-plane] Marking the node bs-k8s-master01 as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule] [bootstrap-token] Using token: abcdef.0123456789abcdef [bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles [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 [endpoint] WARNING: port specified in controlPlaneEndpoint overrides bindPort in the controlplane address [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 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/ You can now join any number of control-plane nodes by copying certificate authorities and service account keys on each node and then running the following as root: kubeadm join 20.0.0.250:8443 --token abcdef.0123456789abcdef \ --discovery-token-ca-cert-hash sha256:ff9bd96896f749ddcb8597fb958eb38654fb64af89ed844076018bf9b2a6dfd3 \ --control-plane Then you can join any number of worker nodes by running the following on each as root: kubeadm join 20.0.0.250:8443 --token abcdef.0123456789abcdef \ --discovery-token-ca-cert-hash sha256:ff9bd96896f749ddcb8597fb958eb38654fb64af89ed844076018bf9b2a6dfd3 #为kubectl准备Kubeconfig文件 kubectl默认会在执行的用户家目录下面的.kube目录下寻找config文件。这里是将在初始化时[kubeconfig]步骤生成的admin.conf拷贝到.kube/config [root@bs-k8s-master01 Initialisierung]# mkdir -p $HOME/.kube [root@bs-k8s-master01 Initialisierung]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config [root@bs-k8s-master01 Initialisierung]# sudo chown $(id -u):$(id -g) $HOME/.kube/config 在该配置文件中，记录了API Server的访问地址，所以后面直接执行kubectl命令就可以正常连接到API Server中 #查看组件 [root@bs-k8s-master01 Initialisierung]# kubectl get cs NAME STATUS MESSAGE ERROR controller-manager Healthy ok scheduler Healthy ok etcd-0 Healthy {"health":"true"} [root@bs-k8s-master01 Initialisierung]# kubectl get nodes NAME STATUS ROLES AGE VERSION bs-k8s-master01 NotReady master 5m3s v1.17.2 #其他master节点部署 [root@bs-k8s-master01 Initialisierung]# vim /service/scripts/k8s-master-zhengshu.sh [root@bs-k8s-master01 Initialisierung]# cat /service/scripts/k8s-master-zhengshu.sh ########################################################################## #Author: zisefeizhu #QQ: 2********0 #Date: 2020-02-02 #FileName: /service/scripts/k8s-master-zhengshu.sh #URL: https://www.cnblogs.com/zisefeizhu/ #Description: The test script #Copyright (C): 2020 All rights reserved ########################################################################## #!/bin/bash PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin export $PATH USER=root CONTROL_PLANE_IPS="bs-k8s-master02 bs-k8s-master03" for host in ${CONTROL_PLANE_IPS}; do ssh "${USER}"@$host "mkdir -p /etc/kubernetes/pki/etcd" scp /etc/kubernetes/pki/ca.* "${USER}"@$host:/etc/kubernetes/pki/ scp /etc/kubernetes/pki/sa.* "${USER}"@$host:/etc/kubernetes/pki/ scp /etc/kubernetes/pki/front-proxy-ca.* "${USER}"@$host:/etc/kubernetes/pki/ scp /etc/kubernetes/pki/etcd/ca.* "${USER}"@$host:/etc/kubernetes/pki/etcd/ scp /etc/kubernetes/admin.conf "${USER}"@$host:/etc/kubernetes/ done #bs-k8s-master02 [root@bs-k8s-master02 ~]# kubeadm join 20.0.0.250:8443 --token abcdef.0123456789abcdef \ > --discovery-token-ca-cert-hash sha256:ff9bd96896f749ddcb8597fb958eb38654fb64af89ed844076018bf9b2a6dfd3 \ > --control-plane [root@bs-k8s-master02 ~]# mkdir -p $HOME/.kube [root@bs-k8s-master02 ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config [root@bs-k8s-master02 ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config #bs-k8s-master03 [root@bs-k8s-master03 ~]# kubeadm join 20.0.0.250:8443 --token abcdef.0123456789abcdef \ > --discovery-token-ca-cert-hash sha256:ff9bd96896f749ddcb8597fb958eb38654fb64af89ed844076018bf9b2a6dfd3 \ > --control-plane [root@bs-k8s-master02 ~]# mkdir -p $HOME/.kube [root@bs-k8s-master02 ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config [root@bs-k8s-master02 ~]# sudo chown $(id -u):$(id -g) $HOME/.kube/config [root@bs-k8s-master01 ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION bs-k8s-master01 NotReady master 14m v1.17.2 bs-k8s-master02 NotReady master 91s v1.17.2 bs-k8s-master03 NotReady master 104s v1.17.2 #node节点部署 [root@bs-k8s-node01 ~]# kubeadm join 20.0.0.250:8443 --token abcdef.0123456789abcdef \ > --discovery-token-ca-cert-hash sha256:ff9bd96896f749ddcb8597fb958eb38654fb64af89ed844076018bf9b2a6dfd3 [root@bs-k8s-node02 ~]# kubeadm join 20.0.0.250:8443 --token abcdef.0123456789abcdef \ > --discovery-token-ca-cert-hash sha256:ff9bd96896f749ddcb8597fb958eb38654fb64af89ed844076018bf9b2a6dfd3 [root@bs-k8s-node03 ~]# kubeadm join 20.0.0.250:8443 --token abcdef.0123456789abcdef \ > --discovery-token-ca-cert-hash sha256:ff9bd96896f749ddcb8597fb958eb38654fb64af89ed844076018bf9b2a6dfd3 #部署网络插件calico [root@bs-k8s-master01 ~]# cd /data/k8s/ [root@bs-k8s-master01 k8s]# ls Initialisierung [root@bs-k8s-master01 k8s]# mkdir yaml [root@bs-k8s-master01 k8s]# cd yaml/ [root@bs-k8s-master01 yaml]# wget http://docs.projectcalico.org/v3.11/getting-started/kubernetes/installation/hosted/calico.yaml [root@bs-k8s-master01 yaml]# cp calico.yaml{,.bak} [root@bs-k8s-master01 yaml]# vim calico.yaml [root@bs-k8s-master01 yaml]# diff calico.yaml{,.bak} 598c598 < value: "10.209.0.0/16" --- > value: "192.168.0.0/16" [root@bs-k8s-master01 yaml]# kubectl apply -f calico.yaml #查看节点状态 [root@bs-k8s-master01 yaml]# kubectl get nodes NAME STATUS ROLES AGE VERSION bs-k8s-master01 Ready master 44m v1.17.2 bs-k8s-master02 Ready master 32m v1.17.2 bs-k8s-master03 Ready master 32m v1.17.2 bs-k8s-node01 Ready <none> 29m v1.17.2 bs-k8s-node02 Ready <none> 29m v1.17.2 bs-k8s-node03 Ready <none> 29m v1.17.2 #kube-proxy开启ipvs[单个master节点执行] 修改ConfigMap的kube-system/kube-proxy中的config.conf，mode: "ipvs" [root@bs-k8s-master01 yaml]#kubectl edit cm kube-proxy -n kube-system #重启各个节点上的kube-proxy pod [root@bs-k8s-master01 yaml]# kubectl get pod -n kube-system | grep kube-proxy | awk '{system("kubectl delete pod "$1" -n kube-system")}' pod "kube-proxy-57gm2" deleted pod "kube-proxy-7gpws" deleted pod "kube-proxy-8jb4x" deleted pod "kube-proxy-lhqmg" deleted pod "kube-proxy-s2t4s" deleted pod "kube-proxy-smfv8" deleted #查看kube-proxy pod状态 [root@bs-k8s-master01 yaml]# kubectl get pod -n kube-system | grep kube-proxy kube-proxy-2wks8 1/1 Running 0 46s kube-proxy-7jr5q 1/1 Running 0 33s kube-proxy-7qzz8 1/1 Running 0 55s kube-proxy-cgz5z 1/1 Running 0 37s kube-proxy-fxxxs 1/1 Running 0 49s kube-proxy-lc9gt 1/1 Running 0 59s #查看是否开启了ivs [root@bs-k8s-master01 yaml]# kubectl logs kube-proxy-2wks8 -n kube-system I0202 09:10:37.049020 1 node.go:135] Successfully retrieved node IP: 20.0.0.201 I0202 09:10:37.049089 1 server_others.go:172] Using ipvs Proxier. W0202 09:10:37.049375 1 proxier.go:420] IPVS scheduler not specified, use rr by default I0202 09:10:37.049560 1 server.go:571] Version: v1.17.2 I0202 09:10:37.049979 1 conntrack.go:52] Setting nf_conntrack_max to 131072 I0202 09:10:37.050282 1 config.go:313] Starting service config controller I0202 09:10:37.050303 1 shared_informer.go:197] Waiting for caches to sync for service config I0202 09:10:37.050409 1 config.go:131] Starting endpoints config controller I0202 09:10:37.050443 1 shared_informer.go:197] Waiting for caches to sync for endpoints config I0202 09:10:37.157807 1 shared_informer.go:204] Caches are synced for endpoints config I0202 09:10:37.162308 1 shared_informer.go:204] Caches are synced for service config 日志中打印出了Using ipvs Proxier，说明ipvs模式已经开启 #查看ipvs 状态 [root@bs-k8s-master01 yaml]# ipvsadm -L -n IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 10.96.0.1:443 rr -> 20.0.0.200:6443 Masq 1 0 0 -> 20.0.0.201:6443 Masq 1 0 0 -> 20.0.0.202:6443 Masq 1 0 0 TCP 10.96.0.10:53 rr -> 10.209.194.129:53 Masq 1 0 0 -> 10.209.194.130:53 Masq 1 0 0 TCP 10.96.0.10:9153 rr -> 10.209.194.129:9153 Masq 1 0 0 -> 10.209.194.130:9153 Masq 1 0 0 UDP 10.96.0.10:53 rr -> 10.209.194.129:53 Masq 1 0 0 -> 10.209.194.130:53 Masq 1 0 0 [root@hs-k8s-master01 calico-3.11]# wget https://docs.projectcalico.org/v3.11/manifests/calico.yam^C [root@hs-k8s-master01 calico-3.11]# kubectl apply -f calico.yaml ^C^C^C^C^C^C^C[root@hs-k8s-master01 calico-3.11]# ^C [root@hs-k8s-master01 calico-3.11]# ls calico.yaml calico.yaml.bak [root@hs-k8s-master01 calico-3.11]# free -h total used free shared buff/cache available Mem: 2.9G 806M 1.1G 1.1M 1.0G 1.8G Swap: 0B 0B 0B [root@hs-k8s-master01 calico-3.11]# kubectl apply -f calico.yaml configmap/calico-config created customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created clusterrole.rbac.authorization.k8s.io/calico-node created clusterrolebinding.rbac.authorization.k8s.io/calico-node created daemonset.apps/calico-node created serviceaccount/calico-node created deployment.apps/calico-kube-controllers created serviceaccount/calico-kube-controllers created [root@hs-k8s-master01 ~]# kubectl get pods -n kube-system NAME READY STATUS RESTARTS AGE calico-kube-controllers-5b644bc49c-wdssd 1/1 Running 0 18m calico-node-bjtbm 1/1 Running 0 18m calico-node-c4hfp 1/1 Running 7 18m calico-node-m5vz7 1/1 Running 4 18m calico-node-pvkdn 1/1 Running 1 18m calico-node-qmfz8 1/1 Running 2 18m calico-node-sbgfk 1/1 Running 1 18m coredns-7f9c544f75-b7ksm 1/1 Running 0 66m coredns-7f9c544f75-gg4rm 1/1 Running 0 66m etcd-bs-k8s-master02 1/1 Running 4 58m etcd-bs-k8s-master03 1/1 Running 8 59m etcd-hs-k8s-master01 1/1 Running 6 66m kube-apiserver-bs-k8s-master02 1/1 Running 12 58m kube-apiserver-bs-k8s-master03 1/1 Running 12 59m kube-apiserver-hs-k8s-master01 1/1 Running 10 66m kube-controller-manager-bs-k8s-master02 1/1 Running 6 57m kube-controller-manager-bs-k8s-master03 1/1 Running 6 59m kube-controller-manager-hs-k8s-master01 1/1 Running 5 66m kube-proxy-2cffl 1/1 Running 2 58m kube-proxy-d95pz 1/1 Running 2 63m kube-proxy-j6hxc 1/1 Running 2 59m kube-proxy-kgwll 1/1 Running 2 62m kube-proxy-lbh7v 1/1 Running 2 62m kube-proxy-vfvzl 1/1 Running 2 66m kube-scheduler-bs-k8s-master02 1/1 Running 6 58m kube-scheduler-bs-k8s-master03 1/1 Running 6 59m kube-scheduler-hs-k8s-master01 1/1 Running 4 66m 测试 [root@hs-k8s-master01 ~]# kubectl run nginx --image=nginx:1.14 --replicas=2 kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead. deployment.apps/nginx created [root@hs-k8s-master01 ~]# kubectl get pods -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES nginx-5cf565498c-q8fzl 1/1 Running 0 112s 10.209.46.65 bs-k8s-node01 <none> <none> nginx-5cf565498c-z2c2m 1/1 Running 0 112s 10.209.208.1 bs-k8s-node03 <none> <none> [root@hs-k8s-master01 ~]# curl 10.209.46.65 <!DOCTYPE html> <html> <head> <title>Welcome to nginx!</title> <style> body { width: 35em; margin: 0 auto; font-family: Tahoma, Verdana, Arial, sans-serif; } </style> </head> <body> <h1>Welcome to nginx!</h1> <p>If you see this page, the nginx web server is successfully installed and working. Further configuration is required.</p> <p>For online documentation and support please refer to <a href="http://nginx.org/">nginx.org</a>.<br/> Commercial support is available at <a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p> </body> </html> #测试dns [root@hs-k8s-master01 ~]# kubectl run curl --image=radial/busyboxplus:curl -it kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead. If you don't see a command prompt, try pressing enter. [ root@curl-69c656fd45-sc55l:/ ]$ nslookup kubernetes.default Server: 10.96.0.10 Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local Name: kubernetes.default Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local
过手如登山，一步一重天
