发布时间：2026-07-21阅读(1)
标签（空格分隔）： Kubernetes架构系列
kubeadmin 安装k8s1.20集群一：k8s1.20.x 的重要更新二：k8s1.20.x 的安装2.1 ：高可用Kubernetes集群规划2.2 yum 的更新配置 （所有节点全部安装）
1、Kubectl debug 设置一个临时容器 2、Sidecar 3、Volume：更改目录权限，fsGroup 4、ConfigMap和Secret K8S官网：https://kubernetes.io/docs/setup/ 最新版高可用安装：https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/high-availability/
k8s 的高可用的架构图
所有节点配置hosts，修改/etc/hosts如下： cat /etc/hosts ---- 192.168.100.11 node01.flyfish.cn 192.168.100.12 node02.flyfish.cn 192.168.100.13 node03.flyfish.cn 192.168.100.14 node04.flyfish.cn 192.168.100.15 node05.flyfish.cn 192.168.100.16 node06.flyfish.cn 192.168.100.17 node07.flyfish.cn 192.168.100.18 node08.flyfish.cn ----
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo yum install -y yum-utils device-mapper-persistent-data lvm2 yum-config-manager --add-repo https://mirrors.aliyun.com/Docker-ce/linux/centos/docker-ce.repo 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 sed -i -e /mirrors.cloud.aliyuncs.com/d -e /mirrors.aliyuncs.com/d /etc/yum.repos.d/CentOS-Base.repo
必备工具安装: yum install wget jq psmisc vim net-tools telnet yum-utils device-mapper-persistent-data lvm2 git -y
所有节点关闭防火墙、selinux、dnsmasq、swap。服务器配置如下： systemctl disable --now firewalld systemctl disable --now dnsmasq systemctl disable --now NetworkManager setenforce 0 sed -i s#SELINUX=enforcing#SELINUX=disabled#g /etc/sysconfig/selinux sed -i s#SELINUX=enforcing#SELINUX=disabled#g /etc/selinux/config
关闭swap分区 (全部节点) swapoff -a && sysctl -w vm.swappiness=0 sed -ri /^[^#]*swap/s@^@#@ /etc/fstab
安装ntpdate rpm -ivh http://mirrors.wlnmp.com/centos/wlnmp-release-centos.noarch.rpm yum install ntpdate -y 所有节点同步时间。时间同步配置如下： ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime echo Asia/Shanghai >/etc/timezone ntpdate time2.aliyun.com 加入到crontab */5 * * * * ntpdate time2.aliyun.com 所有节点配置limit： ulimit -SHn 65535 vim /etc/security/limits.conf # 末尾添加如下内容 * soft nofile 655360 * hard nofile 131072 * soft nproc 655350 * hard nproc 655350 * soft memlock unlimited * hard memlock unlimited
安装ntpdaterpm -ivh http://mirrors.wlnmp.com/centos/wlnmp-release-centos.noarch.rpmyum install ntpdate -y所有节点同步时间。时间同步配置如下：ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtimeecho Asia/Shanghai >/etc/timezonentpdate time2.aliyun.com加入到crontab*/5 * * * * ntpdate time2.aliyun.com所有节点配置limit：ulimit -SHn 65535vim /etc/security/limits.conf# 末尾添加如下内容* soft nofile 655360* hard nofile 131072* soft nproc 655350* hard nproc 655350* soft memlock unlimited* hard memlock unlimitedMaster01节点免密钥登录其他节点：ssh-keygen -t rsafor i in k8s-master01.flyfish.cn k8s-master02.flyfish.cn k8s-master03.flyfish.cn k8s-node01.flyfish.cn k8s-node02.flyfish.cn;do ssh-copy-id -i .ssh/id_rsa.pub $i;done所有节点升级系统并重启：yum update -y && reboot
下载安装源码文件： cd /root/ ; git clone https://github.com/dotbalo/k8s-ha-install.git
CentOS 7安装yum源如下： curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repoyum install -y yum-utils device-mapper-persistent-data lvm2yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repocat <<EOF > /etc/yum.repos.d/kubernetes.repo[kubernetes]name=Kubernetesbaseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/enabled=1gpgcheck=1repo_gpgcheck=1gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpgEOFsed -i -e /mirrors.cloud.aliyuncs.com/d -e /mirrors.aliyuncs.com/d /etc/yum.repos.d/CentOS-Base.repo
CentOS 8 安装源如下：curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repoyum install -y yum-utils device-mapper-persistent-data lvm2yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repocat <<EOF > /etc/yum.repos.d/kubernetes.repo[kubernetes]name=Kubernetesbaseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/enabled=1gpgcheck=1repo_gpgcheck=1gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpgEOFsed -i -e /mirrors.cloud.aliyuncs.com/d -e /mirrors.aliyuncs.com/d /etc/yum.repos.d/CentOS-Base.repo
所有节点升级系统并重启，此处升级没有升级内核，下节会单独升级内核：yum install wget jq psmisc vim net-tools telnet yum-utils device-mapper-persistent-data lvm2 -yyum update -y --exclude=kernel* && reboot #CentOS7需要升级，8不需要
1.1.2 内核配置CentOS7 需要升级内核至4.18 https://www.kernel.org/ 和 https://elrepo.org/linux/kernel/el7/x86_64/CentOS 7 dnf可能无法安装内核dnf --disablerepo=\* --enablerepo=elrepo -y install kernel-ml kernel-ml-develgrubby --default-kernel使用如下方式安装最新版内核rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.orgrpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm查看最新版内核yum --disablerepo="*" --enablerepo="elrepo-kernel" list available[root@k8s-node01 ~]# yum --disablerepo="*" --enablerepo="elrepo-kernel" list availableLoaded plugins: fastestmirrorLoading mirror speeds from cached hostfile * elrepo-kernel: mirrors.neusoft.edu.cnelrepo-kernel | 2.9 kB 00:00:00 elrepo-kernel/primary_db | 1.9 MB 00:00:00 Available Packageselrepo-release.noarch 7.0-5.el7.elrepo elrepo-kernelkernel-lt.x86_64 4.4.229-1.el7.elrepo elrepo-kernelkernel-lt-devel.x86_64 4.4.229-1.el7.elrepo elrepo-kernelkernel-lt-doc.noarch 4.4.229-1.el7.elrepo elrepo-kernelkernel-lt-headers.x86_64 4.4.229-1.el7.elrepo elrepo-kernelkernel-lt-tools.x86_64 4.4.229-1.el7.elrepo elrepo-kernelkernel-lt-tools-libs.x86_64 4.4.229-1.el7.elrepo elrepo-kernelkernel-lt-tools-libs-devel.x86_64 4.4.229-1.el7.elrepo elrepo-kernelkernel-ml.x86_64 5.7.7-1.el7.elrepo elrepo-kernelkernel-ml-devel.x86_64 5.7.7-1.el7.elrepo elrepo-kernelkernel-ml-doc.noarch 5.7.7-1.el7.elrepo elrepo-kernelkernel-ml-headers.x86_64 5.7.7-1.el7.elrepo elrepo-kernelkernel-ml-tools.x86_64 5.7.7-1.el7.elrepo elrepo-kernelkernel-ml-tools-libs.x86_64 5.7.7-1.el7.elrepo elrepo-kernelkernel-ml-tools-libs-devel.x86_64 5.7.7-1.el7.elrepo elrepo-kernelperf.x86_64 5.7.7-1.el7.elrepo elrepo-kernelpython-perf.x86_64 5.7.7-1.el7.elrepo elrepo-kernel安装最新版：yum --enablerepo=elrepo-kernel install kernel-ml kernel-ml-devel –y安装完成后reboot更改内核顺序：grub2-set-default 0 && grub2-mkconfig -o /etc/grub2.cfg && grubby --args="user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)" && reboot开机后查看内核[appadmin@k8s-node01 ~]$ uname -aLinux k8s-node01 5.7.7-1.el7.elrepo.x86_64 #1 SMP Wed Jul 1 11:53:16 EDT 2020 x86_64 x86_64 x86_64 GNU/LinuxCentOS 8按需升级:可以采用dnf升级，也可使用上述同样步骤升级（使用上述步骤注意elrepo-release-8.1版本）rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.orgdnf install https://www.elrepo.org/elrepo-release-8.1-1.el8.elrepo.noarch.rpmdnf --disablerepo=\* --enablerepo=elrepo -y install kernel-ml kernel-ml-develgrubby --default-kernel && reboot
安装依赖包： 本所有节点安装ipvsadm：yum install ipvsadm ipset sysstat conntrack libseccomp -y所有节点配置ipvs模块，在内核4.19 版本nf_conntrack_ipv4已经改为nf_conntrack，本例安装的内核为4.18，使用nf_conntrack_ipv4即可：modprobe -- ip_vsmodprobe -- ip_vs_rrmodprobe -- ip_vs_wrrmodprobe -- ip_vs_shmodprobe -- nf_conntrack_ipv4cat /etc/modules-load.d/ipvs.conf ip_vsip_vs_rrip_vs_wrrip_vs_shnf_conntrack_ipv4ip_tablesip_setxt_setipt_setipt_rpfilteript_REJECTipip然后执行systemctl enable --now systemd-modules-load.service即可
开启一些k8s集群中必须的内核参数，所有节点配置k8s内核： cat <<EOF > /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 = 16384EOFsysctl --system
1.1.3 基本组件安装本节主要安装的是集群中用到的各种组件，比如docker-ce、Kubernetes各组件等。查看可用docker-ce版本：yum list docker-ce.x86_64 --showduplicates | sort -r[root@k8s-master01 k8s-ha-install]# wget https://download.docker.com/linux/centos/7/x86_64/edge/Packages/containerd.io-1.2.13-3.2.el7.x86_64.rpm 安装 docker-ce 19.03 版本：yum install -y docker-ce-cli-19.03.8-3.el7.x86_64 docker-ce-19.03.8-3.el7.x86_64
温馨提示：由于新版kubelet建议使用systemd，所以可以把docker的CgroupDriver改成systemdcat > /etc/docker/daemon.json <<EOF{ "exec-opts": ["native.cgroupdriver=systemd"]}EOF
启动docker service docker startchkconfig docker on
安装k8s组件：yum list kubeadm.x86_64 --showduplicates | sort -r所有节点安装最新版本kubeadm：yum install kubeadm -y所有节点安装指定版本k8s组件：yum install -y kubeadm-1.20.5-0.x86_64 kubectl-1.20.5-0.x86_64 kubelet-1.20.5-0.x86_64所有节点设置开机自启动Docker：systemctl daemon-reload && systemctl enable --now docker默认配置的pause镜像使用gcr.io仓库，国内可能无法访问，所以这里配置Kubelet使用阿里云的pause镜像：DOCKER_CGROUPS=$(docker info | grep Cgroup | cut -d -f4)cat >/etc/sysconfig/kubelet<<EOFKUBELET_EXTRA_ARGS="--cgroup-driver=$DOCKER_CGROUPS --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1"EOF
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设置Kubelet开机自启动：systemctl daemon-reloadsystemctl enable --now kubelet
1.1.4 高可用组件安装所有Master节点通过yum安装HAProxy和KeepAlived：yum install keepalived haproxy -y
所有Master节点配置HAProxy（详细配置参考HAProxy文档，所有Master节点的HAProxy配置相同）：[root@k8s-master01 etc]# mkdir /etc/haproxy[root@k8s-master01 etc]# vim /etc/haproxy/haproxy.cfg global maxconn 2000 ulimit-n 16384 log 127.0.0.1 local0 err stats timeout 30sdefaults log global mode http option httplog timeout connect 5000 timeout client 50000 timeout server 50000 timeout http-request 15s timeout http-keep-alive 15sfrontend monitor-in bind *:33305 mode http option httplog monitor-uri /monitorlisten stats bind *:8006 mode http stats enable stats hide-version stats uri /stats stats refresh 30s stats realm Haproxy\ Statistics stats auth admin:adminfrontend k8s-master bind 0.0.0.0:16443 bind 127.0.0.1:16443 mode tcp option tcplog tcp-request inspect-delay 5s default_backend k8s-masterbackend k8s-master mode tcp option tcplog option tcp-check balance roundrobin default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100 server node01.flyfish.cn 192.168.100.11:6443 check server node02.flyfish.cn 192.168.100.12:6443 check server node03.flyfish.cn 192.168.100.13:6443 check ---- 三台机器的配置是一样的： scp haproxy.cfg root@node02.flyfish.cn:/etc/haproxy/ scp haproxy.cfg root@node03.flyfish.cn:/etc/haproxy/
Master01节点的配置：[root@k8s-master01 etc]# mkdir /etc/keepalived[root@k8s-master01 ~]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalivedglobal_defs { router_id LVS_DEVEL}vrrp_script chk_apiserver { script "/etc/keepalived/check_apiserver.sh" interval 2 weight -5 fall 3 rise 2}vrrp_instance VI_1 { state MASTER interface ens33 mcast_src_ip 192.168.100.11 virtual_router_id 51 priority 100 advert_int 2 authentication { auth_type PASS auth_pass K8SHA_KA_AUTH } virtual_ipaddress { 192.168.100.200 } track_script { chk_apiserver }}
Master02节点的配置：! Configuration File for keepalivedglobal_defs { router_id LVS_DEVEL}vrrp_script chk_apiserver { script "/etc/keepalived/check_apiserver.sh" interval 2 weight -5 fall 3 rise 2}vrrp_instance VI_1 { state BACKUP interface ens33 mcast_src_ip 192.168.100.12 virtual_router_id 51 priority 101 advert_int 2 authentication { auth_type PASS auth_pass K8SHA_KA_AUTH } virtual_ipaddress { 192.168.100.200 } track_script { chk_apiserver }}
Master03节点的配置：! Configuration File for keepalivedglobal_defs { router_id LVS_DEVEL}vrrp_script chk_apiserver { script "/etc/keepalived/check_apiserver.sh" interval 2 weight -5 fall 3 rise 2}vrrp_instance VI_1 { state BACKUP interface ens33 mcast_src_ip 192.168.100.13 virtual_router_id 51 priority 102 advert_int 2 authentication { auth_type PASS auth_pass K8SHA_KA_AUTH } virtual_ipaddress { 192.168.100.200 } track_script { chk_apiserver }}注意上述的健康检查是关闭的，集群建立完成后再开启： track_script { chk_apiserver }
配置KeepAlived健康检查文件：[root@k8s-master01 keepalived]# cat /etc/keepalived/check_apiserver.sh #!/bin/basherr=0for k in $(seq 1 5)do check_code=$(pgrep kube-apiserver) if [[ $check_code == "" ]]; then err=$(expr $err 1) sleep 5 continue else err=0 break fidoneif [[ $err != "0" ]]; then echo "systemctl stop keepalived" /usr/bin/systemctl stop keepalived exit 1else exit 0fi
启动haproxy和keepalived (所有master 启动)[root@k8s-master01 keepalived]# systemctl enable --now haproxy[root@k8s-master01 keepalived]# systemctl enable --now keepalived
集群初始化：https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/high-availability/
各Master节点的kubeadm-config.yaml配置文件如下：Master01：daocloud.io/daocloud-----apiVersion: kubeadm.k8s.io/v1beta2bootstrapTokens:- groups: - system:bootstrappers:kubeadm:default-node-token token: 7t2weq.bjbawausm0jaxury ttl: 24h0m0s usages: - signing - authenticationkind: InitConfigurationlocalAPIEndpoint: advertiseAddress: 192.168.100.11 bindPort: 6443nodeRegistration: criSocket: /var/run/dockershim.sock name: node01.flyfish.cn taints: - effect: NoSchedule key: node-role.kubernetes.io/master---apiServer: certSANs: - 192.168.100.200 timeoutForControlPlane: 4m0sapiVersion: kubeadm.k8s.io/v1beta2certificatesDir: /etc/kubernetes/pkiclusterName: kubernetescontrolPlaneEndpoint: 192.168.100.200:16443controllerManager: {}dns: type: CoreDNSetcd: local: dataDir: /var/lib/etcdimageRepository: registry.cn-hangzhou.aliyuncs.com/google_containerskind: ClusterConfigurationkubernetesVersion: v1.20.5networking: dnsDomain: cluster.local podSubnet: 172.168.100.0/16 serviceSubnet: 10.96.0.0/12scheduler: {}----
更新kubeadm文件kubeadm config migrate --old-config kubeadm-config.yaml --new-config new.yaml所有Master节点提前下载镜像，可以节省初始化时间：(master 节点)kubeadm config images pull --config /root/new.yaml所有节点设置开机自启动kubeletsystemctl enable --now kubelet
Master01节点初始化，初始化以后会在/etc/kubernetes目录下生成对应的证书和配置文件，之后其他Master节点加入Master01即可：kubeadm init --config /root/kubeadm-config.yaml --upload-certs不用配置文件初始化：kubeadm init --control-plane-endpoint "LOAD_BALANCER_DNS:LOAD_BALANCER_PORT" --upload-certs
初始化失败报错 error execution phase upload-config/kubelet: Error writing Crisocket information for the control-plane node: timed out waiting for the conditionTo see the stack trace of this error execute with --v=5 or higher
解决方法： 所有主机停掉kubelet service kubelet stop 执行命令： swapoff -a && kubeadm reset && systemctl daemon-reload && systemctl restart kubelet && iptables -F && iptables -t nat -F && iptables -t mangle -F && iptables -X ipvsadm --clear
再次初始化： kubeadm init --config /root/new.yaml --upload-certs
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/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/You can now join any number of the control-plane node running the following command on each as root: kubeadm join 192.168.100.200:16443 --token 7t2weq.bjbawausm0jaxury \ --discovery-token-ca-cert-hash sha256:7263545b1a028e6217ff4e55712bf24422e6d9aeba54e76daabfc8a824ffcd99 \ --control-plane --certificate-key c0b3b67c42f4fe9ae2832d86f80df35ee2e7b32f945906fabe60e4ae1f4ba18fPlease note that the certificate-key gives access to cluster sensitive data, keep it secret!As a safeguard, uploaded-certs will be deleted in two hours; If necessary, you can use"kubeadm init phase upload-certs --upload-certs" to reload certs afterward.Then you can join any number of worker nodes by running the following on each as root:kubeadm join 192.168.100.200:16443 --token 7t2weq.bjbawausm0jaxury \ --discovery-token-ca-cert-hash sha256:7263545b1a028e6217ff4e55712bf24422e6d9aeba54e76daabfc8a824ffcd99
mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config
所有Master节点配置环境变量，用于访问Kubernetes集群：cat <<EOF >> /root/.bashrcexport KUBECONFIG=/etc/kubernetes/admin.confEOFsource /root/.bashrc查看节点状态：[root@k8s-master01 ~]# kubectl get nodesNAME STATUS ROLES AGE VERSIONk8s-master01 NotReady master 14m v1.12.3采用初始化安装方式，所有的系统组件均以容器的方式运行并且在kube-system命名空间内，此时可以查看Pod状态：
其他master 加入集群： kubeadm join 192.168.100.200:16443 --token 7t2weq.bjbawausm0jaxury \ --discovery-token-ca-cert-hash sha256:7263545b1a028e6217ff4e55712bf24422e6d9aeba54e76daabfc8a824ffcd99 \ --control-plane --certificate-key c0b3b67c42f4fe9ae2832d86f80df35ee2e7b32f945906fabe60e4ae1f4ba18f
mkdir -p $HOME/.kubesudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/configsudo chown $(id -u):$(id -g) $HOME/.kube/config
加master节点报错 [ERROR DirAvailable--var-lib-etcd]: /var/lib/etcd is not empty[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`To see the stack trace of this error execute with --v=5 or higher
rm -rf /var/lib/etcd
在初始化： kubeadm join 192.168.100.200:16443 --token 7t2weq.bjbawausm0jaxury \ --discovery-token-ca-cert-hash sha256:7263545b1a028e6217ff4e55712bf24422e6d9aeba54e76daabfc8a824ffcd99 \ --control-plane --certificate-key c0b3b67c42f4fe9ae2832d86f80df35ee2e7b32f945906fabe60e4ae1f4ba18f
mkdir -p $HOME/.kubesudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/configsudo chown $(id -u):$(id -g) $HOME/.kube/config
kubectl get node
node 节点加入： kubeadm join 192.168.100.200:16443 --token 7t2weq.bjbawausm0jaxury \ --discovery-token-ca-cert-hash sha256:7263545b1a028e6217ff4e55712bf24422e6d9aeba54e76daabfc8a824ffcd99
Token过期后生成新的token：(集群扩容与缩容的问题)kubeadm token create --print-join-command -----kubeadm join 192.168.100.200:16443 --token p6rvkq.0joqbi5bxnd12n20 --discovery-token-ca-cert-hash sha256:7263545b1a028e6217ff4e55712bf24422e6d9aeba54e76daabfc8a824ffcd99-----Master需要生成--certificate-keykubeadm init phase upload-certs --upload-certs-----[upload-certs] Storing the certificates in Secret "kubeadm-certs" in the "kube-system" Namespace[upload-certs] Using certificate key:c97af03609a9d3c099dd07615ce170a8f0c8db368f36e10a79576f9efcc0857e----初始化其他master加入集群 kubeadm join 192.168.100.200:16443 --token p6rvkq.0joqbi5bxnd12n20 --discovery-token-ca-cert-hash sha256:7263545b1a028e6217ff4e55712bf24422e6d9aeba54e76daabfc8a824ffcd99 --control-plane --certificate-key c97af03609a9d3c099dd07615ce170a8f0c8db368f36e10a79576f9efcc0857e
查看token的过期时间 kubectl get secret -n kube-system -o wide
kubectl get secret -n kube-system bootstrap-token-q8soir -o yaml-----apiVersion: v1data: description: UHJveHkgZm9yIG1hbmFnaW5nIFRUTCBmb3IgdGhlIGt1YmVhZG0tY2VydHMgc2VjcmV0 expiration: MjAyMS0wMy0yNlQxODoyMzowNSswODowMA== token-id: cThzb2ly token-secret: cnZidjZwdGIxajIxbWFsZw==kind: Secretmetadata: creationTimestamp: "2021-03-26T08:23:05Z" managedFields: - apiVersion: v1 fieldsType: FieldsV1 fieldsV1: f:data: .: {} f:description: {} f:expiration: {} f:token-id: {} f:token-secret: {} f:type: {} manager: kubeadm operation: Update time: "2021-03-26T08:23:05Z" name: bootstrap-token-q8soir namespace: kube-system resourceVersion: "305" uid: eba712c8-386e-4824-802e-7a2f5cd05f0ctype: bootstrap.kubernetes.io/token----
echo MjAyMS0wMy0yNlQxODoyMzowNSswODowMA== |base64 -d
kubectl get node
修改calico-etcd.yaml的以下位置 cd /root/k8s-ha-install && git checkout manual-installation-v1.20.x && cd calico/-----sed -i s#etcd_endpoints: "http://<ETCD_IP>:<ETCD_PORT>"#etcd_endpoints: "https://192.168.100.11:2379,https://192.168.100.12:2379,https://192.168.100.13:2379"#g calico-etcd.yamlETCD_CA=`cat /etc/kubernetes/pki/etcd/ca.crt | base64 | tr -d \n`ETCD_CERT=`cat /etc/kubernetes/pki/etcd/server.crt | base64 | tr -d \n`ETCD_KEY=`cat /etc/kubernetes/pki/etcd/server.key | base64 | tr -d \n`sed -i "s@# etcd-key: null@etcd-key: ${ETCD_KEY}@g; s@# etcd-cert: null@etcd-cert: ${ETCD_CERT}@g; s@# etcd-ca: null@etcd-ca: ${ETCD_CA}@g" calico-etcd.yamlsed -i s#etcd_ca: ""#etcd_ca: "/calico-secrets/etcd-ca"#g; s#etcd_cert: ""#etcd_cert: "/calico-secrets/etcd-cert"#g; s#etcd_key: "" #etcd_key: "/calico-secrets/etcd-key" #g calico-etcd.yamlPOD_SUBNET=`cat /etc/kubernetes/manifests/kube-controller-manager.yaml | grep cluster-cidr= | awk -F= {print $NF}`sed -i s@# - name: CALICO_IPV4POOL_CIDR@- name: CALICO_IPV4POOL_CIDR@g; s@# value: "192.168.0.0/16"@ value: "${POD_SUBNET}"@g calico-etcd.yaml-----kubectl apply -f calico-etcd.yamlkubectl get node -n kue-system kubectl get node
配置metric server cd /root/k8s-ha-install/metrics-server-0.4.x-kubeadmvim comp.ymal----apiVersion: v1kind: ServiceAccountmetadata: labels: k8s-app: metrics-server name: metrics-server namespace: kube-system---apiVersion: rbac.authorization.k8s.io/v1kind: ClusterRolemetadata: 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-readerrules: - apiGroups: - metrics.k8s.io resources: - pods - nodes verbs: - get - list - watch---apiVersion: rbac.authorization.k8s.io/v1kind: ClusterRolemetadata: labels: k8s-app: metrics-server name: system:metrics-serverrules: - apiGroups: - "" resources: - pods - nodes - nodes/stats - namespaces - configmaps verbs: - get - list - watch---apiVersion: rbac.authorization.k8s.io/v1kind: RoleBindingmetadata: labels: k8s-app: metrics-server name: metrics-server-auth-reader namespace: kube-systemroleRef: apiGroup: rbac.authorization.k8s.io kind: Role name: extension-apiserver-authentication-readersubjects: - kind: ServiceAccount name: metrics-server namespace: kube-system---apiVersion: rbac.authorization.k8s.io/v1kind: ClusterRoleBindingmetadata: labels: k8s-app: metrics-server name: metrics-server:system:auth-delegatorroleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:auth-delegatorsubjects: - kind: ServiceAccount name: metrics-server namespace: kube-system---apiVersion: rbac.authorization.k8s.io/v1kind: ClusterRoleBindingmetadata: labels: k8s-app: metrics-server name: system:metrics-serverroleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:metrics-serversubjects: - kind: ServiceAccount name: metrics-server namespace: kube-system---apiVersion: v1kind: Servicemetadata: labels: k8s-app: metrics-server name: metrics-server namespace: kube-systemspec: ports: - name: https port: 443 protocol: TCP targetPort: https selector: k8s-app: metrics-server---apiVersion: apps/v1kind: Deploymentmetadata: labels: k8s-app: metrics-server name: metrics-server namespace: kube-systemspec: 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=4443 - --metric-resolution=30s - --kubelet-insecure-tls - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname # - --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.crt # change to front-proxy-ca.crt for kubeadm - --requestheader-username-headers=X-Remote-User - --requestheader-group-headers=X-Remote-Group - --requestheader-extra-headers-prefix=X-Remote-Extra- image: registry.cn-beijing.aliyuncs.com/dotbalo/metrics-server:v0.4.1 imagePullPolicy: IfNotPresent livenessProbe: failureThreshold: 3 httpGet: path: /livez port: https scheme: HTTPS periodSeconds: 10 name: metrics-server ports: - containerPort: 4443 name: https protocol: TCP readinessProbe: failureThreshold: 3 httpGet: path: /readyz port: https scheme: HTTPS periodSeconds: 10 securityContext: readOnlyRootFilesystem: true runAsNonRoot: true runAsUser: 1000 volumeMounts: - mountPath: /tmp name: tmp-dir - name: ca-ssl mountPath: /etc/kubernetes/pki nodeSelector: kubernetes.io/os: linux priorityClassName: system-cluster-critical serviceAccountName: metrics-server volumes: - emptyDir: {} name: tmp-dir - name: ca-ssl hostPath: path: /etc/kubernetes/pki---apiVersion: apiregistration.k8s.io/v1kind: APIServicemetadata: labels: k8s-app: metrics-server name: v1beta1.metrics.k8s.iospec: group: metrics.k8s.io groupPriorityMinimum: 100 insecureSkipTLSVerify: true service: name: metrics-server namespace: kube-system version: v1beta1 versionPriority: 100----kubectl apply -f comp.yaml
安装dashbaord cd /root/k8s-ha-install/dashboardkubectl apply -f dashboard-user.yamlkubectl apply -f dashboard.yamlkubectl get pod -n kubernetes-dashboard
kubectl edit svc kubernetes-dashboard -n kubernetes-dashboard改一下svc 的 类型： type: Cluster-IP 改为： type: NodePort
kubectl get svc -n kubernetes-dashboard -o wide
kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk {print $1})
集群测试： kubectl get svc -n kube-system telnet 10.96.0.1 443 telnet 10.96.0.10 53
部署kuborad 在node 节点上面 下载镜像： docker pull eipwork/kuboard:latest kubectl apply -f https://kuboard.cn/install-script/kuboard.yaml kubectl get pods -l k8s.kuboard.cn/name=kuboard -n kube-system kubectl get svc,pod -n kube-system -o wide |grep kuboard
获取Token# 如果您参考 www.kuboard.cn 提供的文档安装 Kuberenetes，可在第一个 Master 节点上执行此命令echo $(kubectl -n kube-system get secret $(kubectl -n kube-system get secret | grep kuboard-user | awk {print $1}) -o go-template={{.data.token}} | base64 -d)
卸载：kuborad-v2 kubectl delete -f https://kuboard.cn/install-script/kuboard.yaml
安装kuboard-v3在node 节点上面下载镜像：docker pull eipwork/kuboard:v3docker pull eipwork/etcd-host:3.4.16-1mkdir /datachmod 777 -R /data配置镜像下载策略wget https://addons.kuboard.cn/kuboard/kuboard-v3.yamlvim kuboard-v3.ymal---imagePullPolicy: IfNotPresent (共有两处)---kubectl apply -f kuboard-v3.yaml
访问 Kuboard在浏览器中打开链接 http://your-node-ip-address:30080输入初始用户名和密码，并登录用户名： admin密码： Kuboard123
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