Kubernetes1.18.18 集群部署 标签（空格分隔）： kubernetes升级系列 [toc] 一：环境初始化准备 1.1 环境信息 系统：CentOS7.9x64主机名：cat /etc/hosts-----192.168.3.171 t-k8sM-001192.168.3.172 t-k8sM-002192.168
Kubernetes1.18.18 集群部署
标签（空格分隔）： kubernetes升级系列
[toc]
一：环境初始化准备
1.1 环境信息
系统：CentOS7.9x64 主机名： cat /etc/hosts ----- 192.168.3.171 t-k8sM-001 192.168.3.172 t-k8sM-002 192.168.3.173 t-k8sM-003 192.168.3.174 t-k8sN-001 192.168.3.175 t-k8sN-002 ------1.2 环境部署需求
1.2.1 单Master架构图：
1.2.2 部署角色分配
t-k8sM-001 ---> apiserver/controller-manager/scheduer/etcd t-k8sM-002 ---> apiserver/controller-manager/scheduer/etcd t-k8sM-003 ---> apiserver/controller-manager/scheduer/etcd t-k8sN-001 ----> docker/kubelet/kube-proxy/etcd/ t-k8sN-002 ----> docker/kubelet/kube-proxy/etcd/1.2.3 系统初始化
# 关闭防火墙 systemctl stop firewalld systemctl disable firewalld # 关闭selinux sed -i 's/enforcing/disabled/' /etc/selinux/config # 永久 setenforce 0 # 临时 # 关闭swap swapoff -a # 临时 sed -ri 's/.*swap.*/#&/' /etc/fstab # 永久 # 根据规划设置主机名 hostnamectl set-hostname <hostname> # 在master添加hosts cat >> /etc/hosts << EOF 192.168.3.171 t-k8sM-001 192.168.3.172 t-k8sM-002 192.168.3.173 t-k8sM-003 192.168.3.174 t-k8sN-001 192.168.3.175 t-k8sN-002 EOF # 将桥接的IPv4流量传递到iptables的链 cat > /etc/sysctl.d/k8s.conf << EOF net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 EOF sysctl --system # 生效 # 时间同步 yum install chronyd server ntp1.aliyun.com##二：ETCD 环境部署
2.1 etcd 介绍
Etcd 的概念： Etcd 是一个分布式键值存储系统，Kubernetes使用Etcd进行数据存储，所以先准备一个Etcd数据库，为解决Etcd单点故障，应采用集群方式部署，这里使用3台组建集群，可容忍1台机器故障，当然，你也可以使用5台组建集群，可容忍2台机器故障。2.2 部署etcd集群
2.2.1 自签名ETCD 证书
cfssl是一个开源的证书管理工具，使用json文件生成证书，相比openssl更方便使用。 找任意一台服务器操作，这里用Master节点。 --- wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64 mv cfssl_linux-amd64 /usr/bin/cfssl mv cfssljson_linux-amd64 /usr/bin/cfssljson mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo 1. 自签证书颁发机构（CA） 创建工作目录： mkdir -p ~/TLS/{etcd,k8s} cd TLS/etcd --- 自签CA： cat > ca-config.json << EOF { "signing": { "default": { "expiry": "87600h" }, "profiles": { "www": { "expiry": "87600h", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } } } EOF cat > ca-csr.json << EOF { "CN": "etcd CA", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing" } ] } EOF --- cfssl gencert -initca ca-csr.json | cfssljson -bare ca - 2. 使用自签CA签发Etcd HTTPS证书 创建证书申请文件： cat > server-csr.json << EOF { "CN": "etcd", "hosts": [ "192.168.3.171", "192.168.3.172", "192.168.3.173", "192.168.3.174", "192.168.3.175", "192.168.3.176", "192.168.3.177", "192.168.3.178", "192.168.3.179", "192.168.3.180", "192.168.3.181", "192.168.3.182", "192.168.3.183", "192.168.3.184", "192.168.3.185", "192.168.3.186", "192.168.3.187", "192.168.3.188", "192.168.3.189", "192.168.3.201" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing" } ] } EOF 生成证书： cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server ls server*pem server-key.pem server.pem2.2.2下载安装etcd
下载地址：https://github.com/etcd-io/etcd/releases/download/v3.4.14/etcd-v3.4.14-linux-amd64.tar.gz 以下在节点1上操作，为简化操作，待会将节点1生成的所有文件拷贝到节点2和节点3.1. 创建工作目录并解压二进制包 mkdir /data/application/etcd/{bin,cfg,ssl} -p tar zxvf etcd-v3.4.14-linux-amd64.tar.gz mv etcd-v3.4.14-linux-amd64/{etcd,etcdctl} /data/application/etcd/bin/ 创建etcd配置文件 cat > /data/application/etcd/cfg/etcd.conf << EOF #[Member] ETCD_NAME="etcd-1" ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.3.171:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.3.171:2379" #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.3.171:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.3.171:2379" ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.3.171:2380,etcd-2=https://192.168.3.172:2380,etcd-3=https://192.168.3.173:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" EOF ---- ETCD_NAME：节点名称，集群中唯一 ETCD_DATA_DIR：数据目录 ETCD_LISTEN_PEER_URLS：集群通信监听地址 ETCD_LISTEN_CLIENT_URLS：客户端访问监听地址 ETCD_INITIAL_ADVERTISE_PEER_URLS：集群通告地址 ETCD_ADVERTISE_CLIENT_URLS：客户端通告地址 ETCD_INITIAL_CLUSTER：集群节点地址 ETCD_INITIAL_CLUSTER_TOKEN：集群Token ETCD_INITIAL_CLUSTER_STATE：加入集群的当前状态，new是新集群，existing表示加入已有集群 -----
systemd管理etcd 启动文件 cat > /usr/lib/systemd/system/etcd.service << EOF [Unit] Description=Etcd Server After=network.target After=network-online.target Wants=network-online.target [Service] Type=notify EnvironmentFile=/data/application/etcd/cfg/etcd.conf ExecStart=/data/application/etcd/bin/etcd \ --cert-file=/data/application/etcd/ssl/server.pem \ --key-file=/data/application/etcd/ssl/server-key.pem \ --peer-cert-file=/data/application/etcd/ssl/server.pem \ --peer-key-file=/data/application/etcd/ssl/server-key.pem \ --trusted-ca-file=/data/application/etcd/ssl/ca.pem \ --peer-trusted-ca-file=/data/application/etcd/ssl/ca.pem \ --logger=zap Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF
拷贝刚才生成的证书 把刚才生成的证书拷贝到配置文件中的路径： cp ~/TLS/etcd/ca*pem ~/TLS/etcd/server*pem /data/application/etcd/ssl/ 同步所有节点： scp -P36022 -r /data/application/etcd/ root@192.168.3.172:/data/application/ scp -P36022 /usr/lib/systemd/system/etcd.service root@192.168.3.172:/usr/lib/systemd/system/ scp -P36022 -r /data/application/etcd/ root@192.168.3.173:/opt/application/ scp -P36022 /usr/lib/systemd/system/etcd.service root@192.168.3.173:/usr/lib/systemd/system/ 然后在节点2和节点3分别修改etcd.conf配置文件中的节点名称和当前服务器IP： vi /opt/etcd/cfg/etcd.conf #[Member] ETCD_NAME="etcd-1" # 修改此处，节点2改为etcd-2，节点3改为etcd-3 ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.3.171:2380" # 修改此处为当前服务器IP ETCD_LISTEN_CLIENT_URLS="https://192.168.3.171:2379" # 修改此处为当前服务器IP #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.3.171:2380" # 修改此处为当前服务器IP ETCD_ADVERTISE_CLIENT_URLS="https://192.168.3.171:2379" # 修改此处为当前服务器IP ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.3.171:2380,etcd-2=https://192.168.3.172:2380,etcd-3=https://192.168.3.173:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new"
启动etcd 同步所有启动所有节点： systemctl daemon-reload systemctl start etcd systemctl enable etcd
测试： ETCDCTL_API=3 /data/application/etcd/bin/etcdctl --cacert=/data/application/etcd/ssl/ca.pem --cert=/data/application/etcd/ssl/server.pem --key=/data/application/etcd/ssl/server-key.pem --endpoints="https://192.168.3.171:2379,https://192.168.3.172:2379,https://192.168.3.173:2379" endpoint health
三 部署kubernetes集群
3.1 部署k8s的Master Node
生成kube-apiserver证书 1. 自签证书颁发机构（CA） cd /root/TLS/k8s/ --- cat > ca-config.json << EOF { "signing": { "default": { "expiry": "87600h" }, "profiles": { "kubernetes": { "expiry": "87600h", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } } } EOF cat > ca-csr.json << EOF { "CN": "kubernetes", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing", "O": "k8s", "OU": "System" } ] } EOF生成证书： cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
使用自签CA签发kube-apiserver HTTPS证书 创建证书申请文件： cat > server-csr.json << EOF { "CN": "kubernetes", "hosts": [ "10.0.0.1", "127.0.0.1", "192.168.3.171", "192.168.3.172", "192.168.3.173", "192.168.3.174", "192.168.3.175", "192.168.3.176", "192.168.3.177", "192.168.3.178", "192.168.3.179", "192.168.3.180", "192.168.3.181", "192.168.3.182", "192.168.3.183", "192.168.3.184", "192.168.3.185", "192.168.3.186", "192.168.3.187", "192.168.3.188", "192.168.3.189", "192.168.3.201", "kubernetes", "kubernetes.default", "kubernetes.default.svc", "kubernetes.default.svc.cluster", "kubernetes.default.svc.cluster.local" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing", "O": "k8s", "OU": "System" } ] } EOF 注：上述文件hosts字段中IP为所有Master/LB/VIP IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP。
生成证书： cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server k8s 的下载安装 从Github下载二进制文件 下载地址： https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.18.md#v1183 注：打开链接你会发现里面有很多包，下载一个server包就够了，包含了Master和Worker Node二进制文件。 解压二进制包 mkdir -p /data/application/kubernetes/{bin,cfg,ssl,logs} tar zxvf kubernetes-server-linux-amd64.tar.gz cd kubernetes/server/bin cp kube-apiserver kube-scheduler kube-controller-manager /data/application/kubernetes/bin cp kubectl /usr/bin/ 部署apiserver 部署kube-apiserver 1. 创建配置文件 cat > /data/application/kubernetes/cfg/kube-apiserver.conf << EOF KUBE_APISERVER_OPTS="--logtostderr=false \\ --v=2 \\ --log-dir=/data/application/kubernetes/logs \\ --etcd-servers=https://192.168.3.171:2379,https://192.168.3.172:2379,https://192.168.3.173:2379 \\ --bind-address=192.168.3.171 \\ --secure-port=6443 \\ --advertise-address=192.168.3.171 \\ --allow-privileged=true \\ --service-cluster-ip-range=10.0.0.0/16 \\ --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \\ --authorization-mode=RBAC,Node \\ --enable-bootstrap-token-auth=true \\ --token-auth-file=/data/application/kubernetes/cfg/token.csv \\ --service-node-port-range=30000-32767 \\ --kubelet-client-certificate=/data/application/kubernetes/ssl/server.pem \\ --kubelet-client-key=/data/application/kubernetes/ssl/server-key.pem \\ --tls-cert-file=/data/application/kubernetes/ssl/server.pem \\ --tls-private-key-file=/data/application/kubernetes/ssl/server-key.pem \\ --client-ca-file=/data/application/kubernetes/ssl/ca.pem \\ --service-account-key-file=/data/application/kubernetes/ssl/ca-key.pem \\ --etcd-cafile=/data/application/etcd/ssl/ca.pem \\ --etcd-certfile=/data/application/etcd/ssl/server.pem \\ --etcd-keyfile=/data/application/etcd/ssl/server-key.pem \\ --audit-log-maxage=30 \\ --audit-log-maxbackup=3 \\ --audit-log-maxsize=100 \\ --audit-log-path=/data/application/kubernetes/logs/k8s-audit.log" EOF
拷贝刚才生成的证书 把刚才生成的证书拷贝到配置文件中的路径： cp ~/TLS/k8s/ca*pem ~/TLS/k8s/server*pem /data/application/kubernetes/ssl/
启用 TLS Bootstrapping 机制 TLS Bootstraping：Master apiserver启用TLS认证后，Node节点kubelet和kube-proxy要与kube-apiserver进行通信，必须使用CA签发的有效证书才可以，当Node节点很多时，这种客户端证书颁发需要大量工作，同样也会增加集群扩展复杂度。为了简化流程，Kubernetes引入了TLS bootstraping机制来自动颁发客户端证书，kubelet会以一个低权限用户自动向apiserver申请证书，kubelet的证书由apiserver动态签署。所以强烈建议在Node上使用这种方式，目前主要用于kubelet，kube-proxy还是由我们统一颁发一个证书。 TLS bootstraping 工作流程： 创建上述配置文件中token文件： cat > /data/application/kubernetes/cfg/token.csv << EOF c47ffb939f5ca36231d9e3121a252940,kubelet-bootstrap,10001,"system:node-bootstrapper" EOF systemd管理apiserver cat > /usr/lib/systemd/system/kube-apiserver.service << EOF [Unit] Description=Kubernetes API Server Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=/data/application/kubernetes/cfg/kube-apiserver.conf ExecStart=/data/application/kubernetes/bin/kube-apiserver \$KUBE_APISERVER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target EOF 启动并设置开机启动 systemctl daemon-reload systemctl start kube-apiserver systemctl enable kube-apiserver 授权kubelet-bootstrap用户允许请求证书 kubectl create clusterrolebinding kubelet-bootstrap \ --clusterrole=system:node-bootstrapper \ --user=kubelet-bootstrap 部署kube-controller-manager 创建配置文件 cat > /data/application/kubernetes/cfg/kube-controller-manager.conf << EOF KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \\ --v=2 \\ --log-dir=/data/application/kubernetes/logs \\ --leader-elect=true \\ --master=127.0.0.1:8080 \\ --bind-address=127.0.0.1 \\ --allocate-node-cidrs=true \\ --cluster-cidr=10.244.0.0/16 \\ --service-cluster-ip-range=10.0.0.0/16 \\ --cluster-signing-cert-file=/data/application/kubernetes/ssl/ca.pem \\ --cluster-signing-key-file=/data/application/kubernetes/ssl/ca-key.pem \\ --root-ca-file=/data/application/kubernetes/ssl/ca.pem \\ --service-account-private-key-file=/data/application/kubernetes/ssl/ca-key.pem \\ --experimental-cluster-signing-duration=87600h0m0s" EOF
systemd管理controller-manager cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF [Unit] Description=Kubernetes Controller Manager Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=/data/application/kubernetes/cfg/kube-controller-manager.conf ExecStart=/data/application/kubernetes/bin/kube-controller-manager \$KUBE_CONTROLLER_MANAGER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target EOF 启动并设置开机启动 systemctl daemon-reload systemctl start kube-controller-manager systemctl enable kube-controller-manager
部署kube-scheduler 1. 创建配置文件 cat > /data/application/kubernetes/cfg/kube-scheduler.conf << EOF KUBE_SCHEDULER_OPTS="--logtostderr=false \ --v=2 \ --log-dir=/data/application/kubernetes/logs \ --leader-elect \ --master=127.0.0.1:8080 \ --bind-address=127.0.0.1" EOF
systemd管理scheduler cat > /usr/lib/systemd/system/kube-scheduler.service << EOF [Unit] Description=Kubernetes Scheduler Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=/data/application/kubernetes/cfg/kube-scheduler.conf ExecStart=/data/application/kubernetes/bin/kube-scheduler \$KUBE_SCHEDULER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target EOF
启动并设置开机启动 systemctl daemon-reload systemctl start kube-scheduler systemctl enable kube-scheduler
查看集群状态： kubectl get cs
3.2 部署node 节点
t-k8sN-001 节点部署docker: 下载地址：https://download.docker.com/linux/static/stable/x86_64/docker-20.10.3.tgz 以下在所有节点操作。这里采用二进制安装，用yum安装也一样。 t-k8sN-001 与 t-k8sN-002 节点上面安装解压二进制包 tar zxvf docker-20.10.3.tgz mv docker/* /usr/bin
systemd管理docker cat > /usr/lib/systemd/system/docker.service << EOF [Unit] Description=Docker Application Container Engine Documentation=https://docs.docker.com After=network-online.target firewalld.service Wants=network-online.target [Service] Type=notify ExecStart=/usr/bin/dockerd ExecReload=/bin/kill -s HUP $MAINPID LimitNOFILE=infinity LimitNPROC=infinity LimitCORE=infinity TimeoutStartSec=0 Delegate=yes KillMode=process Restart=on-failure StartLimitBurst=3 StartLimitInterval=60s [Install] WantedBy=multi-user.target EOF
创建配置文件 mkdir /etc/docker cat > /etc/docker/daemon.json << EOF { "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"] } EOF
启动并设置开机启动 systemctl daemon-reload systemctl start docker systemctl enable docker
配置k8s目录 下面还是在Master Node上操作，即同时作为Worker Node 创建工作目录并拷贝二进制文件 在所有worker node创建工作目录： mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs} 从master节点拷贝 cd /software/kubernetes/server/bin cp kubelet kube-proxy /data/application/kubernetes/bin # 本地拷贝
部署kubelet 1. 创建配置文件 cat > /data/application/kubernetes/cfg/kubelet.conf << EOF KUBELET_OPTS="--logtostderr=false \\ --v=2 \\ --log-dir=/data/application/kubernetes/logs \\ --hostname-override=t-k8sM-001 \\ --network-plugin=cni \\ --kubeconfig=/data/application/kubernetes/cfg/kubelet.kubeconfig \\ --bootstrap-kubeconfig=/data/application/kubernetes/cfg/bootstrap.kubeconfig \\ --config=/data/application/kubernetes/cfg/kubelet-config.yml \\ --cert-dir=/data/application/kubernetes/ssl \\ --pod-infra-container-image=lizhenliang/pause-amd64:3.0" EOF
配置参数文件 cat > /data/application/kubernetes/cfg/kubelet-config.yml << EOF kind: KubeletConfiguration apiVersion: kubelet.config.k8s.io/v1beta1 address: 0.0.0.0 port: 10250 readOnlyPort: 10255 cgroupDriver: cgroupfs clusterDNS: - 10.0.0.2 clusterDomain: cluster.local failSwapOn: false authentication: anonymous: enabled: false webhook: cacheTTL: 2m0s enabled: true x509: clientCAFile: /data/application/kubernetes/ssl/ca.pem authorization: mode: Webhook webhook: cacheAuthorizedTTL: 5m0s cacheUnauthorizedTTL: 30s evictionHard: imagefs.available: 15% memory.available: 100Mi nodefs.available: 10% nodefs.inodesFree: 5% maxOpenFiles: 1000000 maxPods: 110 EOF 在 server节点上面执行 生成bootstrap.kubeconfig文件 写一个boot.sh 脚本 把下面的内容放进去 --- KUBE_APISERVER="https://192.168.3.171:6443" # apiserver IP:PORT TOKEN="c47ffb939f5ca36231d9e3121a252940" # 与token.csv里保持一致 # 生成 kubelet bootstrap kubeconfig 配置文件 kubectl config set-cluster kubernetes \ --certificate-authority=/data/application/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=bootstrap.kubeconfig kubectl config set-credentials "kubelet-bootstrap" \ --token=${TOKEN} \ --kubeconfig=bootstrap.kubeconfig kubectl config set-context default \ --cluster=kubernetes \ --user="kubelet-bootstrap" \ --kubeconfig=bootstrap.kubeconfig kubectl config use-context default --kubeconfig=bootstrap.kubeconfig --- . ./boot.sh 拷贝到配置文件路径： cp bootstrap.kubeconfig /data/application/kubernetes/cfg
同步k8s 安装目录到 t-k8sN-001 节点： scp -P36022 -r /data/application/kubernetes/ root@192.168.3.174:/data/application/ 删掉 日志目录(t-k8sN-001) cd /data/application/kubernetes/logs/ rm -rf * 修改kubelet.conf 文件 cd /data/application/kubernetes/cfg/ vim kubelet.conf ----- --hostname-override=t-k8sN-001 ----
systemd管理kubelet cat > /usr/lib/systemd/system/kubelet.service << EOF [Unit] Description=Kubernetes Kubelet After=docker.service [Service] EnvironmentFile=/opt/kubernetes/cfg/kubelet.conf ExecStart=/opt/kubernetes/bin/kubelet \$KUBELET_OPTS Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF 启动kubelet 开机启动 systemctl daemon-reload systemctl start kubelet systemctl enable kubelet
t-k8sM-001 配置授权 kubectl get csr
批准申请 kubectl certificate approve node-csr-ogqwQ6-0S8zTmL9nF84MXk24_GUsZYi1ecc7Eu0udV8
kubectl get node 注：由于网络插件还没有部署，节点会没有准备就绪 NotReady
部署kube-proxy 部署kube-proxy 1. 创建配置文件 cat > /data/application/kubernetes/cfg/kube-proxy.conf << EOF KUBE_PROXY_OPTS="--logtostderr=false \\ --v=2 \\ --log-dir=/data/application/kubernetes/logs \\ --config=/data/application/kubernetes/cfg/kube-proxy-config.yml" EOF
配置参数文件 cat > /data/application/kubernetes/cfg/kube-proxy-config.yml << EOF kind: KubeProxyConfiguration apiVersion: kubeproxy.config.k8s.io/v1alpha1 bindAddress: 0.0.0.0 metricsBindAddress: 0.0.0.0:10249 clientConnection: kubeconfig: /data/application/kubernetes/cfg/kube-proxy.kubeconfig hostnameOverride: t-k8sN-001 clusterCIDR: 10.0.0.0/16 mode: ipvs ipvs: scheduler: "rr" iptables: masqueradeAll: true EOF # 切换工作目录 cd /root/TLS/k8s # 创建证书请求文件 cat > kube-proxy-csr.json << EOF { "CN": "system:kube-proxy", "hosts": [], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing", "O": "k8s", "OU": "System" } ] } EOF --- # 生成证书 cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy ls kube-proxy*pem kube-proxy-key.pem kube-proxy.pem cp -p kube-proxy-key.pem kube-proxy.pem /data/application/kubernetes/ssl/
生成kubeconfig文件： cd /opt/kubernetes/ssl/ vim kubeconfig.sh ---- KUBE_APISERVER="https://192.168.3.171:6443" kubectl config set-cluster kubernetes \ --certificate-authority=/data/application/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=kube-proxy.kubeconfig kubectl config set-credentials kube-proxy \ --client-certificate=./kube-proxy.pem \ --client-key=./kube-proxy-key.pem \ --embed-certs=true \ --kubeconfig=kube-proxy.kubeconfig kubectl config set-context default \ --cluster=kubernetes \ --user=kube-proxy \ --kubeconfig=kube-proxy.kubeconfig kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig ----
cp -p kube-proxy.kubeconfig /data/application/kubernetes/cfg/
同步/data/application/kubernetes 目录 scp -P36022 -r /data/application/kubernetes/ root@192.168.3.174:/data/application/
在t-k8sN-001 上面修改文件 cd /opt/kubernetes/cfg vim kubelet.conf --hostname-override=t-k8sN-001 vim kube-proxy-config.yml hostnameOverride: t-k8sN-001
systemd管理kube-proxy cat > /usr/lib/systemd/system/kube-proxy.service << EOF [Unit] Description=Kubernetes Proxy After=network.target [Service] EnvironmentFile=/data/application/kubernetes/cfg/kube-proxy.conf ExecStart=/data/application/kubernetes/bin/kube-proxy \$KUBE_PROXY_OPTS Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF 启动并设置开机启动 systemctl daemon-reload systemctl start kube-proxy systemctl enable kube-proxy
部署CNI 部署CNI网络 先准备好CNI二进制文件： 下载地址：https://github.com/containernetworking/plugins/releases/download/v0.8.6/cni-plugins-linux-amd64-v0.8.6.tgz 解压二进制包并移动到默认工作目录： mkdir /opt/cni/bin -p tar zxvf cni-plugins-linux-amd64-v0.8.6.tgz -C /opt/cni/bin scp -p36022 -r /opt/cni/ root@192.168.3.174:/opt/
部署CNI网络： wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml sed -i -r "s#quay.io/coreos/flannel:.*-amd64#lizhenliang/flannel:v0.12.0-amd64#g" kube-flannel.yml
kubectl apply -f kube-flannel.yml kubectl get node
四：增加一个worker node
4.1 先在增加节点部署一个docker
docker -version 增加 一个 work节点：(从t-k8sN-001 节点同步目录) scp -P36022 -r /data/application/kubernetes root@192.168.3.175:/data/application/ scp -P36022 -r /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.3.175:/usr/lib/systemd/system scp -P36022 -r /opt/cni/ root@192.168.3.175:/opt/ scp -P36022 -r /data/application/kubernetes/ssl/ca.pem root@192.168.3.175:/data/application/kubernetes/ssl 删掉 生成文件 删除kubelet证书和kubeconfig文件 rm -rf /data/application/kubernetes/cfg/kubelet.kubeconfig rm -rf /data/application/kubernetes/ssl/kubelet* 修改主机名 vim /data/application/kubernetes/cfg/kubelet.conf --hostname-override=t-k8sN-002 vim /data/application/kubernetes/cfg/kube-proxy-config.yml hostnameOverride: t-k8sN-002设置开机启动 启动并设置开机启动 systemctl daemon-reload systemctl start kubelet systemctl enable kubelet systemctl start kube-proxy systemctl enable kube-proxy kubectl get csr kubectl certificate approve node-csr-wVXc2iMF7kE3a1qjwIGo7qkG0l0lNOGLWaOkU3x7j54 kubectl get node
##五：配置部署Dashboard和CoreDNS
5.1 部署Dashboard
部署Dashboard: wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta8/aio/deploy/recommended.yaml 默认Dashboard只能集群内部访问，修改Service为NodePort类型，暴露到外部： vim recommended.yaml --- wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-beta8/aio/deploy/recommended.yaml 默认Dashboard只能集群内部访问，修改Service为NodePort类型，暴露到外部： vim recommended.yaml kind: Service apiVersion: v1 metadata: labels: k8s-app: kubernetes-dashboard name: kubernetes-dashboard namespace: kubernetes-dashboard spec: ports: - port: 443 targetPort: 8443 nodePort: 30001 type: NodePort selector: k8s-app: kubernetes-dashboard ---- kubectl apply -f recommended.yaml kubectl get pods,svc -n kubernetes-dashboard --- 创建service account并绑定默认cluster-admin管理员集群角色： kubectl create serviceaccount dashboard-admin -n kube-system kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin kubectl describe secrets -n kube-system $(kubectl -n kube-system get secret | awk '/dashboard-admin/{print $1}')打开firefox web 访问： https://192.168.3.174:30001
5.2 配置coreDNS
配置coreDNS kubectl apply -f coredns.yaml DNS解析测试： kubectl run -it --rm dns-test --image=busybox:1.28.4 sh 进入容器问题： 创建apiserver到kubelet的权限，就是没有给kubernetes用户rbac授权 error: unable to upgrade connection: Forbidden (user=kubernetes, verb=create, resource=nodes, subresource=proxy)cat > apiserver-to-kubelet.yaml <<EOF apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: annotations: rbac.authorization.kubernetes.io/autoupdate: "true" labels: kubernetes.io/bootstrapping: rbac-defaults name: system:kubernetes-to-kubelet rules: - apiGroups: - "" resources: - nodes/proxy - nodes/stats - nodes/log - nodes/spec - nodes/metrics verbs: - "*" --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: system:kubernetes namespace: "" roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: system:kubernetes-to-kubelet subjects: - apiGroup: rbac.authorization.k8s.io kind: User name: kubernetes EOF
kubectl apply -f apiserver-to-kubelet.yaml
kubectl run -it --rm dns-test --image=busybox:1.28.4 sh
nslookup kubernetes