### 🧱 基础配置 --- ```shell # 关闭防火墙 systemctl stop firewalld systemctl disable firewalld # 关闭selinux sed -i 's/enforcing/disabled/' /etc/selinux/config setenforce 0 # 关闭swap swapoff -a sed -ri 's/.*swap.*/#&/' /etc/fstab cat > /etc/sysctl.d/k8s.conf << EOF net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 EOF sysctl --system yum install -y bash-completion supervisor.noarch nc iftop telnet yum install -y conntrack ntpdate ntp ipvsadm ipset jq iptables curl sysstat libseccomp wget vim net-tools git bridge-utils dstat tree yum install -y yum-utils device-mapper-persistent-data lvm2 unzip ``` ### 😢 设置变量 --- ```shell ETCD=('x.x.x.x' 'x.x.x.x' 'x.x.x.x') Master=('x.x.x.x' 'x.x.x.x' 'x.x.x.x') SLBIP=x.x.x.x Domain=("" "") ClusterCidr= ServiceIPs= DnsIP= ``` ### 😵‍💫 证书颁发 --- ##### etcd 证书 ```shell mkdir -p ~/TLS/etcd cd ~/TLS/etcd 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 - cat > server-csr.json << EOF { "CN": "etcd", "hosts": [ "${ETCD[0]}", "${ETCD[1]}", "${ETCD[2]}" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing" } ] } EOF cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server ``` ##### k8s 证书 ```shell mkdir -p ~/TLS/k8s cd ~/TLS/k8s cat > ca-config.json << EOF { "signing": { "default": { "expiry": "87600h" }, "profiles": { "kubernetes": { "expiry": "87600h", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } } } EOF cat > ca-csr.json << EOF { "CN": "kubernetes", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing", "O": "k8s", "OU": "System" } ] } EOF cfssl gencert -initca ca-csr.json | cfssljson -bare ca - cat > server-csr.json << EOF { "CN": "kubernetes", "hosts": [ "10.0.0.1", "10.71.0.1", "127.0.0.1", "${Master[0]}", "${Master[1]}", "${Master[2]}", "${SLBIP}", "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 cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server ``` ### 😹 安装etcd --- ```shell mkdir /home/etcd/{bin,config,ssl} -p cp ~/TLS/etcd/{ca-key.pem,ca.pem,server-key.pem,server.pem} /home/etcd/ssl/ cp k8s/etcd/bin/etcd /home/etcd/bin/ #这里需要注意不同etcd节点需要修改name 以及ip cat > /home/etcd/config/etcd.yml << EOF name: "etcd01" data-dir: "/home/etcd/data/default.etcd" listen-peer-urls: "https://x.x.x.x:2380" listen-client-urls: "https://x.x.x.x:2379" quota-backend-bytes: 8589934592 auto-compaction-retention: "3" initial-cluster: "etcd01=https://x.x.x.x:2380,etcd02=https://x.x.x.x:2380,etcd03=https://x.x.x.x:2380" initial-cluster-token: 'etcd-cluster' initial-cluster-state: 'new' initial-advertise-peer-urls: "https://x.x.x.x:2380" advertise-client-urls: "https://x.x.x.x:2379" client-transport-security: cert-file: "/home/etcd/ssl/server.pem" key-file: "/home/etcd/ssl/server-key.pem" client-cert-auth: true trusted-ca-file: "/home/etcd/ssl/ca.pem" peer-transport-security: cert-file: "/home/etcd/ssl/server.pem" key-file: "/home/etcd/ssl/server-key.pem" client-cert-auth: true trusted-ca-file: "/home/etcd/ssl/ca.pem" logger: zap EOF 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 ExecStart=/home/etcd/bin/etcd --config-file=/home/etcd/config/etcd.yml Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF #配置完成一台etcd之后可以直接scp至其他节点然后修改ip配置启动etcd #这里需要注意etcd name 01 02 03 都是具体的标示 scp到别的机器上之后需要修改 systemctl start etcd systemctl enable etcd ETCDCTL_API=3 etcdctl --cacert=/home/etcd/ssl/ca.pem --cert=/home/etcd/ssl/server.pem --key=/home/etcd/ssl/server-key.pem --endpoints="https://x.x.x.x:2379,https://x.x.x.x:2379,https://x.x.x.x:2379" endpoint health ``` ### 🐳 安装docker --- ```shell yum install -y yum-utils yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo #如果安装高版本docker containerd会依赖高版本 需要下载rpm安装新版本 #https://download.docker.com/linux/centos/7/x86_64/stable/Packages/ wget https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.4.9-3.1.el7.x86_64.rpm yum localinstall containerd.io-1.4.9-3.1.el7.x86_64.rpm -y #安装指定版本docker yum install docker-ce-20.10.8 -y #创建docker目录并且挂盘 mkdir /docker-data mkfs.xfs /dev/vdb mount /dev/vdb /docker-data #需要在docker service文件添加--graph /docker-data/docker --bip=10.10.201.1/24 启动参数 mkdir -p /etc/docker cat > /etc/docker/daemon.json << EOF { "exec-opts": ["native.cgroupdriver=systemd"], "bip": "10.10.201.1/24", "data-root": "/docker-data/docker" } EOF systemctl start docker systemctl enable docker ``` ### 🧠 安装master --- ##### apiserver ```shell mkdir -p /home/kubernetes/{bin,config,ssl} mkdir -p /www-volume/logs/{kube-apiserver,kube-controller,kube-scheduler,kubelet,kube-proxy} cp TLS/k8s/{ca.pem,ca-key.pem,server-key.pem,server.pem} /home/kubernetes/ssl/ cp -r k8s/kubernetes/bin/ /home/kubernetes/bin/ cp -r k8s/cni /opt/ cat > /home/kubernetes/config/token.csv << EOF e537d04b49b03df79cf29c2b53bfcfae,kubelet-bootstrap,10001,"system:node-bootstrapper" EOF head -c 16 /dev/urandom | od -An -t x | tr -d ' ' cat > /usr/lib/systemd/system/kube-apiserver.service << EOF [Unit] Description=Kubernetes API Server Documentation=https://github.com/kubernetes/kubernetes [Service] ExecStart=/home/kubernetes/bin/kube-apiserver --logtostderr=false \ --v=2 \ --log-dir=/www-volume/logs/kube-apiserver \ --log-file=/www-volume/logs/kube-apiserver/kube-apiserver.log \ --log-file-max-size=100 \ --etcd-servers=https://x.x.x.x:2379,https://x.x.x.x:2379,https://x.x.x.x:2379 \ --bind-address=x.x.x.x \ --secure-port=6443 \ --advertise-address=x.x.x.x \ --allow-privileged=true \ --service-cluster-ip-range=10.71.0.0/24 \ --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \ --authorization-mode=RBAC,Node \ --enable-bootstrap-token-auth=true \ --token-auth-file=/home/kubernetes/config/token.csv \ --service-node-port-range=30000-32767 \ --kubelet-client-certificate=/home/kubernetes/ssl/server.pem \ --kubelet-client-key=/home/kubernetes/ssl/server-key.pem \ --tls-cert-file=/home/kubernetes/ssl/server.pem \ --tls-private-key-file=/home/kubernetes/ssl/server-key.pem \ --client-ca-file=/home/kubernetes/ssl/ca.pem \ --service-account-key-file=/home/kubernetes/ssl/ca-key.pem \ --service-account-issuer=api \ --service-account-signing-key-file=/home/kubernetes/ssl/server-key.pem \ --etcd-cafile=/home/etcd/ssl/ca.pem \ --etcd-certfile=/home/etcd/ssl/server.pem \ --etcd-keyfile=/home/etcd/ssl/server-key.pem \ --requestheader-client-ca-file=/home/kubernetes/ssl/ca.pem \ --proxy-client-cert-file=/home/kubernetes/ssl/server.pem \ --proxy-client-key-file=/home/kubernetes/ssl/server-key.pem \ --requestheader-allowed-names=kubernetes \ --requestheader-extra-headers-prefix=X-Remote-Extra- \ --requestheader-group-headers=X-Remote-Group \ --requestheader-username-headers=X-Remote-User \ --enable-aggregator-routing=true \ --audit-log-maxage=15 \ --audit-log-maxbackup=15 \ --audit-log-maxsize=512 \ --feature-gates=EphemeralContainers=true \ --audit-log-compress \ --audit-log-mode=batch \ --audit-policy-file=/home/kubernetes/config/kube-api-auditlog.yaml \ --audit-log-path=/www-volume/logs/kubernetes-audit/kuberntes-audit.log Restart=on-failure [Install] WantedBy=multi-user.target EOF ``` ##### controller-manager ```shell cd ~/TLS/k8s cat > kube-controller-manager-csr.json << EOF { "CN": "system:kube-controller-manager", "hosts": [], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing", "O": "system:masters", "OU": "System" } ] } EOF cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-controller-manager-csr.json | cfssljson -bare kube-controller-manager KUBE_CONFIG="/home/kubernetes/config/kube-controller-manager.kubeconfig" KUBE_APISERVER="https://x.x.x.x:6443" kubectl config set-cluster kubernetes \ --certificate-authority=/home/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=${KUBE_CONFIG} kubectl config set-credentials kube-controller-manager \ --client-certificate=./kube-controller-manager.pem \ --client-key=./kube-controller-manager-key.pem \ --embed-certs=true \ --kubeconfig=${KUBE_CONFIG} kubectl config set-context default \ --cluster=kubernetes \ --user=kube-controller-manager \ --kubeconfig=${KUBE_CONFIG} kubectl config use-context default --kubeconfig=${KUBE_CONFIG} cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF [Unit] Description=Kubernetes Controller Manager Documentation=https://github.com/kubernetes/kubernetes [Service] ExecStart=/home/kubernetes/bin/kube-controller-manager --logtostderr=false \ --v=2 \ --log-dir=/www-volume/logs/kube-controller \ --log-file=/www-volume/logs/kube-controller/kube-controller.log \ --log-file-max-size=100 \ --leader-elect=true \ --kubeconfig=/home/kubernetes/config/kube-controller-manager.kubeconfig \ --bind-address=0.0.0.0 \ --allocate-node-cidrs=true \ --cluster-cidr=10.70.0.0/16 \ --leader-elect-resource-lock=endpoints \ --service-cluster-ip-range=10.71.0.0/24 \ --cluster-signing-cert-file=/home/kubernetes/ssl/ca.pem \ --cluster-signing-key-file=/home/kubernetes/ssl/ca-key.pem \ --root-ca-file=/home/kubernetes/ssl/ca.pem \ --service-account-private-key-file=/home/kubernetes/ssl/ca-key.pem \ --cluster-signing-duration=87600h0m0s Restart=on-failure [Install] WantedBy=multi-user.target EOF systemctl daemon-reload systemctl start kube-controller-manager systemctl enable kube-controller-manager ``` ##### scheduler ```shell cd ~/TLS/k8s cat > kube-scheduler-csr.json << EOF { "CN": "system:kube-scheduler", "hosts": [], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing", "O": "system:masters", "OU": "System" } ] } EOF # 生成证书 cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-scheduler-csr.json | cfssljson -bare kube-scheduler KUBE_CONFIG="/home/kubernetes/config/kube-scheduler.kubeconfig" KUBE_APISERVER="https://x.x.x.x:6443" kubectl config set-cluster kubernetes \ --certificate-authority=/home/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=${KUBE_CONFIG} kubectl config set-credentials kube-scheduler \ --client-certificate=./kube-scheduler.pem \ --client-key=./kube-scheduler-key.pem \ --embed-certs=true \ --kubeconfig=${KUBE_CONFIG} kubectl config set-context default \ --cluster=kubernetes \ --user=kube-scheduler \ --kubeconfig=${KUBE_CONFIG} kubectl config use-context default --kubeconfig=${KUBE_CONFIG} cat > /usr/lib/systemd/system/kube-scheduler.service << EOF [Unit] Description=Kubernetes Scheduler Documentation=https://github.com/kubernetes/kubernetes [Service] ExecStart=/home/kubernetes/bin/kube-scheduler --logtostderr=false \ --v=2 \ --log-dir=/www-volume/logs/kube-scheduler \ --log-file=/www-volume/logs/kube-scheduler/kube-scheduler.log \ --log-file-max-size=100 \ --leader-elect=true \ --leader-elect-resource-lock=endpoints \ --kubeconfig=/home/kubernetes/config/kube-scheduler.kubeconfig \ --bind-address=0.0.0.0 Restart=on-failure [Install] WantedBy=multi-user.target EOF systemctl daemon-reload systemctl start kube-scheduler systemctl enable kube-scheduler ``` ##### admin证书制作 kubectl权限 ```shell cat > admin-csr.json <<EOF { "CN": "admin", "hosts": [], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing", "O": "system:masters", "OU": "System" } ] } EOF cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin 生成kubeconfig文件： mkdir /root/.kube KUBE_CONFIG="/root/.kube/config" KUBE_APISERVER="https://x.x.x.x:6443" kubectl config set-cluster kubernetes \ --certificate-authority=/home/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=${KUBE_CONFIG} kubectl config set-credentials cluster-admin \ --client-certificate=./admin.pem \ --client-key=./admin-key.pem \ --embed-certs=true \ --kubeconfig=${KUBE_CONFIG} kubectl config set-context default \ --cluster=kubernetes \ --user=cluster-admin \ --kubeconfig=${KUBE_CONFIG} kubectl config use-context default --kubeconfig=${KUBE_CONFIG} kubectl get cs kubectl create clusterrolebinding kubelet-admin --clusterrole=system:kubelet-api-admin --user=kubernetes kubectl create clusterrolebinding kubelet-bootstrap \ --clusterrole=system:node-bootstrapper \ --user=kubelet-bootstrap ``` ### 😼 安装node --- ##### kubelet ```shell KUBE_CONFIG="/home/kubernetes/config/bootstrap.kubeconfig" KUBE_APISERVER="https://x.x.x.x:6443" # apiserver IP:PORT TOKEN="e537d04b49b03df79cf29c2b53bfcfae" # 与token.csv里保持一致 # 生成 kubelet bootstrap kubeconfig 配置文件 kubectl config set-cluster kubernetes \ --certificate-authority=/home/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=${KUBE_CONFIG} kubectl config set-credentials "kubelet-bootstrap" \ --token=${TOKEN} \ --kubeconfig=${KUBE_CONFIG} kubectl config set-context default \ --cluster=kubernetes \ --user="kubelet-bootstrap" \ --kubeconfig=${KUBE_CONFIG} kubectl config use-context default --kubeconfig=${KUBE_CONFIG} cat > /usr/lib/systemd/system/kubelet.service << EOF [Unit] Description=Kubernetes Kubelet After=docker.service [Service] ExecStart=/home/kubernetes/bin/kubelet --logtostderr=false \ --v=2 \ --log-dir=/www-volume/logs/kubelet \ --log-file=/www-volume/logs/kubelet/kubelet.log \ --log-file-max-size=100 \ --hostname-override=cbd-master01.ali-bj \ --network-plugin=cni \ --kubeconfig=/home/kubernetes/config/kubelet.kubeconfig \ --config=/home/kubernetes/config/kubelet-config.yml \ --bootstrap-kubeconfig=/home/kubernetes/config/bootstrap.kubeconfig \ --cert-dir=/home/kubernetes/ssl \ --system-reserved=memory=1G \ --kube-reserved=memory=1G \ --pod-infra-container-image=harbor.xxx.com/base/pause:3.1 Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF cat > /home/kubernetes/config/kubelet-config.yml << EOF kind: KubeletConfiguration apiVersion: kubelet.config.k8s.io/v1beta1 address: 0.0.0.0 port: 10250 readOnlyPort: 10255 cgroupDriver: systemd clusterDNS: - x.x.x.x clusterDomain: cluster.local failSwapOn: false authentication: anonymous: enabled: false webhook: cacheTTL: 2m0s enabled: true x509: clientCAFile: /home/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: 55 EOF systemctl daemon-reload systemctl start kubelet systemctl enable kubelet kubectl get csr | grep Pending | awk '{print $1}' | xargs kubectl certificate approve ``` ##### kube-proxy ```shell cd ~/TLS/k8s # 创建证书请求文件 cat > kube-proxy-csr.json << EOF { "CN": "system:kube-proxy", "hosts": [], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing", "O": "k8s", "OU": "System" } ] } EOF # 生成证书 cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy KUBE_CONFIG="/home/kubernetes/config/kube-proxy.kubeconfig" KUBE_APISERVER="https://x.x.x.x:6443" kubectl config set-cluster kubernetes \ --certificate-authority=/home/kubernetes/ssl/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=${KUBE_CONFIG} kubectl config set-credentials kube-proxy \ --client-certificate=./kube-proxy.pem \ --client-key=./kube-proxy-key.pem \ --embed-certs=true \ --kubeconfig=${KUBE_CONFIG} kubectl config set-context default \ --cluster=kubernetes \ --user=kube-proxy \ --kubeconfig=${KUBE_CONFIG} kubectl config use-context default --kubeconfig=${KUBE_CONFIG} cat > /usr/lib/systemd/system/kube-proxy.service << EOF [Unit] Description=Kubernetes Proxy After=network.target [Service] ExecStart=/home/kubernetes/bin/kube-proxy --logtostderr=false \ --v=2 \ --log-file=/www-volume/logs/kube-proxy/kube-proxy.log \ --log-file-max-size=100 \ --log-dir=/www-volume/logs/kube-proxy \ --config=/home/kubernetes/config/kube-proxy-config.yml Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF cat > /home/kubernetes/config/kube-proxy-config.yml << EOF apiVersion: kubeproxy.config.k8s.io/v1alpha1 bindAddress: 0.0.0.0 clientConnection: acceptContentTypes: "" burst: 10 kubeconfig: /home/kubernetes/config/kube-proxy.kubeconfig qps: 5 clusterCIDR: 10.70.0.0/16 configSyncPeriod: 15m0s conntrack: max: null maxPerCore: 32768 min: 131072 tcpCloseWaitTimeout: 1h0m0s tcpEstablishedTimeout: 24h0m0s enableProfiling: false healthzBindAddress: 0.0.0.0:10256 hostnameOverride: "" iptables: masqueradeAll: false masqueradeBit: 14 minSyncPeriod: 0s syncPeriod: 30s ipvs: excludeCIDRs: null minSyncPeriod: 0s scheduler: "rr" strictARP: false syncPeriod: 30s kind: KubeProxyConfiguration metricsBindAddress: 0.0.0.0:10249 mode: "ipvs" nodePortAddresses: null oomScoreAdj: -999 portRange: "" resourceContainer: /kube-proxy udpIdleTimeout: 250ms winkernel: enableDSR: false networkName: "" sourceVip: "" hostnameOverride: cbd-master01.ali-bj EOF systemctl daemon-reload systemctl start kube-proxy systemctl enable kube-proxy ```