一.kubernetes master简介
二.matser组件说明
1.kube-apiserver
2.kube-controller-manager
3.kube-scheduler
三.部署kube-apiserver
1.安装包下载
下载二进制包，直接解压即可用
wget https://dl.k8s.io/v1.13.8/kubernetes-server-linux-amd64.tar.gz tar zxvf kubernetes-server-linux-amd64.tar.gz mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs}
cd /usr/local/src/k8s_config/kubernetes/server/bin cp kube-apiserver kube-controller-manager kube-scheduler /opt/kubernetes/bin/
2.生成apiserver证书
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",
"127.0.0.1", "192.168.244.226", "192.168.244.227", "192.168.244.228", "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 #----------------------- 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 #----------------------- 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 cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
sh -x k8s-cert.sh cp ca{,-key}.pem server{,-key}.pem /opt/kubernetes/ssl/
3.生成token.csv
cd /opt/kubernetes/cfg BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008 cat > token.csv <<EOF ${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap" EOF
4.生成apiserver配置文件及服务启动文件
执行脚本apiserver.sh
#!/bin/bash MASTER_ADDRESS=$1 ETCD_SERVERS=$2 cat <<EOF >/opt/kubernetes/cfg/kube-apiserver KUBE_APISERVER_OPTS="--logtostderr=false \\ --log-dir=/opt/kubernetes/logs \\ --v=4 \\ --etcd-servers=${ETCD_SERVERS} \\ --bind-address=${MASTER_ADDRESS} \\ --secure-port=6443 \\ --advertise-address=${MASTER_ADDRESS} \\ --allow-privileged=true \\ --service-cluster-ip-range=10.0.0.0/24 \\ --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \\ --authorization-mode=RBAC,Node \\ --kubelet-https=true \\ --enable-bootstrap-token-auth \\ --token-auth-file=/opt/kubernetes/cfg/token.csv \\ --service-node-port-range=30000-50000 \\ --tls-cert-file=/opt/kubernetes/ssl/server.pem \\ --tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \\ --client-ca-file=/opt/kubernetes/ssl/ca.pem \\ --service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \\ --etcd-cafile=/opt/etcd/ssl/ca.pem \\ --etcd-certfile=/opt/etcd/ssl/server.pem \\ --etcd-keyfile=/opt/etcd/ssl/server-key.pem" EOF cat <<EOF >/usr/lib/systemd/system/kube-apiserver.service [Unit] Description=Kubernetes API Server Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=-/opt/kubernetes/cfg/kube-apiserver ExecStart=/opt/kubernetes/bin/kube-apiserver \$KUBE_APISERVER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target EOF systemctl daemon-reload systemctl enable kube-apiserver systemctl restart kube-apiserver
sh -x apiserver.sh 192.168.244.226 https://192.168.244.226:2379,https://192.168.244.227:2379,https://192.168.244.228:2379
4.1.apiserver配置文件说明
KUBE_APISERVER_OPTS="--logtostderr=false \ # 输出日志模式，true为默认将日志输出到/var/log/message，false表示输出到指定路径 --log-dir=/opt/kubernetes/logs \ # 指定日志路径 --v=4 \ # 指定日志级别，数值越大日志级别越高，输出日志越少 --etcd-servers=https://192.168.244.146:2379,https://192.168.244.152:2379,https://192.168.244.172:2379 \ # etcd地址 --bind-address=192.168.244.146 \ # 监听地址 --secure-port=6443 \ # 监听端口 --advertise-address=192.168.244.146 \ # 集群通告地址 --allow-privileged=true \ # ？？ --service-cluster-ip-range=10.0.0.0/24 \ # 对外访问的集群IP段 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \ # 启用准入插件 --authorization-mode=RBAC,Node \ # 基于RBAC认证模式 --kubelet-https=true \ --enable-bootstrap-token-auth \ # 为kubelet自动颁发证书 --token-auth-file=/opt/kubernetes/cfg/token.csv \ # token文件 --service-node-port-range=30000-50000 \ # 对外访问的集群服务端口 --tls-cert-file=/opt/kubernetes/ssl/server.pem \ # apiserver ssl证书 --tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \ --client-ca-file=/opt/kubernetes/ssl/ca.pem \ --service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \ --etcd-cafile=/opt/etcd/ssl/ca.pem \ # etcd证书 --etcd-certfile=/opt/etcd/ssl/server.pem \ --etcd-keyfile=/opt/etcd/ssl/server-key.pem"
四.部署controller-manager
执行controller-manager.sh，生成配置及服务启动
#!/bin/bash MASTER_ADDRESS=$1 cat <<EOF >/opt/kubernetes/cfg/kube-controller-manager KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \\ --log-dir=/opt/kubernetes/logs \\ --v=4 \\ --master=${MASTER_ADDRESS}:8080 \\ --leader-elect=true \\ --address=127.0.0.1 \\ --service-cluster-ip-range=10.0.0.0/24 \\ --cluster-name=kubernetes \\ --cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \\ --cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \\ --root-ca-file=/opt/kubernetes/ssl/ca.pem \\ --service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \\ --experimental-cluster-signing-duration=87600h0m0s" EOF cat <<EOF >/usr/lib/systemd/system/kube-controller-manager.service [Unit] Description=Kubernetes Controller Manager Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=-/opt/kubernetes/cfg/kube-controller-manager ExecStart=/opt/kubernetes/bin/kube-controller-manager \$KUBE_CONTROLLER_MANAGER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target EOF systemctl daemon-reload systemctl enable kube-controller-manager systemctl restart kube-controller-manager
sh -x controller-manager.sh 127.0.0.1
五.部署kube-scheduler
执行scheduler.sh
#!/bin/bash MASTER_ADDRESS=$1 cat <<EOF >/opt/kubernetes/cfg/kube-scheduler KUBE_SCHEDULER_OPTS="--logtostderr=false \\ --log-dir=/opt/kubernetes/logs \\ --v=4 \\ --master=${MASTER_ADDRESS}:8080 \\ --leader-elect" EOF cat <<EOF >/usr/lib/systemd/system/kube-scheduler.service [Unit] Description=Kubernetes Scheduler Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=-/opt/kubernetes/cfg/kube-scheduler ExecStart=/opt/kubernetes/bin/kube-scheduler \$KUBE_SCHEDULER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target EOF systemctl daemon-reload systemctl enable kube-scheduler systemctl restart kube-scheduler
sh -x scheduler.sh 127.0.0.1
六.检查集群组件状态
cp /usr/local/src/k8s_config/kubernetes/server/bin/kubectl /usr/bin/kubectl
kubectl get cs
