kubernetes组件安装
kubernetes组件安装1、证书生成#创建目录mkdir k8s-certcd k8s-cert/#编写证书cat > ca-config.json <<EOF{"signing": {"default": {"expiry": "87600h"},"profiles": {"kubernetes": {"expiry": "87600h","usages": [
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kubernetes组件安装
1、证书生成
#创建目录
mkdir k8s-cert
cd k8s-cert/
#编写证书
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": "Chengdu",
"ST": "Chengdu",
"O": "k8s",
"OU": "System"
}
]
}
EOF
#生成证书
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
#编写apiserver证书签名
#注意:master2节点和LB节点的IP地址是 为了之后的多master节点部署添加的;
#记得去掉注释不然会报错
cat > server-csr.json <<EOF
{
"CN": "kubernetes",
"hosts": [
"10.0.0.1",
"127.0.0.1",
"10.25.247.144", #master1节点
"10.25.247.146", #master2节点
"10.25.247.147", #VIP地址
"10.25.247.148", #负载调度器(master节点)
"10.25.247.149", #负载调度器(backup节点)
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Chengdu",
"ST": "Chengdu",
"O": "k8s",
"OU": "System"
}
]
}
EOF
#生成server证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
#编写用户证书
cat > admin-csr.json <<EOF
{
"CN": "admin",
"hosts": [
"10.25.247.141", #修改成自己的节点IP地址
"10.25.247.142",
"10.25.247.143",
"10.25.247.144",
"10.25.247.145",
"10.25.193.138"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Chengdu",
"ST": "Chengdu",
"O": "system:masters",
"OU": "System"
}
]
}
EOF
#生成命令
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
# 编写 kube-proxy 证书
cat > kube-proxy-csr.json <<EOF
{
"CN": "system:kube-proxy",
"hosts": [
"10.25.247.141", #修改成自己的节点IP地址
"10.25.247.142",
"10.25.247.143",
"10.25.247.144",
"10.25.247.145",
"10.25.193.138"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Chengdu",
"ST": "Chengdu",
"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
#拷贝证书到ssl目录
cp ca*pem server*pem /opt/kubernetes/ssl/
2、kubernetes组件安装
#解压文件
cd /root/k8s
tar -zxvf kubernetes-server-linux-amd64.tar.gz
#拷贝关键内容到bin目录
cd /root/k8s/kubernetes/server/bin/
cp kube-apiserver kubectl kube-controller-manager kube-scheduler /opt/kubernetes/bin/
2.1制作token令牌
cd /root/k8s/
#使用下面的 head命令 随机生成序列号
head -c 16 /dev/urandom | od -An -t x | tr -d ' '
#8f8ef3127e814ba44caa06d63a715b55
vi /opt/kubernetes/cfg/token.csv
#写入内容:序列号,用户名,id,角色
8f8ef3127e814ba44caa06d63a715b55,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
cat /opt/kubernetes/cfg/token.csv
2.2开启apiserver
vi apiserver.sh
#!/bin/bash
MASTER_ADDRESS=$1
ETCD_SERVERS=$2
#在k8s工作目录里生成kube-apiserver 配置文件
cat <<EOF >/opt/kubernetes/cfg/kube-apiserver
KUBE_APISERVER_OPTS="--logtostderr=true \\
--v=4 \\
--etcd-servers=${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
#生成启动脚本
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
#启动apiserver组件
systemctl daemon-reload
systemctl enable kube-apiserver
systemctl restart kube-apiserver
#执行脚本
sh apiserver.sh 10.25.247.144 https://10.25.193.138:2379,https://10.25.247.142:2379,https://10.25.247.144:2379
#查看是否启动
ps aux | grep kube
2.3开启scheduler
vi scheduler.sh
#!/bin/bash
MASTER_ADDRESS=$1
cat <<EOF >/opt/kubernetes/cfg/kube-scheduler
KUBE_SCHEDULER_OPTS="--logtostderr=true \\
--v=4 \\
--master=${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
#执行scheduler.sh脚本
sh scheduler.sh 127.0.0.1
#查看是否启动
ps aux | grep kube
2.4部署controller-manager
#编写controller-manager.sh
vi controller-manager.sh
#!/bin/bash
MASTER_ADDRESS=$1
cat <<EOF >/opt/kubernetes/cfg/kube-controller-manager
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \\
--v=4 \\
--master=${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
#启动脚本
sh controller-manager.sh 127.0.0.1
#查看是否启动
ps aux | grep kube
2.5查看master节点状态
/opt/kubernetes/bin/kubectl get cs
3、部署Node节点
3.1拷贝master节点的kubelet kube-proxy
cd /root/k8s/kubernetes/server/bin
scp kubelet kube-proxy root@10.25.193.138:/opt/kubernetes/bin/
#输入密码
scp kubelet kube-proxy root@10.25.247.142:/opt/kubernetes/bin/
#输入密码
4、编写kubeconfig脚本,在master机器上
mkdir kubeconfig
cd kubeconfig/
#获取 token令牌的序列号
cat /opt/kubernetes/cfg/token.csv
#8f8ef3127e814ba44caa06d63a715b55,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
#编写脚本
vi kubeconfig
APISERVER=$1 #master节点的IP地址
SSL_DIR=$2 #k8s证书路径
# 创建kubelet bootstrapping kubeconfig
export KUBE_APISERVER="https://$APISERVER:6443"
# 设置集群参数
kubectl config set-cluster kubernetes \
--certificate-authority=$SSL_DIR/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=bootstrap.kubeconfig
# 设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \
--token=84cf410ca1d9dd456dbba668de2c1aca \ #注意:随机生成的序列号不同,要修改
--kubeconfig=bootstrap.kubeconfig
# 设置上下文参数
kubectl config set-context default \
--cluster=kubernetes \
--user=kubelet-bootstrap \
--kubeconfig=bootstrap.kubeconfig
# 设置默认上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
# 创建kube-proxy kubeconfig文件
kubectl config set-cluster kubernetes \
--certificate-authority=$SSL_DIR/ca.pem \
--embed-certs=true \
--server=${KUBE_APISERVER} \
--kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
--client-certificate=$SSL_DIR/kube-proxy.pem \
--client-key=$SSL_DIR/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
5、设置环境变量可以在任意目录下识别kubectl命令
export PATH=$PATH:/opt/kubernetes/bin/
6、检查健康状态
kubectl get cs
7、运行脚本生成配置文件
sh kubeconfig 10.25.247.144 /root/k8s-cert/
8、传递配置文件给Node节点
scp bootstrap.kubeconfig kube-proxy.kubeconfig root@10.25.193.138:/opt/kubernetes/cfg/
#输入密码
scp bootstrap.kubeconfig kube-proxy.kubeconfig root@10.25.247.142:/opt/kubernetes/cfg/
#输入密码
9、授权
创建 bootstrap角色赋予权限,用于连接 apiserver请求签名
kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created
10、Node节点启动kubelet
编写部署脚本
vi kubelet.sh
#!/bin/bash
NODE_ADDRESS=$1
DNS_SERVER_IP=${2:-"10.0.0.2"}
cat <<EOF >/opt/kubernetes/cfg/kubelet
KUBELET_OPTS="--logtostderr=true \\
--v=4 \\
--hostname-override=${NODE_ADDRESS} \\
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \\
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \\
--config=/opt/kubernetes/cfg/kubelet.config \\
--cert-dir=/opt/kubernetes/ssl \\
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"
EOF
cat <<EOF >/opt/kubernetes/cfg/kubelet.config
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: ${NODE_ADDRESS}
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- ${DNS_SERVER_IP}
clusterDomain: cluster.local.
failSwapOn: false
authentication:
anonymous:
enabled: true
EOF
cat <<EOF >/usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kubelet
ExecStart=/opt/kubernetes/bin/kubelet \$KUBELET_OPTS
Restart=on-failure
KillMode=process
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable kubelet
systemctl restart kubelet
10.1增加执行权限
chmod +x /root/kubelet.sh
10.2并执行启动
sh kubelet.sh 10.25.193.138
#查看是否启动
ps aux | grep kube
#查看kubelet状态
systemctl status -l kubelet
#查看kubelet service启动日志
journalctl -xefu kubelet
10.3master收到node节点发送的连接请求;
kubectl get csr
重新检查bootstrap角色与授权
10.4同意连接请求,颁发证书
kubectl certificate approve node-csr-QAjoBjAY3IFVL3db4hSTZ8_nMKh3OXD2YOc5H83uWwY
#查看请求状态
kubectl get csr
10.5查看集群节点
kubectl get node
11、部署node节点的kube-proxy组件
11.1编写proxy.sh部署脚本
vi proxy.sh
#!/bin/bash
NODE_ADDRESS=$1
cat <<EOF >/opt/kubernetes/cfg/kube-proxy
KUBE_PROXY_OPTS="--logtostderr=true \\
--v=4 \\
--hostname-override=${NODE_ADDRESS} \\
--cluster-cidr=10.0.0.0/24 \\
--proxy-mode=ipvs \\
--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"
EOF
cat <<EOF >/usr/lib/systemd/system/kube-proxy.service
[Unit]
Description=Kubernetes Proxy
After=network.target
[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-proxy
ExecStart=/opt/kubernetes/bin/kube-proxy \$KUBE_PROXY_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable kube-proxy
systemctl restart kube-proxy
11.2增加执行权限
chmod +x /root/k8s/proxy.sh
11.3启动proxy服务,并查看状态
sh proxy.sh 10.25.193.138
#查看proxy状态
systemctl status kube-proxy.service
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