k8s的二进制部署:源码包部署
k8smaster01: 20.0.0.101 kube-apiserver kube-controller-manager kube-scheduler etcd
k8smaster02: 20.0.0.102 kube-apiserver kube-controller-manager kube-scheduler
node节点01: 20.0.0.103 kubelet kube-proxy etcd
node节点02: 20.0.0.104 kubelet kube-proxy etcd
负载均衡:nginx+keepalive:maser:20.0.0.105
backup : 20.0.0.106
etcd: 20.0.0.101
20.0.0.103 20.0.0.104
操作系统初始化配置
注意:该操作在所有node节点上进行,为k8s集群提供适合的初始化部署环境
#关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
iptables -F && iptables -t nat -F && iptables -t mangle -F && iptables -X
#关闭selinux
setenforce 0
sed -i 's/enforcing/disabled/' /etc/selinux/config
#关闭swap
swapoff -a
sed -ri 's/.*swap.*/#&/' /etc/fstab
#根据规划设置主机名
hostnamectl set-hostname master01
hostnamectl set-hostname node01
hostnamectl set-hostname node02
#在master添加hosts
cat >> /etc/hosts << EOF
20.0.0.101 master01
20.0.0.103 node01
20.0.0.104 node02
EOF
#调整内核参数
cat > /etc/sysctl.d/k8s.conf << EOF
#开启网桥模式,可将网桥的流量传递给iptables链
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
#关闭ipv6协议
net.ipv6.conf.all.disable_ipv6=1
net.ipv4.ip_forward=1
EOF
sysctl --system
#时间同步
yum install ntpdate -y
ntpdate ntp.aliyun.com
#将时间同步的操作添加到计划性任务,确保所有节点保证时间的同步
crontab -e
*/30 * * * * /usr/sbin/ntpdate ntp.aliyun.com
crontab -l
部署 etcd 集群
etcd目前默认使用2379端口提供HTTP API服务,2380端口和peer通信(这两个端口已经被IANA(互联网数字分配机构)官方预留给etcd)。
即etcd默认使用2379端口对外为客户端提供通讯,使用端口2380来进行服务器间内部通讯。 (etcd和api-server通信使用2379端口,etcd之间使用2380通信)
etcd在生产环境中一般推荐集群方式部署。由于etcd的leader选举机制,要求至少为3台或以上的奇数台。
//在 master01 节点上操作
#准备cfssl证书生成工具
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -O /usr/local/bin/cfssl
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -O /usr/local/bin/cfssljson
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -O /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl*
#生成Etcd证书
mkdir /opt/k8s
cd /opt/k8s/
#上传 etcd-cert.sh 和 etcd.sh 到 /opt/k8s/ 目录中
chmod +x etcd-cert.sh etcd.sh
#创建用于生成CA证书、etcd 服务器证书以及私钥的目录
mkdir /opt/k8s/etcd-cert
mv etcd-cert.sh etcd-cert/
cd /opt/k8s/etcd-cert/
./etcd-cert.sh
#查看生成的证书文件
ls
#上传 etcd-v3.4.9-linux-amd64.tar.gz 到 /opt/k8s 目录中,启动etcd服务
cd /opt/k8s/
tar zxvf etcd-v3.4.9-linux-amd64.tar.gz
mkdir -p /opt/etcd/{cfg,bin,ssl}
cd /opt/k8s/etcd-v3.4.9-linux-amd64/
mv etcd etcdctl /opt/etcd/bin/
cp /opt/k8s/etcd-cert/*.pem /opt/etcd/ssl/
cd /opt/k8s/
./etcd.sh etcd01 20.0.0.101
etcd02=https://20.0.0.103:2380,
etcd03=https://20.0.0.104:2380
ps -ef | grep etcd
scp -r /opt/etcd/ root@20.0.0.103:/opt/
scp -r /opt/etcd/ root@20.0.0.104:/opt/
scp /usr/lib/systemd/system/etcd.service root@20.0.0.103:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/etcd.service root@20.0.0.104:/usr/lib/systemd/system/
//在 node01 节点上操作
vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd02" #修改
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://20.0.0.103:2380" #修改
ETCD_LISTEN_CLIENT_URLS="https://20.0.0.103:2379" #修改
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://20.0.0.103:2380" #修改
ETCD_ADVERTISE_CLIENT_URLS="https://20.0.0.103:2379" #修改
ETCD_INITIAL_CLUSTER="etcd01=https://20.0.0.101:2380,etcd02=https://20.0.0.103:2380,etcd03=https://20.0.0.104:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
systemctl start etcd
systemctl enable etcd
systemctl status etcd
//在 node02 节点上操作
vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd03" #修改
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://20.0.0.104:2380" #修改
ETCD_LISTEN_CLIENT_URLS="https://20.0.0.104:2379" #修改
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://20.0.0.104:2380" #修改
ETCD_ADVERTISE_CLIENT_URLS="https://20.0.0.104:2379" #修改
ETCD_INITIAL_CLUSTER="etcd01=https://20.0.0.101:2380,etcd02=https://20.0.0.103:2380,etcd03=https://20.0.0.104:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
systemctl start etcd
systemctl enable etcd
systemctl status etcd
再次运行启动脚本
./etcd.sh etcd01 20.0.0.101 etcd02=https://20.0.0.103:2380,etcd03=https://20.0.0.104:2380
#检查etcd群集状态
ETCDCTL_API=3 /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://20.0.0.101:2379,https://20.0.0.103:2379,https://20.0.0.104:2379" endpoint health --write-out=table
#查看etcd集群成员列表
ETCDCTL_API=3 /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://20.0.0.101:2379,https://20.0.0.103:2379,https://20.0.0.104:2379" --write-out=table member list
#查看etcd集群中哪个节点是leader,true表示leader
ETCDCTL_API=3 /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://20.0.0.101:2379,https://20.0.0.103:2379,https://20.0.0.104:2379" endpoint status --write-out=table
部署 docker引擎
//所有 node 节点部署docker引擎
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
yum install -y docker-ce docker-ce-cli containerd.io
systemctl start docker.service
systemctl enable docker.service
部署 Master 组件
//在 master01 节点上操作
#上传 master.zip 和 k8s-cert.sh 到 /opt/k8s 目录中,解压 master.zip 压缩包
cd /opt/k8s/
unzip master.zip
chmod +x *.sh
mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs}
#创建用于生成CA证书、相关组件的证书和私钥的目录
mkdir /opt/k8s/k8s-cert
mv /opt/k8s/k8s-cert.sh /opt/k8s/k8s-cert
cd /opt/k8s/k8s-cert/
./k8s-cert.sh
ls *pem
admin-key.pem apiserver-key.pem ca-key.pem kube-proxy-key.pem
admin.pem apiserver.pem ca.pem kube-proxy.pem
cp ca*pem apiserver*pem /opt/kubernetes/ssl/
#上传 kubernetes-server-linux-amd64.tar.gz 到 /opt/k8s/ 目录中,解压 kubernetes 压缩包
cd /opt/k8s/
tar zxvf kubernetes-server-linux-amd64.tar.gz
cd /opt/k8s/kubernetes/server/bin
cp kube-apiserver kubectl kube-controller-manager kube-scheduler /opt/kubernetes/bin/
ln -s /opt/kubernetes/bin/* /usr/local/bin/
#创建 bootstrap token 认证文件,apiserver 启动时会调用,然后就相当于在集群内创建了一个这个用户,接下来就可以用 RBAC 给他授权
cd /opt/k8s/
vim token.sh
#!/bin/bash
#获取随机数前16个字节内容,以十六进制格式输出,并删除其中空格
BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ')
#生成 token.csv 文件,按照 Token序列号,用户名,UID,用户组 的格式生成
cat > /opt/kubernetes/cfg/token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF
chmod +x token.sh
./token.sh
cat /opt/kubernetes/cfg/token.csv
cd /opt/k8s/
./apiserver.sh 20.0.0.101 https://20.0.0.101:2379,https://20.0.0.103:2379,https://20.0.0.104:2379
ps aux | grep kube-apiserver
netstat -natp | grep 6443 #安全端口6443用于接收HTTPS请求,用于基于Token文件或客户端证书等认证
cd /opt/k8s/
#启动 scheduler 服务
./scheduler.sh
ps aux | grep kube-scheduler
#启动 controller-manager 服务
./controller-manager.sh
ps aux | grep kube-controller-manager
#生成kubectl连接集群的证书
./admin.sh
kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous
#通过kubectl工具查看当前集群组件状态
kubectl get cs
#查看版本信息
kubectl version
涉及的脚本
(1)etcd-cert.sh
#!/bin/bash
#配置证书生成策略,让 CA 软件知道颁发有什么功能的证书,生成用来签发其他组件证书的根证书
cat > ca-config.json <<EOF
"default": {
"expiry": "87600h"
},
"profiles": {
"www": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
#ca-config.json:可以定义多个 profiles,分别指定不同的过期时间、使用场景等参数;
#后续在签名证书时会使用某个 profile;此实例只有一个 www 模板。
#expiry:指定了证书的有效期,87600h 为10年,如果用默认值一年的话,证书到期后集群会立即宕掉
#signing:表示该证书可用于签名其它证书;生成的 ca.pem 证书中 CA=TRUE;
#key encipherment:表示使用非对称密钥加密,如 RSA 加密;
#server auth:表示client可以用该 CA 对 server 提供的证书进行验证;
#client auth:表示server可以用该 CA 对 client 提供的证书进行验证;
#注意标点符号,最后一个字段一般是没有逗号的。
#-----------------------
#生成CA证书和私钥(根证书和私钥)
cat > ca-csr.json <<EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
EOF
#CN:Common Name,浏览器使用该字段验证网站或机构是否合法,一般写的是域名
#key:指定了加密算法,一般使用rsa(size:2048)
#C:Country,国家
#ST:State,州,省
#L:Locality,地区,城市
#O: Organization Name,组织名称,公司名称
#OU: Organization Unit Name,组织单位名称,公司部门
cfssl gencert -initca ca-csr.json | cfssljson -bare ca
#生成的文件:
#ca-key.pem:根证书私钥
#ca.pem:根证书
#ca.csr:根证书签发请求文件
#cfssl gencert -initca <CSRJSON>:使用 CSRJSON 文件生成生成新的证书和私钥。如果不添加管道符号,会直接把所有证书内容输出到屏幕。
#注意:CSRJSON 文件用的是相对路径,所以 cfssl 的时候需要 csr 文件的路径下执行,也可以指定为绝对路径。
#cfssljson 将 cfssl 生成的证书(json格式)变为文件承载式证书,-bare 用于命名生成的证书文件。
#-----------------------
#生成 etcd 服务器证书和私钥
cat > server-csr.json <<EOF
{
"CN": "etcd",
"hosts": [
"20.0.0.101",
"20.0.0.103",
"20.0.0.104"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing"
}
]
}
EOF
#hosts:将所有 etcd 集群节点添加到 host 列表,需要指定所有 etcd 集群的节点 ip 或主机名不能使用网段,新增 etcd 服务器需要重新签发证书。
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
#生成的文件:
#server.csr:服务器的证书请求文件
#server-key.pem:服务器的私钥
#server.pem:服务器的数字签名证书
#-config:引用证书生成策略文件 ca-config.json
#-profile:指定证书生成策略文件中的的使用场景,比如 ca-config.json 中的 www
(2)k8s-cert.sh
#!/bin/bash
#配置证书生成策略,让 CA 软件知道颁发有什么功能的证书,生成用来签发其他组件证书的根证书
cat > ca-config.json <<EOF
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"kubernetes": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
#生成CA证书和私钥(根证书和私钥)
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 -
#-----------------------
#生成 apiserver 的证书和私钥(apiserver和其它k8s组件通信使用)
#hosts中将所有可能作为 apiserver 的 ip 添加进去,后面 keepalived 使用的 VIP 也要加入
cat > apiserver-csr.json <<EOF
{
"CN": "kubernetes",
"hosts": [
"10.0.0.1",
"127.0.0.1",
"20.0.0.101", #master01
"20.0.0.102", #master02
"20.0.0.100", #vip,后面 keepalived 使用
"20.0.0.103", #load balancer01(master)
"20.0.0.104", #load balancer02(backup)
"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 apiserver-csr.json | cfssljson -bare apiserver
#-----------------------
#生成 kubectl 连接集群的证书和私钥,具有admin权限
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 kube-proxy 的证书和私钥
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
使用时因为该格式为yaml所以#注释会影响结果,将其清除
(3)admin.sh
#!/bin/bash
mkdir /root/.kube
KUBE_CONFIG="/root/.kube/config"
KUBE_APISERVER="https://20.0.0.101:6443"
cd /opt/k8s/k8s-cert/
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/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}
(4) apiserver.sh
#!/bin/bash
#创建 kube-apiserver 启动参数配置文件
MASTER_ADDRESS=$1
ETCD_SERVERS=$2
cat >/opt/kubernetes/cfg/kube-apiserver <<EOF
KUBE_APISERVER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--etcd-servers=${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 \\
--enable-bootstrap-token-auth=true \\
--token-auth-file=/opt/kubernetes/cfg/token.csv \\
--service-node-port-range=30000-50000 \\
--kubelet-client-certificate=/opt/kubernetes/ssl/apiserver.pem \\
--service-account-issuer=api \\
--service-account-signing-key-file=/opt/kubernetes/ssl/apiserver-key.pem \\
--etcd-cafile=/opt/etcd/ssl/ca.pem \\
--etcd-certfile=/opt/etcd/ssl/server.pem \\
--etcd-keyfile=/opt/etcd/ssl/server-key.pem \\
--requestheader-client-ca-file=/opt/kubernetes/ssl/ca.pem \\
--proxy-client-cert-file=/opt/kubernetes/ssl/apiserver.pem \\
--proxy-client-key-file=/opt/kubernetes/ssl/apiserver-key.pem \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true \\
--audit-log-maxage=30 \\
--audit-log-maxbackup=3 \\
--audit-log-maxsize=100 \\
--audit-log-path=/opt/kubernetes/logs/k8s-audit.log"
EOF
#--logtostderr=true:启用日志。输出日志到标准错误控制台,不输出到文件
#--v=4:日志等级。指定输出日志的级别,v=4为调试级别详细输出
#--etcd-servers:etcd集群地址。指定etcd服务器列表(格式://ip:port),逗号分隔
#--bind-address:监听地址。指定 HTTPS 安全接口的监听地址,默认值0.0.0.0
#--secure-port:https安全端口。指定 HTTPS 安全接口的监听端口,默认值6443
#--advertise-address:集群通告地址。通过该 ip 地址向集群其他节点公布 api server 的信息,必须能够被其他节点访问
#--allow-privileged=true:启用授权。允许拥有系统特权的容器运行,默认值false
#--service-cluster-ip-range:Service虚拟IP地址段。指定 Service Cluster IP 地址段
#!/bin/bash
#example: apiserver.sh 192.168.73.105 https://192.168.73.105:2379,https://192.168.73.106:2379,https://192.168.73.107:2379
#创建 kube-apiserver 启动参数配置文件
MASTER_ADDRESS=$1
ETCD_SERVERS=$2
cat >/opt/kubernetes/cfg/kube-apiserver <<EOF
KUBE_APISERVER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--etcd-servers=${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 \\
--enable-bootstrap-token-auth=true \\
--token-auth-file=/opt/kubernetes/cfg/token.csv \\
--service-node-port-range=30000-50000 \\
--kubelet-client-certificate=/opt/kubernetes/ssl/apiserver.pem \\
--service-account-issuer=api \\
--service-account-signing-key-file=/opt/kubernetes/ssl/apiserver-key.pem \\
--etcd-cafile=/opt/etcd/ssl/ca.pem \\
--etcd-certfile=/opt/etcd/ssl/server.pem \\
--etcd-keyfile=/opt/etcd/ssl/server-key.pem \\
--requestheader-client-ca-file=/opt/kubernetes/ssl/ca.pem \\
--proxy-client-cert-file=/opt/kubernetes/ssl/apiserver.pem \\
--proxy-client-key-file=/opt/kubernetes/ssl/apiserver-key.pem \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-username-headers=X-Remote-User \\
--enable-aggregator-routing=true \\
--audit-log-maxage=30 \\
--audit-log-maxbackup=3 \\
--audit-log-maxsize=100 \\
--audit-log-path=/opt/kubernetes/logs/k8s-audit.log"
EOF
#--logtostderr=true:启用日志。输出日志到标准错误控制台,不输出到文件
#--v=4:日志等级。指定输出日志的级别,v=4为调试级别详细输出
#--etcd-servers:etcd集群地址。指定etcd服务器列表(格式://ip:port),逗号分隔
#--bind-address:监听地址。指定 HTTPS 安全接口的监听地址,默认值0.0.0.0
#--secure-port:https安全端口。指定 HTTPS 安全接口的监听端口,默认值6443
#--advertise-address:集群通告地址。通过该 ip 地址向集群其他节点公布 api server 的信息,必须能够被其他节点访问
#--allow-privileged=true:启用授权。允许拥有系统特权的容器运行,默认值false
#--service-cluster-ip-range:Service虚拟IP地址段。指定 Service Cluster IP 地址段
#--enable-bootstrap-token-auth:启用TLS bootstrap机制。在apiserver上启用Bootstrap Token 认证
#--token-auth-file=/opt/kubernetes/cfg/token.csv:指定bootstrap token认证文件路径
#--service-node-port-range:指定 Service NodePort 的端口范围,默认值30000-32767
#–-kubelet-client-xxx:apiserver访问kubelet客户端证书
#--tls-xxx-file:apiserver https证书
#1.20版本必须加的参数:–-service-account-issuer,–-service-account-signing-key-file
#--etcd-xxxfile:连接Etcd集群证书
#–-audit-log-xxx:审计日志
#启动聚合层相关配置:–requestheader-client-ca-file,–proxy-client-cert-file,–proxy-client-key-file,–requestheader-allowed-names,–requestheader-extra-headers-prefix,–requestheader-group-headers,–requestheader-username-headers,–enable-aggregator-routing
#创建 kube-apiserver.service 服务管理文件
cat >/usr/lib/systemd/system/kube-apiserver.service <<EOF
[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
(5) scheduler.sh
#!/bin/bash
##创建 kube-scheduler 启动参数配置文件
MASTER_ADDRESS=$1
cat >/opt/kubernetes/cfg/kube-scheduler <<EOF
KUBE_SCHEDULER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--leader-elect=true \\
--kubeconfig=/opt/kubernetes/cfg/kube-scheduler.kubeconfig \\
--bind-address=127.0.0.1"
EOF
#-–kubeconfig:连接 apiserver 用的配置文件,用于识别 k8s 集群
#--leader-elect=true:当该组件启动多个时,自动启动 leader 选举
##生成kube-scheduler证书
cd /opt/k8s/k8s-cert/
#创建证书请求文件
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",
#!/bin/bash
##创建 kube-scheduler 启动参数配置文件
MASTER_ADDRESS=$1
cat >/opt/kubernetes/cfg/kube-scheduler <<EOF
KUBE_SCHEDULER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--leader-elect=true \\
--kubeconfig=/opt/kubernetes/cfg/kube-scheduler.kubeconfig \\
--bind-address=127.0.0.1"
EOF
#-–kubeconfig:连接 apiserver 用的配置文件,用于识别 k8s 集群
#--leader-elect=true:当该组件启动多个时,自动启动 leader 选举
##生成kube-scheduler证书
cd /opt/k8s/k8s-cert/
#创建证书请求文件
cat > kube-scheduler-csr.json << EOF
{
"CN": "system:kube-scheduler",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "system:masters",
"OU": "System"
}
]
}
EOF
#生成证书
#生成kubeconfig文件
KUBE_CONFIG="/opt/kubernetes/cfg/kube-scheduler.kubeconfig"
KUBE_APISERVER="https://20.0.0.101:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${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}
##创建 kube-scheduler.service 服务管理文件
cat >/usr/lib/systemd/system/kube-scheduler.service <<EOF
[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
(6)controller-manager.sh
#!/bin/bash
##创建 kube-controller-manager 启动参数配置文件
MASTER_ADDRESS=$1
cat >/opt/kubernetes/cfg/kube-controller-manager <<EOF
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--leader-elect=true \\
--kubeconfig=/opt/kubernetes/cfg/kube-controller-manager.kubeconfig \\
--bind-address=127.0.0.1 \\
--allocate-node-cidrs=true \\
--cluster-cidr=10.244.0.0/16 \\
--service-cluster-ip-range=10.0.0.0/24 \\
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \\
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--root-ca-file=/opt/kubernetes/ssl/ca.pem \\
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--cluster-signing-duration=87600h0m0s"
EOF
#––leader-elect:当该组件启动多个时,自动选举(HA)
#-–kubeconfig:连接 apiserver 用的配置文件,用于识别 k8s 集群
#--experimental-cluster-signing-duration:设置为 TLS BootStrapping 签署的证书有效时间为10年,默认为1年
##生成kube-controller-manager证书
cd /opt/k8s/k8s-cert/
#创建证书请求文件
cat > kube-controller-manager-csr.json << EOF
{
"CN": "system:kube-controller-manager",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing",
"O": "system:masters",
"OU": "System"
}
]
}
EOF
#生成证书
#生成kubeconfig文件
KUBE_CONFIG="/opt/kubernetes/cfg/kube-controller-manager.kubeconfig"
KUBE_APISERVER="https://20.0.0.101:6443"
kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=${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}
##创建 kube-controller-manager.service 服务管理文件
cat >/usr/lib/systemd/system/kube-controller-manager.service <<EOF
[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