Kubernetes二进制部署——单master集群部署(1)

Kubernetes平台环境规划

Kubernetes二进制部署——单master集群部署(1)


Kubernetes二进制部署——单master集群部署(1)

部署环境

负载均衡
Nginx1:192.168.13.128/24
Nginx2:192.168.13.129/24
Master节点
master1:192.168.13.131/24 kube-apiserver kube-controller-manager kube-scheduler etcd
master2:192.168.13.130/24 kube-apiserver kube-controller-manager kube-scheduler etcd
Node节点
node1:192.168.13.132/24 kubelet kube-proxy docker flannel etcd
node2:192.168.13.133/24 kubelet kube-proxy docker flannel etcd

Kubernetes单节点部署步骤

1:自签ETCD证书
2:ETCD部署
3:Node安装docker
4:Flannel部署(先写入子网到etcd)
-----------master---------------------------
5:自签APIServer证书
6:部署APIServer组件(token,csv)
7:部署controller-manager(指定apiserver证书)和scheduler组件
-------------node----------------------------------
8:生成kubeconfig(bootstrap,kubeconfig和kube-proxy.kubeconfig)
9:部署kubelet组件
10:部署kube-proxy组件
---------------加入群集-----------------
11:kubectl get csr && kubectl certificate approve 允许办法证书,加入群集
12:添加一个node节点
13:查看kubectl get node 节点

一,etcd证书及flannel网络部署

1,在master01中自签ETCD证书

[root@master01 ~]# mkdir k8s
[root@master01 ~]# cd k8s/
[root@master01 k8s]# rz -E  ##上传etcd脚本
[root@master01 k8s]# ls
etcd-cert.sh  etcd.sh

vim etcd-cert.sh  ##证书创建脚本内容
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": [
"10.206.240.188",
"10.206.240.189",
"10.206.240.111"
],
"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

vim etcd.sh ##etcd服务脚本
#!/bin/bash
# example: ./etcd.sh etcd01 192.168.1.10 etcd02=https://192.168.1.11:2380,etcd03=https://192.168.1.12:2380
ETCD_NAME=$1
ETCD_IP=$2
ETCD_CLUSTER=$3
WORK_DIR=/opt/etcd
cat <<EOF >$WORK_DIR/cfg/etcd
#[Member]
ETCD_NAME="${ETCD_NAME}"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://${ETCD_IP}:2380"
ETCD_LISTEN_CLIENT_URLS="https://${ETCD_IP}:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://${ETCD_IP}:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://${ETCD_IP}:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://${ETCD_IP}:2380,${ETCD_CLUSTER}"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF
cat <<EOF >/usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=${WORK_DIR}/cfg/etcd
ExecStart=${WORK_DIR}/bin/etcd 
--name=${ETCD_NAME} 
--data-dir=${ETCD_DATA_DIR} 
--listen-peer-urls=${ETCD_LISTEN_PEER_URLS} 
--listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 
--advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} 
--initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} 
--initial-cluster=${ETCD_INITIAL_CLUSTER} 
--initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} 
--initial-cluster-state=new 
--cert-file=${WORK_DIR}/ssl/server.pem 
--key-file=${WORK_DIR}/ssl/server-key.pem 
--peer-cert-file=${WORK_DIR}/ssl/server.pem 
--peer-key-file=${WORK_DIR}/ssl/server-key.pem 
--trusted-ca-file=${WORK_DIR}/ssl/ca.pem 
--peer-trusted-ca-file=${WORK_DIR}/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable etcd
systemctl restart etcd

[root@master01 k8s]# mkdir etcd-cert   ##创建证书目录
[root@master01 k8s]# mv etcd-cert.sh etcd-cert   ##将脚本放到目录中
[root@master01 k8s]# vim cfssl.sh   ##工具下载脚本
curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl
curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson
curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo
[root@master01 k8s]# bash cfssl.sh  ##下载cfssl官方包
[root@master01 k8s]# ls /usr/local/bin/
cfssl  cfssl-certinfo  cfssljson
##cfssl生成证书工具、cfssljson通过传入json文件生成证书、cfssl-certinfo查看证书信息
[root@master01 k8s]# cd /root/k8s/etcd-cert/  ##切换到证书脚本目录下
[root@master01 etcd-cert]# ls
etcd-cert.sh

##定义ca证书
[root@master01 etcd-cert]# cat > ca-config.json <<EOF
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"www": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"     
]  
} 
}         
}
}
EOF 

##实现证书的签名
[root@master01 etcd-cert]# cat > ca-csr.json <<EOF
{
"CN": "etcd CA",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
EOF

[root@master01 etcd-cert]# ls
ca-config.json  ca-csr.json  etcd-cert.sh
[root@master01 etcd-cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
##生产证书,生成ca-key.pem  ca.pem
2020/02/09 18:09:13 [INFO] generating a new CA key and certificate from CSR
2020/02/09 18:09:13 [INFO] generate received request
2020/02/09 18:09:13 [INFO] received CSR
2020/02/09 18:09:13 [INFO] generating key: rsa-2048
2020/02/09 18:09:13 [INFO] encoded CSR
2020/02/09 18:09:13 [INFO] signed certificate with serial number 443437184464842782624738198723332409563005728279
[root@master01 etcd-cert]# ls
ca-config.json  ca.csr  ca-csr.json  ca-key.pem  ca.pem  etcd-cert.sh

##指定etcd三个节点之间的通信验证
[root@master01 etcd-cert]#cat > server-csr.json <<EOF
{
"CN": "etcd",
"hosts": [
"192.168.13.131",    ##三个主机的地址
"192.168.13.132",
"192.168.13.133"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing"
}
]
}
EOF

[root@master01 etcd-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
##生成ETCD证书 server-key.pem   server.pem

2,在master01和node节点上部署etcd

[root@master01 etcd-cert]# cd /root/k8s/
[root@master01 k8s]# rz -E   ##将源码包放到k8s目录下
[root@master01 k8s]# ls
etcd-cert                        flannel-v0.10.0-linux-amd64.tar.gz
etcd.sh                          kubernetes-server-linux-amd64.tar.gz
etcd-v3.3.10-linux-amd64.tar.gz
[root@master01 k8s]# tar zxvf etcd-v3.3.10-linux-amd64.tar.gz ##解压
[root@master01 k8s]# cd etcd-v3.3.10-linux-amd64/
[root@master01 etcd-v3.3.10-linux-amd64]# ls
Documentation  etcd  etcdctl  README-etcdctl.md  README.md  READMEv2-etcdctl.md
[root@master01 etcd-v3.3.10-linux-amd64]# mkdir /opt/etcd/{cfg,bin,ssl} -p
##创建配置文件,命令文件,证书工作目录
[root@master01 etcd-v3.3.10-linux-amd64]# mv etcd etcdctl /opt/etcd/bin/  ##放置命令
[root@master01 etcd-v3.3.10-linux-amd64]# cd ../etcd-cert/
[root@master01 etcd-cert]# cp *.pem /opt/etcd/ssl/   ##证书拷贝
[root@master01 etcd-cert]# ls /opt/etcd/ssl/
ca-key.pem  ca.pem  server-key.pem  server.pem
[root@master01 etcd-cert]# cd ../
[root@master01 k8s]# bash etcd.sh etcd01 192.168.13.131 etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380
##执行etcd.sh服务脚本,进入卡住状态等待其他节点加入
[root@master01 ~]# ps -ef | grep etcd
##使用另外一个会话打开,会发现etcd进程已经开启
[root@master01 ~]# systemctl stop firewalld.service  ##关闭防火墙
[root@master01 ~]# setenforce 0
#######node节点的防火墙也需要关闭
[root@node01 ~]# systemctl stop firewalld.service  ##关闭防火墙
[root@node01 ~]# setenforce 0
#########
[root@master01 k8s]# scp -r /opt/etcd/ root@192.168.13.132:/opt    ##拷贝证书去其他node节点
[root@master01 k8s]# scp -r /opt/etcd/ root@192.168.13.133:/opt
##启动脚本拷贝其他node节点
[root@master01 k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.13.132:/usr/lib/systemd/system/
[root@master01 k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.13.133:/usr/lib/systemd/system/
#########修改node01的etcd配置文件#########
[root@node01 ~]# vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd02"   ##修改名称
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.13.132:2380"   ##地址
ETCD_LISTEN_CLIENT_URLS="https://192.168.13.132:2379"   ##地址修改
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.13.132:2380"  ##地址修改
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.13.132:2379"   ##地址修改
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.13.131:2380,etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
#########修改node02的etcd配置文件#########
[root@node02 ~]# vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd03"   ##修改名称
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.13.133:2380"   ##修改地址
ETCD_LISTEN_CLIENT_URLS="https://192.168.13.133:2379"   ##修改地址
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.13.133:2380"   ##修改地址
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.13.133:2379"    ##修改地址
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.13.131:2380,etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
#########在master01上启动脚本等待节点加入#########
[root@master01 k8s]# bash etcd.sh etcd01 192.168.13.131 etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380
#########在node上启动etcd服务#########
[root@node01 ~]# systemctl start etcd.service
[root@node02 ~]# systemctl start etcd.service
#########在master01上检查群集状态#########
[root@master01 k8s]# cd etcd-cert/   ##切换到证书的目录下
[root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379" cluster-health
##检查群集状态
member 76e0a15c7cd72ef7 is healthy: got healthy result from https://192.168.13.133:2379
member cbcfa6e700d4aa11 is healthy: got healthy result from https://192.168.13.132:2379
member e4f560fae6a18df3 is healthy: got healthy result from https://192.168.13.131:2379
cluster is healthy

3,在所有的node节点上安装docker

[root@node01 ~]# yum install -y yum-utils device-mapper-persistent-data lvm2  ##安装依赖包
[root@node01 ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
##设置阿里云镜像源
[root@node01 ~]# yum install -y docker-ce  ##安装docker
[root@node01 ~]# systemctl start docker.service
[root@node01 ~]# systemctl enable docker.service
[root@node01 ~]# tee /etc/docker/daemon.json <<-'EOF'   ##容器加速
{
"registry-mirrors": ["https://3a9s8zx5.mirror.aliyuncs.com"]
}
EOF
[root@node01 ~]# systemctl daemon-reload   ##重载
[root@node01 ~]# systemctl restart docker
[root@node01 ~]# vim /etc/sysctl.conf
net.ipv4.ip_forward=1  ##开启路由转发
[root@node01 ~]# sysctl -p   ##重载
[root@node01 ~]# service network restart
[root@node01 ~]# systemctl restart docker 

4,在所有node上部署flannel网络

[root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'
##写入分配的子网段到ETCD中,供flannel使用,网络为172.17.0.0
[root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379" get /coreos.com/network/config
##get查看写入的信息
[root@master01 etcd-cert]# cd ../
##拷贝到所有node节点(只需要部署在node节点即可)
[root@master01 k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.13.132:/root
[root@master01 k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.13.133:/root
#########在所有node节点上部署安装flannel###########
[root@node01 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz ##解压
flanneld
mk-docker-opts.sh
README.md
[root@node01 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@node01 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/
[root@node01 ~]# rz -E  ##上传flannel脚本文件

vim flannel.sh   ##编辑flannel配置文件个启动服务的脚本
#!/bin/bash
ETCD_ENDPOINTS=${1:-"http://127.0.0.1:2379"}
cat <<EOF >/opt/kubernetes/cfg/flanneld
FLANNEL_OPTIONS="--etcd-endpoints=${ETCD_ENDPOINTS} 
-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/flanneld.service
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service
[Service]
Type=notify
EnvironmentFile=/opt/kubernetes/cfg/flanneld
ExecStart=/opt/kubernetes/bin/flanneld --ip-masq $FLANNEL_OPTIONS
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable flanneld
systemctl restart flanneld

[root@node01 ~]# bash flannel.sh https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379
##开启flannel网络功能
[root@node01 ~]# vim /usr/lib/systemd/system/docker.service  ##修改服务启动文件
13 # for containers run by docker
14 EnvironmentFile=/run/flannel/subnet.env  ##添加此项
15 ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/ru    n/containerd/containerd.sock
##引用参数
[root@node01 ~]# cat /run/flannel/subnet.env  ##查看子网段信息
DOCKER_OPT_BIP="--bip=172.17.45.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
DOCKER_NETWORK_OPTIONS=" --bip=172.17.45.1/24 --ip-masq=false --mtu=1450"
[root@node01 ~]# systemctl daemon-reload   ##重载docker
[root@node01 ~]# systemctl restart docker
[root@node01 ~]# ifconfig  ##此时docker0网关为172.17.45.1,flannel是虚拟网络
[root@node01 ~]# docker run -it centos:7 /bin/bash   ##安装centos7并进入容器
[root@720f2727f307 /]# yum install net-tools -y  ##安装网络工具
[root@720f2727f307 /]# ifconfig  ##容器的地址为172.17.45.2
##############node2和node1一样的配置##############
##node2的docker0地址为172.17.1.1
[root@node02 ~]# docker run -it centos:7 /bin/bash  ##开启容器并进入容器
[root@c2cfc9af3b9f /]# yum install -y net-tools
[root@c2cfc9af3b9f /]# ifconfig   ##容器地址为172.17.1.2
[root@c2cfc9af3b9f /]# ping 172.17.45.2  ##测试flannel网络是否互通

二,部署master01节点上 apiserver,kube-controller-manager,kube-scheduler三个组件

1,自签APIServer证书

[root@master01 k8s]# rz -E  ##上传master脚本压缩包
[root@master01 k8s]# ls
master.zip
[root@master01 k8s]# unzip master.zip   ##解压
Archive:  master.zip
inflating: apiserver.sh
inflating: controller-manager.sh
inflating: scheduler.sh
[root@master01 k8s]# chmod +x controller-manager.sh  ##给执行权限
[root@master01 k8s]# mkdir k8s-cert  ##apiserver自签证书目录
[root@master01 k8s]# cd k8s-cert/
[root@master01 k8s-cert]# rz -E
[root@master01 k8s-cert]# ls   ##上传k8s证书脚本
k8s-cert.sh

vim k8s-cert.sh    ##api证书脚本
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",
"192.168.13.131",  //master1
"192.168.13.130",  //master2
"192.168.13.100",  //vip 公共访问入口
"192.168.13.128",  //lb负载均衡 (master)
"192.168.13.129",  //lb负载均衡(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 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

[root@master01 k8s-cert]# bash k8s-cert.sh   ##执行脚本
[root@master01 k8s-cert]# ls *pem   ##生成8个证书
admin-key.pem  ca-key.pem  kube-proxy-key.pem  server-key.pem
admin.pem      ca.pem      kube-proxy.pem      server.pem
[root@master01 k8s-cert]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p   ##创建工作目录
[root@master01 k8s-cert]# cp ca*pem server*pem /opt/kubernetes/ssl/  ##证书复制到工作目录

2,部署APIServer组件(token,csv)

[root@master01 k8s-cert]# cd ..
[root@master01 k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz   ##解压
[root@master01 k8s]# cd kubernetes/server/bin/   ##查看工具
[root@master01 bin]# ls
apiextensions-apiserver              kube-controller-manager.tar
cloud-controller-manager             kubectl
cloud-controller-manager.docker_tag  kubelet
cloud-controller-manager.tar         kube-proxy
hyperkube                            kube-proxy.docker_tag
kubeadm                              kube-proxy.tar
kube-apiserver                       kube-scheduler
kube-apiserver.docker_tag            kube-scheduler.docker_tag
kube-apiserver.tar                   kube-scheduler.tar
kube-controller-manager              mounter
kube-controller-manager.docker_tag
[root@master01 bin]# cp kube-apiserver kubectl kube-scheduler kube-controller-manager /opt/kubernetes/bin/
##将master的组件拷贝到工作目录下
[root@master01 bin]# head -c 16 /dev/urandom | od -An -t x | tr -d ' '  ##随机生成序列号
b555625c736044a609cf020902e773fa
[root@master01 bin]# vim /opt/kubernetes/cfg/token.csv  ##编辑token角色
b555625c736044a609cf020902e773fa,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
##序列号,用户名,id,角色

vim /root/k8s/apiserver.sh  ##查看apiserver脚本
#!/bin/bash
MASTER_ADDRESS=$1
ETCD_SERVERS=$2
cat <<EOF >/opt/kubernetes/cfg/kube-apiserver
KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=${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,Res    ourceQuota,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

[root@master01 bin]# cd /root/k8s/
[root@master01 k8s]# bash apiserver.sh 192.168.13.131 https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379
##开启apiserver前面是本地地址,后面是etcd群集的地址
[root@master01 k8s]# ps aux | grep kube  ##检查进程是否启动成功
[root@master01 k8s]# cat /opt/kubernetes/cfg/kube-apiserver  ##查看配置文件
[root@master01 k8s]# netstat -ntap | grep 6443   ##查看https的端口
tcp        0      0 192.168.13.131:6443     0.0.0.0:*               LISTEN      38191/kube-apiserve
tcp        0      0 192.168.13.131:6443     192.168.13.131:34900    ESTABLISHED 38191/kube-apiserve
tcp        0      0 192.168.13.131:34900    192.168.13.131:6443     ESTABLISHED 38191/kube-apiserve
[root@master01 k8s]# netstat -ntap | grep 8080  ##查看8080端口
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      38191/kube-apiserve 

3,部署controller-manager(指定apiserver证书)和scheduler组件


vim scheduler.sh   ##调度的脚本
#!/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

[root@master01 k8s]# ./scheduler.sh 127.0.0.1  ##开启scheduler服务

vim controller-manager.sh  ##控制管理脚本
#!/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

[root@master01 k8s]# ./controller-manager.sh 127.0.0.1 ##启动controller-manager
[root@master01 k8s]# /opt/kubernetes/bin/kubectl get cs  ##查看master 节点状态
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok
controller-manager   Healthy   ok
etcd-2               Healthy   {"health":"true"}
etcd-0               Healthy   {"health":"true"}
etcd-1               Healthy   {"health":"true"}

三,部署node节点上kubelet kube-proxy组件

1,生成kubeconfig(bootstrap,kubeconfig和kube-proxy.kubeconfig)

##在master01上操作
[root@master01 k8s]# cd kubernetes/server/bin/
##把 kubelet、kube-proxy拷贝到node节点上去
[root@master01 bin]# scp kubelet kube-proxy root@192.168.13.132:/opt/kubernetes/bin/
[root@master01 bin]# scp kubelet kube-proxy root@192.168.13.133:/opt/kubernetes/bin/
##在node节点上操作
[root@node01 ~]# rz -E  ##上传node脚本压缩包
[root@node01 ~]# unzip node.zip   ##解压
Archive:  node.zip
inflating: proxy.sh
inflating: kubelet.sh
##在master01上操作
[root@master01 bin]# cd /root/k8s/
[root@master01 k8s]# mkdir kubeconfig  ##创建目录
[root@master01 k8s]# cd kubeconfig/
[root@master01 kubeconfig]# rz -E   ##上传kubeconfig脚本
[root@master01 kubeconfig]# ls
kubeconfig.sh
[root@master01 kubeconfig]# cat /opt/kubernetes/cfg/token.csv
b555625c736044a609cf020902e773fa,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
##复制序列号进行脚本修改

vim kubeconfig.sh  ##脚本信息
##token部分要删除
APISERVER=$1
SSL_DIR=$2
# 创建kubelet bootstrapping kubeconfig
export KUBE_APISERVER="https://$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=b555625c736044a609cf020902e773fa    ##修改序列号
--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

[root@master01 kubeconfig]# vim /etc/profile  ##修改环境变量
export PATH=$PATH:/opt/kubernetes/bin/
[root@master01 kubeconfig]# source /etc/profile  ##刷新配置文件
[root@master01 kubeconfig]# bash kubeconfig 192.168.13.131 /root/k8s/k8s-cert/ ##生成配置文件
[root@master01 kubeconfig]# ls
bootstrap.kubeconfig  kubeconfig  kube-proxy.kubeconfig
[root@master01 kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.13.132:/opt/kubernetes/cfg/
##拷贝配置文件到node节点
[root@master01 kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.13.133:/opt/kubernetes/cfg/
[root@master01 kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
##创建bootstrap角色赋予权限用于连接apiserver请求签名(关键)

2,部署kubelet组件


#####在node01上操作#######
vim kubelet.sh   脚本信息
#!/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

[root@node01 ~]# bash kubelet.sh 192.168.13.132  ##执行脚本
[root@node01 ~]# ps aux | grep kube  ##查看服务启动状态
##########在master01上操作############
[root@master01 kubeconfig]# kubectl get csr ##查看证书状态
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg   73s   kubelet-bootstrap   Pending
##等待集群给该节点颁发证书
[root@master01 kubeconfig]# kubectl certificate approve node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg
[root@master01 kubeconfig]# kubectl get csr  ##查看证书状态
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg   3m34s   kubelet-bootstrap   Approved,Issued
##已经被允许加入群集
[root@master01 kubeconfig]# kubectl get node  ##查看群集节点,成功加入node01节点
NAME             STATUS   ROLES    AGE    VERSION
192.168.13.132   Ready    <none>   115s   v1.12.3

3,部署kube-proxy组件


vim proxy.sh  ##proxy脚本
#!/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

##在node01节点操作
[root@node01 ~]# bash proxy.sh 192.168.13.132  ##启动proxy服务
[root@node01 ~]# systemctl status kube-proxy.service  ##查看服务状态

4,部署node02节点

##在node01上操作
[root@node01 ~]# scp -r /opt/kubernetes/ root@192.168.13.133:/opt/
//把现成的/opt/kubernetes目录复制到其他节点进行修改即可
[root@node01 ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.13.133:/usr/lib/systemd/system/
//把kubelet,kube-proxy的service文件拷贝到node2中
##在node02上操作,进行修改
[root@node02 ~]# cd /opt/kubernetes/ssl/   ##切换到证书目录下
[root@node02 ssl]# ls
kubelet-client-2020-02-10-00-10-11.pem  kubelet.crt
kubelet-client-current.pem              kubelet.key
[root@node02 ssl]# rm -rf *    ##首先删除复制过来的证书,等会node02会自行申请证书
[root@node02 ssl]# cd ../cfg/ ##修改配置文件kubelet  kubelet.config kube-proxy(三个配置文件)
[root@node02 cfg]# vim kubelet
--hostname-override=192.168.13.133    ##修改地址
[root@node02 cfg]# vim kubelet.config
address: 192.168.13.133  ##修改地址
[root@node02 cfg]# vim kube-proxy
--hostname-override=192.168.13.133     ##修改地址
[root@node02 cfg]# systemctl start kubelet.service   ##启动kubelet服务
[root@node02 cfg]# systemctl enable kubelet.service
[root@node02 cfg]# systemctl start kube-proxy.service   ##启动kube-proxy服务
[root@node02 cfg]# systemctl enable kube-proxy.service

四,加入群集

##在master01上操作
[root@master01 k8s]# kubectl get csr  ##查看请求
NAME                                                   AGE    REQUESTOR           CONDITION
node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg   23m    kubelet-bootstrap   Approved,Issued
node-csr-qE6kNPzFp6dducllhsQucd-3PJQA5t7eVf-xNkx48MA   103s   kubelet-bootstrap   Pending
[root@master01 k8s]# kubectl certificate approve node-csr-qE6kNPzFp6dducllhsQucd-3PJQA5t7eVf-xNkx48MA
//授权许可加入群集
[root@master01 k8s]# kubectl get node  ##查看群集中的节点
NAME             STATUS   ROLES    AGE   VERSION
192.168.13.132   Ready    <none>   21m   v1.12.3
192.168.13.133   Ready    <none>   70s   v1.12.3

单节点部署完毕,未完待续...