K8s-单master集群部署（1）

程序员文章站 2022-07-15 16:01:28

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Kubernetes平台环境规划

K8s-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

[aaa@qq.com ~]# mkdir k8s
[aaa@qq.com ~]# cd k8s/
[aaa@qq.com k8s]# rz -E  ##上传etcd脚本
[aaa@qq.com 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

[aaa@qq.com k8s]# mkdir etcd-cert   ##创建证书目录
[aaa@qq.com k8s]# mv etcd-cert.sh etcd-cert   ##将脚本放到目录中
[aaa@qq.com 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
[aaa@qq.com k8s]# bash cfssl.sh  ##下载cfssl官方包
[aaa@qq.com 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
[aaa@qq.com k8s]# cd /root/k8s/etcd-cert/  ##切换到证书脚本目录下
[aaa@qq.com etcd-cert]# ls
etcd-cert.sh

##定义ca证书
[aaa@qq.com 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
[aaa@qq.com etcd-cert]# cat > ca-csr.json <<EOF 
 {   
		"CN": "etcd CA",
		"key": {
				 "algo": "rsa",
				 "size": 2048
		 },
		 "names": [
				 {
						 "C": "CN",
						 "L": "Beijing",
						 "ST": "Beijing"
				 }
		 ]
 }
 EOF

[aaa@qq.com etcd-cert]# ls
ca-config.json  ca-csr.json  etcd-cert.sh
[aaa@qq.com 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
[aaa@qq.com 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
[aaa@qq.com 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

[aaa@qq.com 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

[aaa@qq.com etcd-cert]# cd /root/k8s/
[aaa@qq.com k8s]# rz -E   ##将源码包放到k8s目录下
[aaa@qq.com 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
[aaa@qq.com k8s]# tar zxvf etcd-v3.3.10-linux-amd64.tar.gz ##解压
[aaa@qq.com k8s]# cd etcd-v3.3.10-linux-amd64/
[aaa@qq.com etcd-v3.3.10-linux-amd64]# ls
Documentation  etcd  etcdctl  README-etcdctl.md  README.md  READMEv2-etcdctl.md
[aaa@qq.com 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
[aaa@qq.com etcd-v3.3.10-linux-amd64]# mv etcd etcdctl /opt/etcd/bin/  ##放置命令
[aaa@qq.com etcd-v3.3.10-linux-amd64]# cd ../etcd-cert/
[aaa@qq.com etcd-cert]# cp *.pem /opt/etcd/ssl/   ##证书拷贝
[aaa@qq.com etcd-cert]# ls /opt/etcd/ssl/
ca-key.pem  ca.pem  server-key.pem  server.pem
[aaa@qq.com etcd-cert]# cd ../
[aaa@qq.com 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
[aaa@qq.com ~]# ps -ef | grep etcd
##使用另外一个会话打开，会发现etcd进程已经开启
[aaa@qq.com ~]# systemctl stop firewalld.service  ##关闭防火墙
[aaa@qq.com ~]# setenforce 0
#######node节点的防火墙也需要关闭
[aaa@qq.com ~]# systemctl stop firewalld.service  ##关闭防火墙
[aaa@qq.com ~]# setenforce 0
#########
[aaa@qq.com k8s]# scp -r /opt/etcd/ aaa@qq.com:/opt    ##拷贝证书去其他node节点
[aaa@qq.com k8s]# scp -r /opt/etcd/ aaa@qq.com:/opt
##启动脚本拷贝其他node节点
[aaa@qq.com k8s]# scp /usr/lib/systemd/system/etcd.service aaa@qq.com:/usr/lib/systemd/system/ 
[aaa@qq.com k8s]# scp /usr/lib/systemd/system/etcd.service aaa@qq.com:/usr/lib/systemd/system/
#########修改node01的etcd配置文件#########
[aaa@qq.com ~]# 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#########
[aaa@qq.com ~]# 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#########
[aaa@qq.com 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#########
[aaa@qq.com ~]# systemctl start etcd.service   
[aaa@qq.com ~]# systemctl start etcd.service
#########在master01上检查群集状态#########
[aaa@qq.com k8s]# cd etcd-cert/   ##切换到证书的目录下
[aaa@qq.com 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

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

4，在所有node上部署flannel网络

[aaa@qq.com 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
[aaa@qq.com 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
[aaa@qq.com etcd-cert]# cd ../
##拷贝到所有node节点（只需要部署在node节点即可）
[aaa@qq.com k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz aaa@qq.com:/root  
[aaa@qq.com k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz aaa@qq.com:/root
#########在所有node节点上部署安装flannel###########
[aaa@qq.com ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz ##解压
flanneld
mk-docker-opts.sh
README.md
[aaa@qq.com ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[aaa@qq.com ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/
[aaa@qq.com ~]# 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

[aaa@qq.com ~]# 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
[aaa@qq.com ~]# 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
[aaa@qq.com ~]# 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"
[aaa@qq.com ~]# systemctl daemon-reload   ##重载docker
[aaa@qq.com ~]# systemctl restart docker
[aaa@qq.com ~]# ifconfig  ##此时docker0网关为172.17.45.1，flannel是虚拟网络
[aaa@qq.com ~]# docker run -it centos:7 /bin/bash   ##安装centos7并进入容器
[aaa@qq.com /]# yum install net-tools -y  ##安装网络工具
[aaa@qq.com /]# 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
[aaa@qq.com ~]# docker run -it centos:7 /bin/bash  ##开启容器并进入容器
[aaa@qq.com /]# yum install -y net-tools
[aaa@qq.com /]# ifconfig   ##容器地址为172.17.1.2
[aaa@qq.com /]# 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

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

[aaa@qq.com k8s-cert]# bash k8s-cert.sh   ##执行脚本
[aaa@qq.com 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
[aaa@qq.com k8s-cert]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p   ##创建工作目录
[aaa@qq.com 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）

[aaa@qq.com k8s-cert]# cd ..
[aaa@qq.com k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz   ##解压
[aaa@qq.com k8s]# cd kubernetes/server/bin/   ##查看工具
[aaa@qq.com 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
[aaa@qq.com 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
[aaa@qq.com bin]# head -c 16 /dev/urandom | od -An -t x | tr -d ' '  ##随机生成***
b555625c736044a609cf020902e773fa
[aaa@qq.com bin]# vim /opt/kubernetes/cfg/token.csv  ##编辑token角色
b555625c736044a609cf020902e773fa,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
##***，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

[aaa@qq.com bin]# cd /root/k8s/
[aaa@qq.com 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
[aaa@qq.com k8s]# ps aux | grep kube  ##检查进程是否启动成功
[aaa@qq.com k8s]# cat /opt/kubernetes/cfg/kube-apiserver  ##查看配置文件
[aaa@qq.com 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 
[aaa@qq.com 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

[aaa@qq.com 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

[aaa@qq.com k8s]# ./controller-manager.sh 127.0.0.1 ##启动controller-manager
[aaa@qq.com 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
[aaa@qq.com k8s]# cd kubernetes/server/bin/
##把 kubelet、kube-proxy拷贝到node节点上去
[aaa@qq.com bin]# scp kubelet kube-proxy aaa@qq.com:/opt/kubernetes/bin/
[aaa@qq.com bin]# scp kubelet kube-proxy aaa@qq.com:/opt/kubernetes/bin/
##在node节点上操作
[aaa@qq.com ~]# rz -E  ##上传node脚本压缩包
[aaa@qq.com ~]# unzip node.zip   ##解压
Archive:  node.zip
	inflating: proxy.sh                
	inflating: kubelet.sh
##在master01上操作
[aaa@qq.com bin]# cd /root/k8s/
[aaa@qq.com k8s]# mkdir kubeconfig  ##创建目录
[aaa@qq.com k8s]# cd kubeconfig/
[aaa@qq.com kubeconfig]# rz -E   ##上传kubeconfig脚本
[aaa@qq.com kubeconfig]# ls
kubeconfig.sh
[aaa@qq.com kubeconfig]# cat /opt/kubernetes/cfg/token.csv 
b555625c736044a609cf020902e773fa,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
##复制***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***
	--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

[aaa@qq.com kubeconfig]# vim /etc/profile  ##修改环境变量
export PATH=$PATH:/opt/kubernetes/bin/
[aaa@qq.com kubeconfig]# source /etc/profile  ##刷新配置文件
[aaa@qq.com kubeconfig]# bash kubeconfig 192.168.13.131 /root/k8s/k8s-cert/ ##生成配置文件
[aaa@qq.com kubeconfig]# ls
bootstrap.kubeconfig  kubeconfig  kube-proxy.kubeconfig
[aaa@qq.com kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig aaa@qq.com:/opt/kubernetes/cfg/
##拷贝配置文件到node节点
[aaa@qq.com kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig aaa@qq.com:/opt/kubernetes/cfg/
[aaa@qq.com 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

[aaa@qq.com ~]# bash kubelet.sh 192.168.13.132  ##执行脚本
[aaa@qq.com ~]# ps aux | grep kube  ##查看服务启动状态
##########在master01上操作############
[aaa@qq.com 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
[aaa@qq.com kubeconfig]# kubectl certificate approve node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg
[aaa@qq.com 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
[aaa@qq.com 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
[aaa@qq.com ~]# bash proxy.sh 192.168.13.132  ##启动proxy服务
[aaa@qq.com ~]# systemctl status kube-proxy.service  ##查看服务状态

4，部署node02节点

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

四，加入群集

##在master01上操作
[aaa@qq.com 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
[aaa@qq.com k8s]# kubectl certificate approve node-csr-qE6kNPzFp6dducllhsQucd-3PJQA5t7eVf-xNkx48MA
//授权许可加入群集
[aaa@qq.com 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…

.168.13.133 ##修改地址
[aaa@qq.com cfg]# vim kube-proxy
–hostname-override=192.168.13.133 \ ##修改地址
[aaa@qq.com cfg]# systemctl start kubelet.service ##启动kubelet服务
[aaa@qq.com cfg]# systemctl enable kubelet.service
[aaa@qq.com cfg]# systemctl start kube-proxy.service ##启动kube-proxy服务
[aaa@qq.com cfg]# systemctl enable kube-proxy.service

四，加入群集

##在master01上操作
[aaa@qq.com 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
[aaa@qq.com k8s]# kubectl certificate approve node-csr-qE6kNPzFp6dducllhsQucd-3PJQA5t7eVf-xNkx48MA
//授权许可加入群集
[aaa@qq.com 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

K8s-单master集群部署（1）

Kubernetes平台环境规划

部署环境

Kubernetes单节点部署步骤

一，etcd证书及flannel网络部署

1，在master01中自签ETCD证书

2，在master01和node节点上部署etcd

3，在所有的node节点上安装docker

4，在所有node上部署flannel网络

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

1，自签APIServer证书

2，部署APIServer组件（token，csv）

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

三，部署node节点上kubelet kube-proxy组件

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

2，部署kubelet组件

3，部署kube-proxy组件

4，部署node02节点

四，加入群集

单节点部署完毕，未完待续…

四，加入群集

单节点部署完毕，未完待续…

K8s-单master集群部署（1）

Kubernetes 集群部署（三）（master、node 部分）

Kubernetes 多master集群部署

Kubernetes 集群部署之Master部署

K8S单master部署一：环境规划、ETCD部署

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