k8s二进制部署

插件
- 集群角色
  - master节点部署插件
  - node节点部署插件
二进制部署系统准备(所有节点)
二进制部署(开始)

插件

集群角色

master节点：管理集群
node节点：部署应用

master节点部署插件

kube-apiserver：中央管理器，调度管理集群
kube-controller-manager(控制器):管理容器，监控容器
kube-scheduler(调度器):调度容器
flannel,calico:提供集群网络
etcd：数据库
kubectl
kube-proxy

node节点部署插件

kubelet:部署容器，监控容器。（只监控自己node节点容器）
kube-proxy:提供容器间的网络

二进制部署系统准备(所有节点)

1、节点规划

# 节点规划
master:192.168.0.214
node1:192.168.0.215
node2:192.168.0.216

cat >> /etc/hosts << EOF
192.168.0.214 sg-14
192.168.0.215 sg-15
192.168.0.216 sg-16
EOF

2、插件规划

# Master节点规划
kube-apiserver
kube-controller-manager
kube-scheduler
flannel
etcd
kubelet
kube-proxy

# Node节点规划
kubelet
kube-proxy

3、系统优化

# 关闭selinux

# 关闭防火墙
systemctl stop firewalld.service。//关闭防火墙
systemctl disable --now firewalld。//禁止开启启动

# 关闭swap分区
swapoff -a
修改/etc/fstab
echo 'KUBELET_EXTRA_ARGS="--fail-swap-on=false"' > /etc/sysconfig/kubelet   # kubelet忽略swap

# 做免密登录
[root@sg-14 ~]# ssh-keygen -t rsa
[root@sg-14 ~]# for i in sg-14 sg-15 sg-16;do  ssh-copy-id -i ~/.ssh/id_rsa.pub root@$i; done

# 同步集群时间


# 配置镜像源
[root@sg-14 ~]# curl  -o /etc/yum.repos.d/CentOS-Base.repo https://repo.huaweicloud.com/repository/conf/CentOS-7-reg.repo
[root@sg-14 ~]# yum clean all
[root@sg-14 ~]# yum makecache

# 更新系统
[root@sg-14 ~]# yum update -y --exclud=kernel*

# 安装基础常用软件
[root@sg-14 ~]# yum install wget expect vim net-tools ntp bash-completion ipvsadm ipset jq iptables conntrack sysstat libseccomp -y

# 更新系统内核（docker 对系统内核要求比较高，最好使用4.4+）
    [root@sg-14 ~]# wget https://elrepo.org/linux/kernel/el7/x86_64/RPMS/kernel-lt-5.4.107-1.el7.elrepo.x86_64.rpm
    [root@sg-14 ~]# https://elrepo.org/linux/kernel/el7/x86_64/RPMS/kernel-lt-devel-5.4.107-1.el7.elrepo.x86_64.rpm
    ## 安装系统内容
    [root@sg-14 ~]# yum localinstall -y kernel-lt*
    ## 调到默认启动
    [root@sg-14 ~]# grub2-set-default  0 && grub2-mkconfig -o /etc/grub2.cfg
    ## 查看当前默认启动的内核
    [root@sg-14 ~]# grubby --default-kernel
    ## 重启
    [root@sg-14 ~]# reboot

# 安装IPVS
    yum install -y conntrack-tools ipvsadm ipset conntrack libseccomp

   	## 加载IPVS模块
cat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
ipvs_modules="ip_vs ip_vs_lc ip_vs_wlc ip_vs_rr ip_vs_wrr ip_vs_lblc ip_vs_lblcr ip_vs_dh ip_vs_sh ip_vs_fo ip_vs_nq ip_vs_sed ip_vs_ftp nf_conntrack"
for kernel_module in \${ipvs_modules}; do
/sbin/modinfo -F filename \${kernel_module} > /dev/null 2>&1
if [ $? -eq 0 ]; then
/sbin/modprobe \${kernel_module}
fi
done
EOF

    chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep ip_vs

# 修改内核启动参数
cat > /etc/sysctl.d/k8s.conf << EOF
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp.keepaliv.probes = 3
net.ipv4.tcp_keepalive_intvl = 15
net.ipv4.tcp.max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp.max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.top_timestamps = 0
net.core.somaxconn = 16384
EOF

# 立即生效
sysctl --system

4、安装docker

docker安装

二进制部署(开始)

证书

6套认证
根证书：生成应用证书

1、集群证书（master节点）

# 以下命令只需要在master01执行即可

# 安装证书生成工具
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64

# 设置执行权限
chmod +x cfssljson_linux-amd64
chmod +x cfssl_linux-amd64

# 移动到/usr/local/bin
mv cfssljson_linux-amd64 cfssljson
mv cfssl_linux-amd64 cfssl
mv cfssljson cfssl /usr/local/bin

2、生成根证书(master节点)

根证书配置文件

mkdir -p /opt/cert/ca

cat > /opt/cert/ca/ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "8760h"
    },
    "profiles": {
      "kubernetes": {
        "usages": [
          "signing",
          "key encipherment",
          "server auth",
          "client auth"
        ],
           "expiry": "8760h"
      }
    }
  }
}
EOF

#################################
"expiry": "8760h"  --> 有效期1年 
"usages": [ // 功能
  "signing", //认证
  "key encipherment", //私钥
  "server auth", // 服务端认证
  "client auth" // 客户端认证
],
#################################

生成根证书请求文件

cat > /opt/cert/ca/ca-csr.json << EOF
{
  "CN": "kubernetes",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names":[{
    "C": "CN",
    "ST": "ShangHai",
    "L": "ShangHai"
  }]
}
EOF

开始生成根证书

[root@sg-14 /opt/cert/ca]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

######################################
[root@sg-14 ca]# ll
总用量 20
-rw-r--r-- 1 root root  285 10月 29 10:39 ca-config.json
-rw-r--r-- 1 root root  960 10月 29 10:41 ca.csr
-rw-r--r-- 1 root root  153 10月 29 10:39 ca-csr.json
-rw------- 1 root root 1675 10月 29 10:41 ca-key.pem
-rw-r--r-- 1 root root 1281 10月 29 10:41 ca.pem
[root@sg-14 ca]#
ca.csr:根证书请求签名文件
ca-key.pem:根证书私钥
ca.pem:根证书
#######################################

部署ETCD数据库集群

1、节点规划(所有msater节点)

192.168.0.214  etcd01

2、创建ETCD集群证书

mkdir -p /opt/cert/etcd
cd /opt/cert/etcd

cat > /opt/cert/etcd/etcd-csr.json << EOF
{
    "CN": "etcd",
    "hosts": [
        "127.0.0.1",
        "192.168.0.214",
        "192.168.0.215",
        "192.168.0.216"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
          "C": "CN",
          "ST": "ShangHai",
          "L": "ShangHai"
        }
    ]
}
EOF


#############################
所有节点ip
"hosts": [
        "127.0.0.1",
        "192.168.0.214",
        "192.168.0.215",
        "192.168.0.216"
    ],
##############################

3、生成ETCD证书

[root@sg-14 /opt/cert/etcd]# cfssl gencert -ca=../ca/ca.pem -ca-key=../ca/ca-key.pem -config=../ca/ca-config.json -profile=kubernetes etcd-csr.json | cfssljson -bare etcd

####################################################
2021/03/26 17:38:57 [INFO] generate received request
2021/03/26 17:38:57 [INFO] received CSR
2021/03/26 17:38:57 [INFO] generating key: rsa-2048
2021/03/26 17:38:58 [INFO] encoded CSR
2021/03/26 17:38:58 [INFO] signed certificate with serial number 179909685000914921289186132666286329014949215773
2021/03/26 17:38:58 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").                           ####################################################

4.分发ETCD证书

# 只分发所有的master节点
[root@sg-14 /opt/cert/etcd]# for ip in sg-14;do 
   ssh root@${ip} "mkdir -pv /etc/etcd/ssl"
   scp ../ca/ca*.pem  root@${ip}:/etc/etcd/ssl
   scp ./etcd*.pem  root@${ip}:/etc/etcd/ssl   
 done

#############################################
ls /etc/etcd/ssl/
ca-key.pem  ca.pem  etcd-key.pem  etcd.pem
#############################################

5、部署ETCD

# 下载ETCD安装包
cd /opt/
wget https://mirrors.huaweicloud.com/etcd/v3.3.24/etcd-v3.3.24-linux-amd64.tar.gz

# 解压
tar xf etcd-v3.3.24-linux-amd64

# 分发至master其他节点
for i in sg-14 sg-15 sg-16
do
	scp ./etcd-v3.3.24-linux-amd64/etcd* root@$i:/usr/local/bin/
done

// 检查etcd是否安装成功
[root@sg-14 /opt/etcd-v3.3.24-linux-amd64]# etcd --version
etcd Version: 3.3.24
Git SHA: bdd57848d
Go Version: go1.12.17
Go OS/Arch: linux/amd64

6、注册ETCD服务

# 在所有master节点上执行
mkdir -pv /etc/kubernetes/conf/etcd

ETCD_NAME=`hostname`
INTERNAL_IP="192.168.0.214"
INITIAL_CLUSTER=sg-14=https://192.168.0.214:2380
cat << EOF | sudo tee /usr/lib/systemd/system/etcd.service
[Unit]
Description=etcd
Documentation=https://github.com/coreos

[Service]
ExecStart=/usr/local/bin/etcd \\
  --name ${ETCD_NAME} \\
  --cert-file=/etc/etcd/ssl/etcd.pem \\
  --key-file=/etc/etcd/ssl/etcd-key.pem \\
  --peer-cert-file=/etc/etcd/ssl/etcd.pem \\
  --peer-key-file=/etc/etcd/ssl/etcd-key.pem \\
  --trusted-ca-file=/etc/etcd/ssl/ca.pem \\
  --peer-trusted-ca-file=/etc/etcd/ssl/ca.pem \\
  --peer-client-cert-auth \\
  --client-cert-auth \\
  --initial-advertise-peer-urls https://${INTERNAL_IP}:2380 \\
  --listen-peer-urls https://${INTERNAL_IP}:2380 \\
  --listen-client-urls https://${INTERNAL_IP}:2379,https://127.0.0.1:2379 \\
  --advertise-client-urls https://${INTERNAL_IP}:2379 \\
  --initial-cluster-token etcd-cluster \\
  --initial-cluster ${INITIAL_CLUSTER} \\
  --initial-cluster-state new \\
  --data-dir=/var/lib/etcd
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF

# 启动ETCD服务
systemctl enable --now etcd

###############成功！！！#########################
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd.service to /usr/lib/systemd/system/etcd.service.

##############################
添上所有的master节点
INITIAL_CLUSTER=sg-14=https://192.168.0.214:2380
INTERNAL_IP="192.168.0.214" //master节点ip
•	ETCD_NAME：节点名称，集群中唯一
•	ETCD_DATA_DIR：数据目录
•	ETCD_LISTEN_PEER_URLS：集群通信监听地址
•	ETCD_LISTEN_CLIENT_URLS：客户端访问监听地址
•	ETCD_INITIAL_ADVERTISE_PEER_URLS：集群通告地址
•	ETCD_ADVERTISE_CLIENT_URLS：客户端通告地址
•	ETCD_INITIAL_CLUSTER：集群节点地址
•	ETCD_INITIAL_CLUSTER_TOKEN：集群Token
•	ETCD_INITIAL_CLUSTER_STATE：加入集群的当前状态，new是新集群，existing表示加入已有集群
##############################

7、测试ETCD服务

# 第一种方式
ETCDCTL_API=3 etcdctl \
--cacert=/etc/etcd/ssl/etcd.pem \
--cert=/etc/etcd/ssl/etcd.pem \
--key=/etc/etcd/ssl/etcd-key.pem \
--endpoints="https://192.168.0.214:2379" \
endpoint status --write-out='table'

# 第二种方式
ETCDCTL_API=3 etcdctl \
--cacert=/etc/etcd/ssl/etcd.pem \
--cert=/etc/etcd/ssl/etcd.pem \
--key=/etc/etcd/ssl/etcd-key.pem \
--endpoints="https://192.168.0.214:2379" \
member list --write-out='table'

部署master节点

主要把master节点上的各个组件部署成功

1、集群规划

# vim /etc/hosts
master:192.168.0.214
node1:192.168.0.215
node2:192.168.0.216

cat >> /etc/hosts << EOF
192.168.0.214 sg-14
192.168.0.215 sg-15
192.168.0.216 sg-16
EOF

kube-apiserver,控制器，调度器，flannel,etcd,kubelet,kube-proxy,dns

2、ca证书

生成根证书配置文件

mkdir /opt/cert/k8s
[root@sg-14 k8s] cat > /opt/cert/k8s/ca-config.json << EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

生成根证书请求文件

[root@sg-14 k8s] cat > /opt/cert/k8s/ca-csr.json << EOF
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "ShangHai",
            "ST": "ShangHai"
        }
    ]
}
EOF

生成ca根证书

[root@sg-14 /opt/cert/ca]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

######################################
[root@sg-14 ca]# ll
总用量 20
-rw-r--r-- 1 root root  294 10月 29 15:26 ca-config.json
-rw-r--r-- 1 root root  960 10月 29 15:37 ca.csr
-rw-r--r-- 1 root root  214 10月 29 15:27 ca-csr.json
-rw------- 1 root root 1675 10月 29 15:37 ca-key.pem
-rw-r--r-- 1 root root 1281 10月 29 15:37 ca.pem
[root@sg-14 ca]#
ca.csr:根证书请求签名文件
ca-key.pem:根证书私钥
ca.pem:根证书
#######################################

3、创建集群普通证书

创建kube-apiserver的证书配置文件

[root@sg-14 k8s]# mkdir /opt/cert/k8s
[root@sg-14 k8s]# cat > /opt/cert/k8s/server-csr.json << EOF
{
    "CN": "kubernetes",
    "hosts": [
        "127.0.0.1",
        "192.168.0.214",
        "192.168.0.215",
        "192.168.0.216",
        "10.96.0.1",
        "kubernetes",
        "kubernetes.default",
        "kubernetes.default.svc",
        "kubernetes.default.svc.cluster",
        "kubernetes.default.svc.cluster.local"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "ShangHai",
            "ST": "ShangHai"
        }
    ]
}
EOF

############################################
"hosts": [
        "127.0.0.1",
        "192.168.0.214", ## master的ip
        "192.168.0.215", ## node1的ip
        "192.168.0.216", ## node2的ip
        "10.96.0.1",  ## 集群内部网络
        "kubernetes",
        "kubernetes.default",
        "kubernetes.default.svc",
        "kubernetes.default.svc.cluster",
        "kubernetes.default.svc.cluster.local"
    ],
############################################

创建kube-apiserver证书

[root@sg-14 k8s] cd /opt/cert/k8s
[root@sg-14 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server

#########################################
[root@sg-14 k8s]# ll
总用量 36
-rw-r--r-- 1 root root  294 10月 29 15:26 ca-config.json
-rw-r--r-- 1 root root  960 10月 29 15:37 ca.csr
-rw-r--r-- 1 root root  214 10月 29 15:27 ca-csr.json
-rw------- 1 root root 1675 10月 29 15:37 ca-key.pem
-rw-r--r-- 1 root root 1281 10月 29 15:37 ca.pem
-rw-r--r-- 1 root root 1220 10月 29 16:03 server.csr
-rw-r--r-- 1 root root  528 10月 29 16:00 server-csr.json
-rw------- 1 root root 1679 10月 29 16:03 server-key.pem
-rw-r--r-- 1 root root 1549 10月 29 16:03 server.pem
#########################################

创建controller-manager的证书配置文件

集群控制器
[root@sg-14 /opt/cert/k8s]# cat > /opt/cert/k8s/kube-controller-manager-csr.json << EOF
{
    "CN": "system:kube-controller-manager",
    "hosts": [
        "127.0.0.1",
        "192.168.0.214",
        "192.168.0.215",
        "192.168.0.216"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "ShangHai",
            "ST": "ShangHai",
            "O": "system:kube-controller-manager",
            "OU": "System"
        }
    ]
}
EOF

创建controller-manager的证书配置文件

[root@sg-14 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-controller-manager-csr.json | cfssljson -bare kube-controller-manager

创建kube-scheduler的证书配置文件

调度器
[root@sg-14 k8s]# cat > /opt/cert/k8s/kube-scheduler-csr.json << EOF
{
    "CN": "system:kube-scheduler",
    "hosts": [
        "127.0.0.1",
        "192.168.0.214",
        "192.168.0.215",
        "192.168.0.216"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing",
            "O": "system:kube-scheduler",
            "OU": "System"
        }
    ]
}
EOF

创建kube-scheduler的证书

[root@sg-14 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-scheduler-csr.json | cfssljson -bare kube-scheduler

创建kube-proxy的证书配置文件

kube-proxy:只提供容器网络，和其他组件无关联。所以hosts为空

[root@sg-14 k8s]# cat > kube-proxy-csr.json << EOF
{
    "CN":"system:kube-proxy",
    "hosts":[],
    "key":{
        "algo":"rsa",
        "size":2048
    },
    "names":[
        {
            "C":"CN",
            "L":"BeiJing",
            "ST":"BeiJing",
            "O":"system:kube-proxy",
            "OU":"System"
        }
    ]
}
EOF

创建kube-proxy的证书

[root@sg-14 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy

创建集群管理员证书配置文件

cat > /opt/cert/k8s/admin-csr.json << EOF
{
    "CN":"admin",
    "key":{
        "algo":"rsa",
        "size":2048
    },
    "names":[
        {
            "C":"CN",
            "L":"BeiJing",
            "ST":"BeiJing",
            "O":"system:masters",
            "OU":"System"
        }
    ]
}
EOF

创建集群管理员证书

[root@sg-14 k8s]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin

创建kubelet的证书配置文件

使用TLS bootstrapping自动生成

创建TLS bootstrapping证书

自动化创建node，高可用时部署

4、颁发证书

把创建的证书，分发的其他节点
[root@sg-14 k8s]# mkdir -pv /etc/kubernetes/ssl
[root@sg-14 k8s]# cp -p ./{ca*pem,server*pem,kube-controller-manager*pem,kube-scheduler*.pem,kube-proxy*pem,admin*.pem} /etc/kubernetes/ssl

//for循环分发
[root@sg-14 ssl]# for i in sg-14 sg-15 sg-16;do
ssh root@$i "mkdir -pv /etc/kubernetes/ssl"
scp /etc/kubernetes/ssl/* root@$i:/etc/kubernetes/ssl
done

5、下载安装包和编辑配置文件

下载

https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.20.md#downloads-for-v12012
[root@sg-14 ssl]# mkdir /opt/data/
// 下载
[root@sg-14 data]# cd /opt/data/ && wget https://dl.k8s.io/v1.20.12/kubernetes-server-linux-amd64.tar.gz

// 解压
[root@sg-14 data]# tar -xf kubernetes-server-linux-amd64.tar.gz

//分发组件
[root@sg-14 bin]# cd kubernetes/server/bin
[root@sg-14 bin]# for i in sg-14 sg-15 sg-16 ;do  scp kube-apiserver kube-controller-manager kube-proxy kubectl kubelet kube-scheduler root@$i:/usr/local/bin; done

创建kube-controller-manager.kubeconfig管理员集群配置文件

cd /opt/cert/k8s/
## 创建kube-controller-manager.kubeconfig
export KUBE_APISERVER="https://192.168.0.214:8443"

# 设置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=kube-controller-manager.kubeconfig

# 设置客户端认证参数
kubectl config set-credentials "kube-controller-manager" \
  --client-certificate=/etc/kubernetes/ssl/kube-controller-manager.pem \
  --client-key=/etc/kubernetes/ssl/kube-controller-manager-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-controller-manager.kubeconfig

# 设置上下文参数（在上下文参数中将集群参数和用户参数关联起来）
kubectl config set-context default \
  --cluster=kubernetes \
  --user="kube-controller-manager" \
  --kubeconfig=kube-controller-manager.kubeconfig

# 配置默认上下文
kubectl config use-context default --kubeconfig=kube-controller-manager.kubeconfig

创建kube-scheduler.kubeconfig集群配置文件

cd /opt/cert/k8s/
# 创建kube-scheduler.kubeconfig
export KUBE_APISERVER="https://192.168.0.214:8443"

# 设置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=kube-scheduler.kubeconfig

# 设置客户端认证参数
kubectl config set-credentials "kube-scheduler" \
  --client-certificate=/etc/kubernetes/ssl/kube-scheduler.pem \
  --client-key=/etc/kubernetes/ssl/kube-scheduler-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-scheduler.kubeconfig

# 设置上下文参数（在上下文参数中将集群参数和用户参数关联起来）
kubectl config set-context default \
  --cluster=kubernetes \
  --user="kube-scheduler" \
  --kubeconfig=kube-scheduler.kubeconfig

# 配置默认上下文
kubectl config use-context default --kubeconfig=kube-scheduler.kubeconfig

创建kube-proxy.kubeconfig集群配置文件

cd /opt/cert/k8s/
## 创建kube-proxy.kubeconfig集群配置文件
export KUBE_APISERVER="https://192.168.0.214:8443"

# 设置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=kube-proxy.kubeconfig

# 设置客户端认证参数
kubectl config set-credentials "kube-proxy" \
  --client-certificate=/etc/kubernetes/ssl/kube-proxy.pem \
  --client-key=/etc/kubernetes/ssl/kube-proxy-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-proxy.kubeconfig

# 设置上下文参数（在上下文参数中将集群参数和用户参数关联起来）
kubectl config set-context default \
  --cluster=kubernetes \
  --user="kube-proxy" \
  --kubeconfig=kube-proxy.kubeconfig

# 配置默认上下文
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig

创建超级管理员的集群配置文件

cd /opt/cert/k8s/
export KUBE_APISERVER="https://192.168.0.214:8443"

# 设置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=admin.kubeconfig

# 设置客户端认证参数
kubectl config set-credentials "admin" \
  --client-certificate=/etc/kubernetes/ssl/admin.pem \
  --client-key=/etc/kubernetes/ssl/admin-key.pem \
  --embed-certs=true \
  --kubeconfig=admin.kubeconfig

# 设置上下文参数（在上下文参数中将集群参数和用户参数关联起来）
kubectl config set-context default \
  --cluster=kubernetes \
  --user="admin" \
  --kubeconfig=admin.kubeconfig

# 配置默认上下文
kubectl config use-context default --kubeconfig=admin.kubeconfig

6、颁发集群配置文件

cd /opt/cert/k8s/
for i in sg-14 sg-15 sg-16; do
ssh root@$i  "mkdir -pv /etc/kubernetes/cfg"
scp ./*.kubeconfig root@$i:/etc/kubernetes/cfg
done

7、创建集群token

# 只需要创建一次
# 必须要用自己机器创建的Token
TLS_BOOTSTRAPPING_TOKEN=`head -c 16 /dev/urandom | od -An -t x | tr -d ' '`

cat > token.csv << EOF
${TLS_BOOTSTRAPPING_TOKEN},kubelet_bootstrap,10001,"system:kubelet_bootstrap"
EOF

# 分发集群token，用于集群TLS认证
[root@sg-14 k8s]## for i in sg-14 sg-15 sg-16;do
scp token.csv root@$i:
done

7、部署各个组件

安装各个组件，使其可以正常工作

注册创建kube-apiserver配置文件

# 在所有的master节点上执行
# 注意：KUBE_APISERVER_IP=`hostname -i`能否获取ip地址
# KUBE_APISERVER_IP=`hostname -i`
KUBE_APISERVER_IP="192.168.0.214"
cat > /etc/kubernetes/cfg/kube-apiserver.conf << EOF
KUBE_APISERVER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/var/log/kubernetes \\
--advertise-address=${KUBE_APISERVER_IP} \\
--default-not-ready-toleration-seconds=360 \\
--default-unreachable-toleration-seconds=360 \\
--max-mutating-requests-inflight=2000 \\
--max-requests-inflight=4000 \\
--default-watch-cache-size=200 \\
--delete-collection-workers=2 \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--allow-privileged=true \\
--service-cluster-ip-range=10.96.0.0/16 \\
--service-node-port-range=30000-52767 \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \\
--authorization-mode=RBAC,Node \\
--enable-bootstrap-token-auth=true \\
--token-auth-file=/etc/kubernetes/cfg/token.csv \\
--kubelet-client-certificate=/etc/kubernetes/ssl/server.pem \\
--kubelet-client-key=/etc/kubernetes/ssl/server-key.pem \\
--tls-cert-file=/etc/kubernetes/ssl/server.pem  \\
--tls-private-key-file=/etc/kubernetes/ssl/server-key.pem \\
--client-ca-file=/etc/kubernetes/ssl/ca.pem \\
--service-account-key-file=/etc/kubernetes/ssl/ca-key.pem \\
--audit-log-maxage=30 \\
--audit-log-maxbackup=3 \\
--audit-log-maxsize=100 \\
--audit-log-path=/var/log/kubernetes/k8s-audit.log \\
--etcd-servers=https://192.168.0.214:2379 \\
--etcd-cafile=/etc/etcd/ssl/ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem"
EOF



#########################################
servers:需要修改
service-node-port-range：改为30000以上，避免冲突
KUBE_APISERVER_IP:修改
少了这3个参数，参照下面配置文件
--service-account-issuer
--service-account-key-file
--service-account-signing-key-file
#########################################

注册kube-apiserver的服务

## 生成 service-account-key.pem，service-account.pem
cd /etc/kubernetes/apiserver
openssl genrsa -out service-account-key.pem 4096
openssl req -new -x509 -days 365 -key service-account-key.pem -sha256 -out service-account.pem

cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-apiserver.conf
ExecStart=/usr/local/bin/kube-apiserver \\
	--logtostderr=false \\
  --log-dir=/var/log/kubernetes \\
  --advertise-address=192.168.0.214 \\
  --default-not-ready-toleration-seconds=360 \\
  --default-unreachable-toleration-seconds=360 \\
  --max-mutating-requests-inflight=2000 \\
  --max-requests-inflight=4000 \\
  --default-watch-cache-size=200 \\
  --delete-collection-workers=2 \\
  --bind-address=0.0.0.0 \\
  --secure-port=6443 \\
  --allow-privileged=true \\
  --service-cluster-ip-range=10.96.0.0/16 \\
  --service-node-port-range=30000-52767 \\
  --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \\
  --authorization-mode=RBAC,Node \\
  --enable-bootstrap-token-auth=true \\
  --token-auth-file=/etc/kubernetes/cfg/token.csv \\
  --kubelet-client-certificate=/etc/kubernetes/ssl/server.pem \\
  --kubelet-client-key=/etc/kubernetes/ssl/server-key.pem \\
  --tls-cert-file=/etc/kubernetes/ssl/server.pem  \\
  --tls-private-key-file=/etc/kubernetes/ssl/server-key.pem \\
  --client-ca-file=/etc/kubernetes/ssl/ca.pem \\
  --service-account-key-file=/etc/kubernetes/ssl/ca-key.pem \\
  --audit-log-maxage=30 \\
  --audit-log-maxbackup=3 \\
  --audit-log-maxsize=100 \\
  --audit-log-path=/var/log/kubernetes/k8s-audit.log \\
  --etcd-servers=https://192.168.0.214:2379 \\
  --etcd-cafile=/etc/etcd/ssl/ca.pem \\
  --etcd-certfile=/etc/etcd/ssl/etcd.pem \\
  --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
  --service-account-issuer=api \\
  --service-account-key-file=/etc/kubernetes/apiserver/service-account.pem \\
  --service-account-signing-key-file=/etc/kubernetes/apiserver/service-account-key.pem \\
  --v=2 
Restart=on-failure
RestartSec=10
Type=notify
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

// 刷新配置文件
[root@sg-14 cfg]# systemctl daemon-reload
tail -f /var/log/messages //查看系统日志
systemctl  restart kube-apiserver.service
systemctl  status kube-apiserver.service
systemctl enable --now kube-apiserver.service

对kube-apiserver做高可用

步骤：
安装高可用软件
修改keepalived配置文件
修改haproxy配置文件

安装高可用软件

# 三台master节点都需要安装
# keeplived + haproxy
[root@sg-14 ~]# yum install -y keepalived haproxy

修改keepalived配置文件

# 做Vip的，做master所有机器做代理。根据节点的不同，修改的配置也不同
mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf_bak

cd /etc/keepalived

# KUBE_APISERVER_IP=`hostname -i`
KUBE_APISERVER_IP="192.169.0.214"
cat > /etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived
global_defs {
    router_id LVS_DEVEL
}
vrrp_script chk_kubernetes {
    script "/etc/keepalived/check_kubernetes.sh"
    interval 2
    weight -5
    fall 3
    rise 2
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    mcast_src_ip ${KUBE_APISERVER_IP}
    virtual_router_id 51
    priority 100
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass K8SHA_KA_AUTH
    }
    virtual_ipaddress {
        192.168.15.56
    }
}
EOF

############################################
如果3个master,也有一个主，两个从
master1:主
state MASTER
mcast_src_ip：master1的ip 3个不同的master的ip
priority:100 优先级
virtual_ipaddress {
        192.168.15.56  # 虚拟ip
    }

master2:从
state BACKUP
mcast_src_ip：master2的ip
priority:90 优先级
virtual_ipaddress {
        192.168.15.56  # 虚拟ip
    }
访问192.168.15.56就相当于随机访问所有master机器
############################################
[root@sg-14 /etc/keepalived]# systemctl enable --now keepalived

修改haproxy配置文件

# 高可用软件，做负载均衡
cat > /etc/haproxy/haproxy.cfg <<EOF
global
  maxconn  2000 
  ulimit-n  16384
  log  127.0.0.1 local0 err
  stats timeout 30s

defaults
  log global
  mode  http
  option  httplog
  timeout connect 5000
  timeout client  50000
  timeout server  50000
  timeout http-request 15s
  timeout http-keep-alive 15s

frontend monitor-in
  bind *:33305
  mode http
  option httplog
  monitor-uri /monitor

listen stats
  bind    *:8006
  mode    http
  stats   enable
  stats   hide-version
  stats   uri       /stats
  stats   refresh   30s
  stats   realm     Haproxy\ Statistics
  stats   auth      admin:admin

frontend k8s-master
  bind 0.0.0.0:8443
  bind 127.0.0.1:8443
  mode tcp
  option tcplog
  tcp-request inspect-delay 5s
  default_backend k8s-master

backend k8s-master
  mode tcp
  option tcplog
  option tcp-check
  balance roundrobin
  default-server inter 10s downinter 5s rise 2 fall 2 slowstart 60s maxconn 250 maxqueue 256 weight 100
  server kubernetes-master-01    192.168.15.51:6443  check inter 2000 fall 2 rise 2 weight 100
  server kubernetes-master-02    192.168.15.52:6443  check inter 2000 fall 2 rise 2 weight 100
  server kubernetes-master-03    192.168.15.53:6443  check inter 2000 fall 2 rise 2 weight 100
EOF

##########################################
端口与上面管理员配置文件一致
frontend k8s-master
  bind 0.0.0.0:8443
  bind 127.0.0.1:8443
weight 100  权重

##########################################

[root@sg-14 /etc/keepalived]# systemctl enable --now haproxy.service 
Created symlink from /etc/systemd/system/multi-user.target.wants/haproxy.service to /usr/lib/systemd/system/haproxy.service.

8、部署TLS

apiserver 动态签署颁发到Node节点，实现证书签署自动化

创建集群配置文件

# 只需要在一台master节点上执行
export KUBE_APISERVER="https://192.168.0.214:8443"

# 设置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=kubelet-bootstrap.kubeconfig

# 设置客户端认证参数,此处token必须用上叙token.csv中的token
kubectl config set-credentials "kubelet-bootstrap" \
  --token=a0efb61e41a2f006bbe49f1fc5591785 \  # 使用自己的token.csv里面的token
  --kubeconfig=kubelet-bootstrap.kubeconfig

# 设置上下文参数（在上下文参数中将集群参数和用户参数关联起来）
kubectl config set-context default \
  --cluster=kubernetes \
  --user="kubelet-bootstrap" \
  --kubeconfig=kubelet-bootstrap.kubeconfig

# 配置默认上下文
kubectl config use-context default --kubeconfig=kubelet-bootstrap.kubeconfig


###########################################
token:cat /opt/cert/k8s/token.csv
a0efb61e41a2f006bbe49f1fc5591785,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
###########################################

颁发证书

# 颁发集群配置文件
[root@sg-14 k8s]# for i in sg-14; do scp kubelet-bootstrap.kubeconfig root@$i:/etc/kubernetes/cfg/; done

创建TLS低权限用户

kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node_bootstrapper \
--user=kubelet_bootstrap

9、部署contorller-manager

contorller-manager组件作用：监控整个集群

编辑配置文件

# 需要在三台master节点上执行
cat > /etc/kubernetes/cfg/kube-controller-manager.conf << EOF
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/var/log/kubernetes \\
--leader-elect=true \\
--cluster-name=kubernetes \\
--bind-address=127.0.0.1 \\
--allocate-node-cidrs=true \\
--cluster-cidr=10.244.0.0/12 \\
--service-cluster-ip-range=10.96.0.0/16 \\
--cluster-signing-cert-file=/etc/kubernetes/ssl/ca.pem \\
--cluster-signing-key-file=/etc/kubernetes/ssl/ca-key.pem  \\
--root-ca-file=/etc/kubernetes/ssl/ca.pem \\
--service-account-private-key-file=/etc/kubernetes/ssl/ca-key.pem \\
--kubeconfig=/etc/kubernetes/cfg/kube-controller-manager.kubeconfig \\
--tls-cert-file=/etc/kubernetes/ssl/kube-controller-manager.pem \\
--tls-private-key-file=/etc/kubernetes/ssl/kube-controller-manager-key.pem \\
--experimental-cluster-signing-duration=87600h0m0s \\
--controllers=*,bootstrapsigner,tokencleaner \\
--use-service-account-credentials=true \\
--node-monitor-grace-period=10s \\
--horizontal-pod-autoscaler-use-rest-clients=true"
EOF

注册服务

# 需要在三台master节点上执行
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-controller-manager.conf
ExecStart=/usr/local/bin/kube-controller-manager \$KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF

启动

[root@sg-14 ~]# systemctl daemon-reload 
[root@sg-14 ~]# systemctl enable --now kube-controller-manager.service 
[root@sg-14 ~]# systemctl status kube-controller-manager.service

10、部署kube-scheduler

编写配置文件

# 三台master机器上都需要执行
cat > /etc/kubernetes/cfg/kube-scheduler.conf << EOF
KUBE_SCHEDULER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/var/log/kubernetes \\
--kubeconfig=/etc/kubernetes/cfg/kube-scheduler.kubeconfig \\
--leader-elect=true \\
--master=http://127.0.0.1:8080 \\
--bind-address=127.0.0.1 "
EOF

######################################
--master=http://127.0.0.1:8080 \\操作集群入口的地方
######################################

注册服务

# 三台master节点上都需要执行
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-scheduler.conf
ExecStart=/usr/local/bin/kube-scheduler \$KUBE_SCHEDULER_OPTS
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF

启动

[root@sg-14 ~]# systemctl daemon-reload 
[root@sg-14 ~]# systemctl enable --now kube-scheduler.service 
[root@sg-14 ~]# systemctl status kube-scheduler.service

查看集群状态

[root@sg-14 ~]# kubectl get cs

11、部署kubelet服务

创建kubelet服务配置文件

# 需要在三台master节点上执行
KUBE_HOSTNAME=`hostname`

cat > /etc/kubernetes/cfg/kubelet.conf << EOF
KUBELET_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/var/log/kubernetes \\
--hostname-override=${KUBE_HOSTNAME} \\
--container-runtime=docker \\
--kubeconfig=/etc/kubernetes/cfg/kubelet.kubeconfig \\
--bootstrap-kubeconfig=/etc/kubernetes/cfg/kubelet-bootstrap.kubeconfig \\
--config=/etc/kubernetes/cfg/kubelet-config.yml \\
--cert-dir=/etc/kubernetes/ssl \\
--image-pull-progress-deadline=15m \\
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/k8sos/pause:3.2"
EOF

创建kubelet-config.yaml

# 需要在三台master节点上执行
# KUBE_HOSTNAME=`hostname -i`
KUBE_HOSTNAME="192.168.0.214"

cat > /etc/kubernetes/cfg/kubelet-config.yml << EOF
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: ${KUBE_HOSTNAME}
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.96.0.2
clusterDomain: cluster.local
failSwapOn: false
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 2m0s
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/ssl/ca.pem
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 5m0s
    cacheUnauthorizedTTL: 30s
evictionHard:
  imagefs.available: 15%
  memory.available: 100Mi
  nodefs.available: 10%
  nodefs.inodesFree: 5%
maxOpenFiles: 1000000
maxPods: 110
EOF

注册kubelet的服务

# 需要在三台master节点上执行
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
After=docker.service

[Service]
EnvironmentFile=/etc/kubernetes/cfg/kubelet.conf
ExecStart=/usr/local/bin/kubelet \$KUBELET_OPTS
Restart=on-failure
RestartSec=10
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

启动

[root@sg-14 ~]# systemctl daemon-reload
[root@sg-14 ~]# systemctl enable --now kubelet.service
[root@sg-14 ~]# systemctl status kubelet.service

12、部署kube-proxy

创建配置文件

# 需要在三台master节点上执行
cat > /etc/kubernetes/cfg/kube-proxy.conf << EOF
KUBE_PROXY_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/var/log/kubernetes \\
--config=/etc/kubernetes/cfg/kube-proxy-config.yml"
EOF

创建kube-proxy-config.yml

# 需要在三台master节点上执行
# KUBE_HOSTNAME=`hostname -i`
KUBE_HOSTNAME="192.168.0.214"
HOSTNAME=`hostname`
cat > /etc/kubernetes/cfg/kube-proxy-config.yml << EOF
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: ${KUBE_HOSTNAME}
healthzBindAddress: ${KUBE_HOSTNAME}:10256
metricsBindAddress: ${KUBE_HOSTNAME}:10249
clientConnection:
  burst: 200
  kubeconfig: /etc/kubernetes/cfg/kube-proxy.kubeconfig
  qps: 100
hostnameOverride: ${HOSTNAME}
clusterCIDR: 10.96.0.0/16
enableProfiling: true
mode: "ipvs"
kubeProxyIPTablesConfiguration:
  masqueradeAll: false
kubeProxyIPVSConfiguration:
  scheduler: rr
  excludeCIDRs: []
EOF

注册服务

# 需要在三台master节点上执行
cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Proxy
After=network.target

[Service]
EnvironmentFile=/etc/kubernetes/cfg/kube-proxy.conf
ExecStart=/usr/local/bin/kube-proxy \$KUBE_PROXY_OPTS
Restart=on-failure
RestartSec=10
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

启动

[root@sg-14 ~]# systemctl daemon-reload
[root@sg-14 ~]# systemctl enable --now kube-proxy.service 
[root@sg-14 ~]# systemctl status kube-proxy.service

13、加入集群节点

查看集群节点加入请求

# 只需要在一台节点上执行即可
[root@k8s-m-01 /opt/cert/k8s]# kubectl get csr
NAME                                                   AGE    SIGNERNAME                                    REQUESTOR           CONDITION
node-csr-5AWYEWZ0DkF4DzHTOP00M2_Ne6on7XMwvryxbwsh90M   6m3s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending
node-csr-8_Rjm9D7z-04h400v_8RDHHCW3UGILeSRhxx-KkIWNI   6m3s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending
node-csr-wlHMJiNAkMuPsQPoD6dan8QF4AIlm-x_hVYJt9DukIg   6m2s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending

批准加入

# 只需要在一台节点上执行即可
[root@k8s-m-01 /opt/cert/k8s]# kubectl certificate approve `kubectl get csr | grep "Pending" | awk '{print $1}'`
certificatesigningrequest.certificates.k8s.io/node-csr-5AWYEWZ0DkF4DzHTOP00M2_Ne6on7XMwvryxbwsh90M approved
certificatesigningrequest.certificates.k8s.io/node-csr-8_Rjm9D7z-04h400v_8RDHHCW3UGILeSRhxx-KkIWNI approved
certificatesigningrequest.certificates.k8s.io/node-csr-wlHMJiNAkMuPsQPoD6dan8QF4AIlm-x_hVYJt9DukIg approved
[root@k8s-m-01 /opt/cert/k8s]# kubectl get nodes
NAME       STATUS   ROLES    AGE   VERSION
k8s-m-01   Ready    <none>   13s   v1.18.8
k8s-m-02   Ready    <none>   12s   v1.18.8
k8s-m-03   Ready    <none>   12s   v1.18.8

14、安装网络插件

本次选择使用flannel网络插件

下载flannel安装包并安装

# 只需要在一台节点上执行即可
[root@k8s-m-01 /opt/data]# tar -xf flannel-v0.11.0-linux-amd64.tar.gz
[root@k8s-m-01 /opt/data]# for i in m1 m2 m3;do
> scp flanneld mk-docker-opts.sh root@$i:/usr/local/bin/
> done

将flannel配置写入集群数据库

# 只需要在一台节点上执行即可
etcdctl \
--ca-file=/etc/etcd/ssl/ca.pem \
--cert-file=/etc/etcd/ssl/etcd.pem \
--key-file=/etc/etcd/ssl/etcd-key.pem \
--endpoints="https://192.168.15.51:2379,https://192.168.15.52:2379,https://192.168.15.53:2379" \
mk /coreos.com/network/config '{"Network":"10.244.0.0/12", "SubnetLen": 21, "Backend": {"Type": "vxlan", "DirectRouting": true}}'

注册flannel服务

# 需要在三台机器运行
cat > /usr/lib/systemd/system/flanneld.service << EOF
[Unit]
Description=Flanneld address
After=network.target
After=network-online.target
Wants=network-online.target
After=etcd.service
Before=docker.service

[Service]
Type=notify
ExecStart=/usr/local/bin/flanneld \\
  -etcd-cafile=/etc/etcd/ssl/ca.pem \\
  -etcd-certfile=/etc/etcd/ssl/etcd.pem \\
  -etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
  -etcd-endpoints=https://192.168.15.51:2379,https://192.168.15.52:2379,https://192.168.15.53:2379 \\
  -etcd-prefix=/coreos.com/network \\
  -ip-masq
ExecStartPost=/usr/local/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=always
RestartSec=5
StartLimitInterval=0
[Install]
WantedBy=multi-user.target
RequiredBy=docker.service
EOF

修改docker启动文件

# 让flannel接管docker网络
sed -i '/ExecStart/s/\(.*\)/#\1/' /usr/lib/systemd/system/docker.service
sed -i '/ExecReload/a ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run/containerd/containerd.sock' /usr/lib/systemd/system/docker.service
sed -i '/ExecReload/a EnvironmentFile=-/run/flannel/subnet.env' /usr/lib/systemd/system/docker.service

启动

# 先启动flannel,再启动docker
[root@k8s-m-01 ~]# systemctl daemon-reload 
[root@k8s-m-01 ~]# systemctl enable --now flanneld.service 
Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.
Created symlink from /etc/systemd/system/docker.service.requires/flanneld.service to /usr/lib/systemd/system/flanneld.service.
[root@k8s-m-01 ~]# systemctl restart docker

验证集群网络

# 集群节点互ping对方的flannel网络

15、安装集群DNS

# 只需要在一台节点上执行即可
# 下载DNS安装配置文件包
[root@k8s-m-01 ~]# wget https://github.com/coredns/deployment/archive/refs/heads/master.zip
[root@k8s-m-01 ~]# unzip master.zip
[root@k8s-m-01 ~]# cd deployment-master/kubernetes

# 执行部署命令
[root@k8s-m-01 ~/deployment-master/kubernetes]# ./deploy.sh -i 10.96.0.2 -s | kubectl apply -f -

# 验证集群DNS
[root@k8s-m-01 ~/deployment-master/kubernetes]# kubectl get pods -n kube-system
NAME                      READY   STATUS    RESTARTS   AGE
coredns-6ff445f54-m28gw   1/1     Running   0          48s

验证集群

# 绑定一下超管用户（只需要在一台服务器上执行即可）
[root@k8s-m-01 ~/deployment-master/kubernetes]# kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=kubernetes
clusterrolebinding.rbac.authorization.k8s.io/cluster-system-anonymous created

# 验证集群DNS和集群网络成功
[root@k8s-m-01 ~/deployment-master/kubernetes]# kubectl run test -it --rm --image=busybox:1.28.3
If you don't see a command prompt, try pressing enter.
/ # nslookup kubernetes
Server:    10.96.0.2
Address 1: 10.96.0.2 kube-dns.kube-system.svc.cluster.local

Name:      kubernetes
Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local

posted @ 2021-11-08 14:18 Jeff的技术栈阅读(328) 评论(0) 编辑收藏举报

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Jeff的技术栈

生命在于运动，学习在于坚持！！！

k8s二进制部署

插件

集群角色

master节点部署插件

node节点部署插件

二进制部署系统准备(所有节点)

1、节点规划

2、插件规划

3、系统优化

4、安装docker

二进制部署(开始)

证书

1、集群证书（master节点）

2、生成根证书(master节点)

根证书配置文件

生成根证书请求文件

开始生成根证书

部署ETCD数据库集群

1、节点规划(所有msater节点)

2、创建ETCD集群证书

3、生成ETCD证书

4.分发ETCD证书

5、部署ETCD

6、注册ETCD服务

7、测试ETCD服务

部署master节点

1、集群规划

2、ca证书

生成根证书配置文件

生成根证书请求文件

生成ca根证书

3、创建集群普通证书

创建kube-apiserver的证书配置文件

创建controller-manager的证书配置文件

创建kube-scheduler的证书配置文件

创建kube-proxy的证书配置文件

创建集群管理员证书配置文件

创建kubelet的证书配置文件

创建TLS bootstrapping证书

4、颁发证书

5、下载安装包和编辑配置文件

下载

创建kube-controller-manager.kubeconfig管理员集群配置文件

创建kube-scheduler.kubeconfig集群配置文件

创建kube-proxy.kubeconfig集群配置文件

创建超级管理员的集群配置文件

6、颁发集群配置文件

7、创建集群token

7、部署各个组件

注册创建kube-apiserver配置文件

对kube-apiserver做高可用

8、部署TLS

创建集群配置文件

颁发证书

创建TLS低权限用户

9、部署contorller-manager

编辑配置文件

注册服务

启动

10、部署kube-scheduler

编写配置文件

注册服务

启动

查看集群状态

11、部署kubelet服务

创建kubelet服务配置文件

创建kubelet-config.yaml

注册kubelet的服务

启动

12、部署kube-proxy

创建配置文件

创建kube-proxy-config.yml

注册服务

启动

13、加入集群节点

查看集群节点加入请求

批准加入

14、安装网络插件