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kubernetes-1.25.6二进制部署方式

 更新时间：2024年07月30日 11:10:26   作者：木华思流年  
这篇文章主要介绍了kubernetes-1.25.6二进制部署方式,具有很好的参考价值,希望对大家有所帮助,如有错误或未考虑完全的地方,望不吝赐教

1. 基础环境

主机名称ip地址
master110.66.6.2
node110.66.6.4
node210.66.6.5

说明：

master节点为2台以nginx为代理实现高可用

系统使用ubuntu 20.04

2. 基础环境配置

通过公钥做ssh免密.

2.1 所有节点配置hosts

10.66.6.2 master1
10.66.6.4 node1
10.66.6.5 node2

2.2 关闭防火墙,selinux,dnsmasq,swap

#关闭防火墙
systemctl disable --now firewalld
#关闭dnsmasq
systemctl disable --now dnsmasq
#关闭postfix
systemctl  disable --now postfix
#关闭NetworkManager
systemctl disable --now NetworkManager
#关闭selinux
sed -ri 's/(^SELINUX=).*/\1disabled/' /etc/selinux/config
setenforce 0
#关闭swap
sed -ri 's@(^.*swap *swap.*0 0$)@#\1@' /etc/fstab
swapoff -a

2.3 配置时间同步

#安装ntpdate
apt-get install ntpdate -y

#执行同步，可以使用自己的ntp服务器如果没有
ntpdate ntp1.aliyun.com

#添加定时任务
crontab -e
0 */1 * * * ntpdate ntp1.aliyun.com

2.4 节点修改资源限制

cat > /etc/security/limits.conf <<EOF
*       soft        core        unlimited
*       hard        core        unlimited
*       soft        nproc       1000000
*       hard        nproc       1000000
*       soft        nofile      1000000
*       hard        nofile      1000000
*       soft        memlock     32000
*       hard        memlock     32000
*       soft        msgqueue    8192000
EOF

2.5 安装基本软件

apt-get install ipvsadm ipset conntrack sysstat libseccomp psmisc vim net-tools nfs-kernel-server  telnet lvm2 git tar curl -y

2.6 升级系统内核

#查看系统内核
uname -r

#查看软件库中内核
sudo apt list | grep linux-generic*

#下载内核
apt-get install linux-generic-hwe-20.04-edge/focal-updates

#下载脚本
wget https://raw.githubusercontent.com/pimlie/ubuntu-mainline-kernel.sh/master/ubuntu-mainline-kernel.sh

#把脚本放在可执行路径
install ubuntu-mainline-kernel.sh /usr/local/bin/

#检查最新的可用内核版本
ubuntu-mainline-kernel.sh -c

#获得最新版本并确认这就是您想要安装在系统上的版本之后，运行
ubuntu-mainline-kernel.sh -i

#重启服务器后确认
reboot
uname -rs

2.7 修改内核参数

cat >/etc/sysctl.conf<<EOF
net.ipv4.tcp_keepalive_time=600
net.ipv4.tcp_keepalive_intvl=30
net.ipv4.tcp_keepalive_probes=10
net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.default.disable_ipv6=1
net.ipv6.conf.lo.disable_ipv6=1
net.ipv4.neigh.default.gc_stale_time=120
net.ipv4.conf.all.rp_filter=0 # 默认为1，系统会严格校验数据包的反向路径，可能导致丢包
net.ipv4.conf.default.rp_filter=0
net.ipv4.conf.default.arp_announce=2
net.ipv4.conf.lo.arp_announce=2
net.ipv4.conf.all.arp_announce=2
net.ipv4.ip_local_port_range= 45001 65000
net.ipv4.ip_forward=1
net.ipv4.tcp_max_tw_buckets=6000
net.ipv4.tcp_syncookies=1
net.ipv4.tcp_synack_retries=2
net.bridge.bridge-nf-call-ip6tables=1
net.bridge.bridge-nf-call-iptables=1
net.netfilter.nf_conntrack_max=2310720
net.ipv6.neigh.default.gc_thresh1=8192
net.ipv6.neigh.default.gc_thresh2=32768
net.ipv6.neigh.default.gc_thresh3=65536
net.core.netdev_max_backlog=16384 # 每CPU网络设备积压队列长度
net.core.rmem_max = 16777216 # 所有协议类型读写的缓存区大小
net.core.wmem_max = 16777216
net.ipv4.tcp_max_syn_backlog = 8096 # 第一个积压队列长度
net.core.somaxconn = 32768 # 第二个积压队列长度
fs.inotify.max_user_instances=8192 # 表示每一个real user ID可创建的inotify instatnces的数量上限，默认128.
fs.inotify.max_user_watches=524288 # 同一用户同时可以添加的watch数目，默认8192。
fs.file-max=52706963
fs.nr_open=52706963
kernel.pid_max = 4194303
net.bridge.bridge-nf-call-arptables=1
vm.swappiness=0 # 禁止使用 swap 空间，只有当系统 OOM 时才允许使用它
vm.overcommit_memory=1 # 不检查物理内存是否够用
vm.panic_on_oom=0 # 开启 OOM
vm.max_map_count = 262144
EOF

2.8 加载ipvs模块

cat >/etc/modules-load.d/ipvs.conf <<EOF
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_nq
ip_vs_sed
ip_vs_ftp
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
EOF

systemctl enable --now systemd-modules-load.service

#重启服务器执行检查
lsmod | grep -e ip_vs -e nf_conntrack

3. 软件包准备

以下均为github下载地址

  • kubernetes 1.25.6 地址
https://dl.k8s.io/v1.25.6/kubernetes-server-linux-amd64.tar.gz
  • etcd 地址
https://github.com/etcd-io/etcd/releases/download/v3.5.7/etcd-v3.5.7-linux-amd64.tar.gz
  • docker-ce 地址
https://github.com/containerd/containerd/releases
  • cri-docker 地址
https://github.com/Mirantis/cri-dockerd/releases
  • containerd 地址
https://github.com/containerd/containerd/releases
  • cfssl 地址
https://github.com/cloudflare/cfssl/releases

4. 安装docker,cri-docker

4.1 安装docker-ce

tar xf docker-23.0.1.tgz

cp docker/* /usr/bin

container启动文件

cat > /usr/lib/systemd/system/containerd.service << EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target

[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=1048576
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target
EOF

docker 启动文件

cat > /usr/lib/systemd/system/docker.service << EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service

[Service]
Type=notify
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP 
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process
OOMScoreAdjust=-500

[Install]
WantedBy=multi-user.target
EOF

docker的socket文件

cat > /usr/lib/systemd/system/ << EOF
[Unit]
Description=Docker Socket for the API

[Socket]
ListenStream=/var/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker

[Install]
WantedBy=sockets.target
EOF

创建docker配置文件

cat > /etc/docker/daemon.json << EOF
{
   "exec-opts": ["native.cgroupdriver=systemd"]
}
EOF

启动添加开机自启动

groupadd docker 
systemctl enable --now containerd.service
systemctl enable --now docker.socket
systemctl enable --now docker.service

4.2 安装cri-docker

tar xf cri-dockerd-0.3.1.amd64.tgz

cp cri-dockerd/* /usr/bin

创建启动文件

cat > /usr/lib/systemd/system/cri-docker.service  << EOF
[Unit]
Description=CRI Interface for Docker Application Container Engine
Documentation=https://docs.mirantis.com
After=network-online.target firewalld.service docker.service
Wants=network-online.target
Requires=cri-docker.socket

[Service]
Type=notify
ExecStart=/usr/bin/cri-dockerd --container-runtime-endpoint fd:// --network-plugin=cni --pod-infra-container-image=kubernetes/pause:latest
ExecReload=/bin/kill -s HUP 
TimeoutSec=0
RestartSec=2
Restart=always

# Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229.
# Both the old, and new location are accepted by systemd 229 and up, so using the old location
# to make them work for either version of systemd.
StartLimitBurst=3

# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd 230.
# Both the old, and new name are accepted by systemd 230 and up, so using the old name to make
# this option work for either version of systemd.
StartLimitInterval=60s

# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity

# Comment TasksMax if your systemd version does not support it.
# Only systemd 226 and above support this option.
TasksMax=infinity
Delegate=yes
KillMode=process

[Install]
WantedBy=multi-user.target
EOF

创建cri-docker socker文件

cat > /usr/lib/systemd/system/cri-docker.socket << EOF
[Unit]
Description=CRI Docker Socket for the API
PartOf=cri-docker.service

[Socket]
ListenStream=%t/cri-dockerd.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker

[Install]
WantedBy=sockets.target
EOF

添加开机自启动,并启动

systemctl enable --now cri-docker.socket
systemctl enable --now cri-docker

4.3 安装containerd

tar xf containerd-1.6.19-linux-amd64.tar.gz -C /
cat > /usr/lib/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target

[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=1048576
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target
EOF
systemctl enable --now  containerd.service

添加配置重启

mkdir /etc/containerd
/usr/local/bin/containerd config default > /etc/containerd/config.toml

systemctl restart containerd

4.4 安装crictl 客户工具

#解压
tar xf crictl-v1.22.0-linux-amd64.tar.gz -C /usr/bin/
#生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
EOF
#测试
crictl info

4.5 安装cfssl工具

#主节点操作

tar xf cfssl-1.6.3.tar.gz -C /usr/bin

mkdir /opt/pki/{etcd,kubernetes} -p

5. 生成kubernetes集群证书

在主节点操作

5.1 生成etcd的ca证书

mkdir /opt/pki/etcd/ -p
cd /opt/pki/etcd/
#创建etcd证书的ca
mkdir ca
#生成etcd证书ca配置文件与申请文件
cd ca/

生成配置文件

cat > ca-config.json <<EOF
{
    "signing": {
         "default": {
             "expiry": "87600h"
        },
         "profiles": {
             "etcd": {
                 "expiry": "87600h",
                 "usages": [
                     "signing",
                     "key encipherment",
                     "server auth",
                     "client auth"
                 ]
             }
         }
     }
}
EOF
#生成申请文件
cat > ca-csr.json <<EOF
{
  "CA":{"expiry":"87600h"},
  "CN": "etcd-cluster",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "TS": "Beijing",
      "L": "Beijing",
      "O": "etcd-cluster",
      "OU": "System"
    }
  ]
}
EOF
#生成ca证书
cfssl gencert -initca ca-csr.json | cfssljson -bare ca

生成etcd服务端证书

cat > etcd-server-csr.json << EOF
{
  "CN": "etcd-server",
  "hosts": [
     "10.66.6.2",
     "10.66.6.3",
     "10.66.6.4",
     "10.66.6.5",
     "10.66.6.6",
     "127.0.0.1"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "TS": "Beijing",
      "L": "Beijing",
      "O": "etcd-server",
      "OU": "System"
    }
  ]
}
EOF
#生成证书
cfssl gencert \
  -ca=ca/ca.pem \
  -ca-key=ca/ca-key.pem \
  -config=ca/ca-config.json \
  -profile=etcd \
  etcd-server-csr.json | cfssljson -bare etcd-server

生成etcd客户端证书

#生成etcd证书申请文件
cd /opt/pki/etcd/
cat > etcd-client-csr.json << EOF
{
  "CN": "etcd-client",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "TS": "Beijing",
      "L": "Beijing",
      "O": "etcd-client",
      "OU": "System"
    }
  ]
}
EOF
#生成证书
cfssl gencert \
  -ca=ca/ca.pem \
  -ca-key=ca/ca-key.pem \
  -config=ca/ca-config.json \
  -profile=etcd \
  etcd-client-csr.json | cfssljson -bare etcd-client

拷贝证书到master和node节点

for i in $master;do
  ssh $i "mkdir /etc/etcd/ssl -p"
  scp /opt/pki/etcd/ca/ca.pem /opt/pki/etcd/{etcd-server.pem,etcd-server-key.pem,etcd-client.pem,etcd-client-key.pem} $i:/etc/etcd/ssl/
done

5.2 创建kubernetes各组件证书

5.2.1 创建kubernetes的ca

mkdir /opt/pki/kubernetes/ -p
cd /opt/pki/kubernetes/
mkdir ca
cd ca

创建ca配置文件

cat > ca-config.json <<EOF
{
    "signing": {
         "default": {
             "expiry": "87600h"
        },
         "profiles": {
             "kubernetes": {
                 "expiry": "87600h",
                 "usages": [
                     "signing",
                     "key encipherment",
                     "server auth",
                     "client auth"
                 ]
             }
         }
     }
}
EOF

生成ca申请文件

cat > ca-csr.json <<EOF
{
  "CA":{"expiry":"87600h"},
  "CN": "kubernetes",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "TS": "Beijing",
      "L": "Beijing",
      "O": "kubernetes",
      "OU": "System"
    }
  ]
}
EOF

生成ca证书

cfssl gencert -initca ca-csr.json | cfssljson -bare ca

5.3 创建kueb-apiserver证书

mkdir /opt/pki/kubernetes/kube-apiserver -p
cd /opt/pki/kubernetes/kube-apiserver

生成申请文件

cat > kube-apiserver-csr.json < EOF
< EOF
{
  "CN": "kube-apiserver",
  "hosts": [
    "127.0.0.1",
    "10.66.6.2",
    "10.66.6.3",
    "10.66.6.4",
    "10.66.6.5",
    "10.66.6.6",
    "10.66.6.7",
    "10.200.0.1",
    "kubernetes",
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.cluster",
    "kubernetes.default.svc.cluster.local"
   ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "TS": "Beijing",
      "L": "Beijing",
      "O": "kube-apiserver",
      "OU": "System"
    }
  ]
}
EOF

生成证书

cfssl gencert \
  -ca=../ca/ca.pem \
  -ca-key=../ca/ca-key.pem \
  -config=../ca/ca-config.json \
  -profile=kubernetes \
  kube-apiserver-csr.json | cfssljson -bare  kube-apiserver
for i in master;do
   ssh $i "mkdir /etc/kubernetes/pki -p"
   scp /opt/pki/kubernetes/ca/{ca.pem,ca-key.pem} /opt/pki/kubernetes/kube-apiserver/{kube-apiserver-key.pem,kube-apiserver.pem} $i:/etc/kubernetes/pki
done

#拷贝证书到node节点

master="node1 node2"
for i in $master;do
   ssh $i "mkdir /etc/kubernetes/pki -p"
   scp /opt/pki/kubernetes/ca/ca.pem $i:/etc/kubernetes/pki
done

5.4 创建proxy-client证书以及ca

mkdir /opt/pki/proxy-client
cd /opt/pki/proxy-client

生成ca配置文件

cat > front-proxy-ca-csr.json <<EOF
{
  "CA":{"expiry":"87600h"},
  "CN": "kubernetes",
  "key": {
     "algo": "rsa",
     "size": 2048
  }
}
EOF

生成ca文件

cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare front-proxy-ca

生成客户端证书申请文件

cat > front-proxy-client-csr.json <<EOF
{
  "CN": "front-proxy-client",
  "key": {
     "algo": "rsa",
     "size": 2048
  }
}
EOF

生成证书

cfssl gencert \
-ca=front-proxy-ca.pem \
-ca-key=front-proxy-ca-key.pem  \
-config=../kubernetes/ca/ca-config.json   \
-profile=kubernetes front-proxy-client-csr.json | cfssljson -bare front-proxy-client

拷贝证书到节点

for i in $master;do
   scp /opt/pki/proxy-client/{front-proxy-ca.pem,front-proxy-client.pem,front-proxy-client-key.pem} $i:/etc/kubernetes/pki
done
for i in $node;do
  scp /opt/pki/proxy-client/front-proxy-ca.pem $i:/etc/kubernetes/pki
done

5.5 创建kube-controller-manager证书与认证文件

mkdir /opt/pki/kubernetes/kube-controller-manager
cd /opt/pki/kubernetes/kube-controller-manager

生成配置文件

cat > kube-controller-manager-csr.json <<EOF
{
  "CN": "system:kube-controller-manager",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "TS": "Beijing",
      "L": "Beijing",
      "O": "system:kube-controller-manager",
      "OU": "System"
    }
  ]
}
EOF

生成证书文件

cfssl gencert \
   -ca=../ca/ca.pem \
   -ca-key=../ca/ca-key.pem \
   -config=../ca/ca-config.json \
   -profile=kubernetes \
   kube-controller-manager-csr.json | cfssljson -bare kube-controller-manager

生成配置文件

kubectl config set-cluster kubernetes \
    --certificate-authority=../ca/ca.pem \
    --embed-certs=true \
    --server=https://127.0.0.1:6443 \
    --kubeconfig=kube-controller-manager.kubeconfig

kubectl config set-credentials system:kube-controller-manager \
    --client-certificate=kube-controller-manager.pem \
    --client-key=kube-controller-manager-key.pem \
    --embed-certs=true \
    --kubeconfig=kube-controller-manager.kubeconfig

kubectl config set-context default \
    --cluster=kubernetes \
    --user=system:kube-controller-manager \
    --kubeconfig=kube-controller-manager.kubeconfig

kubectl config use-context default --kubeconfig=kube-controller-manager.kubeconfig

拷贝证书到节点

for i in $master;do
   scp /opt/pki/kubernetes/kube-controller-manager/kube-controller-manager.kubeconfig $i:/etc/kubernetes
done

5.6 生成kube-scheduler证书文件

mkdir /opt/pki/kubernetes/kube-scheduler
cd /opt/pki/kubernetes/kube-scheduler

生成申请文件

cat > kube-scheduler-csr.json <<EOF
{
  "CN": "system:kube-scheduler",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "TS": "Beijing",
      "L": "Beijing",
      "O": "system:kube-scheduler",
      "OU": "System"
    }
  ]
}
EOF

生成证书

cfssl gencert \
   -ca=../ca/ca.pem \
   -ca-key=../ca/ca-key.pem \
   -config=../ca/ca-config.json \
   -profile=kubernetes \
   kube-scheduler-csr.json | cfssljson -bare kube-scheduler

生成配置文件

kubectl config set-cluster kubernetes \
    --certificate-authority=../ca/ca.pem \
    --embed-certs=true \
    --server=https://127.0.0.1:6443 \
    --kubeconfig=kube-scheduler.kubeconfig

  kubectl config set-credentials system:kube-scheduler \
    --client-certificate=kube-scheduler.pem \
    --client-key=kube-scheduler-key.pem \
    --embed-certs=true \
    --kubeconfig=kube-scheduler.kubeconfig

  kubectl config set-context default \
    --cluster=kubernetes \
    --user=system:kube-scheduler \
    --kubeconfig=kube-scheduler.kubeconfig

  kubectl config use-context default --kubeconfig=kube-scheduler.kubeconfig

拷贝证书到节点

for i in $master;do
   scp /opt/pki/kubernetes/kube-scheduler/kube-scheduler.kubeconfig $i:/etc/kubernetes
done

5.7.生成kubernetes集群管理员证书

mkdir /opt/pki/kubernetes/admin
cd /opt/pki/kubernetes/admin

生成证书申请文件

cat > admin-csr.json <<EOF
{
  "CN": "admin",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "TS": "Beijing",
      "L": "Beijing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
EOF

生成证书

cfssl gencert \
   -ca=../ca/ca.pem \
   -ca-key=../ca/ca-key.pem \
   -config=../ca/ca-config.json \
   -profile=kubernetes \
   admin-csr.json | cfssljson -bare admin

生成配置文件

kubectl config set-cluster kubernetes \
    --certificate-authority=../ca/ca.pem \
    --embed-certs=true \
    --server=https://127.0.0.1:6443 \
    --kubeconfig=admin.kubeconfig

  kubectl config set-credentials admin \
    --client-certificate=admin.pem \
    --client-key=admin-key.pem \
    --embed-certs=true \
    --kubeconfig=admin.kubeconfig

  kubectl config set-context default \
    --cluster=kubernetes \
    --user=admin \
    --kubeconfig=admin.kubeconfig

  kubectl config use-context default --kubeconfig=admin.kubeconfig

6. etcd 部署

6.1 安装etcd

tar xf etcd-v3.5.5-linux-amd64.tar.gz
cp etcd-v3.5.5-linux-amd64/etcd* /usr/bin/
rm -rf etcd-v3.5.5-linux-amd64

创建配置文件

cat > /etc/etcd/etcd.config.yml <<EOF
name: 'etcd-1'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://10.66.6.2:2380'
listen-client-urls: 'https://10.66.6.2:2379,https://127.0.0.1:2379'  
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://10.66.6.2:2380'
advertise-client-urls: 'https://10.66.6.2:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'etcd-1=https://10.66.6.2:2380' #配置etcd节点根据自己情况
initial-cluster-token: 'etcd-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
  cert-file: '/etc/etcd/ssl/etcd-server.pem'
  key-file: '/etc/etcd/ssl/etcd-server-key.pem'
  client-cert-auth: true
  trusted-ca-file: '/etc/etcd/ssl/ca.pem'
  auto-tls: true
peer-transport-security:
  cert-file: '/etc/etcd/ssl/etcd-server.pem'
  key-file: '/etc/etcd/ssl/etcd-server-key.pem'
  peer-client-cert-auth: true
  trusted-ca-file: '/etc/etcd/ssl/ca.pem'
  auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF

生成启动文件

cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target

[Service]
Type=notify
ExecStart=/usr/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
Alias=etcd3.service
EOF
systemctl enable --now etcd

6.2 配置etcdctl 客户端工具

​
#设置全局变量
cat > /etc/profile.d/etcdctl.sh <<EOF
#!/bin/bash
export ETCDCTL_API=3
export ETCDCTL_ENDPOINTS=https://127.0.0.1:2379
export ETCDCTL_CACERT=/etc/etcd/ssl/ca.pem
export ETCDCTL_CERT=/etc/etcd/ssl/etcd-client.pem
export ETCDCTL_KEY=/etc/etcd/ssl/etcd-client-key.pem
EOF
#生效
source /etc/profile
#验证集群状态
etcdctl member list

​

7. 部署kubernetes

分发二进制文件

tar xf kubernetes-server-linux-amd64.tar.gz
#分发master组件
for i in $master;do
  scp kubernetes/server/bin/{kubeadm,kube-apiserver,kube-controller-manager,kube-scheduler,kube-proxy,kubelet,kubectl} $i:/usr/bin
done
#分发node组件
for i in $node;do
  scp kubernetes/server/bin/{kube-proxy,kubelet} $i:/usr/bin
done

7.1 安装kube-apiserver

#创建ServiceAccount Key
openssl genrsa -out /etc/kubernetes/pki/sa.key 2048
openssl rsa -in /etc/kubernetes/pki/sa.key -pubout -out /etc/kubernetes/pki/sa.pub

#分发master组件
for i in $master;do
  scp /etc/kubernetes/pki/{sa.pub,sa.key} $i:/etc/kubernetes/pki/
done

创建service文件

a=`ifconfig eth0 | awk -rn 'NR==2{print $2}'`
cat > /etc/systemd/system/kube-apiserver.service <<EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/bin/kube-apiserver \\
      --v=2  \\
      --logtostderr=true  \\
      --allow-privileged=true  \\
      --bind-address=$a  \\
      --secure-port=6443  \\
      --advertise-address=$a \\
      --service-cluster-ip-range=10.200.0.0/16  \\
      --service-node-port-range=30000-42767  \\
      --etcd-servers=https://192.168.10.11:2379,https://192.168.10.12:2379,https://192.168.10.13:2379 \\
      --etcd-cafile=/etc/etcd/ssl/ca.pem  \\
      --etcd-certfile=/etc/etcd/ssl/etcd-client.pem  \\
      --etcd-keyfile=/etc/etcd/ssl/etcd-client-key.pem  \\
      --client-ca-file=/etc/kubernetes/pki/ca.pem  \\
      --tls-cert-file=/etc/kubernetes/pki/kube-apiserver.pem  \\
      --tls-private-key-file=/etc/kubernetes/pki/kube-apiserver-key.pem  \\
      --kubelet-client-certificate=/etc/kubernetes/pki/kube-apiserver.pem  \\
      --kubelet-client-key=/etc/kubernetes/pki/kube-apiserver-key.pem  \\
      --service-account-key-file=/etc/kubernetes/pki/sa.pub  \\
      --service-account-signing-key-file=/etc/kubernetes/pki/sa.key  \\
      --service-account-issuer=https://kubernetes.default.svc.cluster.local \\
      --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname  \\
      --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota  \\
      --authorization-mode=Node,RBAC  \\
      --enable-bootstrap-token-auth=true  \\
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem  \\
      --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem  \\
      --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem  \\
      --requestheader-allowed-names=aggregator  \\
      --requestheader-group-headers=X-Remote-Group  \\
      --requestheader-extra-headers-prefix=X-Remote-Extra-  \\
      --requestheader-username-headers=X-Remote-User  

Restart=on-failure
RestartSec=10s
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target
EOF

启动服务

systemctl enable --now kube-apiserver.service

7.2 安装kube-controller-manager

#生成service文件
cat > /etc/systemd/system/kube-controller-manager.service <<EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/bin/kube-controller-manager \
      --v=2 \
      --logtostderr=true \
      --root-ca-file=/etc/kubernetes/pki/ca.pem \
      --cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \
      --cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \
      --service-account-private-key-file=/etc/kubernetes/pki/sa.key \
      --kubeconfig=/etc/kubernetes/kube-controller-manager.kubeconfig \
      --leader-elect=true \
      --use-service-account-credentials=true \
      --node-monitor-grace-period=40s \
      --node-monitor-period=5s \
      --pod-eviction-timeout=2m0s \
      --controllers=*,bootstrapsigner,tokencleaner \
      --allocate-node-cidrs=true \
      --cluster-cidr=10.200.0.0/16 \
      --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \
      --node-cidr-mask-size=24
Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target
EOF

#启动

#启动服务
systemctl enable --now kube-controller-manager.service

7.3 安装kube-scheduler

#生成service文件
cat > /etc/systemd/system/kube-scheduler.service <<EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/bin/kube-scheduler \
      --v=2 \
      --logtostderr=true \
      --leader-elect=true \
      --kubeconfig=/etc/kubernetes/kube-scheduler.kubeconfig

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target
EOF
#启动服务
systemctl enable --now kube-scheduler.service

7.4 在master节点部署kubectl工具

mkdir /root/.kube/ -p
cp /opt/pki/kubernetes/admin/admin.kubeconfig  /root/.kube/config

验证

kubectl get cs 
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-0               Healthy   {"health":"true"}

7.5 部署kubelet

7.5.1 使用TLS Bootstrapping自动认证kubelet

创建TLS Bootstrapping认证文件

mkdir /opt/pki/kubernetes/kubelet -p
cd /opt/pki/kubernetes/kubelet
#生成随机认证key
a=`head -c 16 /dev/urandom | od -An -t x | tr -d ' ' | head -c6`
b=`head -c 16 /dev/urandom | od -An -t x | tr -d ' ' | head -c16`

生成权限绑定文件

cat > bootstrap.secret.yaml <<EOF
apiVersion: v1
kind: Secret
metadata:
  name: bootstrap-token-$a
  namespace: kube-system
type: bootstrap.kubernetes.io/token
stringData:
  description: "The default bootstrap token generated by 'kubelet '."
  token-id: $a
  token-secret: $b
  usage-bootstrap-authentication: "true"
  usage-bootstrap-signing: "true"
  auth-extra-groups:  system:bootstrappers:default-node-token,system:bootstrappers:worker,system:bootstrappers:ingress
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: kubelet-bootstrap
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:node-bootstrapper
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: Group
  name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: node-autoapprove-bootstrap
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: Group
  name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: node-autoapprove-certificate-rotation
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:certificates.k8s.io:certificatesigningrequests:selfnodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: Group
  name: system:nodes
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
  labels:
    kubernetes.io/bootstrapping: rbac-defaults
  name: system:kube-apiserver-to-kubelet
rules:
  - apiGroups:
      - ""
    resources:
      - nodes/proxy
      - nodes/stats
      - nodes/log
      - nodes/spec
      - nodes/metrics
    verbs:
      - "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: system:kube-apiserver
  namespace: ""
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:kube-apiserver-to-kubelet
subjects:
  - apiGroup: rbac.authorization.k8s.io
    kind: User
    name: kube-apiserver
EOF

生成配置文件

#生成配置文件
kubectl config set-cluster kubernetes  \
--certificate-authority=../ca/ca.pem   \
--embed-certs=true   \
--server=https://10.66.6.2:6443   \
--kubeconfig=bootstrap-kubelet.kubeconfig

kubectl config set-credentials tls-bootstrap-token-user  \
--token=$a.$b \
--kubeconfig=bootstrap-kubelet.kubeconfig

kubectl config set-context tls-bootstrap-token-user@kubernetes \
--cluster=kubernetes   \
--user=tls-bootstrap-token-user  \
--kubeconfig=bootstrap-kubelet.kubeconfig

kubectl config use-context tls-bootstrap-token-user@kubernetes  \
--kubeconfig=bootstrap-kubelet.kubeconfig
#创建权限
kubectl apply -f bootstrap.secret.yaml

分发认证文件

for i in $node;do
  ssh $i "mkdir /etc/kubernetes -p"
  scp  /opt/pki/kubernetes/kubelet/bootstrap-kubelet.kubeconfig $i:/etc/kubernetes
done

7.5.2 部署kubernetes 组件

使用docker容器运行方式

mkdir /etc/systemd/system/kubelet.service.d/ -p
mkdir /etc/kubernetes/manifests/ -p

生成service文件

cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=docker.service
Requires=docker.service

[Service]
ExecStart=/usr/bin/kubelet

Restart=always
StartLimitInterval=0
RestartSec=10

[Install]
WantedBy=multi-user.target
EOF

生成service 配置文件

cat > /usr/lib/systemd/system/kubelet.service.d/10-kubelet.conf << 
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"
Environment="KUBELET_SYSTEM_ARGS=--hostname-override=10.66.6.2"
Environment="KUBELET_RINTIME=--container-runtime=remote --container-runtime-endpoint=unix:///var/run/cri-dockerd.sock"
Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml"
Environment="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node=''"
ExecStart=
ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_SYSTEM_ARGS $KUBELET_EXTRA_ARGS $KUBELET_RINTIME
EOF

使用container的方式部署

a=`ifconfig eth0 | awk -rn 'NR==2{print $2}'`
mkdir /etc/systemd/system/kubelet.service.d/ -p
mkdir /etc/kubernetes/manifests/ -p
#生成service文件
cat > /etc/systemd/system/kubelet.service <<EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service

[Service]
ExecStart=/usr/bin/kubelet

Restart=always
StartLimitInterval=0
RestartSec=10

[Install]
WantedBy=multi-user.target
EOF
#生成service配置文件
cat > /etc/systemd/system/kubelet.service.d/10-kubelet.conf <<EOF
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"
Environment="KUBELET_SYSTEM_ARGS=--hostname-override=$a"
Environment="KUBELET_RINTIME=--container-runtime=remote --container-runtime-endpoint=unix:///run/containerd/containerd.sock"
Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml"
Environment="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node='' "
ExecStart=
ExecStart=/usr/bin/kubelet \$KUBELET_KUBECONFIG_ARGS \$KUBELET_CONFIG_ARGS \$KUBELET_SYSTEM_ARGS \$KUBELET_EXTRA_ARGS \$KUBELET_RINTIME
EOF

kubelet配置文件生成

a=`ifconfig eth0 | awk -rn 'NR==2{print $2}'`
#生成配置文件
cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: $a
port: 10250
readOnlyPort: 10255
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 2m0s
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 5m0s
    cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.200.0.2
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
  imagefs.available: 15%
  memory.available: 100Mi
  nodefs.available: 10%
  nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
EOF

启动服务

systemctl enable --now kubelet.service

7.6 部署kube-proxy

mkdir /opt/pki/kubernetes/kube-proxy/ -p
cd  /opt/pki/kubernetes/kube-proxy/

生成配置文件

kubectl -n kube-system create serviceaccount kube-proxy
kubectl create clusterrolebinding  system:kube-proxy  --clusterrole system:node-proxier --serviceaccount kube-system:kube-proxy

cat >kube-proxy-scret.yml<<EOF
apiVersion: v1
kind: Secret
metadata:
  name: kube-proxy
  namespace: kube-system
  annotations:
    kubernetes.io/service-account.name: "kube-proxy"
type: kubernetes.io/service-account-token
EOF
kubectl apply -f kube-proxy-scret.yml
JWT_TOKEN=$(kubectl -n kube-system get secret/kube-proxy \
--output=jsonpath='{.data.token}' | base64 -d)
kubectl config set-cluster kubernetes   \
--certificate-authority=/etc/kubernetes/pki/ca.pem    \
--embed-certs=true    \
--server=https://10.66.6.2:6443    \
--kubeconfig=kube-proxy.kubeconfig

kubectl config set-credentials kubernetes    \
--token=${JWT_TOKEN}   \
--kubeconfig=kube-proxy.kubeconfig

kubectl config set-context kubernetes    \
--cluster=kubernetes   \
--user=kubernetes   \
--kubeconfig=kube-proxy.kubeconfig

kubectl config use-context kubernetes   \
--kubeconfig=kube-proxy.kubeconfig

拷贝文件到节点

for i in $node;do
  scp  /opt/pki/kubernetes/kube-proxy/kube-proxy.kubeconfig $i:/etc/kubernetes
done

生成service文件

cat > /etc/systemd/system/kube-proxy.service <<EOF
[Unit]
Description=Kubernetes Kube Proxy
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
ExecStart=/usr/bin/kube-proxy \
  --config=/etc/kubernetes/kube-proxy.conf \
  --v=2

Restart=always
RestartSec=10s

[Install]
WantedBy=multi-user.target
EOF

生成配置文件

cat > /etc/kubernetes/kube-proxy.yaml << EOF
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 10.66.6.2
clientConnection:
  acceptContentTypes: ""
  burst: 10
  contentType: application/vnd.kubernetes.protobuf
  kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
  qps: 5
clusterCIDR: 10.100.0.0/16
configSyncPeriod: 15m0s
conntrack:
  max: null
  maxPerCore: 32768
  min: 131072
  tcpCloseWaitTimeout: 1h0m0s
  tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: "10.66.6.2"
iptables:
  masqueradeAll: false
  masqueradeBit: 14
  minSyncPeriod: 0s
  syncPeriod: 30s
ipvs:
  masqueradeAll: true
  minSyncPeriod: 5s
  scheduler: "rr"
  syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms
EOF

启动服务

systemctl enable --now kube-proxy.service

验证工作模式

curl 127.0.0.1:10249/proxyMode

8. 安装组件

8.1 安装calico网络插件

yaml文件下载

https://raw.githubusercontent.com/projectcalico/calico/v3.24.5/manifests/calico-typha.yaml

修改如下:

- name: CALICO_IPV4POOL_CIDR
  value: "10.100.0.0/16" 
kubectl apply -f calico-typha.yaml
#验证
kubectl get node

8.2 安装calicoctl客户端

mkdir /etc/calico -p
cat >/etc/calico/calicoctl.cfg <<EOF
apiVersion: projectcalico.org/v3
kind: CalicoAPIConfig
metadata:
spec:
  datastoreType: "kubernetes"
  kubeconfig: "/root/.kube/config"
EOF
#验证
calicoctl node status

8.3 安装dashboard

地址:

https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml

修改yaml文件

kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
spec:
  type: NodePort  #添加
  ports:
    - port: 443 
      targetPort: 8443
      nodePort: 30001  #添加
  selector:
    k8s-app: kubernetes-dashboard
#创建
kubectl apply -f dashboard.yaml

创建用户

cat >admin.yaml<<EOF
apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kubernetes-dashboard
---
apiVersion: v1
kind: Secret
metadata:
  name: admin-user
  namespace: kubernetes-dashboard
  annotations:
    kubernetes.io/service-account.name: "admin-user"
type: kubernetes.io/service-account-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: admin-user
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin-user
  namespace: kubernetes-dashboard
EOF

创建用户

kubectl apply -f admin.yaml
#获取用户token
kubectl describe secrets -n kubernetes-dashboard admin-user

8.4 安装mertrics-server

下载地址:

https://github.com/kubernetes-sigs/metrics-server/

拷贝证书文件

for i in $node;do
   scp /opt/pki/proxy-client/front-proxy-ca.pem $i:/etc/kubernetes/pki/
done

修改配置

        - --cert-dir=/tmp
        - --secure-port=4443
        - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
        - --kubelet-use-node-status-port
        - --metric-resolution=15s
        - --kubelet-insecure-tls
        - --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem 
        - --requestheader-username-headers=X-Remote-User
        - --requestheader-group-headers=X-Remote-Group
        - --requestheader-extra-headers-prefix=X-Remote-Extra- 
        volumeMounts:
        - mountPath: /tmp
          name: tmp-dir
        - mountPath: /etc/kubernetes/pki
          name: ca-ssl
      volumes:
      - emptyDir: {}
        name: tmp-dir
      - name: ca-ssl
        hostPath:
          path: /etc/kubernetes/pki

kubectl apply -f components.yaml
#验证
kubectl top node

总结

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。

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