@目录
基本环境配置
节点规划
| 主机名 | IP地址 | 说明 |
|---|---|---|
| k8s-master01 ~ 03 | 10.0.0.201 ~ 203 | master节点 * 3 |
| k8s-master-lb | 10.0.0.236 | keepalived虚拟IP |
| k8s-node01 ~ 02 | 10.0.0.204 ~ 205 | worker节点 * 2 |
网段规划及软件版本
| 配置信息 | 备注 |
|---|---|
| 系统版本 | CentOS 7.9 |
| Docker版本 | 20.10.x |
| Pod网段 | 172.16.0.0/12 |
| Service网段 | 192.168.0.0/16 |
基本配置
所有节点配置hosts，修改/etc/hosts如下：
10.0.0.201 k8s-master01
10.0.0.202 k8s-master02
10.0.0.203 k8s-master03
10.0.0.236 k8s-master-lb # 如果不是高可用集群，该IP为Master01的IP
10.0.0.204 k8s-node01
10.0.0.205 k8s-node02
yum源配置：
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo
必备工具安装：
yum install wget jq psmisc vim net-tools telnet yum-utils device-mapper-persistent-data lvm2 git -y
拥抱云原生，高薪就业点我了解
所有节点关闭防火墙、selinux、dnsmasq、swap：
systemctl disable --now firewalld
systemctl disable --now dnsmasq
systemctl disable --now NetworkManager
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/sysconfig/selinux
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
swapoff -a && sysctl -w vm.swappiness=0
sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab
时间同步：
rpm -ivh http://mirrors.wlnmp.com/centos/wlnmp-release-centos.noarch.rpm
yum install ntpdate -y
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
echo 'Asia/Shanghai' >/etc/timezone
ntpdate time2.aliyun.com
# 加入到crontab
*/5 * * * * /usr/sbin/ntpdate time2.aliyun.com
所有节点配置limit：
ulimit -SHn 65535
vim /etc/security/limits.conf
# 末尾添加如下内容
* soft nofile 65536
* hard nofile 131072
* soft nproc 65535
* hard nproc 655350
* soft memlock unlimited
* hard memlock unlimited
免密钥配置：
ssh-keygen -t rsa
for i in k8s-master01 k8s-master02 k8s-master03 k8s-node01 k8s-node02;do ssh-copy-id -i .ssh/id_rsa.pub $i;done
下载安装所有的源码文件：
cd /root/ ; git clone https://gitee.com/dukuan/k8s-ha-install.git
所有节点升级系统并重启：
yum update -y --exclude=kernel* && reboot
内核升级配置
下载内核：
cd /root
wget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpm
wget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm
从master01节点传到其他节点：
for i in k8s-master02 k8s-master03 k8s-node01 k8s-node02;do scp kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpm $i:/root/ ; done
所有节点安装内核：
cd /root && yum localinstall -y kernel-ml*
# 所有节点更改内核启动顺序
grub2-set-default 0 && grub2-mkconfig -o /etc/grub2.cfg
grubby --args="user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)"
# 检查默认内核是不是4.19
[root@k8s-master02 ~]# grubby --default-kernel
/boot/vmlinuz-4.19.12-1.el7.elrepo.x86_64
# 所有节点重启，然后检查内核是不是4.19
[root@k8s-master02 ~]# uname -a
Linux k8s-master02 4.19.12-1.el7.elrepo.x86_64 #1 SMP Fri Dec 21 11:06:36 EST 2018 x86_64 x86_64 x86_64 GNU/Linux
所有节点安装ipvsadm：
yum install ipvsadm ipset sysstat conntrack libseccomp -y
所有节点配置ipvs模块：
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack
vim /etc/modules-load.d/ipvs.conf
# 加入以下内容
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
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
# 设置开机自动加载
systemctl enable --now systemd-modules-load.service
所有节点配置k8s内核：
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
fs.may_detach_mounts = 1
net.ipv4.conf.all.route_localnet = 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.netfilter.nf_conntrack_max=2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_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.tcp_timestamps = 0
net.core.somaxconn = 16384
EOF
sysctl --system
重启服务器后，测试配置是否还在加载：
reboot
lsmod | grep --color=auto -e ip_vs -e nf_conntrack
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K8s组件及Runtime安装
Containerd安装
所有节点安装docker-ce-20.10：
yum install docker-ce-20.10.* docker-ce-cli-20.10.* -y
配置Containerd所需的模块（所有节点）：
# cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF
所有节点加载模块：
# modprobe -- overlay
# modprobe -- br_netfilter
所有节点，配置Containerd所需的内核：
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
所有节点加载内核：
# sysctl --system
所有节点配置Containerd的配置文件：
# mkdir -p /etc/containerd
# containerd config default | tee /etc/containerd/config.toml
所有节点将Containerd的Cgroup改为Systemd：
# vim /etc/containerd/config.toml
找到containerd.runtimes.runc.options，添加SystemdCgroup = true
所有节点将sandbox_image的Pause镜像改成符合自己版本的地址registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.6：
所有节点启动Containerd，并配置开机自启动：
# systemctl daemon-reload
# systemctl enable --now containerd
所有节点配置crictl客户端连接的运行时位置：
# cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
K8s组件安装
所有节点安装1.23最新版本kubeadm、kubelet和kubectl：
# yum install kubeadm-1.23* kubelet-1.23* kubectl-1.23* -y
更改Kubelet的配置使用Containerd作为Runtime：
# cat >/etc/sysconfig/kubelet<<EOF
KUBELET_KUBEADM_ARGS="--container-runtime=remote --runtime-request-timeout=15m --container-runtime-endpoint=unix:///run/containerd/containerd.sock"
EOF
设置Kubelet开机自启动：
# systemctl daemon-reload
# systemctl enable --now kubelet
高可用实现
所有Master节点通过yum安装HAProxy和KeepAlived：
yum install keepalived haproxy -y
所有Master节点配置HAProxy：
[root@k8s-master01 etc]# mkdir /etc/haproxy
[root@k8s-master01 etc]# vim /etc/haproxy/haproxy.cfg
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
frontend k8s-master
bind 0.0.0.0:16443
bind 127.0.0.1:16443
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 k8s-master01 10.0.0.201:6443 check
server k8s-master02 10.0.0.202:6443 check
server k8s-master03 10.0.0.203:6443 check
所有Master节点配置KeepAlived，
Master01节点的配置：
[root@k8s-master01 etc]# mkdir /etc/keepalived
[root@k8s-master01 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state MASTER
interface ens33
mcast_src_ip 10.0.0.201
virtual_router_id 51
priority 101
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
10.0.0.236
}
track_script {
chk_apiserver
}
}
Master02节点的配置：
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
mcast_src_ip 10.0.0.202
virtual_router_id 51
priority 100
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
10.0.0.236
}
track_script {
chk_apiserver
}
}
Master03节点的配置：
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
}
vrrp_script chk_apiserver {
script "/etc/keepalived/check_apiserver.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
mcast_src_ip 10.0.0.203
virtual_router_id 51
priority 100
advert_int 2
authentication {
auth_type PASS
auth_pass K8SHA_KA_AUTH
}
virtual_ipaddress {
10.0.0.236
}
track_script {
chk_apiserver
}
}
所有master节点配置KeepAlived健康检查文件：
[root@k8s-master01 keepalived]# cat /etc/keepalived/check_apiserver.sh
#!/bin/bash
err=0
for k in $(seq 1 3)
do
check_code=$(pgrep haproxy)
if [[ $check_code == "" ]]; then
err=$(expr $err + 1)
sleep 1
continue
else
err=0
break
fi
done
if [[ $err != "0" ]]; then
echo "systemctl stop keepalived"
/usr/bin/systemctl stop keepalived
exit 1
else
exit 0
fi
启动haproxy和keepalived：
[root@k8s-master01 keepalived]# systemctl daemon-reload
[root@k8s-master01 keepalived]# systemctl enable --now haproxy
[root@k8s-master01 keepalived]# systemctl enable --now keepalived
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集群初始化
Master01初始化
vim kubeadm-config.yaml
apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: 7t2weq.bjbawausm0jaxury
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: 10.0.0.201
bindPort: 6443
nodeRegistration:
criSocket: /run/containerd/containerd.sock
name: k8s-master01
taints:
- effect: NoSchedule
key: node-role.kubernetes.io/master
---
apiServer:
certSANs:
- 10.0.0.236
timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controlPlaneEndpoint: 10.0.0.236:16443
controllerManager: {}
dns:
type: CoreDNS
etcd:
local:
dataDir: /var/lib/etcd
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: v1.23.1 # 更改此处的版本号和kubeadm version一致
networking:
dnsDomain: cluster.local
podSubnet: 172.16.0.0/12
serviceSubnet: 192.168.0.0/16
scheduler: {}
更新kubeadm文件：
kubeadm config migrate --old-config kubeadm-config.yaml --new-config new.yaml
将new.yaml文件复制到其他master节点：
for i in k8s-master02 k8s-master03; do scp new.yaml $i:/root/; done
所有Master节点提前下载镜像：
kubeadm config images pull --config /root/new.yaml
Master01节点初始化：
kubeadm init --config /root/new.yaml --upload-certs
初始化成功后信息如下：
kubeadm join 10.0.0.236:16443 --token 7t2weq.bjbawausm0jaxury \
--discovery-token-ca-cert-hash sha256:df72788de04bbc2e8fca70becb8a9e8503a962b5d7cd9b1842a0c39930d08c94 \
--control-plane --certificate-key c595f7f4a7a3beb0d5bdb75d9e4eff0a60b977447e76c1d6885e82c3aa43c94c
Please note that the certificate-key gives access to cluster sensitive data, keep it secret!
As a safeguard, uploaded-certs will be deleted in two hours; If necessary, you can use
"kubeadm init phase upload-certs --upload-certs" to reload certs afterward.
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 10.0.0.236:16443 --token 7t2weq.bjbawausm0jaxury \
--discovery-token-ca-cert-hash sha256:df72788de04bbc2e8fca70becb8a9e8503a962b5d7cd9b1842a0c39930d08c94
Master01节点配置环境变量，用于访问Kubernetes集群：
cat <<EOF >> /root/.bashrc
export KUBECONFIG=/etc/kubernetes/admin.conf
EOF
source /root/.bashrc
添加Master节点
使用上述初始化命令生产的join命令添加即可：
kubeadm join 10.0.0.236:16443 --token 7t2weq.bjbawausm0jaxury \
--discovery-token-ca-cert-hash sha256:df72788de04bbc2e8fca70becb8a9e8503a962b5d7cd9b1842a0c39930d08c94 \
--control-plane --certificate-key c595f7f4a7a3beb0d5bdb75d9e4eff0a60b977447e76c1d6885e82c3aa43c94c
添加Worker节点
kubeadm join 10.0.0.236:16443 --token 7t2weq.bjbawausm0jaxury \
--discovery-token-ca-cert-hash sha256:df72788de04bbc2e8fca70becb8a9e8503a962b5d7cd9b1842a0c39930d08c94
添加完成后结果如下：
CNI插件Calico安装
只在master01执行：
cd /root/k8s-ha-install && git checkout manual-installation-v1.23.x && cd calico/
修改Pod网段：
POD_SUBNET=`cat /etc/kubernetes/manifests/kube-controller-manager.yaml | grep cluster-cidr= | awk -F= '{print $NF}'`
sed -i "s#POD_CIDR#${POD_SUBNET}#g" calico.yaml
kubectl apply -f calico.yaml
创建完成后，等待几分钟后查看状态：
Metrics Server部署
将Master01节点的front-proxy-ca.crt复制到所有Node节点：
scp /etc/kubernetes/pki/front-proxy-ca.crt k8s-node01:/etc/kubernetes/pki/front-proxy-ca.crt
scp /etc/kubernetes/pki/front-proxy-ca.crt k8s-node(其他节点自行拷贝):/etc/kubernetes/pki/front-proxy-ca.crt
安装metrics server：
cd /root/k8s-ha-install/kubeadm-metrics-server
# kubectl create -f comp.yaml
serviceaccount/metrics-server created
clusterrole.rbac.authorization.k8s.io/system:aggregated-metrics-reader created
clusterrole.rbac.authorization.k8s.io/system:metrics-server created
rolebinding.rbac.authorization.k8s.io/metrics-server-auth-reader created
clusterrolebinding.rbac.authorization.k8s.io/metrics-server:system:auth-delegator created
clusterrolebinding.rbac.authorization.k8s.io/system:metrics-server created
service/metrics-server created
deployment.apps/metrics-server created
apiservice.apiregistration.k8s.io/v1beta1.metrics.k8s.io created
查看Metrics Server状态：
状态正常后，查看度量指标：
# kubectl top node
NAME CPU(cores) CPU% MEMORY(bytes) MEMORY%
k8s-master01 153m 3% 1701Mi 44%
k8s-master02 125m 3% 1693Mi 44%
k8s-master03 129m 3% 1590Mi 41%
k8s-node01 73m 1% 989Mi 25%
k8s-node02 64m 1% 950Mi 24%
# kubectl top po -A
NAMESPACE NAME CPU(cores) MEMORY(bytes)
kube-system calico-kube-controllers-66686fdb54-74xkg 2m 17Mi
kube-system calico-node-6gqpb 21m 85Mi
kube-system calico-node-bmvjt 29m 76Mi
kube-system calico-node-hdp9c 15m 82Mi
kube-system calico-node-wwrfv 23m 86Mi
kube-system calico-node-zzv88 22m 84Mi
kube-system calico-typha-67c6dc57d6-hj6l4 2m 23Mi
kube-system calico-typha-67c6dc57d6-jm855 2m 22Mi
kube-system coredns-7d89d9b6b8-sr6mf 1m 16Mi
kube-system coredns-7d89d9b6b8-xqwjk 1m 16Mi
kube-system etcd-k8s-master01 24m 96Mi
kube-system etcd-k8s-master02 20m 91Mi
kube-system etcd-k8s-master03 21m 92Mi
kube-system kube-apiserver-k8s-master01 41m 502Mi
kube-system kube-apiserver-k8s-master02 35m 476Mi
kube-system kube-apiserver-k8s-master03 71m 480Mi
kube-system kube-controller-manager-k8s-master01 15m 65Mi
kube-system kube-controller-manager-k8s-master02 1m 26Mi
kube-system kube-controller-manager-k8s-master03 2m 27Mi
kube-system kube-proxy-8lt45 1m 18Mi
kube-system kube-proxy-d6jfh 1m 18Mi
kube-system kube-proxy-hfnvz 1m 19Mi
kube-system kube-proxy-nsms8 1m 18Mi
kube-system kube-proxy-xmlhq 3m 21Mi
kube-system kube-scheduler-k8s-master01 2m 26Mi
kube-system kube-scheduler-k8s-master02 2m 24Mi
kube-system kube-scheduler-k8s-master03 2m 24Mi
kube-system metrics-server-d54b585c4-4dqpf 46m 16Mi
高薪K8s全栈架构师视频点我了解，提供完善并且免费的售后服务、免费更新、免费技术问答、直击年薪30万！ 来都来了点我看看吧~
Dashboard部署
安装
cd /root/k8s-ha-install/dashboard/
[root@k8s-master01 dashboard]# kubectl create -f .
serviceaccount/admin-user created
clusterrolebinding.rbac.authorization.k8s.io/admin-user created
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created
登录Dashboard
查看dashboard端口号：
# kubectl get svc kubernetes-dashboard -n kubernetes-dashboard
查看管理员Token：
[root@k8s-master01 1.1.1]# kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')
Name: admin-user-token-r4vcp
Namespace: kube-system
Labels: <none>
Annotations: kubernetes.io/service-account.name: admin-user
kubernetes.io/service-account.uid: 2112796c-1c9e-11e9-91ab-000c298bf023
Type: kubernetes.io/service-account-token
Data
====
ca.crt: 1025 bytes
namespace: 11 bytes
token: eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyLXRva2VuLXI0dmNwIiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiIyMTEyNzk2Yy0xYzllLTExZTktOTFhYi0wMDBjMjk4YmYwMjMiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06YWRtaW4tdXNlciJ9.bWYmwgRb-90ydQmyjkbjJjFt8CdO8u6zxVZh-19rdlL_T-n35nKyQIN7hCtNAt46u6gfJ5XXefC9HsGNBHtvo_Ve6oF7EXhU772aLAbXWkU1xOwQTQynixaypbRIas_kiO2MHHxXfeeL_yYZRrgtatsDBxcBRg-nUQv4TahzaGSyK42E_4YGpLa3X3Jc4t1z0SQXge7lrwlj8ysmqgO4ndlFjwPfvg0eoYqu9Qsc5Q7tazzFf9mVKMmcS1ppPutdyqNYWL62P1prw_wclP0TezW1CsypjWSVT4AuJU8YmH8nTNR1EXn8mJURLSjINv6YbZpnhBIPgUGk1JYVLcn47w
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