云野阁

# 将10.10.3.121的主机名改为future-k8s-node0
hostnamectl set-hostname future-k8s-node0 && bash
# 将10.10.3.122的主机名改为future-k8s-node1
hostnamectl set-hostname future-k8s-node1 && bash
# 将10.10.3.123的主机名改为future-k8s-node2
hostnamectl set-hostname future-k8s-node2 && bash
# 将10.10.3.124的主机名改为future-k8s-node3
hostnamectl set-hostname future-k8s-node3 && bash

# 关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
firewall-cmd --state
 
# selinux永久关闭
setenforce 0
 sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
cat /etc/selinux/config

# swap永久关闭
swapoff --all
swapoff -a
sed -ri 's/.*swap.*/#&/' /etc/fstab
cat /etc/fstab

# 添加hosts
cat >> /etc/hosts << EOF
10.10.3.121 future-k8s-node0
10.10.3.122 future-k8s-node1
10.10.3.123 future-k8s-node2
10.10.3.124 future-k8s-node3
10.10.3.125 future-k8s-vip
EOF
#查看
cat /etc/hosts


# 添加网桥过滤及内核转发配置文件
cat > /etc/sysctl.d/k8s.conf << EOF
 net.bridge.bridge-nf-call-ip6tables = 1
 net.bridge.bridge-nf-call-iptables = 1
 net.ipv4.ip_forward = 1
EOF
# 查看
cat /etc/sysctl.d/k8s.conf
# 加载br_netfilter模块
modprobe br_netfilter
# 查看是否加载
lsmod | grep br_netfilter
# 加载网桥过滤及内核转发配置文件
sysctl -p /etc/sysctl.d/k8s.conf

#同步时间
yum install ntp -y
systemctl start ntpd
systemctl enable ntpd
yum install chrony  -y
systemctl start chrony
systemctl enable chronyd
#修改配置，添加内容
echo "
server 10.10.3.70 iburst
allow 10.10.3.0/24
" >> /etc/chrony.conf
timedatectl set-ntp true
systemctl restart chronyd
timedatectl status
date

 # 安装ipset及ipvsadm
 yum -y install ipset ipvsadm
 配置ipvsadm模块加载方式
 # 添加需要加载的模块
echo ' #!/bin/bash
 modprobe -- ip_vs
 modprobe -- ip_vs_rr
 modprobe -- ip_vs_wrr
 modprobe -- ip_vs_sh
 modprobe -- nf_conntrack
' > /etc/sysconfig/modules/ipvs.modules
#查看
cat /etc/sysconfig/modules/ipvs.modules
 # 授权、运行、检查是否加载
chmod 755 /etc/sysconfig/modules/ipvs.modules 
bash /etc/sysconfig/modules/ipvs.modules 
lsmod | grep -e ip_vs -e nf_conntrack

#重启
reboot

echo '
[docker-ce-stable]
name=Docker CE Stable - $basearch
baseurl=https://download.docker.com/linux/centos/7/$basearch/stable
enabled=1
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg ' > /etc/yum.repos.d/docker-ce.repo

 yum -y install docker-ce docker-ce-cli  containerd.io
#启动docker并设置开机自启
systemctl start docker  
systemctl enable docker
#查看版本
docker -v
docker compose version

#将配置写入daemon.json文件
echo '{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "data-root": "/data/docker"
} ' > /etc/docker/daemon.json
#查看
cat /etc/docker/daemon.json
systemctl daemon-reload
systemctl restart docker
docker info

mkdir  cri-dockerd   calico dashboard  docker  metrics-server  script  ingress-nginx

cd /data/cri-dockerd
# 下载cri-dockerd安装包
wget https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.4/cri-dockerd-0.3.4-3.el8.x86_64.rpm
# 安装cri-dockerd
rpm -ivh cri-dockerd-0.3.4-3.el8.x86_64.rpm
docker pull registry.aliyuncs.com/google_containers/pause:3.9
# 修改镜像地址为国内，否则kubelet拉取不了镜像导致启动失败
sed -i.bak 's|ExecStart=.*$|ExecStart=/usr/bin/cri-dockerd --container-runtime-endpoint fd:// --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.9|g' /usr/lib/systemd/system/cri-docker.service
cat /usr/lib/systemd/system/cri-docker.service
# 启动cri-dockerd
systemctl daemon-reload 
systemctl start cri-docker.service
systemctl enable cri-docker.service

yum install keepalived haproxy -y

cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
cp /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.bak

echo "
#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000
#---------------------------------------------------------------------
# kubernetes apiserver frontend which proxys to the backends
#---------------------------------------------------------------------
frontend kubernetes-apiserver
    mode                 tcp
    bind                 *:16443 #高可用监控端口，初始化k8s集群时会用
    option               tcplog
    default_backend      kubernetes-apiserver
#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend kubernetes-apiserver
    mode        tcp
    balance     roundrobin
    server      future-k8s-node0   10.10.3.121:6443 check
    server      future-k8s-node1   10.10.3.122:6443 check
    server      future-k8s-node2   10.10.3.123:6443 check

#---------------------------------------------------------------------
# collection haproxy statistics message
#---------------------------------------------------------------------
listen stats
    bind                 *:1080
    stats auth           admin:awesomePassword
    stats refresh        5s
    stats realm          HAProxy\ Statistics
    stats uri            /admin?stats

" > /etc/haproxy/haproxy.cfg

#启动keepalived  
systemctl enable keepalived  && systemctl start keepalived  
#启动haproxy 
systemctl enable haproxy && systemctl start haproxy
systemctl status keepalived
systemctl status haproxy

cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

# 安装kubelet、kubeadm、kubectl
yum install -y kubelet-1.27.0 kubeadm-1.27.0 kubectl-1.27.0 --disableexcludes=kubernetes

#将cgroup改为systemd
echo 'KUBELET_EXTRA_ARGS="--cgroup-driver=systemd"' > /etc/sysconfig/kubelet
# 查看
cat /etc/sysconfig/kubelet
# 设置开机启动
systemctl start kubelet.service
systemctl enable kubelet.service
systemctl status kubelet.service

#查看版本
 kubeadm version
 kubelet --version
 kubectl version 

 kubeadm join future-k8s-vip:16443 --token ysl0xr.knx79yu06cldwiy1         --discovery-token-ca-cert-hash sha256:5dd8de94e08a560c7c2424dde0719a9f4e6ac4e5e5fe538ebbab0cbc5866b000         --control-plane  --cri-socket=unix:///var/run/cri-dockerd.sock
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

 kubeadm join 10.10.3.121:6443 --token pzyo37.oaaqt1nrw3u7ijuj   --discovery-token-ca-cert-hash sha256:b8067f74af04b63399af1de28644223178e5d63e8258c25d465e78aca515e887 --cri-socket=unix:///var/run/cri-dockerd.sock

#查看默认配置的污点
kubectl describe node future-k8s-node2 |grep Taints

#去除污点
kubectl taint nodes future-k8s-node2 node-role.kubernetes.io/control-plane-

#添加worker标记
kubectl label nodes future-k8s-node2 node-role.kubernetes.io/worker=
#删除worker标记
kubectl label nodes future-k8s-node2 node-role.kubernetes.io/worker-

mkdir /data/calico
cd  /data/calico
wget https://docs.tigera.io/archive/v3.25/manifests/calico.yaml
#修改calico.yaml找到CALICO_IPV4POOL_CIDR
vi calico.yaml
##############修改内容###################
 value: "10.244.0.0/16"
 ##############修改内容###################
 #在master节点上安装calico
 kubectl apply -f calico.yaml

# 查看所有的节点
kubectl get nodes
kubectl get nodes -o wide
#查看集群健康情况
 kubectl get cs

# 创建Nginx程序
kubectl create deployment nginx --image=nginx
# 开放80端口
kubectl expose deployment nginx --port=80 --type=NodePort
# 查看pod状态
kubectl get pod
#查看service状态
kubectl get service
##########################################################################
NAME         TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.96.0.1       <none>        443/TCP        5d1h
nginx        NodePort    10.98.221.224   <none>        80:32743/TCP   23s
##########################################################################
# 访问网页测试(端口号以查看service状态得到的为准)
http://10.10.3.121:32743/

#创建存放目录
mkdir dashboard
cd dashboard/
#2.7
wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml

vi recommended.yaml
#将副本设置为2
#################修改内容#######################
kind: Service
apiVersion: v1
metadata:
  labels:
    k8s-app: kubernetes-dashboard
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
spec:
  ports:
    - port: 443
      targetPort: 8443
      nodePort: 32009   #添加这一行，注意缩进对齐
  selector:
    k8s-app: kubernetes-dashboard
  type: NodePort          #添加这一行，注意缩进对齐
  #################修改内容#######################

#安装
kubectl apply -f recommended.yaml
#查看pod和svc
kubectl get pod,svc -o wide -n kubernetes-dashboard
#########################################################
NAME                                             READY   STATUS              RESTARTS   AGE   IP       NODE    NOMINATED NODE   READINESS GATES
pod/dashboard-metrics-scraper-5cb4f4bb9c-mg569   0/1     ContainerCreating   0          9s    <none>   node1   <none>           <none>
pod/kubernetes-dashboard-6967859bff-2968p        0/1     ContainerCreating   0          9s    <none>   node1   <none>           <none>

NAME                                TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)         AGE   SELECTOR
service/dashboard-metrics-scraper   ClusterIP   10.100.129.191   <none>        8000/TCP        9s    k8s-app=dashboard-metrics-scraper
service/kubernetes-dashboard        NodePort    10.106.130.53    <none>        443:31283/TCP   9s    k8s-app=kubernetes-dashboard
########################################################

#创建一个admin-user的服务账户并与集群绑定
vi dashboard-adminuser.yaml
##################内容####################
apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kubernetes-dashboard

---

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
  
---
# 创建密钥，获取服务帐户的长期持有者令牌
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
  ##################内容####################
 
  #执行生效
  kubectl apply -f dashboard-adminuser.yaml

#将其保存在/data/dashboard/的admin-user.token文件中
cd /data/dashboard/
kubectl get secret admin-user -n kubernetes-dashboard -o jsonpath={".data.token"} | base64 -d > admin-user.token 

#!/bin/bash
#作者：云
#############描述#############
:<<!
获取长期可用token脚本
将token存放在admin-user.token文件中
!
#############描述#############
kubectl get secret admin-user -n kubernetes-dashboard -o jsonpath={".data.token"} | base64 -d > admin-user.token

echo -e "\033[1;32m创建token成功，请在admin-user.token文件中查看\033[m"

 #定义 token 变量
 DASH_TOCKEN=$(kubectl get secret admin-user -n kubernetes-dashboard -o jsonpath={".data.token"} | base64 -d)
 #设置 kubeconfig 集群条目
 kubectl config set-cluster kubernetes --server=10.10.3.121:6433 --kubeconfig=/root/dashbord-admin.conf
 #设置 kubeconfig 用户条目
 kubectl config set-credentials admin-user --token=$DASH_TOCKEN --kubeconfig=/root/dashbord-admin.conf
 #设置 kubeconfig 上下文条目
 kubectl config set-context admin-user@kubernetes --cluster=kubernetes --user=admin-user --kubeconfig=/root/dashbord-admin.conf
 #设置 kubeconfig 当前上下文
 kubectl config use-context admin-user@kubernetes  --kubeconfig=/root/dashbord-admin.conf

wget https://github.com/kubernetes-sigs/metrics-server/releases/latest/download/components.yaml -O metrics-server-components.yaml

---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    k8s-app: metrics-server
  name: metrics-server
  namespace: kube-system
spec:
  selector:
    matchLabels:
      k8s-app: metrics-server
  strategy:
    rollingUpdate:
      maxUnavailable: 0
  template:
    metadata:
      labels:
        k8s-app: metrics-server
    spec:
      containers:
      - args:
        - --cert-dir=/tmp
        - --secure-port=4443
        - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
        - --kubelet-use-node-status-port
        - --metric-resolution=15s
        - --kubelet-insecure-tls  #添加
        image: registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-server:v0.6.4 #修改
        imagePullPolicy: IfNotPresent

#安装
kubectl apply -f metrics-server-components.yaml

kubectl get pods --all-namespaces | grep metrics

yum -y install bash-completion
source /usr/share/bash-completion/bash_completion
echo 'source <(kubectl completion bash)' >>  ~/.bashrc
bash

#下载yaml文件
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.0.0/deploy/static/provider/baremetal/deploy.yaml
#修改yaml文件中拉取镜像的地址
#####################修改内容######################
willdockerhub/ingress-nginx-controller:v1.0.0
hzde0128/kube-webhook-certgen:v1.0
#####################修改内容######################
#修改Deployment修改成DaemonSet
#修改网络模式为host network
#####################修改内容######################
template:
  spec:
    hostNetwork: true
    dnsPolicy: ClusterFirstWithHostNet
    tolerations:  #使用亲和性配置可在所有节点部署
      - key: node-role.kubernetes.io/control-plane
        operator: Exists
        effect: NoSchedule
     nodeSelector:
          kubernetes.io/os: linux
          custem/ingress-controller-ready: 'true'
      containers:
        - name: controller
#####################修改内容######################
#为工作节点设置标签（必需）
kubectl label nodes future-k8s-node0 custem/ingress-controller-ready=true
kubectl label nodes future-k8s-node1 custem/ingress-controller-ready=true
kubectl label nodes future-k8s-node2 custem/ingress-controller-ready=true
kubectl label nodes future-k8s-node3 custem/ingress-controller-ready=true

#安装
kubectl apply -f deploy.yaml

#查看状态
kubectl get pods -n ingress-nginx
################状态##################
NAME                                       READY   STATUS      RESTARTS   AGE
ingress-nginx-admission-create-2lz4v       0/1     Completed   0          5m46s
ingress-nginx-admission-patch-c6896        0/1     Completed   0          5m46s
ingress-nginx-controller-7575fb546-q29qn   1/1     Running     0          5m46s

echo '
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: k8s-dashboard
  namespace: kubernetes-dashboard
  labels:
    ingress: k8s-dashboard
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /  #重写路径
    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"  #http自动转https
    nginx.ingress.kubernetes.io/use-regex: "true"
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"

spec:
  ingressClassName: nginx 
  rules:
    - host: k8s.yjs.51xueweb.cn
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: kubernetes-dashboard
                port:
                  number: 443
' > /data/dashboard/dashboard-ingress.yaml