centos7.5安装kubernetes1.25.0

centos7.5+kubernetes

kubelet-1.25.0 kubeadm-1.25.0 kubectl-1.25.0

1）准备阶段

1. 准备2台虚拟机

ip	hostname
192.168.8.201	k8smaster
192.168.8.202	k8snode1

2. 配置静态IP

vim /etc/sysconfig/network-scripts/ifcfg-ens33

TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens33
UUID=990edb7d-58b0-486f-ad5a-41045ac8ee58
DEVICE=ens33
ONBOOT=yesIPADDR=192.168.8.201
NETMASK=255.255.255.0
GATEWAY=192.168.8.1
DNS1=192.168.8.1
ZONE=public

service network restart

3. 修改主机名

#k8smaster
[root@localhost ~] hostname
localhost.localdomain
[root@localhost ~] hostname k8smaster ##临时生效
[root@localhost ~] hostnamectl set-hostname k8smaster ##重启后永久生效#k8snode1  
[root@localhost ~] hostname
localhost.localdomain
[root@localhost ~] hostname k8snode1  ##临时生效
[root@localhost ~] hostnamectl set-hostname k8snode1  ##重启后永久生效

4. 桥接设置

$ modprobe br_netfilter
echo "modprobe br_netfilter" >> /etc/profile
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

$ sysctl --system

5. 配置阿里云的repo源

修改 /etc/yum.repos.d/CentOS-Base.repo#mirrorlist=http://baseurl=http://vault.centos.org/centos/$releaseveryum install -y yum-utils
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

6. 配置k8s切国际源

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

7. 配置时间同步

#yum install ntpdate -y
#ntpdate cn.pool.ntp.org

8. 安装基础软件包

#yum install -y device-mapper-persistent-data lvm2 wget net-tools nfs-utils lrzsz gcc gcc-c++ make cmake libxml2-devel openssl-devel curl curl-devel unzip sudo ntp libaio-devel wget vim ncurses-devel autoconf automake zlib-devel  python-devel epel-release openssh-server socat  ipvsadm conntrack telnet ipvsadm

2)安装containerd服务

1. 安装

yum install containerd.io-1.6.6 -y

1. 生成配置mkdir -p /etc/containerdcontainerd config default > /etc/containerd/config.toml#修改config.toml[plugins."io.containerd.grpc.v1.cri"]sandbox_image = "registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.7"[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]SystemdCgroup = true2配置文件---暂时不用配置cat > /etc/crictl.yaml << EOF 
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF

2. 配置开启启动

systemctl enable containerd --now

3)安装k8s

1.安装

yum install -y kubelet-1.25.0 kubeadm-1.25.0 kubectl-1.25.0
systemctl enable kubelet

2.初始化集群 —master节点执行

kubeadm init --apiserver-advertise-address 192.168.8.201 --image-repository registry.cn-hangzhou.aliyuncs.com/google_containers --cri-socket “unix:///var/run/containerd/containerd.sock” --kubernetes-version 1.25.0

3.打标签

kubectl label nodes k8snode1 node-role.kubernetes.io/work=work

4.安装pod网络插件flannel

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

5.查看依赖的镜像/拉取镜像

kubeadm config images list
kubeadm config images pull

6.初始化master节点（成功之后生成token，node节点加入需要）

kubeadm init
–apiserver-advertise-address=192.168.8.201
–image-repository registry.aliyuncs.com/google_containers
–kubernetes-version=v1.25.0
–service-cidr=10.96.0.0/12
–pod-network-cidr=10.244.0.0/16
–v=5

7.安装calico

curl https://projectcalico.docs.tigera.io/archive/v3.23/manifests/calico.yaml -O
修改CALICO_IPV4POOL_CIDR

---

value: “10.244.0.0/16”

---

kubectl apply -f calico.yaml #应用

8.node节点

将kubelet 的配置复制到用户目录
sudo mkdir -p $HOME/.kube
sudo cp /etc/kubernetes/kubelet.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

node节点加入master
kubeadm join 192.168.8.201:6443 --token jstf23.au132wb83awk4zk6 \--discovery-token-ca-cert-hash sha256:9324351934967a1d59ea97525d92172a46ec1311a192236ee5294b6f5ae0dfe4

4)安装kubersphere

1. 下载helm安装包

wget https://get.helm.sh/helm-v3.10.0-linux-amd64.tar.gz

2. 解压

tar -zxvf helm-v3.10.0-linux-amd64.tar.gz

3. 将helm配置成系统命令

mv linux-amd64/helm /usr/local/bin/helm

4. 通过helm安装KubeSphere的核心组件KubeSphere Core

helm upgrade --install -n kubesphere-system --create-namespace ks-core https://charts.kubesphere.com.cn/main/ks-core-1.1.3.tgz --debug --wait
–set global.imageRegistry=swr.cn-southwest-2.myhuaweicloud.com/ks
–set extension.imageRegistry=swr.cn-southwest-2.myhuaweicloud.com/ks
–set hostClusterName=k8s-paco

5. 安装成功之后显示地址和账号密码

1. Wait for Deployment CompletionConfirm that all KubeSphere components are running by executing the following command:kubectl get pods -n kubesphere-system
2. Access the KubeSphere ConsoleOnce the deployment is complete, you can access the KubeSphere console using the following URL:http://192.168.8.201:30880
3. Login to KubeSphere ConsoleUse the following credentials to log in:Account: adminPassword: xxxxxx

ps 命令

journalctl -u kubelet 查看错误日志kubectl get pods -Akubectl delete pod <podname> -n <namespace>kubectl get deployment --all-namespaceskubectl delete deployment <deploymentname> -n <namespace>kubectl describe node <node-name>