k8s节点简单部署
K8s集群v1.26.1版本的简单部署实践
K8s集群v1.26.1版本的简单部署实践
使用cri-dockerd+calico+kubernetes-dashboard
一、 主节点部署
环境说明
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主节点k8s-master IP:192.168.31.41
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Node1 k8s-node1 IP:192.168.31.121
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Node2 k8s-node2 IP:192.168.31.122
均为CentOS7.9 最小化安装
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先创建脚本k8s_init.sh
1)、其中阿里云docker镜像加速的URL 脚本中这一行："registry-mirrors": ["https://XXXXX.mirror.aliyuncs.com"],请自行替换
2)、脚本中/etc/hosts内容请自行替换成实际服务器IP地址
3)、脚本中hostnamectl set-hostname k8s-master 请自行替换成实际服务器的主机名
脚本内容如下
#!/bin/bash
cat >> /etc/hosts << EOF
192.168.31.41 k8s-master
192.168.31.121 k8s-node1
192.168.31.122 k8s-node2
EOF
hostnamectl set-hostname k8s-master
systemctl restart rsyslog
swapoff -a
sed -ri 's/.*swap.*/#&/' /etc/fstab
systemctl stop firewalld
systemctl disable firewalld
sed -i 's/enforcing/disabled/' /etc/selinux/config
setenforce 0
cat >> /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
sysctl --system
yum install ntpdate -y
ntpdate ntp.aliyun.com
yum install -y yum-utils device-mapper-persistent-data lvm2
# Step 2: 添加软件源信息
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# Step 3
sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo
# Step 4: 更新并安装Docker-CE
yum makecache fast
yum -y install docker-ce
# Step 4: 开启Docker服务
mkdir -p /data/docker
sed -i "s#ExecStart=/usr/bin/dockerd -H fd://#ExecStart=/usr/bin/dockerd --data-root /data/docker -H fd://#g" /lib/systemd/system/docker.service
cat /lib/systemd/system/docker.service | grep ExecStart
systemctl daemon-reload
mkdir -p /etc/docker/
touch /etc/docker/daemon.json
cat > /etc/docker/daemon.json << \EOF
{
"bip": "10.112.0.1/24",
"registry-mirrors": ["https://XXXXX.mirror.aliyuncs.com"],
"exec-opts": ["native.cgroupdriver=systemd"]
}
EOF
systemctl enable docker
systemctl restart docker
docker version
rpm -ivh cri-dockerd-0.3.1-3.el7.x86_64.rpm
sed -i "s#ExecStart=/usr/bin/cri-dockerd --container-runtime-endpoint fd://#ExecStart=/usr/bin/cri-dockerd --container-runtime-endpoint fd:// --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.7#g" /usr/lib/systemd/system/cri-docker.service
systemctl daemon-reload
systemctl enable cri-docker.service
systemctl restart cri-docker.service
systemctl restart docker
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
exclude=kubelet kubeadm kubectl
EOF
yum install -y kubelet-1.26.1 kubeadm-1.26.1 kubectl-1.26.1 --disableexcludes=kubernetes
systemctl enable kubelet
二、master节点安装k8s基础环境
master节点rz上传cri-dockerd-0.3.1-3.el7.x86_64.rpm 和calico_dashboard.tar.gz
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sh k8s_init.sh安装k8s基础环境
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三、master节点进行kubeadm init初始化
kubeadm init --apiserver-advertise-address=192.168.31.41 --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.26.1 --pod-network-cidr=10.244.0.0/16 --service-cidr=10.96.0.0/12 --cri-socket=unix:///var/run/cri-dockerd.sock --ignore-preflight-errors=all
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--apiserver-advertise-address=192.168.31.41为master节点IP地址
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初始化完成后按提示执行
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config四、Node节点使用脚本部署k8s基础环境
Node1和Node2 工作节点只需上传cri-dockerd-0.3.1-3.el7.x86_64.rpm
然后使用k8s_init.sh安装k8s基础环境，过程截图略
五、Node节点加入集群
使用主节点kukeadm init最后的提示命令
kubeadm join 192.168.31.41:6443 --token 92zebh.ntfkdtf5l5aff5pf \
--discovery-token-ca-cert-hash sha256:54f456308e46c78f65ccf6fbbd2b7b77b6bd79c9c465e169393d4035e868cfda --cri-socket=unix:///var/run/cri-dockerd.sock
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加入集群后kubectl get nodes可以看到node1节点
kubectl get nodes
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六、master节点安装calico网络插件
tar -zxvf calico_dashboard.tar.gz
kubectl apply -f calico.yaml
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tail -f /var/log/messages可以看到在拉取calico的docker镜像
tail -f /var/log/messages
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kubectl get svc,pods -o wide -n kube-system
也可以看到在创建calico的pods
kubectl get svc,pods -o wide -n kube-system
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待calico pods为running状态时 kubectl get nodes -o wide可以看到nodes为Ready状态了
kubectl get nodes -o wide
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这时K8s集群创建完成
当然我这里只测试了1个节点K8s-node1
七、安装kubernetes-dashboard
kubectl apply -f kubernetes-dashboard2.7.yaml
kubectl get svc,pods -o wide -n kubernetes-dashboard
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创建Token
kubectl create serviceaccount dashboard-admin -n kube-system
kubectl create clusterrolebinding dashboard-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin
kubectl create token dashboard-admin -n kube-system
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这时使用这个Token就可以正常登录kubernetes-dashboard
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以上就是K8s集群v1.26.1版本的部署过程：cri-dockerd+calico+kubernetes-dashboard
Tips
本文使用的cri-dockerd-0.3.1-3.el7.x86_64.rpm 和calico_dashboard.tar.gz 下载链接如下
链接：https://share.weiyun.com/29fFxnyV 密码：tjciyu
