使用sealos部署kubernetes集群
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使用sealos部署kubernetes集群
本次使用3台主机完成，其中2台主机为master节点，1台主机为worker节点。
一、主机准备
1.1 配置主机名
# hostnamectl set-hostname xxx k8s-master01 k8s-master02 k8s-worker01
1.2 设置静态IP地址
| 序号 | 主机名 | 主机IP |
|---|---|---|
| 1 | k8s-master01 | 192.168.10.11 |
| 2 | k8s-master02 | 192.168.10.12 |
| 4 | k8s-worker01 | 192.168.10.13 |
#三台机器分别设置 # vim /etc/sysconfig/network-scripts/ifcfg-ens33 TYPE="Ethernet" PROXY_METHOD="none" BROWSER_ONLY="no" BOOTPROTO="none" 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="ec87533a-8151-4aa0-9d0f-1e970affcdc6" DEVICE="ens33" ONBOOT="yes" IPADDR="192.168.10.xxx" PREFIX="24" GATEWAY="192.168.10.2" DNS1="119.29.29.29"
1.3 配置主机名与IP地址解析
下面解析是管理员添加，sealos在运行过程中，也会自动添加主机名与IP地址解析关系。
在3台服务器中都要在host文件中添加此ip对应主机
# vim /etc/hosts 192.168.10.11 k8s-master01 192.168.10.12 k8s-master02 192.168.10.13 k8s-worker01
# 重启网络服务
systemctl restart network
1.4 升级内核
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
yum -y install https://www.elrepo.org/elrepo-release-7.0-4.el7.elrepo.noarch.rpm
yum --enablerepo="elrepo-kernel" -y install kernel-lt.x86_64
awk -F \' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg
grub2-set-default "CentOS Linux (5.4.204-1.el7.elrepo.x86_64) 7 (Core)"
reboot
1.5 初始化环境
每台机器都需要进行初始化环境
#关闭防火墙 systemctl stop firewalld systemctl disable firewalld #关闭selinux sed -i 's/enforcing/disabled/' /etc/selinux/config # 永久 setenforce 0 # 临时 #关闭swap swapoff -a # 临时 sed -ri 's/.*swap.*/#&/' /etc/fstab # 永久 #时间同步 yum install ntpdate -y ntpdate time.windows.com #master执行,配置ssh免密登录，生成一直敲回车即可 ssh-keygen -R 192.168.10.11 #master执行，拷贝ssh秘钥到其他节点 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.10.12 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.10.13
二、sealos准备
下载安装sealos
#下载sealos wget https://github.com/labring/sealos/releases/download/v4.3.7/sealos_4.3.7_linux_amd64.tar.gz #解压并赋权 tar zxvf sealos_4.3.7_linux_amd64.tar.gz sealos && chmod +x sealos && mv sealos /usr/bin #测试 sealos version
三、使用sealos部署kubernetes集群
kubernetes集群默认使用containerd
#sealos生成配置文件，镜像替换成阿里云。镜像替换可访问https://explore.ggcr.dev/ sealos gen registry.cn-shanghai.aliyuncs.com/labring/kubernetes-docker:v1.21.0 registry.cn-shanghai.aliyuncs.com/labring/helm:v3.8.2 registry.cn-shanghai.aliyuncs.com/labring/calico:v3.22.1 \ --masters 192.168.10.11,192.168.10.12 \ --nodes 192.168.10.13 --passwd 123456 --port 22 --output Clusterfile
#执行文件 sealos apply -f Clusterfile
这里需要等待一段时间，安装成功后如图：
验证集群是否正常
# kubectl get nodes NAME STATUS ROLES AGE VERSION k8s-master01 Ready control-plane 16h v1.24.0 k8s-master02 Ready control-plane 16h v1.24.0 k8s-master03 Ready control-plane 16h v1.24.0 k8s-worker01 Ready <none> 16h v1.24.0
# kubectl get pods -n kube-system NAME READY STATUS RESTARTS AGE coredns-6d4b75cb6d-59ph5 1/1 Running 1 (15h ago) 16h coredns-6d4b75cb6d-wz6tx 1/1 Running 1 (15h ago) 16h etcd-k8s-master01 1/1 Running 1 (15h ago) 16h etcd-k8s-master02 1/1 Running 1 (15h ago) 16h etcd-k8s-master03 1/1 Running 1 (15h ago) 16h kube-apiserver-k8s-master01 1/1 Running 3 (15h ago) 16h kube-apiserver-k8s-master02 1/1 Running 1 (15h ago) 16h kube-apiserver-k8s-master03 1/1 Running 1 (15h ago) 16h kube-controller-manager-k8s-master01 1/1 Running 3 (15h ago) 16h kube-controller-manager-k8s-master02 1/1 Running 1 (15h ago) 16h kube-controller-manager-k8s-master03 1/1 Running 1 (15h ago) 16h kube-proxy-5l26r 1/1 Running 1 (15h ago) 16h kube-proxy-cfbkh 1/1 Running 1 (15h ago) 16h kube-proxy-g92fs 1/1 Running 1 (15h ago) 16h kube-proxy-zsjxv 1/1 Running 1 (15h ago) 16h kube-scheduler-k8s-master01 1/1 Running 3 (15h ago) 16h kube-scheduler-k8s-master02 1/1 Running 1 (15h ago) 16h kube-scheduler-k8s-master03 1/1 Running 1 (15h ago) 16h kube-sealyun-lvscare-k8s-worker01 1/1 Running 1 (15h ago) 16h
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