快速部署Kubernetes集群管理

这篇文章介绍了如何快速部署一套Kubernetes集群,下面就快速开始吧！

准备工作

//关闭防火墙
systemctl stop firewalld.service
systemctl disable firewalld.service

//关闭selinux,修改/etc/selinux/config
SELINUX=disabled

机器部署规划

主机	IP	部署组件
master主节点	192.168.199.206	etcd、kube-apiserver、kube-controller-manager、kube-scheduler
node1子节点	192.168.199.159	kubelet、kube-proxy、docker
node2子节点	192.168.199.175	kubelete、kube-proxy、docker

k8s组件采用yum安装的方式，快速安装。

Master节点

//安装etcd
[root@206 ~]# yum install -y etcd

//修改/etc/etcd/etcd.conf配置文件
[root@206 ~]# vim /etc/etcd/etcd.conf
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
ETCD_ADVERTISE_CLIENT_URLS="http://192.168.199.206:2379"

//配置etcd内网信息
[root@206 ~]# etcdctl set /atomic.io/network/config '{"Network":"172.17.0.0/16"}'
ps:其中网络号172.17.0.0/16与docker中的docker0网络一致(若不一致，可修改docker0网络或者配置上述etcd网络);
atomic.io与下面的Flannel配置中的FLANNEL_ETCD_PREFIX对应;

//运行etcd服务
[root@206 ~]# systemctl start etcd
[root@206 ~]# systemctl enbale etcd

//安装kubernetes-master
[root@206 ~]# yum install -y kubernetes-master

//修改/etc/kubernetes/apiserver配置文件
[root@206 ~]# vim /etc/kubernetes/apiserver
KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.199.206:2379"

//修改/etc/kubernetes/config配置文件
[root@206 ~]# vim /etc/kubernetes/config
KUBE_MASTER="--master=http://192.168.199.206:8080"

//运行master服务
[root@206 ~]# systemctl start kube-apiserver kube-scheduler kube-controller-manager
[root@206 ~]# systemctl enable kube-apiserver kube-scheduler kube-controller-manager 

//测试服务,若输出以下数据，则服务正常。
[root@206 ~]# curl -l http://192.168.199.206:8080
{
  "paths": [
    "/api",
    "/api/v1",
    "/apis",
    "/apis/apps",
    "/apis/apps/v1beta1",
    "/apis/authentication.k8s.io",
    "/apis/authentication.k8s.io/v1beta1",
    "/apis/authorization.k8s.io",
    "/apis/authorization.k8s.io/v1beta1",
    "/apis/autoscaling",
    "/apis/autoscaling/v1",
    "/apis/batch",
    "/apis/batch/v1",
    "/apis/batch/v2alpha1",
    "/apis/certificates.k8s.io",
    "/apis/certificates.k8s.io/v1alpha1",
    "/apis/extensions",
    "/apis/extensions/v1beta1",
    "/apis/policy",
    "/apis/policy/v1beta1",
    "/apis/rbac.authorization.k8s.io",
    "/apis/rbac.authorization.k8s.io/v1alpha1",
    "/apis/storage.k8s.io",
    "/apis/storage.k8s.io/v1beta1",
    "/healthz",
    "/healthz/ping",
    "/healthz/poststarthook/bootstrap-controller",
    "/healthz/poststarthook/extensions/third-party-resources",
    "/healthz/poststarthook/rbac/bootstrap-roles",
    "/logs",
    "/metrics",
    "/swaggerapi/",
    "/ui/",
    "/version"
  ]

Node节点(159和175安装方法一样)

//安装docker
[root@159 ~]# yum install -y docker

//安装flannel
[root@159 ~]# yum install -y flannel

//修改/etc/sysconfig/flannel配置文件
[root@159 ~]# vim /etc/sysconfig/flannel
FLANNEL_ETCD_ENDPOINTS="http://192.168.199.206:2379"

//安装kubernetes-note
[root@159 ~]# yum install -y kubernetes-node

//修改/etc/kubernetes/config配置文件
[root@159 ~]# vim /etc/kubernetes/config
KUBE_MASTER="--master=http://192.168.199.206:8080"

//修改/etc/kubernetes/kubelet配置文件
[root@159 ~]# vim /etc/kubernetes/kubelet
KUBELET_HOSTNAME="--hostname-override=192.168.199.159"
KUBELET_API_SERVER="--api-servers=http://192.168.199.206:8080"

//运行服务
systemctl enable kubelet kube-proxy
systemctl start kubelet kube-proxy

在Master机器上管理Node节点

[root@206 ~]# kubectl get nodes
NAME              STATUS    AGE
192.168.199.159   Ready     32m
192.168.199.175   Ready     4m