Centos7 安装 Kubernetes 集群详细步骤（安装篇）_运维_weixin

主机名	ip	备注
k8s_master	192.168.234.130	Master&etcd
k8s_node1	192.168.234.131	Node1
k8s_node2	192.168.234.132	Node2

Kubernetes 是goole开源的大规模容器集群管理系统，使用centos7 自带的Kubernetes 组件、分布式键值存储系统etcd 以及flannel 实现Docker容器中跨容器访问。

（集群环境需要ntp时钟一致，因为是云的机器，系统默认有时钟核对）

第一步组件安装

Master节点：

systemctl stop firewalld && sudo systemctl disable firewalld

yum install -y kubernetes etcd docker flannel

Node节点：

systemctl stop firewalld && sudo systemctl disable firewalld

yum install -y kubernetes docker flannel

第二步配置

节点

运行服务

Master

etcd

kube-apiserver

kube-controller-manager

kube-scheduler

kube-proxy

kubelet

docker

flanneld

node

flanneld

docker

kube-proxy

kubelet

Master:

hostnamectl set-hostname k8s_master

vi /etc/hosts

192.168.234.130 k8s_master

192.168.234.131 k8s_node1

192.168.234.132 k8s_node2

etcd配置

vi /etc/etcd/etcd.conf

ETCD_NAME=default

ETCD_DATA_DIR="/var/lib/etcd/default.etcd"

ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"

ETCD_ADVERTISE_CLIENT_URLS=http://localhost:2379

apiserver 配置

vi /etc/kubernetes/apiserver

KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0" (apiserver绑定主机的非安全IP地址）

KUBE_API_PORT="--port=8080" (apiserver绑定主机的非安全端口号）

KUBELET_PORT="--kubelet-port=10250"

KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.234.130:2379"

KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=192.168.234.0/24" （虚机同一网段）

KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"

KUBE_API_ARGS=""

Kubelet配置

vi /etc/kubernetes/kubelet

KUBELET_ADDRESS="--address=0.0.0.0"

KUBELET_PORT="--port=10250"

KUBELET_HOSTNAME="--hostname-override=192.168.234.130"

KUBELET_API_SERVER="--api-servers=http://192.168.234.130:8080"

KUBELET_POD_INFRA_CONTAINER="--pod-infra-Container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"

KUBELET_ARGS=""

config配置

vi /etc/kubernetes/config

KUBE_LOGTOSTDERR="--logtostderr=true"

KUBE_LOG_LEVEL="--v=0"

KUBE_ALLOW_PRIV="--allow-privileged=false"

KUBE_MASTER="--master=http://192.168.234.130:8080"

scheduler和 proxy 暂时没有用到，就不需要配置

flannel 配置

vi /etc/sysconfig/flanneld

FLANNEL_ETCD="http://192.168.234.130:2379"

FLANNEL_ETCD_KEY="/atomic.io/network"

etcdctl set修改get查询。不管是修改还是创建的时候，配置文件必须完整/coreos.com/network/config，要不然启动会报错。

添加网络：

systemctl enable etcd.service

systemctl start etcd.service

etcdctl mk //atomic.io/network/config '{"Network":"172.17.0.0/16"}' 创建

etcdctl rm //atomic.io/network/config '{"Network":"172.17.0.0/16"}' 删除

Master启动：

for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler kube-proxy kubelet docker flanneld ; do systemctl restart $SERVICES; systemctl enable $SERVICES; systemctl status $SERVICES; done;

node配置：

hostnamectl set-hostname k8s_node1/2