kubernetes 组件图

初略的概念

master节点 kube-apiserver restful设计的一个api server kube-scheduler 调度器,基本上不加参数 etcd k,v store kube-controller-manager

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node节点 kube-proxy 代理 kubelet node agent docker 这个不用说了,容器

下面附kubernetes安装过程。centos7

1.repo源

[virt7-docker-common-release]name=virt7-docker-common-releasebaseurl=http://cbs.centos.org/repos/virt7-docker-common-release/x86_64/os/gpgcheck=0

2.在所有节点安装kubernetes和etcd

yum -y install --enablerepo=virt7-docker-common-release kubernetes etcd

3.写hosts文件

vim /etc/hosts192.168.121.9       centos-master192.168.121.65  centos-minion

4.配置/etc/kubernetes/config

KUBE_ETCD_SERVERS="--etcd-servers=http://centos-master:2379"KUBE_LOGTOSTDERR="--logtostderr=true"# journal message level, 0 is debugKUBE_LOG_LEVEL="--v=0"# Should this cluster be allowed to run privileged docker containersKUBE_ALLOW_PRIV="--allow-privileged=false"# How the controller-manager, scheduler, and proxy find the apiserverKUBE_MASTER="--master=http://centos-master:8080"

5.关闭防火墙

systemctl disable iptables-services firewalldsystemctl stop iptables-services firewalld

6.配置etcd

/etc/etcd/etcd.conf

# [member]ETCD_NAME=defaultETCD_DATA_DIR="/var/lib/etcd/default.etcd"ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"#[cluster]ETCD_ADVERTISE_CLIENT_URLS="http://0.0.0.0:2379"

7.配置apiserver

/etc/kubernetes/apiserver

KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"#  KUBE_API_ADDRESS="--insecure-bind-address=127.0.0.1"# The port on the local server to listen on.KUBE_API_PORT="--port=8080"# Port minions listen onKUBELET_PORT="--kubelet-port=10250"# Comma separated list of nodes in the etcd clusterKUBE_ETCD_SERVERS="--etcd-servers=http://127.0.0.1:2379"# Address range to use for servicesKUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.0.0.0/16"# default admission control policiesKUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"# KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"# Add your own!KUBE_API_ARGS=""

8.起服务(master)

for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler; do    systemctl restart $SERVICES    systemctl enable $SERVICES    systemctl status $SERVICESdone

9.在minion上配置kubelet

/etc/kubernetes/kubelet

# The address for the info server to serve onKUBELET_ADDRESS="--address=0.0.0.0"# The port for the info server to serve onKUBELET_PORT="--port=10250"# You may leave this blank to use the actual hostnameKUBELET_HOSTNAME="--hostname-override=centos-minion"# Location of the api-serverKUBELET_API_SERVER="--api-servers=http://centos-master:8080"# Add your own!KUBELET_ARGS=""

10.在minion节点上起服务

for SERVICES in kube-proxy kubelet docker; do    systemctl restart $SERVICES    systemctl enable $SERVICES    systemctl status $SERVICESdone

11.查看node状态

$ kubectl get nodesNAME                   LABELS            STATUScentos-minion          <none>            Ready