Kubernetes架構

Kubernetes的整體架構如下：

Master為主控節點，上面運行apiserver，scheduler，controller-manager等組件。Minion相當于工作節點，上面運行kubelet，proxy，cAdvisor以及最重要的docker等組件。下面來實際部署一下這套集群管理工具。

環境

yy1  10.193.6.35

yy2  10.193.6.36

yy1作為master，yy2作為minion。

# cat /etc/centos-release

CentOS Linux release 7.0.1406 (Core) 

安裝kubernetes

# curl https://copr.fedoraproject.org/coprs/eparis/kubernetes-epel-7/repo/epel-7/eparis-kubernetes-epel-7-epel-7.repo -o /etc/yum.repos.d/eparis-kubernetes-epel-7-epel-7.repo# yum install kubernetes -y

配置yy1

# cat /etc/kubernetes/apiserver#### kubernetes system config## The following values are used to configure the kubernetes-apiserver# # The address on the local server to listen to.KUBE_API_ADDRESS="10.193.6.35" # The port on the local server to listen on.KUBE_API_PORT="8080" # How the replication controller and scheduler find the apiserverKUBE_MASTER="10.193.6.35:8080" # Comma seperated list of minionsMINION_ADDRESSES="10.193.6.36" # Port minions listen onMINION_PORT="10250" # cat /etc/kubernetes/config#### kubernetes system config## The following values are used to configure various aspects of all# kubernetes services, including##  kubernetes-apiserver.service#  kubernetes-controller-manager.service#  kubernetes-kubelet.service#  kubernetes-proxy.service # Comma seperated list of nodes in the etcd clusterKUBE_ETCD_SERVERS="http://10.193.6.35:4001" # logging to stderr means we get it in the systemd journalKUBE_LOGTOSTDERR="true" # journal message level, 0 is debugKUBE_LOG_LEVEL=0 # Should this cluster be allowed to run privleged docker containersKUBE_ALLOW_PRIV="true"

啟動yy1上相關服務

master上需要運行etcd，kube-apiserver，kube-controller-manager，kube-scheduler這4個進程。

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

配置yy2

# cat /etc/kubernetes/kubelet#### kubernetes kublet (minion) config # The address for the info server to serve onMINION_ADDRESS="10.193.6.36" # The port for the info server to serve onMINION_PORT="10250"# You may leave this blank to use the actual hostnameMINION_HOSTNAME="10.193.6.36"# cat /etc/kubernetes/config #### kubernetes system config## The following values are used to configure various aspects of all# kubernetes services, including##  kubernetes-apiserver.service#  kubernetes-controller-manager.service#  kubernetes-kubelet.service#  kubernetes-proxy.service# Comma seperated list of nodes in the etcd clusterKUBE_ETCD_SERVERS="http://10.193.6.35:4001" # logging to stderr means we get it in the systemd journalKUBE_LOGTOSTDERR="true"# journal message level, 0 is debugKUBE_LOG_LEVEL=0# Should this cluster be allowed to run privleged docker containersKUBE_ALLOW_PRIV="true"