Kubernetes集群部署

Kubernetes

什么是kubernetes就不介绍了，直接来部署。

本文示例安装环境

3台虚拟机(1台master主节点,2台node工作节点)
master：192.168.188.151
node1 ：192.168.188.152
node2 ：192.168.188.153

部署master节点

• 安装etcd和Kubernetes

yum -y install etcd kubernetes

• 配置etcd

#查看etcd配置文件
cat /etc/etcd/etcd.conf |grep -Ev '^[[:space:]].*|^#'
#修改配置
vim /etc/etcd/etcd.conf
#etcd配置
TCD_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"

• 配置Kubernetes API Server

#查看apiserver配置文件
cat /etc/kubernetes/apiserver |grep -Ev '^[[:space:]].*|^#'
#修改配置
vim /etc/kubernetes/apiserver
#apiserver配置
KUBE_API_ADDRESS="--address=0.0.0.0"
KUBE_API_PORT="--port=8080"
KUBELET_PORT="--kubelet-port=10250"
KUBE_ETCD_SERVERS="--etcd-servers=http://127.0.0.1:2379"
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"
KUBE_API_ARGS=""

• 启动etcd、kube-apiserver、kube-controller-manager、kube-scheduler服务

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

• 在etcd中配置flannel网络

#设置网段
etcdctl mk /atomic.io/network/config '{"Network":"172.10.0.0/16"}'
#查看设置是否成功
etcdctl get /atomic.io/network/config

部署node节点

• 安装flannel和Kubernetes

yum -y install flannel kubernetes

• 配置flannel

cat /etc/sysconfig/flanneld |grep -Ev '^[[:space:]].*|^#'
#修改flannel配置
vim /etc/sysconfig/flanneld
#flannel配置   修改ENDPOINTS为master节点的ip
FLANNEL_ETCD_ENDPOINTS="http://192.168.188.151:2379"
FLANNEL_ETCD_PREFIX="/atomic.io/network"

-配置Kubernetes

#查看kubernetes配置文件
cat /etc/kubernetes/config |grep -Ev '^[[:space:]].*|^#'
#修改Kubernetes配置
vim /etc/sysconfig/flanneld
#Kubernetes配置   修改KUBE_MASTER为master节点的ip
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://192.168.188.151:8080"

-配置kubelet

#修改kubelet配置
vim /etc/sysconfig/flanneld
#kubelet配置   修改HOSTNAME为自身节点的ip，API_SERVER为master节点的ip
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_PORT="--port=10250"
KUBELET_HOSTNAME="--hostname-override=192.168.188.152"
KUBELET_API_SERVER="--api-servers=http://192.168.188.151:8080"
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
KUBELET_ARGS=""

• 开启kube-proxy，kubelet，docker，flanneld服务

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

环境验证

• 回到master节点服务器，输入

kubectl get nodes

验证

会发现两个node节点的状态已经处于Ready状态了。