docker使用etcd,flannel实现容器跨主机通信

• 环境

centos 192.168.3.65
centos 192.168.3.66

• 全部关闭防火墙(关闭防火墙docker需要重启)

systemctl stop firewalld

• 在192.168.3.65上 单节点部署etcd

yum install etcd

cp /etc/etcd/etcd.conf /etc/etcd/etcd.conf.bak
vi /etc/etcd/etcd.conf

修改etcd.conf如下：
[Member]
ETCD_LISTEN_CLIENT_URLS="http://192.168.3.65:2379,http://127.0.0.1:2379"
[Clustering]
ETCD_ADVERTISE_CLIENT_URLS="http://192.168.3.65:2379"

systemctl start etcd

设置etcd的网络

etcdctl mk /atomic.io/network/config '{"Network":"172.17.0.0/16", "SubnetMin": "172.17.1.0", "SubnetMax": "172.17.254.0"}'

• 两台server安装flannel和配置

yum install -y flannel
cp /etc/sysconfig/flanneld /etc/sysconfig/flanneld.bak
vi /etc/sysconfig/flanneld

修改flanneld文件：
FLANNEL_ETCD_ENDPOINTS="http://192.168.3.65:2379"

systemctl start flanneld.service