部署环境：
CentOS Linux release 7.2 64位
10.10.0.103 node01
10.10.0.49 node02
安装过程：
# yum install flannel
# tar zxf flannel-v0.8.0-linux-amd64_.tar.gz
# cp flanneld /usr/bin/
# cp mk-docker-opts.sh /usr/bin/
编辑服务配置文件：
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#cat /usr/lib/systemd/system/flanneld.service
[Unit]
Description=flanneld overlay address etcd agent
After=network.target
Before=docker.service
[Service]
Type=notify
EnvironmentFile=
/etc/sysconfig/flannel
ExecStart=
/usr/bin/flanneld
-etcd-endpoints=${FLANNEL_ETCD} $FLANNEL_OPTIONS
[Install]
RequiredBy=docker.service
WantedBy=multi-user.target
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编辑配置文件：
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#cat /etc/sysconfig/flannel
FLANNEL_ETCD=
"http://10.10.0.103:2379,http://10.10.0.49:2379"
FLANNEL_ETCD_KEY=
"/coreos.com/network"
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在etcd库中添加一条网络配置信息，flannel用来分配docker的虚拟ip地址段：
# etcdctl set /coreos.com/network/config
# etcdctl get /coreos.com/network/config
{ "Network": "10.1.0.0/16" }
# systemctl start flanneld
# mk-docker-ops.sh -i
# source /run/flannel/subnet.env
# ifconfig docker0 ${FLANNEL_SUBMENT}
#ifconfig 查看docker网卡ip
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docker0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.1.8.1 netmask 255.255.255.0 broadcast 10.1.8.255
ether 02:42:bf:cb:f1:ff txqueuelen 0 (Ethernet)
RX packets 40369 bytes 8671191 (8.2 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 40663 bytes 3818695 (3.6 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.10.0.103 netmask 255.255.0.0 broadcast 10.10.255.255
ether 00:16:3e:08:93:f7 txqueuelen 1000 (Ethernet)
RX packets 2033352 bytes 695497718 (663.2 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1378035 bytes 2166169069 (2.0 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
flannel0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1472
inet 10.1.8.0 netmask 255.255.0.0 destination 10.1.8.0
unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 500 (UNSPEC)
RX packets 6 bytes 504 (504.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 6 bytes 504 (504.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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另一个节点同样重复以上安装步骤。
本文转自 baiying 51CTO博客，原文链接：http://blog.51cto.com/baiying/1967156，如需转载请自行联系原作者
