kubernetes集群网络配置方案——flannel部署
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：1
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#cat /usr/lib/systemd/system/flanneld.service
Description=flanneld overlay address etcd agent
After=network.target
Before=docker.service
Type=notify
EnvironmentFile=/etc/sysconfig/flannel
ExecStart=/usr/bin/flanneld -etcd-endpoints=${FLANNEL_ETCD} $FLANNEL_OPTIONS
RequiredBy=docker.service
WantedBy=multi-user.target
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"
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 10.1.8.1netmask 255.255.255.0broadcast 10.1.8.255
ether 02:42:bf:cb:f1:fftxqueuelen 0(Ethernet)
RX packets 40369bytes 8671191 (8.2 MiB)
RX errors 0dropped 0overruns 0frame 0
TX packets 40663bytes 3818695 (3.6 MiB)
TX errors 0dropped 0 overruns 0carrier 0collisions 0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>mtu 1500
inet 10.10.0.103netmask 255.255.0.0broadcast 10.10.255.255
ether 00:16:3e:08:93:f7txqueuelen 1000(Ethernet)
RX packets 2033352bytes 695497718 (663.2 MiB)
RX errors 0dropped 0overruns 0frame 0
TX packets 1378035bytes 2166169069 (2.0 GiB)
TX errors 0dropped 0 overruns 0carrier 0collisions 0
flannel0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>mtu 1472
inet 10.1.8.0netmask 255.255.0.0destination 10.1.8.0
unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00txqueuelen 500(UNSPEC)
RX packets 6bytes 504 (504.0 B)
RX errors 0dropped 0overruns 0frame 0
TX packets 6bytes 504 (504.0 B)
TX errors 0dropped 0 overruns 0carrier 0collisions 0
另一个节点同样重复以上安装步骤。
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