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：

#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

编辑配置文件：

#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

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

另一个节点同样重复以上安装步骤。