Kubernetes - pod 没有从法兰绒 CIDR 获取 IP

Question

我已经在worker节点上成功配置了法兰绒。当我在worker上执行< code>ifconfig时，我看到一个< code >法兰绒. 1界面(我使用的是vxlan)。还有< code>docker0和< code>cbr0接口。

但是，当pod启动时，该节点上的docker容器从< code>cbr0接口而不是从法兰绒接口获取IP地址。我确实尝试过手动删除cbr0接口，但是当docker容器在pod出现的节点上被调度时，它又出现了。

泊坞站是这样启动的：

< code > dockerd-bip = 10 . 200 . 50 . 1/24-MTU = 8951-iptables = false-IP-masq = false-host = UNIX:///var/run/docker . sock-log-level = error-storage-driver = overlay

法兰绒 env：

$ cat /run/flannel/subnet.env
FLANNEL_NETWORK=10.200.0.0/16
FLANNEL_SUBNET=10.200.50.1/24
FLANNEL_MTU=8951
FLANNEL_IPMASQ=false

如果配置 说：

$ ifconfig
cbr0      Link encap:Ethernet  HWaddr 0a:58:0a:c8:04:01
          inet addr:10.200.4.1  Bcast:0.0.0.0  Mask:255.255.255.0
          inet6 addr: fe80::d99:edff:fec6:9dd0/64 Scope:Link
          UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:536 (536.0 B)  TX bytes:648 (648.0 B)

docker0   Link encap:Ethernet  HWaddr 02:42:a4:4b:44:dc
          inet addr:10.200.50.1  Bcast:0.0.0.0  Mask:255.255.255.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth0      Link encap:Ethernet  HWaddr 12:e7:81:c3:1e:58
          inet addr:10.0.2.152  Bcast:10.0.2.255  Mask:255.255.255.0
          inet6 addr: fe90::10e8:86ff:fec3:1e58/54 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:9001  Metric:1
          RX packets:911006 errors:0 dropped:0 overruns:0 frame:0
          TX packets:821093 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:725362580 (725.3 MB)  TX bytes:155420170 (155.4 MB)

flannel.1 Link encap:Ethernet  HWaddr 12:10:54:76:3e:c4
          inet addr:10.200.50.0  Bcast:0.0.0.0  Mask:255.255.0.0
          inet6 addr: fe80::1410:54ff:fe86:3ec4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:8951  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:11 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:27 errors:0 dropped:0 overruns:0 frame:0
          TX packets:27 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:1624 (1.6 KB)  TX bytes:1624 (1.6 KB)

如何确保容器的 IP 地址源自法兰绒接口？

Answer 1

您可能需要检查您的kubernetes部署，以确保您没有使用任何网络插件，因为您使用的是flannel。

http://kubernetes.io/docs/admin/network-plugins/