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pod from different host can not communicate #834

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ylfforme opened this issue Oct 9, 2017 · 1 comment
Closed

pod from different host can not communicate #834

ylfforme opened this issue Oct 9, 2017 · 1 comment
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area/iptables

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@ylfforme
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ylfforme commented Oct 9, 2017

I started flanneld service and get a interface flannel.1 I set flannel network by etcd is {"network": "172.16.0.0/16", "subnetlen":24, "backend":{"type":"vxlan"}} but I use ifconfig to see the interfaces get flannel.1‘s netmask is netmask 255.255.255.255
I wonder why the netmask is not 255.255.255.0
I think beacuse of this my pod from different host can not communicate.
My flannel version is 0.7.1
@ylfforme
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ylfforme commented Oct 9, 2017

after I run this ：iptables -I -s 172.16.0.0/16 FORWARD -j ACCEPT，It work fine

tomdee added a commit to tomdee/flannel that referenced this issue Nov 11, 2017
@tomdee
network/iptables: Add iptables rules to FORWARD chain
3e3a5b4 
To work around the Docker change from v1.13 which
changed the default FORWARD policy to DROP.

The change has bitten many many users.

The troubleshooting documentation is also updated talk about the issue.

Replaces PR flannel-io#862
Fixes flannel-io#834
Fixes flannel-io#823
Fixes flannel-io#609
Fixes flannel-io#799
@tomdee tomdee mentioned this issue Nov 11, 2017
Merged
tomdee added a commit to tomdee/flannel that referenced this issue Nov 16, 2017
@tomdee
network/iptables: Add iptables rules to FORWARD chain
5df82dc 
To work around the Docker change from v1.13 which
changed the default FORWARD policy to DROP.

The change has bitten many many users.

The troubleshooting documentation is also updated talk about the issue.

Replaces PR flannel-io#862
Fixes flannel-io#834
Fixes flannel-io#823
Fixes flannel-io#609
Fixes flannel-io#799
willgorman pushed a commit to willgorman/flannel that referenced this issue Jun 19, 2019
@tomdee
network/iptables: Add iptables rules to FORWARD chain
30fdb55 
To work around the Docker change from v1.13 which
changed the default FORWARD policy to DROP.

The change has bitten many many users.

The troubleshooting documentation is also updated talk about the issue.

Replaces PR flannel-io#862
Fixes flannel-io#834
Fixes flannel-io#823
Fixes flannel-io#609
Fixes flannel-io#799
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@tomdee @ylfforme