Can enable IPV6 for docker

[kenny114086]

I have enable IPV6 for unraid, and the network setting can get the IPV6 address.

 

 

 

But in docker setting I can't found "IPv6 custom network on interface br0 (optional)", only IPv4.

 

Please HELP!

 

 

[Squid]

@bonienl

[bonienl]

Can you show the output of

ip -6 addr

 

[kenny114086]

Hi Bonienl

 

Below is the output.

 

root@Tower:~# ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
9: eth0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 state UP qlen 1000
    inet6 fe80::d250:99ff:fe67:83c0/64 scope link
       valid_lft forever preferred_lft forever
10: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000
    inet6 2408:8256:5682:7a50:182f::2cd/128 scope global dynamic noprefixroute
       valid_lft 6794sec preferred_lft 6794sec
    inet6 fe80::d250:99ff:fe67:83c0/64 scope link
       valid_lft forever preferred_lft forever
15: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP
    inet6 fe80::42:63ff:fe15:ec76/64 scope link
       valid_lft forever preferred_lft forever
17: veth470a5d9@if16: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP
    inet6 fe80::dc65:4cff:fe8c:656c/64 scope link
       valid_lft forever preferred_lft forever
20: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UNKNOWN qlen 1000
    inet6 fe80::fc54:ff:fe93:4aa9/64 scope link
       valid_lft forever preferred_lft forever
22: vethd66e27e@if21: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP
    inet6 fe80::688a:ceff:feea:5a1a/64 scope link
       valid_lft forever preferred_lft forever
24: vethefd6d3f@if23: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP
    inet6 fe80::2072:84ff:fe5e:7266/64 scope link
       valid_lft forever preferred_lft forever
25: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UNKNOWN qlen 1000
    inet6 fe80::fc54:ff:fe0a:678e/64 scope link
       valid_lft forever preferred_lft forever
27: vetha296016@if26: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP
    inet6 fe80::3452:7bff:fead:180c/64 scope link
       valid_lft forever preferred_lft forever
28: vnet2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UNKNOWN qlen 1000
    inet6 fe80::fc54:ff:fea8:3584/64 scope link
       valid_lft forever preferred_lft forever
29: vnet3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UNKNOWN qlen 1000
    inet6 fe80::fc50:56ff:fe21:f209/64 scope link
       valid_lft forever preferred_lft forever
33: vethf578a38@if32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP
    inet6 fe80::f0f8:8fff:fed0:34d8/64 scope link
       valid_lft forever preferred_lft forever
35: veth7e6ff9c@if34: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP
    inet6 fe80::144e:3ff:fef5:ebfc/64 scope link
       valid_lft forever preferred_lft forever
38: vethf02d455@if37: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP
    inet6 fe80::5874:c1ff:fe9c:fd4b/64 scope link
       valid_lft forever preferred_lft forever
40: veth0f75ea4@if39: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP
    inet6 fe80::684e:c6ff:fe67:2de5/64 scope link
       valid_lft forever preferred_lft forever
 

[bonienl]

Thx. I need this one too

ip -6 route show dev br0

 

Edited August 5, 2021 by bonienl

[kenny114086]

Please check.

 

root@Tower:~# ip -6 route show dev br0
2408:8256:5682:7a50:1000::/68 proto ra metric 210 mtu 1480 pref medium
2408:8256:5682:830b:1000::/68 proto ra metric 210 mtu 1480 pref medium
fe80::/64 proto kernel metric 256 pref medium
multicast ff00::/8 proto kernel metric 256 pref medium
default via fe80::21b:21ff:fe36:cfe proto ra metric 210 mtu 1480 pref medium

[bonienl]

One more command to test

ip -6 route show dev br0 2408:8256:5682:7a50:182f::2cd/128

 

[kenny114086]

The ip6 address changed to 2408:8256:5682:830b:182f::2cd/128 after I rebooted the router, but no any output for both of these ip6 address.

 

root@Tower:~# ip -6 route show dev br0 2408:8256:5682:830b:182f::2cd/128
root@Tower:~# ip -6 route show dev br0 2408:8256:5682:7a50:182f::2cd/128
 

[bonienl]

Ok, this explains why you are not seeing the IPv6 option under Docker.

 

I need to make an adjustment in the detection logic, this will be in a future release.

 

[kenny114086]

I have a question why others can get the IPv6 for docker?

 

 

And will the adjustment release on 6.9.3?

[bonienl]

Usually address mask and route mask are equal, in your case these are different. The current detection logic doesn't take that into account.

 

A correction will come in version 6.10

 

[kenny114086]

Thanks, Bonienl