Docker only starting in ipv6

[urbaman]

Hi,

I'm trying to deploy an on-prem omni instance (v1.3.4), but seem not to get it working in ipv4.

ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether bc:24:11:7f:cf:cc brd ff:ff:ff:ff:ff:ff
    altname enp0s18
    inet 10.0.100.60/24 brd 10.0.100.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::be24:11ff:fe7f:cfcc/64 scope link
       valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
    link/ether 92:60:4b:9c:4b:37 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
7: siderolink: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1280 qdisc fq_codel state UNKNOWN group default qlen 500
    link/none
    inet6 fdae:41e4:649b:9303::1/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::6f5b:c5f1:48e9:b59a/64 scope link stable-privacy
       valid_lft forever preferred_lft forever

... and I cannot at the moment manage ipv6 in my lan.

If I disable ipv6 on the docker host, the container doesn't even start with device errors.
Is there a way to switch the app to ipv4?

The env file already seems to point to ipv4 bindings:

## Binding
BIND_ADDR=0.0.0.0:443
MACHINE_API_BIND_ADDR=0.0.0.0:8090
K8S_PROXY_BIND_ADDR=0.0.0.0:8100

Thank you very much

[smira]

Omni uses IPv6 internally (for overlay network over the tunnels), so IPv6 shouldn't be disabled on the host.

Omni doesn't require you to have any IPv6 connectivity though.