docker inspect missing link local ipv6

[agowa]

Description

docker inspect shows the following ipv6 settings:

        "NetworkSettings": {
            "Bridge": "",
            "HairpinMode": false,
            "LinkLocalIPv6Address": "",
            "LinkLocalIPv6PrefixLen": 0,
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "GlobalIPv6Address": "xxxx:xxxx:xxxx::6",
            "GlobalIPv6PrefixLen": 64,
            "IPv6Gateway": "xxxx:xxxx:xxxx::1",
            "Networks": {
                "bridge": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": null,
                    "IPv6Gateway": "xxxx:xxxx:xxxx::1",
                    "GlobalIPv6Address": "xxxx:xxxx:xxxx::6",
                    "GlobalIPv6PrefixLen": 64

But an ip addr within the container shows:

225: eth0@if226: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue state UP
    inet6 xxxx:xxxx:xxxx::6/64 scope global flags 02 
       valid_lft forever preferred_lft forever
    inet6 fe80::42:acff:fe11:6/64 scope link 
       valid_lft forever preferred_lft forever

Steps to reproduce the issue:

1. Enable docker IPv6 within the daemon.json
2. docker run -dt alpine:latest
3. docker inspect <<ID>>
4. docker exec -it <<ID>> ip addr

Describe the results you received:

"LinkLocalIPv6Address" and "LinkLocalIPv6PrefixLen" are not correctly shown within docker inspect

Describe the results you expected:

Both correctly set to the link local ipv6 of the container.

Output of docker version:

Client:
 Version:           18.09.1-ce
 API version:       1.39
 Go version:        go1.11.4
 Git commit:        4c52b901c6
 Built:             Thu Jan 10 06:51:04 2019
 OS/Arch:           linux/amd64
 Experimental:      false

Server:
 Engine:
  Version:          18.09.1-ce
  API version:      1.39 (minimum version 1.12)
  Go version:       go1.11.4
  Git commit:       4c52b901c6
  Built:            Thu Jan 10 06:50:46 2019
  OS/Arch:          linux/amd64
  Experimental:     false

Output of docker info:

Containers: 18
 Running: 15
 Paused: 0
 Stopped: 3
Images: 300
Server Version: 18.09.1-ce
Storage Driver: overlay2
 Backing Filesystem: extfs
 Supports d_type: true
 Native Overlay Diff: false
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: bridge host macvlan null overlay
 Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 9f2e07b1fc1342d1c48fe4d7bbb94cb6d1bf278b.m
runc version: 079817cc26ec5292ac375bb9f47f373d33574949
init version: fec3683
Security Options:
 seccomp
  Profile: default
Kernel Version: 4.20.0-arch1-1-ARCH
Operating System: Arch Linux
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 11.73GiB
ID: FG3Q:YYS2:3ZLA:FPA5:HCRF:HWLR:PZRR:7BM7:IXER:CVEQ:L6AQ:DAS5
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false

Additional environment details (AWS, VirtualBox, physical, etc.):
rented vServer

[agowa]

@GordonTheTurtle I think this is the wrong label, this is not a platform/arm, but x86_64, or does that tag mean something else?

[thaJeztah]

@agowa338 is the information present inside NetworkSettings.Networks.bridge ? The top-level (NetworkSettings.LinkLocalIPv6Address) field was deprecated in API versions v1.20 and up, and is only propagated on older API versions.

[agowa]

No, it is not. The node NetworkSettings.Network.bridge has no attribute LinkLocalIPv6Address. It only shows the GUA.

"bridge": {
                    "IPAMConfig": null,
                    "Links": null,
                    "Aliases": null,
                    "NetworkID": "(...)",
                    "EndpointID": "(...)",
                    "Gateway": "(...)",
                    "IPAddress": "(...)",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "xxxx:xxxx:xxxx::1",
                    "GlobalIPv6Address": "xxxx:xxxx:xxxx::6",
                    "GlobalIPv6PrefixLen": 64,
                    "MacAddress": "(...)",
                    "DriverOpts": null
                }