Docker inspect --format

General Discussions
1

I have container that is connected to few bridge networks and because of that it has more then 1 IPAddress:

# docker inspect --format '' elk | grep \"IPAddress
            "IPAddress": "172.17.0.2",
                    "IPAddress": "172.17.0.2",
                    "IPAddress": "172.19.0.4",
                    "IPAddress": "172.18.0.3",
                    "IPAddress": "172.20.0.2",
#

I’m trying to figure out how to use docker inspect --format to get IPAddress of specific network instead of just first IPAddress like I have so far:

# docker inspect --format '{{ .NetworkSettings.IPAddress }}' elk
172.17.0.2
#

Thanks in advance

2

you must look on bridge0

Bridge network driver | Docker Docs

3

I’m not looking customize bridge, all I need to be able to cherry pick IPAddress of specific network, say: ngnix_default:

# docker inspect elk | grep -A15 nginx_default
                "nginx_default": {
                    "IPAMConfig": {},
                    "Links": null,
                    "Aliases": [
                        "457165ff1c3e"
                    ],
                    "NetworkID": "5ca1ed563b448a9da008810828be663c4b9febf6c7b1ef6888ab308cb9d0b020",
                    "EndpointID": "4ba475c3361bdf9f2a13bb65d2a3b04046e4d81cc4371b921f9b39cbae962974",
                    "Gateway": "172.20.0.1",
                    "IPAddress": "172.20.0.2",
                    "IPPrefixLen": 16,
                    "IPv6Gateway": "",
                    "GlobalIPv6Address": "",
                    "GlobalIPv6PrefixLen": 0,
                    "MacAddress": "02:42:ac:14:00:02"
                }
# docker inspect elk | grep -A15 nginx_default | grep IPAddress
                    "IPAddress": "172.20.0.2",
#

as elk container is part of several networks:

# docker inspect elk | grep -c _default
3
#

I’m not sure how bridge customization is going to help me here, I’d rather learn how to use inspect.

Unless, I’m completely off, maybe you can provide an example?

Thanks again!

4

Ive quoted the article for bridge0 customization.

5

@alexus I bet you could do that using Go template range (https://golang.org/pkg/text/template/).

something like this

$ docker inspect -f '{{range $i, $n := .NetworkSettings.Networks}}{{$n.IPAddress}}{{end}}' <id>