Compose: services.xxx.networks contains {"ExtNet": {"ipv4_address": "192.168.1.11"}}, which is an invalid type, it should be a string

[mathew-bulletin]

Envionment:

```docker-compose version
docker-compose version 1.11.2, build dfed245
docker-py version: 2.1.0
CPython version: 2.7.5
OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013

```uname -srvmpio
Linux 3.10.0-514.6.1.el7.x86_64 #1 SMP Wed Jan 18 13:06:36 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux```

Scenario:

version: '2.1'

services:
  xxx:
    image: xxx:latest
    networks:
      - ExtNet:
          ipv4_address: 192.168.1.11
      - IntNet

networks:
  ExtNet:
    driver: macvlan
    driver_opts:
      parent: enp3s0
    ipam:
      config:
        - gateway: 192.168.1.1
          ip_range: 192.168.1.10/28
          subnet: 192.168.1.0/24
  IntNet:
    internal: True
    driver: bridge
    ipam:
      config:
        - ip_range: 10.0.0.0/16
          subnet: 10.0.0.0/16

Error:

services.xxx.networks contains {"ExtNet": {"ipv4_address": "192.168.1.11"}}, which is an invalid type, it should be a string

# Tried docker compose yaml version 2.0, 2.1 and 3.0.

Expected:

• The ability to assign Static IP from ExtNet to xxx docker container in the above example.

[mathew-bulletin]

Update

• Adding ExtNet by itself to the container seems to be OK:

services:
  xxx:
    image: xxx:latest
    networks:
      - ExtNet:
          ipv4_address: 192.168.1.11

[mathew-bulletin]

It seems that if one of items in "services.xxx.networks" is a string (in this case, "IntNet"), it expects all of the items to be a string.
Would it be possible to change "services.xxx.networks" to expect tuple?

[shin-]

Actually, that second configuration is incorrect as well. networks is either a list of strings or a mapping (that's YAML's name for python's dict). https://docs.docker.com/compose/compose-file/compose-file-v2/#networks

For example, here's a valid format for your desired config:

services:
  xxx:
    image: xxx:latest
    networks:
      ExtNet:
        ipv4_address: 192.168.1.11
      IntNet: {}

[mathew-bulletin]

Cool that works. Thank you so much :)