Compose: Question: Are docker-compose secrets supported on Windows Containers?

[JonJam]

Hi,

I am trying to get secrets working with a service using Docker for Windows with Windows Containers, my top level compose file (Can add overrides if necessary) below:

version: '3.1'

secrets:
web_connectionstring:
file: .\docker-secrets\web_connectionstring

services:
web:
image: jonjam/web:latest
secrets:
- web_connectionstring

When I build I get the following error:
Cannot create container for service web: invalid volume spec "/run/secrets/web_connectionstring": invalid volume specification: '\run\secrets\web_connectionstring'

Hence my question are secrets supported on Windows Containers? Or am I missing something.

[shin-]

It's still a work in progress on the engine's end: https://github.com/moby/moby/pull/32208

After that, there'll probably be more work needed for docker-compose to support it, so it might not come simultaneously (but if you deploy with docker stack deploy instead, it will be available)

cc @dnephin

[JonJam]

@shin- Thanks a lot for confirming this 👍.

I spent a lot of time today trying to work out what I was doing wrong. As Windows Containers become more mainstream, it might be good idea on docker documentation to state whether a feature is supported with Windows containers.

[caphrim007]

@shin- I think i am receiving the same error, but it looks (on my end) like the secrets are just not being translated to their unix-y paths.

here's a snippet from docker-compose config

secrets:
  clouds.yaml:
    file: C:\Users\tim\f5-ansible\devtools\secrets\clouds.yaml
....
    secrets:
    - source: cloudsyaml
      target: clouds.yaml
    volumes:
    - /c/Users/tim/f5-ansible:/here:rw
version: '3.3'

Note that the volumes are translated fine, just the secrets are not. This is with COMPOSE_CONVERT_WINDOWS_PATHS=1 set.

Am I seeing the same thing that @JonJam is seeing?

[mikeblakeuk]

Any news on this? @shin / @dnephin

[Scofield62]

I am also interested in this. I am facing with this issue on Docker Toolbox. :( It is just working fine on docker for windows (as linux containers)

[daaan]

Same issue here.

I spent a lot of time today trying to work out what I was doing wrong. As Windows Containers become more mainstream, it might be good idea on docker documentation to state whether a feature is supported with Windows containers.

@JonJam I would also like a (more useful) runtime notice if a feature is used that is not fully implmented yet. Or perhaps even better: don't release fully implemented features.

[EntityB]

@Scofield62 I didn't manage to make secrets work with docker-compose and Docker Toolbox. I think main problem is Docker Toolbox doesn't support docker-compose 3.1 well. And you need 3.1 (3.0 didn't support secrets). I suggest to you to buy Windows Pro on Ebay for 4$.

From what can I share with others:
Secrets works for me on Windows Pro with Docker 18.09.0, build 4d60db4and docker-compose version 1.23.2 BUT only if I cast docker-compose from cmd. From linux subsystem it doesn't work, also doesn't work from windows powershell, where I get error:

ERROR: for <service> Cannot start service <service>: error while creating mount source path '/host_mnt/c/.../.secrets/mysecret.json': mkdir /host_mnt/c: file exists

Once part with secret is removed from my docker-compose, it works everywhere.

[jpcmadeira]

@shin- I think i am receiving the same error, but it looks (on my end) like the secrets are just not being translated to their unix-y paths.

here's a snippet from docker-compose config

secrets:
  clouds.yaml:
    file: C:\Users\tim\f5-ansible\devtools\secrets\clouds.yaml
....
    secrets:
    - source: cloudsyaml
      target: clouds.yaml
    volumes:
    - /c/Users/tim/f5-ansible:/here:rw
version: '3.3'

Note that the volumes are translated fine, just the secrets are not. This is with COMPOSE_CONVERT_WINDOWS_PATHS=1 set.

Am I seeing the same thing that @JonJam is seeing?

I have a fix for the secrets path conversion. I still might have to use the env variable COMPOSE_CONVERT_WINDOWS_PATHS so compose doesn't convert paths when using windows containers but its working for linux containers, which was my problem.
Fix: #6595

[mara8008]

Is there any work around available that docker compose 3.5 secrets work with docker toolbox 19.03.1 on Windows 8?

I see the same issue as @JonJam mentioned.

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