Nerdctl can't find .env file

[benjaminpreiss]

Rancher Desktop Version

0.7.1

Rancher Desktop K8s Version

1.22.5

What operating system are you using?

Other (specify below)

Operating System / Build Version

WSL2 debian on Windows 10 professional

What CPU architecture are you using?

x64

Windows User Only

No response

Actual Behavior

nerdctl compose can not find my .env file even though specifying it via the --env-file option

Steps to Reproduce

Create a basic docker-compose.yml e.g.

version: "3.9"
services:
  web:
    build: .
    ports:
      - "5000:5000"
  redis:
    image: "redis:alpine"

Create a .env file in the same directory. e.g.

# .env file
PROJECT_NAME=test_project

Run command nerdctl compose -f ./docker-compose.yml config --env-file ./.env

Result

I get an error "FATA[0000] Couldn't find env file: ./.env"

Expected Behavior

The config should be displayed according to the docker-compose.yml

Additional Information

No response

[ericpromislow]

Unfortunately, running rancher-desktop 1.0.0 I can't reproduce this issue, running the command from both the WSL and powershell sides. I'm closing this issue now, but if it's still a problem with the current version, and/or there are pertinent messages in the log files, please feel free to reopen it.

[benjaminpreiss]

@ericpromislow hmm, is there v1.0.0 out now for windows? The version I ran it from was 0.7.1

edit: I can see that it is in beta now. Will try. thanks!

[ericpromislow]

Great!

[benjaminpreiss]

Hey @ericpromislow. On my side, the problem still persists, even with the new version... :( I forgot to mention that I am using containerd and not moby...

[benjaminpreiss]

I think this issue is somehow related?

#1279

[benjaminpreiss]

I tried to run it with debug:

nerdctl compose -f ./docker-compose.yml up --build --env-file ./config-dev.env --debug

The only thing shown is:

DEBU[0000] found CNI isolation plugin
FATA[0000] Couldn't find env file: ./config-dev.env

[ericpromislow]

Hi, nerdctl brings up a problem trying to hit containerd.sock when running in moby mode.

This doesn't look exactly like #1279 unless there are some environment variables that nerdctl picks up that I don't know about. Are there?

When I run with --debug I also see

DEBU[0000] found CNI isolation plugin

but then it echoes the contents of the combined config file. This is with nerdctl version 0.16.0 on both macos and Ubuntu/WSL.

If I run the command from a different directory, I get the error message complaining about the missing .env file, even though there's no docker-compose.yml either -- it doesn't get to the point of trying to read that file.

Are you running the command in the same directory, or is this directory mounted at a point other than /mnt/c or /mnt/wsl` ?

[jandubois]

Hi, nerdctl brings up a problem trying to hit containerd.sock when running in moby mode.

@ericpromislow You cannot use nerdctl with moby, we do not support this.

@benjaminpreiss already confirmed that they are running with containerd though. Can you reproduce the problem in that configuration?

Since this is on Windows, it sounds like it is a problem with nerdctl-stub, which will have to translate the Windows path to a Linux path.

[ericpromislow]

I was running the command from the Ubuntu side. In Powershell running .... .\.env reproduces the issue. Running ... ./.env with a forward slash works fine. The .\docker-compose.yml part is resolved with either kind of slash.

[ericpromislow]

The --env-file ENVFILE part needs to appear before config.

It's not obvious from the nerdctl help:
``
$ nerdctl compose --help
Compose

Usage:
nerdctl compose [flags]
nerdctl compose [command]
Management commands:
Commands:
build Build or rebuild services
config Validate and view the Compose file
…
Flags:
--env-file string Specify an alternate environment file
-f, --f string Alias of --file
…

Those two usage lines are not too helpful if you want to specify both flags and a command. Let's see what docker says:

$ docker compose --help

Usage: docker compose [OPTIONS] COMMAND

Docker Compose

Options:
--ansi string Control when to print ANSI control characters ("never"|"always"|"auto") (default "auto")
--env-file string Specify an alternate environment file.
-f, --file stringArray Compose configuration files
...

So doing `nerdctl compose -f .\docker-compose.yml --env-file .\.env config` should work.

What's happening is that the windows stub stops processing paths when it hits the `config` directive, as it assumes that there are no more options afterwards. I'm not sure if this is a bug or by design, so leaving this open. But if you put `config` at the end, it should work.

[benjaminpreiss]

@ericpromislow You are absolutely right! It works now, when using --env-file in the right place... I was just so confused by the nerdctl docs, maybe I should request clarification on that there!

[ericpromislow]

It was also a bug on our side -- our code wasn't handling the path-type arguments correctly when they appeared to the right of the secondary command (in this case config). But the nerdctl docs should actually nail down the supported CLI syntax.

[ericpromislow]

Not merged yet.

[ericpromislow]

Closed in #1332