The purpose of this repo is to build a "bare" linux container, for use with Coder. The image should be built using nix.

Coder.com is a WebIDE for enterprise, based on code-server. Coder providers several "packaged" images for different stacks - e.g. nodejs, goland, Jupyter etc.

The upstream documentation is not the best, with some contradictory information available.

See:

• Writing custom images
• Minimums
• Examples

1. Build image using buildLayeredImage using dockerTools

$ nix-build coder.nix -o image.tgz
these 3 derivations will be built:
 /nix/store/x4qzzjjj5djgkyaycvjv715wzrsncfy4-nix-shell-conf.json.drv
 /nix/store/3v0frirvln7fl218i84lbh0p3fi4w3a8-stream-nix-shell.drv
 /nix/store/ifrf633ss3lfjqlsjwn2hik5s7ba9haj-nix-shell.tar.gz.drv
building '/nix/store/x4qzzjjj5djgkyaycvjv715wzrsncfy4-nix-shell-conf.json.drv'...
{
 "architecture": "amd64",
 "config": {
[...]
Creating layer 100 with customisation...
Adding manifests...
Done.
/nix/store/anbpi6cs7rpry3k721q4mg3238ll93z1-nix-shell.tar.gz

2. Copy the image to a registry

$ skopeo --insecure-policy copy --dest-creds $CR_USER:$CR_PASS docker-archive:image.tgz docker://docker.io/acmck/nix-coder:0.0.1
Getting image source signatures
Copying blob fe9a5a345a02 done  
Copying blob 7bbfd6521109 done  
Copying blob 7c1f6edde326 done  
Copying blob 2faefbc8b956 done  
Copying blob e16e38ea2351 [==================================>---] 27.0MiB / 29.7MiB
Copying blob 685eb47c96a1 done
[]...]
Copying blob d6ee5dc9f6ff skipped: already exists  
Copying config 8720a993bf done  
Writing manifest to image destination
Storing signatures

3. Pull the tag, update coder workspace with new tag and try and start workspace.

Coder copies assets to the running container in Step 9. This seems to be successful, however, the workspace fails at a later step (step 11 - Failed to start networking agent).

The step appears to fail on using a tini runtime, found at /var/tmp/coder/init.

• Build layer images
• Make it work with coder
• Pipeline
• Copy the configure file to image (this is ran at runtime by coder)