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Unreliable DNS during Container Builds

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#101 13 comments 13 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
docker, github-actions, python
Domain
ci-cd, devops, networking

Research direction

Start by reproducing the two-step GitHub Actions workflow: connect to the private Tailscale network, then run the multi-stage Docker build that accesses the internal Python package index. Investigate when DNS lookups fail during the build; done means the package index resolves reliably throughout repeated builds.

Written by the indexing model from the issue text.

Description

I have a GitHub Actions pipeline that roughly process like so:

  1. Connect to a private Tailscale network using this Github Action.
  2. Start a docker build of a multi-stage Dockerfile where an internal python package index[1] is accessed to pull dependencies.

[1]: This package index is available within the Tailscale network and is discovered using DNS of an internal DNS server configured in Tailscale.

Step 2 occasionally fail due to DNS lookups for the package index failing, thus DNS resolving not working reliably.

Dominant language
TypeScript
Stars
938
Forks
137
No merged PRs in 30d

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

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