PostgreSQL repository no longer valid

[dvalfre]

The upstream PostgreSQL project has archived the packages for Ubuntu bionic, which is the base of Stack v6.
As such, this line prompts Chef to fail as the repository is no longer there: https://github.com/engineyard/ey-cookbooks-stable-v6/blob/next-release/cookbooks/postgresql/files/default/pgdg.list#L1.

In order to work around this issue, until a release is made, do use overlays to create a copy of the file where the offending line is removed, and upload it alongside your existing Chef recipes.

[dvalfre]

Actually, following PostgreSQL's recommendation, the new version of the file should contain:

deb https://apt-archive.postgresql.org/pub/repos/apt bionic-pgdg main
deb https://apt-archive.postgresql.org/pub/repos/apt bionic-pgdg-archive main

[dvalfre]

For a quick solution, do add the content of the PR as an overlay of the existing recipe.

[FernLP]

@dvalfre
https://support.engineyard.com/hc/en-us/articles/15416881367186 has been added to the KB
Please update or remove once this fix is live.