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Add command to start MySQL on linux
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Authored by jon on May 4 2022, 12:55 AM.
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Details

Summary

Allow for the creation of a local MySQL instance by just running a unprivileged command.

Will do something similar for mac+launchd soon.

Depends on D3874

Test Plan

nix run .#mysql-up to bring up the server
journalctl -f --user-unit comm-mysql to view mysql logs
nix run .#mysql-down to bring the server down

Diff Detail

Repository
rCOMM Comm
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joringer/add-nix-clean (branched from master)
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Event Timeline

Harbormaster returned this revision to the author for changes because remote builds failed.May 4 2022, 12:58 AM
Harbormaster failed remote builds in B8747: Diff 12188!

Be more consistent about runtime unix socket path

Harbormaster returned this revision to the author for changes because remote builds failed.May 4 2022, 1:04 AM
Harbormaster failed remote builds in B8748: Diff 12189!

Rebase work to exclude grpc WIP commits

ashoat requested changes to this revision.May 4 2022, 11:15 AM

Interesting... I'm surprised these utilities don't exist upstream anywhere, since it feels like anybody with a dev environment that relies on MySQL will need them

nix/mysql-down-linux.nix
5–7 ↗(On Diff #12228)

Thanks for this comment, it's really helpful!

nix/mysql-up-linux.nix
20 ↗(On Diff #12228)

Are you intentionally using the port 3006 rather than the default 3306? (Assuming yes, but figured I'd check)

34 ↗(On Diff #12228)

I assume we're using bash-specific syntax below... does this need to be made explicit anyways?

42 ↗(On Diff #12228)

I think it's preferable to use [[ ]] over [ ]

This revision now requires changes to proceed.May 4 2022, 11:15 AM

Interesting... I'm surprised these utilities don't exist upstream anywhere, since it feels like anybody with a dev environment that relies on MySQL will need them

https://search.nixos.org/options?channel=21.11&from=0&size=50&sort=relevance&type=packages&query=mysql

They exist at the NixOS (e.g. machine/system) level, but they don't within Nixpkgs.

nix/mysql-up-linux.nix
20 ↗(On Diff #12228)

This I probably fat fingered, to be honest. I tested it using mysql but that uses the UNIX socket by default.

jon marked 4 inline comments as done.

Use 3306 default mysql port

Additional bash cleanup

nix/mysql-down-linux.nix
5–7 ↗(On Diff #12228)

:)

nix/mysql-up-linux.nix
34 ↗(On Diff #12228)

In practice, it will be bash, but I don't think I use any bashisms

42 ↗(On Diff #12228)

I believe [[ ]] could be less portable, but looks like zsh and ksh also support it

Add comm database and user creation logic

ashoat requested changes to this revision.May 6 2022, 11:45 AM
ashoat added inline comments.
nix/mysql-up-linux.nix
20 ↗(On Diff #12336)

Is --port 3306 even necessary since it's the default? (I don't feel strongly about this... happy to keep it here if you want to be explicit)

42 ↗(On Diff #12336)

Any reason we're not using [[ ]] here? (When somebody asks for changes on one line, you should always search for other cases of the same thing and apply the feedback everywhere)

67 ↗(On Diff #12336)

I was confused about this use of the double-single-quotes. I did some research and looks like it's a way of escaping the $ character. In case it's interesting to other reviewers, more details here

73 ↗(On Diff #12336)

Can we also run cd keyserver && yarn dist/scripts/create-db.js here to set up the tables?

(To do this we would need to save the DB credentials to keyserver/secrets/db_config.json, and would otherwise need the repo to be initialized with yarn cleaninstall && cd keyserver && yarn prod-build)

This revision now requires changes to proceed.May 6 2022, 11:45 AM
jon added inline comments.
nix/mysql-up-linux.nix
42 ↗(On Diff #12336)

looks like I missed this one, got the other 3

67 ↗(On Diff #12336)

Correct, if I want to fully escape a $ in a "lines" block, then I need to use ''$ to do so.

Although, in this case, it's kind of a noop, as nix only changes the behavior when you use the ${...} interpolation syntax.

73 ↗(On Diff #12336)

right now I'm just using the insecure initialization since it's a dev environment, which means user: root; pass: "". But I can run anything if needed, just transcribed what was in the dev env doc.

Address looked-over bracket

Before landing, can you create a Linear task for the MySQL initialization?

Some tips for the task creation:

  1. See "Guidelines for new Linear issues" here
  2. Probably should be a child of ENG-177
  3. Should be within the "Nix environment" project

Some stuff you might want to put in there:

  1. Secure initialization (what you talked about)
  2. Creation of MySQL user / database
  3. Population of keyserver/secrets/db_config.json config file
  4. Creation of tables by running yarn cleaninstall && cd keyserver && yarn prod-build && yarn script dist/scripts/create-db.js
This revision is now accepted and ready to land.May 11 2022, 6:14 PM
This revision was automatically updated to reflect the committed changes.

This should not have been landed without addressing my comment!! I left an explicit comment saying "Before landing, can you create a Linear task for the MySQL initialization?"

This calls into question if we can trust @jonringer-comm with an "accept with comments". @jonringer-comm, please keep this in mind going forward. Just because a diff is accepted, does NOT mean you can just land it. You ALWAYS need to check the comments and address any final requests BEFORE landing.

@varun, given @jonringer-comm is out for his honeymoon, can you handle the task creation detailed above?

Realizing now that ENG-1134/ENG-1135 may have been intended as those tasks, but I didn't realize it since they don't have all the details requested above and weren't linked from here. Please always link requested tasks before landing!