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nixos/prometheus: Harden systemd service #162784

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merged 1 commit into from
Nov 7, 2022
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amarshall
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Motivation for this change

Services should be hardened when possible.

For reference:

I have omitted the Limit* as they do not appear to be commonly used in
NixOS, and, per man systemd.exec, are less preferred vs. cgroup
limits.

Things done
  • Built on platform(s)
    • x86_64-linux
    • aarch64-linux
    • x86_64-darwin
    • aarch64-darwin
  • For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
  • Tested, as applicable:
  • Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
  • Tested basic functionality of all binary files (usually in ./result/bin/)
  • 22.05 Release Notes (or backporting 21.11 Release notes)
    • (Package updates) Added a release notes entry if the change is major or breaking
    • (Module updates) Added a release notes entry if the change is significant
    • (Module addition) Added a release notes entry if adding a new NixOS module
    • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
  • Fits CONTRIBUTING.md.

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Tested on x84_64-linux without issues.

For reference:

- ./nixos/modules/services/monitoring/grafana.nix
- https://salsa.debian.org/go-team/packages/prometheus/-/blob/80192f1fe3e4b2b3a1816b4d2c4a628809acccbe/debian/service
- https://github.com/archlinux/svntogit-packages/blob/5894b9b77a63f8d1aad434e190217ba5f4ba40d4/trunk/prometheus.service

I have omitted the Limit* as they do not appear to be commonly used in
NixOS, and, per `man systemd.exec`, are less preferred vs. cgroup
limits.
@nixos-discourse
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This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/prs-ready-for-review/3032/1042

@winterqt
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@ofborg test prometheus

@amarshall
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@winterqt Hi! Thanks for kicking off the tests. In case you missed it, they all passed so wondering if there are any other blockers for this or if you have any other comments. Thanks!

@winterqt
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@amarshall I was waiting on the other reviewers, hopefully the activity will remind them 🙂

These changes do look good at a glance, though, so if nobody takes a look at it I will take a closer look.

@Ma27 Ma27 merged commit 58227c4 into NixOS:master Nov 7, 2022
@gkleen
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gkleen commented Nov 8, 2022

@amarshall, @Ma27 I'm having immediate issues with prometheus being killed for saying rlimit – had to remove ~@resources from SystemCallFilter.

@Ma27
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Ma27 commented Nov 8, 2022

Curious, when does it do that? But if that's causing issues, would you mind filing a PR? :)

@NickCao
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NickCao commented Nov 8, 2022

This is an issue with go 1.19: #197443

@Ma27
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Ma27 commented Nov 8, 2022

Meh... will file a PR for that.

Ma27 added a commit to Ma27/nixpkgs that referenced this pull request Nov 8, 2022
See the discussion below the original PR[1] and NixOS#197443 for more
context.

I guess I missed that upon review because the branch was too old and I
cherry-picked the commit onto my deployment branch which is based on
22.05. Sorry for that!

[1] NixOS#162784 (comment)
@amarshall amarshall deleted the prom-svc-harden branch November 15, 2022 14:37
rtimush pushed a commit to rtimush/nixpkgs that referenced this pull request Sep 21, 2023
See the discussion below the original PR[1] and NixOS#197443 for more
context.

I guess I missed that upon review because the branch was too old and I
cherry-picked the commit onto my deployment branch which is based on
22.05. Sorry for that!

[1] NixOS#162784 (comment)
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9 participants