lichess-org / lichess-org/fishnet

Add graceful shutdown to systemd unit

Open Beginner friendly
#260 5 comments 0 reactions 0 assignees View on GitHub

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Dominant language
Rust
Stars
934
Forks
115
Avg merge
2d 1h
Merged PRs (30d)
2

Description

It's a bit hacky to get around the lack of asynchronous stop commands. But I've got something like this to give a 5 minute window to the process to finish any remaining work.

```
[Service]
ExecStart=/home/fishnet/fishnet --auto-update --conf /home/fishnet/fishnet.ini run
ExecStop=/bin/kill -INT "$MAINPID"
ExecStop=/usr/bin/sh -c 'while kill -0 "$MAINPID" 2>/dev/null; do sleep 1; done'
KillMode=mixed
TimeoutStopSec=300
```

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.

Research direction

Locate the systemd unit for the fishnet service and review its current stop behavior. Compare it with the issue's ExecStop, KillMode, and TimeoutStopSec example; done means the service can receive SIGINT and wait up to five minutes for remaining work before stopping.

Written by the indexing model from the issue text.

Assessment

Tech stack
linux
Domain
infrastructure
Issue type
Feature
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
68/100

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