Hacktoberfest 2026：メンテナが10月に向けて印を付けた、オープンで初心者向けの issue。 Hacktoberfest の issue を見る

Warn at startup when explicitly configured filesystem paths are unusable

オープン
  • 何か問題がありますか？
#3,832 コメント 0 件 リアクション 0 件 担当者 0 名 GitHub で見る

メンテナーはふだん 1 日以内に返信

@wangyusheng1985 がすでに取り組んでいます。

2026年9月30日 から。

  • #3833 @wangyusheng1985 による — オープン

評価

難易度
4/5
見積もり時間
3〜5日
初心者へのやさしさ
48/100
issue の種類
機能追加
明瞭さ
おおむね明確
活発さ
活発
技術スタック
go
領域
observability

調査の方向性

Start by locating startup handling for the --path.rootfs, --path.procfs, and --path.sysfs flags, then trace how explicitly configured paths are stored and accessed. Add lightweight warnings for configured paths that are missing, non-directories, or inaccessible while preserving startup, and verify that default paths and unusual environments retain their current behavior.

索引モデルが issue の本文から書いたものです。

説明

Containerized node_exporter deployments often depend on bind-mounted host filesystems together with flags such as:

--path.rootfs=/host
--path.procfs=/host/proc
--path.sysfs=/host/sys

A small mistake in those mounts can be harder to diagnose than it needs to be.

For example, if /host/proc is missing, mounted incorrectly, or not accessible inside the container, node_exporter can still start successfully. The problem then shows up later through collector errors, missing metrics, or values coming from the container namespace instead of the host.

That makes a simple deployment mistake look like a metrics or collector problem.

I think it would be useful to validate filesystem paths that were explicitly overridden and emit a warning at startup when one is clearly unusable.

The validation could stay intentionally lightweight:

  • path does not exist
  • path is not a directory
  • path cannot be accessed by the exporter

For procfs and sysfs, it may also be possible to cheaply detect paths that clearly do not point to the expected filesystem, as long as that doesn't introduce assumptions about files required by individual collectors.

I would keep this as a warning rather than a startup error. A partially working exporter can still be useful, and unusual environments shouldn't be rejected just because they don't look like a typical Linux host.

For example, starting with:

--path.procfs=/host/proc

when /host/proc is not actually mounted could produce a startup message along the lines of:

level=warn msg="Configured procfs path is not usable" path=/host/proc

The exporter could then continue with its current behavior.

I'd also limit the check to paths explicitly set by the user. That keeps the existing defaults untouched and makes the warning directly actionable: if someone configured a custom host path, they get an early indication that the path doesn't look usable.

The goal isn't to fully validate a host mount or predict every collector failure. It's just to catch obvious configuration mistakes at startup, before they turn into confusing scrape-time behavior.

主要言語
Go
スター
13.9k
フォーク
2.7k
平均マージ
2日 6時間
マージ済み PR（30日）
20

環境構築

はじめの一歩

  1. issue を最後まで読み、次にプロジェクトのコントリビューションガイドを読みます。
  2. 着手することを issue にコメントします — 二人が同じ作業をするのを防げます。
  3. リポジトリをフォークし、ブランチを切って変更します。
  4. issue 番号を参照したプルリクエストを送ります。

prometheus/node_exporter のほかの issue

prometheus/node_exporter の issue をすべて見る

似ている issue

Go の issue をもっと見る

新しい issue をメールで受け取る

初心者向けの GitHub issue を短くまとめたダイジェスト。