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Docker Storage Leak Detector
Build a lightweight web UI or agent that shows exactly why Docker disk usage is growing across images, build cache, logs, writable layers, and volumes. The value is proactive prevention: users get attribution, alerts, and one-click safe cleanup before services fail.
Why this matters
You run a handful of containers that seem healthy at first, then weeks later your disk usage spikes and everything starts feeling fragile. The frustrating part is not just reclaiming space; it is figuring out whether the real culprit is retained image layers, build cache, oversized logs, or a service quietly writing data to the wrong place. Existing commands can show fragments of the picture, but they assume you already know what to inspect. A purpose-built tool would help you see which workload is expanding, why it is happening, and what action is safe before you break a working setup.
- · Built for Individual self-hosters, homelab operators, and small DevOps teams who run multiple containers and repeatedly hit disk growth issues without clear root cause visibility..
- · Most likely monetization: Freemium SaaS subscription.
The Pain · Narrative
You run a handful of containers that seem healthy at first, then weeks later your disk usage spikes and everything starts feeling fragile. The frustrating part is not just reclaiming space; it is figuring out whether the real culprit is retained image layers, build cache, oversized logs, or a service quietly writing data to the wrong place. Existing commands can show fragments of the picture, but they assume you already know what to inspect. A purpose-built tool would help you see which workload is expanding, why it is happening, and what action is safe before you break a working setup.
Score Breakdown
Market Signal
Go-to-Market
Linux-based self-hosters running 5 to 30 Docker containers for media, backups, surveillance, or document management.
~100K-300K active globally
SEO long-tail
$9/month
25 activated users and 10 paying conversions from storage-related search traffic within 30 days
MVP Scope · 1–2 weeks
- Build a local agent that reads Docker disk usage, images, volumes, and container metadata through the Docker API
- Add a parser that classifies usage into images, build cache, logs, writable layers, and volumes
- Create a simple web dashboard showing top contributors by size
- Implement a read-only scan for likely misconfigured paths and missing bind mounts
- Ship a manual refresh workflow with JSON export for early testers
- Add historical snapshots and a basic growth chart per container
- Implement cleanup recommendations with dry-run explanations
- Add alerts for disk thresholds and abnormal weekly growth
- Create one-click commands users can copy for safe prune and log-limit actions
- Launch a landing page targeting Docker disk growth and cache cleanup searches
Differentiation
Why This Might Fail
Self-rebuttal — the most important trust signal
- 1The audience may be too comfortable with free command-line workflows once they learn the basics, limiting conversion beyond initial curiosity.
- 2General container managers could add enough storage visibility to reduce the need for a standalone product before it reaches scale.
- 3If the tool ever recommends a cleanup that causes data loss, trust could collapse quickly in a risk-sensitive infrastructure market.
Evidence Summary
How AI synthesized this insight — no verbatim quotes
The discussion strongly clusters around unexplained disk growth, with many comments pointing to hidden cache, logs, stale images, and data written inside containers. Several participants recommended cleanup commands, but they did so as piecemeal fixes rather than a full explanation. Multiple users also described ongoing ballooning over time, indicating a recurring problem rather than a one-off setup mistake.
Action Plan
Validate this opportunity before writing code
Recommended Next Step
Build
Strong demand signals detected. Real pain, real willingness to pay — start building an MVP.
Landing Page Copy Kit
Ready-to-paste copy based on real Reddit community language — no editing required
Headline
Docker Storage Leak Detector
Sub-headline
Build a lightweight web UI or agent that shows exactly why Docker disk usage is growing across images, build cache, logs, writable layers, and volumes. The value is proactive prevention: users get attribution, alerts, and one-click safe cleanup before services fail.
Who It's For
For Individual self-hosters, homelab operators, and small DevOps teams who run multiple containers and repeatedly hit disk growth issues without clear root cause visibility.
Feature List
✓ Per-container and per-category disk usage attribution ✓ Growth timeline with anomaly detection and projected exhaustion date ✓ One-click safe cleanup recommendations with dry-run mode ✓ Alerts for log bloat, unmounted data paths, and hidden build cache
Where to Validate
Share your landing page in r/r/selfhosted — that's exactly where these pain points were discovered.
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