# jimmidyson/configmap-reload

Simple binary to trigger a reload when a Kubernetes ConfigMap is updated

Repository: https://github.com/jimmidyson/configmap-reload
Canonical: https://ross.abutalabs.com/products/configmap-reload
Language: Go
License: Apache-2.0
License Family: permissive
Last push: 2026-08-24T01:04:33+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 3674, "days_push": 10, "days_rel": 511, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1083, forks 207 (observed 2026-08-28T04:03:31.264613+00:00)

## What it is
A small Go binary that watches Kubernetes ConfigMap and Secret volumes mounted into pods and triggers a reload when they change, currently by sending an HTTP webhook to the target process. It is typically deployed as a sidecar container and exposes Prometheus-style telemetry metrics on an HTTP endpoint.

## Use cases
- reload my app automatically when a kubernetes configmap changes
- watch a mounted configmap volume and call a webhook on update
- hot reload configuration in a kubernetes pod
- sidecar to reload nginx or prometheus config when configmap updates
- trigger service reload when kubernetes secret is updated
- monitor configmap changes in a pod and notify the process

## When to choose
- Your app in Kubernetes reads configuration from mounted ConfigMap or Secret volumes and cannot watch files itself
- You want a lightweight, single-purpose sidecar that POSTs to a reload endpoint whenever mounted config changes
- You need reload counts exposed as Prometheus metrics alongside the watching behavior

## When to avoid
- Your application already supports native config hot-reload or in-process file watching
- You need OS signal-based reloads such as SIGHUP, which is not yet supported
- You are not running workloads on Kubernetes with volume-mounted ConfigMaps or Secrets
- You need reload notifications via mechanisms other than an HTTP request

## Facets
- artifact type: cli-tool
- maturity: active
- function: configuration-management, webhook, monitoring
- domain: cloud-computing, monitoring
- platform: go, cloud
- tags: kubernetes-sidecar, configmap, config-reload, hot-reload, prometheus-metrics, webhook-trigger, kubernetes-secrets, volume-watcher, containers, devops, kubernetes, docker, linux

## Member repositories
- jimmidyson/configmap-reload (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:31.264613+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:51:11.085611+00:00, confidence not recorded.
  - readme: https://github.com/jimmidyson/configmap-reload (fetched 2026-08-28T04:03:31.264613+00:00, sha f82abeb75238)
- Data as of 2026-08-30T08:39:29.467469+00:00.