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Signed-off-by: Zemtsov Vladimir <vl.zemtsov@gmail.com>
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‎.gitignore‎

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out/
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_gopath/
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vendor/
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.vendor
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manifest-tool
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.vscode/launch.json
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test/

‎Dockerfile‎

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FROM busybox
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USER 65534
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ARG BINARY=config-reloader
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COPY out/$BINARY /config-reloader
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ENTRYPOINT ["/config-reloader"]

‎LICENSE.txt‎

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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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‎Makefile‎

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# Copyright 2016 Red Hat, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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SHELL := /bin/bash -euo pipefail
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# Use the native vendor/ dependency system
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export GO111MODULE := on
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export CGO_ENABLED := 0
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ORG := github.com/vzemtsov
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REPOPATH ?= $(ORG)/config-reloader
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DOCKER_IMAGE_NAME ?= vlzemtsov/config-reloader
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DOCKER_IMAGE_TAG ?= develop
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BINARY=config-reloader
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LDFLAGS := -extldflags '-static'
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.PHONY: build
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build: clean
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CGO_ENABLED=0 go build -ldflags="$(LDFLAGS)" -o out/$(BINARY) cmd/app/main.go
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.PHONY: run
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run: build
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./out/$(BINARY)
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.PHONY: clean
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clean:
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rm -rf ./out
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.PHONY: docker
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docker: clean build
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docker build --build-arg BINARY=$(BINARY) -t $(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG) .
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.PHONY: tag
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tag:
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docker tag $(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG) $(DOCKER_IMAGE_NAME):$(TAG)
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.PHONY: push
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push:
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docker push $(DOCKER_IMAGE_NAME):$(TAG)

‎OWNERS‎

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owners:
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- vzemtsov

‎README.md‎

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<p align="center">
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<a href="https://github.com/vlzemtsov/config-reloader/">
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<img src="https://img.shields.io/badge/license-Apache%20v2-green.svg" alt="license">
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</a>
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</p>
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# Kubernetes Config (ConfigMap and Secret) Reloader
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This progect - based on https://github.com/jimmidyson/configmap-reload and https://github.com/prometheus-operator/prometheus-operator/pkgs/container/prometheus-config-reloader
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**config-reloader** is a simple binary to trigger a reload when Kubernetes ConfigMaps or Secrets are updated.
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It watches mounted volume dirs and notifies the target process changed files on dirs.
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If changes exist - send webhook.
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## Features
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- Send webook if files in dirs changed (if configmap or secret have been changed)
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- Control many dirs
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- Unarchive .gz archive to file and update file, if .gz has been changed
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- Init mode (stop after unarchive)
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- Prometheus metrics
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It is available as a Docker image at https://hub.docker.com/r/vlzemtsov/config-reloader
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### Usage
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```
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Usage of ./out/config-reloader:
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-volume-dir value
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the config map volume directory to watch for updates; may be used multiple times
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-web.listen-address string
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address to listen on for web interface and telemetry. (default ":9533")
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-web.telemetry-path string
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path under which to expose metrics. (default "/metrics")
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-webhook-method string
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the HTTP method url to use to send the webhook (default "POST")
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-webhook-status-code int
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the HTTP status code indicating successful triggering of reload (default 200)
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-webhook-url string
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the url to send a request to when the specified config map volume directory has been updated
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-webhook-retries integer
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the amount of times to retry the webhook reload request
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```

‎cmd/app/main.go‎

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package main
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import (
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"log"
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"github.com/vzemtsov/config-reloader/config"
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"github.com/vzemtsov/config-reloader/internal/app"
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"github.com/vzemtsov/config-reloader/pkg/metrics"
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)
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func main() {
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cfg, err := config.New()
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if err != nil {
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log.Fatalln(err)
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}
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err = app.Run(cfg)
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if err != nil {
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log.Fatalln(err)
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}
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if !*cfg.InitMode {
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err = metrics.Run()
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if err != nil {
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log.Fatalln(err)
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}
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}
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}

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