First version

.github/dependabot.yml

@@ -0,0 +1,9 @@
+---
+
+version: 2
+
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/deps.yml

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+---
+
+# https://github.com/actions/go-dependency-submission
+name: Dependency Submission
+on:
+  push:
+    branches:
+      - master
+
+permissions:
+  contents: write
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "stable"
+      - uses: actions/go-dependency-submission@v2
+        with:
+          go-mod-path: go.mod

.github/workflows/go-cross.yml

@@ -0,0 +1,55 @@
+---
+
+name: Go Matrix
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  cross:
+    name: Go
+    runs-on: ${{ matrix.os }}
+    env:
+      CGO_ENABLED: 0
+
+    strategy:
+      matrix:
+        go-version: [ "stable", "oldstable", "1.x" ]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+      - name: Set up Go ${{ matrix.go-version }}
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go-version }}
+          cache: false
+
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          # In order:
+          # * Module download cache
+          # * Build cache (Linux)
+          # * Build cache (Mac)
+          # * Build cache (Windows)
+          path: |
+            ~/go/pkg/mod
+            ~/.cache/go-build
+            ~/Library/Caches/go-build
+            %LocalAppData%\go-build
+          key: ${{ runner.os }}-${{ matrix.go-version }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-${{ matrix.go-version }}-go-
+
+      - name: Test
+        run: go test -v -cover ./...
+
+      - name: Build
+        run: go build -ldflags "-s -w" -trimpath ./...

.github/workflows/main.yml

@@ -0,0 +1,54 @@
+---
+
+name: Main
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+
+  main:
+    name: Main Process
+    runs-on: ubuntu-latest
+    env:
+      GO_VERSION: "stable"
+      GOLANGCI_LINT_VERSION: v2.2.1
+      CGO_ENABLED: 0
+
+    steps:
+      - name: Set up Go ${{ env.GO_VERSION }}
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ env.GO_VERSION }}
+          cache: false
+
+      - name: Check out code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Cache Go modules
+        uses: actions/cache@v4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Check and get dependencies
+        run: |
+          go mod tidy
+          git diff --exit-code go.mod
+          git diff --exit-code go.sum
+
+      - name: Install golangci-lint ${{ env.GOLANGCI_LINT_VERSION }}
+        run: |
+          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin ${GOLANGCI_LINT_VERSION}
+          golangci-lint --version
+
+      - name: Lint
+        run: golangci-lint run

.github/workflows/release.yml

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+---
+
+name: goreleaser
+
+on:
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+'
+  workflow_dispatch:
+
+jobs:
+  goreleaser:
+    name: Release ec_check
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: "stable"
+
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v6
+        with:
+          distribution: goreleaser
+          version: latest
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -0,0 +1,27 @@
+# === Go ===
+
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+ec_check
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+go.work.sum
+
+dist/

.golangci.yaml

@@ -0,0 +1,10 @@
+---
+
+version: "2"
+
+linters:
+  exclusions:
+    rules:
+      - linters:
+          - errcheck
+        source: cmd.Writer

.goreleaser.yml

@@ -0,0 +1,33 @@
+---
+
+before:
+  hooks:
+    - go mod tidy
+builds:
+  - main: .
+    binary: ec_check
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - windows
+      - darwin
+archives:
+  - name_template: >-
+      {{- .Binary }}_
+      {{- .Version }}_
+      {{- title .Os }}_
+      {{- if eq .Arch "amd64" }}x86_64
+      {{- else if eq .Arch "386" }}i386
+      {{- else }}{{ .Arch }}{{ end }}
+      {{- if .Arm }}v{{ .Arm }}{{ end -}}
+snapshot:
+  name_template: "{{ .Tag }}-next"
+changelog:
+  disable: true
+release:
+  github:
+    owner: SwissLife-OSS
+    name: ec_check
+gomod:
+  proxy: false

README.md

@@ -2,6 +2,48 @@
 
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 
+`ec_check` is a tool to check Elastic Cloud deployments.
+
+As of now, the main function is to evaluate, if downscaling of an Elasticsearch
+data tier within an Elastic Cloud deployment is possible based on the current
+disk usage.
+
+## Usage
+
+### Downscale Check
+
+By default, for downscaling, only strict vertical downscaling is proposed.
+
+By providing the extra flag `--recommend-zone-change`, `ec_check` will also
+propose a combination of changing the instance size and the number of used zones
+at the same time.  
+**CAUTION**: This mode is not recommended by Elastic. If you strictly require 3
+zones, this feature can not be used.
+
+```bash
+$ ec_check downscale --region <region> --profile <profile> --deployment <name> --username <username> --password <password>
+```
+
+By default, a headroom of 25% is required after downscaling for `ec_check` to
+propose downscaling of a data tier. This can be changed by flag: `--headroom-pct`
+and the respective percentage, e.g.: `--headroom-pct 27.5`
+
+### Elasticsearch Regions
+
+Get the supported list of regions:
+
+```bash
+$ ec_check regions
+```
+
+### Elasticsearch Profiles
+
+Get the supported list of hardware profiles for a given region:
+
+```bash
+$ ec_check profiles --region <region>
+```
+
 ## Community
 
 This project has adopted the code of conduct defined by the [Contributor Covenant](https://contributor-covenant.org/)