sinatraアプリをapprunnerで立ち上げるための実装

- 最低限のアプリケーションmyapp.rb追加
- Dockerfile追加
- github actionでECRにpush

Author: waterlow

.dockerignore

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+/.git/
+
+# Ignore bundler config.
+/.bundle

.github/workflows/main.yml

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+name: ecr push image
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  push:
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+      contents: read
+    steps:
+      - uses: actions/checkout@v3
+
+      # AWS 認証
+      - uses: aws-actions/configure-aws-credentials@v1
+        with:
+          aws-region: ap-northeast-1
+          role-to-assume: arn:aws:iam::765062437422:role/sinatra_app_runner_oidc_role
+
+      - uses: aws-actions/amazon-ecr-login@v1
+
+      - name: build and push docker image to ecr
+        env:
+          REGISTRY_URL: 765062437422.dkr.ecr.ap-northeast-1.amazonaws.com/sinatra_app_runner
+        run: |
+          docker build . --tag ${{ env.REGISTRY_URL }}
+          docker push ${{ env.REGISTRY_URL }}

Dockerfile

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+FROM ruby:3.2.2-slim as base
+
+WORKDIR /sinatra_app_runner
+
+FROM base as build
+
+RUN apt-get update -qq && \
+    apt-get install --no-install-recommends -y build-essential && \
+    gem install sinatra:3.0.6 puma:6.2.2 && \
+    rm -rf /usr/local/bundle/cache
+
+COPY . .
+
+FROM base
+
+RUN rm -rf /var/lib/apt/lists /var/cache/apt/archives
+
+COPY --from=build /usr/local/bundle /usr/local/bundle
+COPY --from=build /sinatra_app_runner /sinatra_app_runner
+
+EXPOSE 4567
+CMD ["ruby", "myapp.rb", "-o", "0.0.0.0"]

myapp.rb

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+# frozen_string_literal: true
+
+require 'sinatra'
+
+get '/' do
+  'hello world v3'
+end