feat: add different tags for testing rolling updates

.ci/build-container-and-validate-txt-response.sh

@@ -12,3 +12,8 @@ grep -q "^Hello! 👋$" out.txt
 grep -q "^UpCloudLtd / hello-container at not-a-co$" out.txt
 
 docker rm -f ${container_id}
+
+EMOJI=🦁 HELLO=Moo bash -xe ./.ci/build-index-files.sh
+
+grep -q "^Moo! 🦁$" out/index.txt
+grep -q "^UpCloudLtd / hello-container $" out/index.txt

.ci/build-index-files.sh

@@ -0,0 +1,14 @@
+#!/bin/sh -xe
+
+target=${1:-out}
+name=${NAME:-hello}
+
+rm -rf $target
+mkdir -p $target
+cp index.html index.txt SourceSans3.ttf $target
+
+sed -i "s/build_version_note/${VERSION_NOTE:0:11}/" $target/index.*
+sed -i "s/build_emoji/${EMOJI:-👋}/" $target/index.*
+sed -i "s/build_hello/${HELLO:-Hello}/" $target/index.*
+
+tar -czvf hello-$name.tar.gz -C $target .

.github/workflows/release.yaml

@@ -2,13 +2,28 @@ name: Release
 
 on:
   push:
-    branches:
-    - main
+    tags:
+    - "v*"
 
 jobs:
   build-and-push:
-    name: Build and push container image
+    name: Build and push container image (${{ matrix.args.name }})
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        args:
+        - emoji: 👋
+          hello: Hello
+          name: hello
+        - emoji: 🐅
+          hello: Roar
+          name: tiger
+        - emoji: 🐕
+          hello: Woof
+          name: dog
+        - emoji: 🐄
+          hello: Moo
+          name: cow
     steps:
     - name: Checkout
       uses: actions/checkout@v3
@@ -20,9 +35,49 @@ jobs:
         password: ${{ secrets.GITHUB_TOKEN }}
     - name: Build and push container image to GitHub Container Registry
       run: |
-        docker build . --tag hello-container --build-arg "VERSION_NOTE=at ${GITHUB_SHA}"
+        docker build . --tag hello-container \
+          --build-arg "VERSION_NOTE=at ${{ github.ref_name }}" \
+          --build-arg "EMOJI=${{ matrix.args.emoji }}" \
+          --build-arg "HELLO=${{ matrix.args.hello }}"
 
-        for tag in ${{ github.run_number }} latest; do
+        tags="${{ matrix.args.name }}-${{ github.ref_name }} ${{ matrix.args.name }}"
+        if [ "${{ matrix.args.name }}" = "hello" ]; then
+            tags="$tags latest"
+        fi
+
+        for tag in $tags; do
           docker tag hello-container ghcr.io/upcloudltd/hello:$tag
           docker push ghcr.io/upcloudltd/hello:$tag
         done
+    - name: Build archive
+      run: bash -xe ./.ci/build-index-files.sh
+      env:
+        VERSION_NOTE: "at ${{ github.ref_name }}"
+        EMOJI: "${{ matrix.args.emoji }}"
+        HELLO: "${{ matrix.args.hello }}"
+        NAME: "${{ matrix.args.name }}"
+    - name: Stash archive
+      uses: actions/upload-artifact@v3
+      with:
+        name: hello-${{ matrix.args.name }}
+        path: hello-${{ matrix.args.name }}.tar.gz
+  upload-files-to-release:
+    name: Upload build results to release
+    needs: build-and-push
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Unstash archive
+      uses: actions/download-artifact@v3
+      with:
+        path: release/
+    - name: Upload archive to release
+      uses: svenstaro/upload-release-action@v2
+      with:
+        file: release/*/hello-*.tar.gz
+        file_glob: true
+    - name: Upload nginx configuration to release
+      uses: svenstaro/upload-release-action@v2
+      with:
+        file: index.conf

.gitignore

@@ -0,0 +1,6 @@
+# Temporary test files
+out.txt
+
+# Build outputs
+hello-*.tar.gz
+out/

Dockerfile

@@ -1,10 +1,18 @@
-FROM nginx:stable-alpine
+FROM alpine:latest as build
 
 # Should be set to "at $COMMIT_SHA"
 ARG VERSION_NOTE=""
 
-COPY index.html index.txt SourceSans3.ttf /usr/share/nginx/html/
-RUN sed -i "s/docker_version_note/${VERSION_NOTE:0:11}/" /usr/share/nginx/html/index.*
+ARG EMOJI="👋"
+ARG HELLO="Hello"
+
+WORKDIR /work
+COPY .ci/build-index-files.sh index.* SourceSans3.ttf ./
+RUN ./build-index-files.sh
+
+FROM nginx:stable-alpine
 
 RUN rm /etc/nginx/conf.d/*
 COPY index.conf /etc/nginx/conf.d/
+
+COPY --from=build /work/out/* /usr/share/nginx/html/

README.md

@@ -1,6 +1,11 @@
 # hello-container
 
-Simple container for testing and demonstrating container and pod networking.
+Simple container for testing and demonstrating
+
+- container and pod networking, and
+- (rolling) deployment updates.
+
+The container runs an nginx server that (from the `/` root route) returns either HTML or TXT response with `Hello! 👋` message as well as containers hostname and address.
 
 ## Usage
 
@@ -25,8 +30,14 @@ Build `hello-container` image with:
 ```sh
 docker build . -t hello-container
 
-# Or with version note
+# With version note
 docker build . -t hello-container --build-arg "VERSION_NOTE=at $(git rev-parse HEAD)"
+
+# With custom emoji and greeting
+docker build . -t hello-container \
+  --build-arg "VERSION_NOTE=at $(git rev-parse HEAD)" \
+  --build-arg "EMOJI=🐄" \
+  --build-arg "HELLO=Moo"
 ```
 
 Run `hello-container` with:

index.html

@@ -1,9 +1,9 @@
 <html lang="en">
   <head>
-    <title>Hello!</title>
+    <title>build_hello!</title>
     <link
       rel="icon"
-      href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>👋</text></svg>"
+      href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>build_emoji</text></svg>"
     />
     <meta charset="UTF-8" />
     <style>
@@ -122,7 +122,7 @@
     </header>
     <main>
       <div class="content">
-        <h1>Hello! 👋</h1>
+        <h1>build_hello! build_emoji</h1>
         <table>
           <tbody>
             <tr>
@@ -143,7 +143,7 @@ <h1>Hello! 👋</h1>
         href="https://github.com/UpCloudLtd/hello-container.git"
         >UpCloudLtd / hello-container</a
       >
-      docker_version_note
+      build_version_note
     </footer>
   </body>
 </html>

index.txt

@@ -1,6 +1,6 @@
-Hello! 👋
+build_hello! build_emoji
 
 Hostname: nginx_hostname
 Address:  nginx_address
 
-UpCloudLtd / hello-container docker_version_note
+UpCloudLtd / hello-container build_version_note