initial commit

.devcontainer/Dockerfile

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+FROM maven:3-eclipse-temurin-21  AS dind
+
+ARG DEBIAN_FRONTEND=noninteractive
+ENV PIP_ROOT_USER_ACTION=ignore
+
+RUN set -eux && \
+    apt-get update && \
+    apt-get install -y --no-install-recommends \
+    sudo \
+    ca-certificates \
+    iptables \
+    net-tools \
+    openssl \
+    pigz \
+    xz-utils \
+    procps \
+    supervisor
+
+COPY --from=docker:27-dind /usr/local/bin /usr/local/bin
+COPY --from=docker:27-dind /usr/local/libexec/docker/cli-plugins /usr/local/libexec/docker/cli-plugins
+
+COPY entrypoint.sh /usr/local/bin
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+RUN update-alternatives --set iptables /usr/sbin/iptables-legacy
+RUN update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
+
+VOLUME /var/lib/docker
+
+RUN apt-get update && \
+    apt-get install --yes --no-install-recommends \
+    sudo \
+    bash \
+    curl \
+    build-essential \
+    python3.12 \
+    python-is-python3 \
+    python3-dev \
+    python3-pip \
+    python3-setuptools \
+    python3-wheel \
+    python3-psutil && \
+    apt clean && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN rm -rf /usr/lib/python3*/EXTERNALLY-MANAGED
+
+COPY requirements.txt /usr/local/src/requirements.txt
+
+RUN pip install -r /usr/local/src/requirements.txt
+
+WORKDIR /workspace
+
+EXPOSE 5000
+
+ENTRYPOINT [ "entrypoint.sh" ]

.devcontainer/devcontainer.json

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+{
+	"name": "otel-getting-started",
+	"workspaceFolder": "/workspaces/LFS148-code/exercises",
+	"image": "ghcr.io/lftraining/lfs148-code-application:latest",
+	"overrideCommand": false,
+	"runArgs": [
+		"--privileged"
+	],
+	"forwardPorts": [
+		5000,
+		5001,
+		5432,
+		8080,
+		8090,
+		9090,
+		16686
+	],
+	"containerEnv": {
+		"SHELL": "/bin/bash",
+		"EXERCISES": "/workspaces/opentelemetry-training/exercises"
+	},
+	"portsAttributes": {
+		"5000": {
+			"label": "Python Flask app"
+		},
+		"5001": {
+			"label": "Python Flask app"
+		},
+		"8080": {
+			"label": "Spring Boot Backend app"
+		},
+		"8090": {
+			"label": "Spring Boot Thymeleaf app"
+		},
+		"9090": {
+			"label": "Prometheus UI"
+		},
+		"16686": {
+			"label": "Jaeger UI"
+		},
+		"5432": {
+			"label": "Postgres DB"
+		}
+	},
+	"customizations": {
+		"vscode": {
+			"settings": {
+				"files.autoSave": "afterDelay",
+				"[python]": {
+					"editor.formatOnSave": true
+				},
+				"[dockercompose][yaml]": {
+					"editor.defaultFormatter": "redhat.vscode-yaml",
+					"editor.formatOnPaste": true,
+					"editor.formatOnSave": true,
+					"editor.insertSpaces": true,
+					"editor.tabSize": 2
+				},
+				"[adoc][markdown]": {
+					"editor.defaultFormatter": "vscode.markdown-language-features",
+					"editor.formatOnPaste": true,
+					"editor.formatOnSave": true,
+					"editor.insertSpaces": true,
+					"editor.tabSize": 2
+				},
+				"[dockerfile]": {
+					"editor.quickSuggestions": {
+						"strings": true
+					},
+					"editor.defaultFormatter": "ms-azuretools.vscode-docker"
+				},
+				"python.analysis.typeCheckingMode": "strict",
+				"python.analysis.autoImportCompletions": true
+			},
+			"extensions": [
+				"vscjava.vscode-java-pack",
+				"vscjava.vscode-java-dependency",
+				"ms-python.vscode-pylance",
+				"charliermarsh.ruff",
+				"ms-python.isort",
+				"ms-python.python",
+				"njpwerner.autodocstring",
+				"KevinRose.vsc-python-indent",
+				"ms-python.black-formatter",
+				"usernamehw.errorlens",
+				"redhat.vscode-yaml",
+				"ms-azuretools.vscode-docker"
+			]
+		}
+	}
+}

.devcontainer/entrypoint.sh

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+#!/bin/bash
+
+# Execute specified command
+"$@"
+
+/usr/bin/supervisord -n >> /dev/null 2>&1 &
+nohup dockerd >/dev/null 2>&1

.devcontainer/requirements.txt

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+Faker==28.4.1
+Flask==3.0.3
+opentelemetry-api==1.26.0
+opentelemetry-distro==0.47b0
+opentelemetry-exporter-otlp==1.26.0
+opentelemetry-exporter-otlp-proto-http==1.26.0
+opentelemetry-exporter-otlp-proto-grpc==1.26.0
+opentelemetry-exporter-prometheus==0.47b0
+opentelemetry-instrumentation-asyncio==0.47b0
+opentelemetry-instrumentation-dbapi==0.47b0
+opentelemetry-instrumentation-flask==0.47b0
+opentelemetry-instrumentation-grpc==0.47b0
+opentelemetry-instrumentation-jinja2==0.47b0
+opentelemetry-instrumentation-logging==0.47b0
+opentelemetry-instrumentation-sqlite3==0.47b0
+opentelemetry-instrumentation-threading==0.47b0
+opentelemetry-instrumentation-requests==0.47b0
+opentelemetry-instrumentation-system-metrics==0.47b0
+opentelemetry-instrumentation-urllib==0.47b0
+opentelemetry-instrumentation-wsgi==0.47b0
+opentelemetry-sdk==1.26.0
+opentelemetry-semantic-conventions==0.47b0
+requests==2.32.3

.github/workflows/docker-build-and-push.yml

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+name: Create and publish a Docker image
+
+on:
+  push:
+    branches: ["**"] # run for any commit or tag push on any branch
+    tags-ignore: ["v**"] # reserve v* tags for releases
+
+env:
+  REGISTRY_IMAGE: ghcr.io/lftraining/lfs148-code
+
+jobs:
+  build:
+    name: Build and publish docker image for ${{ matrix.image }} on ${{ matrix.platform }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        image:
+          - application
+        platform:
+          - linux/amd64
+          - linux/arm64
+        include:
+          - image: application
+            dockerfile: .devcontainer/Dockerfile
+            context: .devcontainer/
+          - platform: linux/arm64
+            os: [ubuntu-latest]
+          - platform: linux/amd64
+            os: [ubuntu-latest]
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Prepare for ${{ matrix.image }} on ${{ matrix.platform }}
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+
+      - name: Extract metadata (tags, labels) for Docker from ${{ matrix.image }}
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}-${{ matrix.image }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=tag
+            type=ref,event=pr
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push by digest for ${{ matrix.image }}
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: ${{ matrix.context }}
+          file: ${{ matrix.dockerfile }}
+          platforms: ${{ matrix.platform }}
+          labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,name=${{ env.REGISTRY_IMAGE }}-${{ matrix.image }},push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=gha,scope=build-${{ env.PLATFORM_PAIR }}
+          cache-to: type=gha,scope=build-${{ env.PLATFORM_PAIR }}
+
+      - name: Export digest for ${{ matrix.image }} on ${{ matrix.platform }}
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ matrix.image }}-${{ env.PLATFORM_PAIR }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs:
+      - build
+    strategy:
+      fail-fast: false
+      matrix:
+        image:
+          - application
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-${{ matrix.image }}*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}-${{ matrix.image }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=tag
+            type=ref,event=pr
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.REGISTRY_IMAGE }}-${{ matrix.image }}@sha256:%s ' *)
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}-${{ matrix.image }}:${{ steps.meta.outputs.version }}

.gitignore

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+**/__pycache__
+**/.DS_STORE
+
+*.jar
+
+settings.json

.gitpod.yml

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+# Image of workspace. Learn more: https://www.gitpod.io/docs/configure/workspaces/workspace-image
+image: maeddes/gitpod:full
+workspaceLocation: "/workspace/opentelemetry-training/exercises"
+
+tasks:
+  - name: Set environment variable
+    command: eval $(gp env -e EXERCISES=/workspace/opentelemetry-training/exercises)
+  - name: Add Python Otel libs
+    command: pip3 install requests flask Faker opentelemetry-api opentelemetry-sdk opentelemetry-exporter-prometheus opentelemetry-exporter-otlp