[chore] Build docker image for PHP auto-intrumentation

.github/workflows/publish-autoinstrumentation-php.yaml

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+name: "Publish PHP Auto-Instrumentation"
+
+on:
+  push:
+    paths:
+      - 'autoinstrumentation/php/**'
+      - '.github/workflows/publish-autoinstrumentation-php.yaml'
+    branches:
+      - main
+  pull_request:
+    paths:
+      - 'autoinstrumentation/php/**'
+      - '.github/workflows/publish-autoinstrumentation-php.yaml'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  publish:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Read version
+        run: echo "VERSION=$(cat autoinstrumentation/php/version.txt)" >> $GITHUB_ENV
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            otel/autoinstrumentation-php
+            ghcr.io/open-telemetry/opentelemetry-operator/autoinstrumentation-php
+          tags: |
+            type=match,pattern=v(.*),group=1,value=v${{ env.VERSION }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Cache Docker layers
+        uses: actions/cache@v4
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+
+      - name: Log into Docker.io
+        uses: docker/login-action@v3
+        if: ${{ github.event_name == 'push' }}
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Login to GitHub Package Registry
+        uses: docker/login-action@v3
+        if: ${{ github.event_name == 'push' }}
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Prepare files for docker image
+        run: pushd ./autoinstrumentation/php ; ./prepare_files_for_docker_image.sh --ext-ver ${{ env.VERSION }} --dest-dir ${PWD}/files_for_docker_image ; popd
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: autoinstrumentation/php
+          push: ${{ github.event_name == 'push' }}
+          build-args: SUB_DIR_WITH_FILES_FOR_DOCKER_IMAGE=files_for_docker_image
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache

autoinstrumentation/php/Dockerfile

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+# To build one auto-instrumentation image for php, please:
+#  - Download your php auto-instrumentation artefacts to `/autoinstrumentation` directory. This is required as when instrumenting the pod,
+#    one init container will be created to copy the files to your app's container.
+#  - Grant the necessary access to the files in the `/autoinstrumentation` directory.
+#  - Following environment variables are injected to the application container to enable the auto-instrumentation.
+#       PHP_INI_SCAN_DIR=:/otel-auto-instrumentation-php/php_ini_scan_dir
+#       OTEL_PHP_AUTOLOAD_ENABLED=true
+#  - For auto-instrumentation by container injection, the Linux command cp is
+#    used and must be availabe in the image.
+
+FROM busybox
+
+ARG SUB_DIR_WITH_FILES_FOR_DOCKER_IMAGE
+
+COPY ${SUB_DIR_WITH_FILES_FOR_DOCKER_IMAGE} /autoinstrumentation/

autoinstrumentation/php/composer_PHP_8.1.json

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+{
+    "name": "open-telemetry/operator-autoinstrumentation-php",
+    "description": "OpenTelemetry PHP auto-instrumentation packages to include in the image used by OpenTelemetry Operator for Kubernetes",
+    "type": "project",
+    "require": {
+        "open-telemetry/exporter-otlp": "1.1.0",
+        "open-telemetry/opentelemetry-auto-guzzle": "1.0.1",
+        "open-telemetry/opentelemetry-auto-http-async": "1.0.1",
+        "open-telemetry/opentelemetry-auto-laravel": "1.0.1",
+        "open-telemetry/opentelemetry-auto-psr15": "1.0.6",
+        "open-telemetry/opentelemetry-auto-psr18": "1.0.4",
+        "open-telemetry/opentelemetry-auto-slim": "1.0.7",
+        "open-telemetry/opentelemetry-auto-symfony": "1.0.0beta30",
+        "open-telemetry/opentelemetry-auto-wordpress": "0.0.16",
+        "open-telemetry/sdk": "1.1.2",
+        "php-http/guzzle7-adapter": "1.0.0"
+    },
+    "provide": {
+        "psr/http-client": "*",
+        "psr/http-server-middleware": "*",
+        "laravel/framework": "*",
+        "slim/slim": "*",
+        "symfony/http-client-contracts": "*",
+        "symfony/http-kernel": "*"
+    },
+    "config": {
+        "process-timeout": 0,
+        "sort-packages": true,
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true,
+            "php-http/discovery": true
+        }
+    }
+}

autoinstrumentation/php/composer_PHP_8.2.json

@@ -0,0 +1,35 @@
+{
+    "name": "open-telemetry/operator-autoinstrumentation-php",
+    "description": "OpenTelemetry PHP auto-instrumentation packages to include in the image used by OpenTelemetry Operator for Kubernetes",
+    "type": "project",
+    "require": {
+        "open-telemetry/exporter-otlp": "1.1.0",
+        "open-telemetry/opentelemetry-auto-guzzle": "1.0.1",
+        "open-telemetry/opentelemetry-auto-http-async": "1.0.1",
+        "open-telemetry/opentelemetry-auto-laravel": "1.0.1",
+        "open-telemetry/opentelemetry-auto-pdo": "0.0.16",
+        "open-telemetry/opentelemetry-auto-psr15": "1.0.6",
+        "open-telemetry/opentelemetry-auto-psr18": "1.0.4",
+        "open-telemetry/opentelemetry-auto-slim": "1.0.7",
+        "open-telemetry/opentelemetry-auto-symfony": "1.0.0beta30",
+        "open-telemetry/opentelemetry-auto-wordpress": "0.0.16",
+        "open-telemetry/sdk": "1.1.2",
+        "php-http/guzzle7-adapter": "1.0.0"
+    },
+    "provide": {
+        "psr/http-client": "*",
+        "psr/http-server-middleware": "*",
+        "laravel/framework": "*",
+        "slim/slim": "*",
+        "symfony/http-client-contracts": "*",
+        "symfony/http-kernel": "*"
+    },
+    "config": {
+        "process-timeout": 0,
+        "sort-packages": true,
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true,
+            "php-http/discovery": true
+        }
+    }
+}

autoinstrumentation/php/prepare_files_for_docker_image.sh

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+#!/usr/bin/env bash
+set -xe -o pipefail
+
+PHP_versions=(8.1 8.2 8.3)
+libc_variants=(glibc musl)
+
+show_help() {
+    echo "Usage: $0 --ext-ver <opentelemetry extension version> --dest-dir <destination directory>"
+    echo
+    echo "Arguments:"
+    echo "    <opentelemetry extension version> - opentelemetry PHP extension version to use. This argument is mandatory."
+    echo "    <destination directory> - Directory to store files for docker image. All existing files in this directory will be deleted. This argument is mandatory."
+    echo
+    echo "Example:"
+    echo "  $0 ./files_for_docker_image"
+}
+
+parse_args() {
+    while [[ "$#" -gt 0 ]]; do
+        case $1 in
+            --ext-ver)
+                opentelemetry_extension_version="$2"
+                shift
+                ;;
+            --dest-dir)
+                destination_directory="$2"
+                shift
+                ;;
+            --help)
+                show_help
+                exit 0
+                ;;
+            *)
+                echo "Unknown parameter passed: $1"
+                show_help
+                exit 1
+                ;;
+        esac
+        shift
+    done
+
+    if [ -z "${opentelemetry_extension_version}" ] ; then
+        echo "<opentelemetry extension version> argument is missing"
+        show_help
+        exit 1
+    fi
+    if [ -z "${destination_directory}" ] ; then
+        echo "<destination directory> argument is missing"
+        show_help
+        exit 1
+    fi
+}
+
+ensure_dir_exists_and_empty() {
+    local dir_to_clean="${1:?}"
+
+    if [ -d "${dir_to_clean}" ]; then
+        rm -rf "${dir_to_clean}"
+        if [ -d "${dir_to_clean}" ]; then
+            echo "Directory ${dir_to_clean} still exists. Directory content:"
+            ls -l "${dir_to_clean}"
+            exit 1
+        fi
+    else
+        mkdir -p "${dir_to_clean}"        
+    fi
+}
+
+build_native_binaries_for_PHP_version_libc_variant() {
+    local PHP_version="${1:?}"
+    local libc_variant="${2:?}"
+    local dest_dir_for_current_args
+    dest_dir_for_current_args="${destination_directory}/native_binaries/PHP_${PHP_version}_${libc_variant}"
+
+    echo "Building extension binaries for PHP version: ${PHP_version} and libc variant: ${libc_variant} to ${dest_dir_for_current_args} ..."
+
+    ensure_dir_exists_and_empty "${dest_dir_for_current_args}"
+
+    local PHP_docker_image="php:${PHP_version}-cli"
+    local install_compiler_command=""
+    case "${libc_variant}" in
+        glibc)
+            ;;
+        musl)
+            PHP_docker_image="${PHP_docker_image}-alpine"
+            install_compiler_command="&& apk update && apk add autoconf build-base"
+            ;;
+        *)
+            echo "Unexpected libc variant: ${libc_variant}"
+            exit 1
+            ;;
+    esac
+
+    local current_user_id
+    current_user_id="$(id -u)"
+    local current_user_group_id
+    current_user_group_id="$(id -g)"
+    docker run --rm \
+        -v "${dest_dir_for_current_args}:/dest_dir" \
+        ${PHP_docker_image} sh -c "\
+        mkdir -p /app && cd /app \
+        ${install_compiler_command} \
+        && pecl install opentelemetry-${opentelemetry_extension_version} \
+        && cp /usr/local/lib/php/extensions/no-debug-non-zts-*/opentelemetry.so /dest_dir/ \
+        && chown -R ${current_user_id}:${current_user_group_id} /dest_dir/"
+
+    echo "Built extension binaries for PHP version: ${PHP_version} and libc variant: ${libc_variant}"
+}
+
+build_native_binaries() {
+    echo "Building extension binaries..."
+
+    for PHP_version in "${PHP_versions[@]}" ; do
+        for libc_variant in "${libc_variants[@]}" ; do
+            build_native_binaries_for_PHP_version_libc_variant "${PHP_version}" "${libc_variant}"
+        done
+    done
+
+    echo "Built extension binaries"
+}
+
+select_composer_json_for_PHP_version() {
+    local PHP_version="${1:?}"
+    case "${PHP_version}" in
+        8.0|8.1|8.2)
+            echo "composer_PHP_${PHP_version}.json"
+            ;;
+        8.3)
+            echo "composer_PHP_8.2.json"
+            ;;
+        *)
+            echo "Unexpected PHP version: ${PHP_version}"
+            exit 1
+            ;;
+    esac
+}
+
+download_PHP_packages_for_PHP_version() {
+    local PHP_version="${1:?}"
+    local dest_dir_for_current_args
+    dest_dir_for_current_args="${destination_directory}/PHP_packages/PHP_${PHP_version}"
+
+    echo "Downloading PHP packages for PHP version: ${PHP_version} to ${dest_dir_for_current_args} ..."
+
+    ensure_dir_exists_and_empty "${dest_dir_for_current_args}"
+    local composer_json_file_name
+    composer_json_file_name=$(select_composer_json_for_PHP_version "${PHP_version}")
+    local current_user_id
+    current_user_id="$(id -u)"
+    local current_user_group_id
+    current_user_group_id="$(id -g)"
+    docker run --rm \
+        -v "${dest_dir_for_current_args}:/app/vendor" \
+        -v "${PWD}/${composer_json_file_name}:/app/composer.json" \
+        -w /app \
+        php:${PHP_version}-cli sh -c "\
+        apt-get update && apt-get install -y unzip \
+        && curl -sS https://getcomposer.org/installer | php -- --filename=composer --install-dir=/usr/local/bin \
+        && composer --ignore-platform-req=ext-opentelemetry --no-dev install \
+        && chown -R ${current_user_id}:${current_user_group_id} ./vendor/"
+
+    echo "Downloaded PHP packages for PHP version: ${PHP_version} to ${dest_dir_for_current_args}"
+}
+
+download_PHP_packages() {
+    echo "Downloading PHP packages..."
+
+    for PHP_version in "${PHP_versions[@]}" ; do
+        download_PHP_packages_for_PHP_version "${PHP_version}"
+    done
+
+    echo "Downloaded PHP packages"
+}
+
+main() {
+    parse_args "$@"
+
+    echo "Preparing files for docker image into directory ${destination_directory} ..."
+
+    ensure_dir_exists_and_empty "${destination_directory}"
+    build_native_binaries
+    download_PHP_packages
+
+    echo "Prepared files for docker image into directory ${destination_directory}"
+}
+
+main "$@"

autoinstrumentation/php/version.txt

@@ -0,0 +1 @@
+1.1.0

versions.txt

@@ -32,6 +32,10 @@ autoinstrumentation-dotnet=1.2.0
 # Represents the current release of Go instrumentation.
 autoinstrumentation-go=v0.17.0-alpha
 
+# Represents the current release of PHP instrumentation.
+# Should match autoinstrumentation/php/version.txt
+autoinstrumentation-PHP=1.1.0
+
 # Represents the current release of Apache HTTPD instrumentation.
 # Should match autoinstrumentation/apache-httpd/version.txt
 autoinstrumentation-apache-httpd=1.0.4