Επεξεργασία

Κοινή χρήση μέσω

How to deploy polyglot apps in the Azure Spring Apps Enterprise plan

  • Άρθρο

Note

The Basic, Standard, and Enterprise plans will be deprecated starting from mid-March, 2025, with a 3 year retirement period. We recommend transitioning to Azure Container Apps. For more information, see the Azure Spring Apps retirement announcement.

The Standard consumption and dedicated plan will be deprecated starting September 30, 2024, with a complete shutdown after six months. We recommend transitioning to Azure Container Apps. For more information, see Migrate Azure Spring Apps Standard consumption and dedicated plan to Azure Container Apps.

This article applies to: ❎ Basic/Standard ✅ Enterprise

This article shows you how to deploy polyglot apps in the Azure Spring Apps Enterprise plan, and how these polyglot apps can use the build service features provided by buildpacks.

Prerequisites

Deploy polyglot applications in a service instance

This section applies to building and deploying polyglot applications when the build service is enabled. If you disable the build service, you can deploy applications only with a custom container image. You can create your own image or use one built by an Azure Spring Apps Enterprise instance. For more information, see Deploy an application with a custom container image.

Manage builders

When you create an instance of Azure Spring Apps Enterprise, you must choose a default builder from one of the following supported language family buildpacks:

For more information, see Language Family Buildpacks for VMware Tanzu.

These buildpacks support building with source code or artifacts for Java, .NET Core, Go, web static files, Node.js, and Python apps. You can also see buildpack versions during creating or viewing a builder. And you can create a custom builder by specifying buildpacks and a stack.

All the builders configured in an Azure Spring Apps service instance are listed on the Build Service page, as shown in the following screenshot:

Screenshot of the Azure portal that shows the Build Service page with the Builders list highlighted.

Select Add to create a new builder. The following screenshot shows the resources you should use to create the custom builder. The OS Stack includes Bionic Base, Bionic Full, Jammy Tiny, Jammy Base, and Jammy Full. Bionic is based on Ubuntu 18.04 (Bionic Beaver) and Jammy is based on Ubuntu 22.04 (Jammy Jellyfish). For more information, see the OS stack recommendations section.

We recommend using Jammy OS Stack to create your builder because VMware is deprecating Bionic OS Stack.

Screenshot of the Azure portal that shows the Add Builder page with the OS Stack and selected buildpack name highlighted.

You can also edit a custom builder when the builder isn't used in a deployment. You can update the buildpacks or the OS Stack, but the builder name is read only.

Screenshot of the Azure portal that shows the Build Service page with the ellipsis button and Edit builder menu option highlighted.

The builder is a resource that continuously contributes to your deployments. It provides the latest runtime images and latest buildpacks.

You can't delete a builder when existing active deployments are being built with the builder. To delete a builder in this state, use the following steps:

  1. Save the configuration as a new builder.
  2. Deploy apps with the new builder. The deployments are linked to the new builder.
  3. Migrate the deployments under the previous builder to the new builder.
  4. Delete the original builder.

OS stack recommendations

In Azure Spring Apps, we recommend using Jammy OS Stack to create your builder because Bioinic OS Stack is in line for deprecation by VMware. The following list describes the options available:

  • Jammy Tiny: Suitable for building a minimal image for the smallest possible size and security footprint. Like building a Java Native Image, it can make the final container image smaller. The integrated libraries are limited. For example, you can't connect to an app instance for troubleshooting because there's no shell library.

    • Most Go apps.
    • Java apps. Some Apache Tomcat configuration options, such as setting bin/setenv.sh, aren't available because Tiny has no shell.

  • Jammy Base: Suitable for most apps without native extensions.

    • Java apps and .NET Core apps.
    • Go apps that require some C libraries.
    • Node.js, Python, or Web Servers apps without native extensions.

  • Jammy Full: Includes most libraries, and is suitable for apps with native extensions. For example, it includes a more complete library of fonts. If your app relies on the native extension, then use the Full stack.

    • Node.js or Python apps with native extensions.

For more information, see Ubuntu Stacks in the VMware documentation.

Manage the container registry

This section shows you how to manage the container registry used by the build service if you enable the build service with your own container registry. If you enable the build service with an Azure Spring Apps managed container registry, you can skip this section.

After you enable a user container registry with the build service, you can show and configure the registry using the Azure portal or the Azure CLI.

Use the following steps to show, add, edit, and delete the container registry:

  1. Open the Azure portal.

  2. Select Container registry in the navigation pane.

  3. Select Add to create a container registry.

    Screenshot of Azure portal that shows the Container registry page with Add container registry button.

  4. For a container registry, select the ellipsis (...) button, then select Edit to view the registry configuration.

    Screenshot of the Azure portal that shows the Container registry page.

  5. Review the values on the Edit container registry page.

    Screenshot of the Azure portal that shows the Container registry page with Edit container registry pane open.

  6. To delete a container registry, select the ellipsis (...) button, then select Delete to delete the registry. If the container registry is used by build service, it can't be deleted.

    Screenshot of Azure portal that shows the Container registry page with Edit container registry pane open and Username and Password boxes highlighted.

The build service can use a container registry, and can also change the associated container registry. This process is time consuming. When the change happens, all the builder and build resources under the build service rebuild, and then the final container images get pushed to the new container registry.

Use the following steps to switch the container registry associated with the build service:

  1. Open the Azure portal.

  2. Select Build Service in the navigation pane.

  3. Select Referenced container registry to update the container registry for the build service.

    Screenshot of the Azure portal that shows the Build Service page with referenced container registry highlighted.

Build and deploy polyglot applications

You can build and deploy polyglot applications in the following ways using the container registry:

  • For the build service using the Azure Spring Apps managed container registry, you can build an application to an image and then deploy it to the current Azure Spring Apps service instance. The build and deployment are executed together by using the az spring app deploy command.

  • For the build service using a user-managed container registry, you can build an application into a container image and then deploy the image to the current Azure Spring Apps Enterprise instance and other instances. The build and deploy commands are separate. You can use the build command to create or update a build, then use the deploy command to deploy the container image to the service instance.

For more information, see the Build service on demand section of Use Tanzu Build Service.

The following examples show some helpful build commands to use.

az configure --defaults group=<resource-group-name> spring=<service-name>

az spring build-service build list
az spring build-service build show --name <build-name>
az spring build-service build create --name <build-name> --artifact-path <artifact-path>
az spring build-service build update --name <build-name> --artifact-path <artifact-path>
az spring build-service build delete --name <build-name>

The following Azure CLI examples show building and deploying an artifact file for two container registry scenarios:

  • Azure Spring Apps managed container registry.
  • User-managed container registry.

This example builds and deploys in one command. The following command specifies a builder to build an application to a container image, and then deploys the application directly into the Azure Springs Apps Enterprise service instance.

If you don't specify the builder, a default builder is used.

az spring app deploy \
    --resource-group <resource-group-name> \
    --service <Azure-Spring-Apps-instance-name> \
    --name <app-name> \
    --builder <builder-name> \
    --artifact-path <path-to-your-JAR-file>

If you deploy the app with an artifact file, use --artifact-path to specify the file path. Both JAR and WAR files are acceptable.

If the Azure CLI detects the WAR package as a thin JAR, use --disable-validation to disable validation.

The following example deploys the source code folder to an active deployment by using the --source-path parameter to specify the folder.

az spring app deploy \
    --resource-group <resource-group-name> \
    --service <Azure-Spring-Apps-instance-name> \
    --name <app-name> \
    --builder <builder-name> \
    --source-path <path-to-source-code>

You can also configure the build environment to build the app. For example, in a Java application, you can specify the JDK version using the BP_JVM_VERSION build environment.

To specify build environments, use --build-env, as shown in the following example. The available build environment variables are described later in this article.

The following command deploys an application:

az spring app deploy \
    --resource-group <resource-group-name> \
    --service <Azure-Spring-Apps-instance-name> \
    --name <app-name> \
    --build-env <key1=value1> <key2=value2> \
    --builder <builder-name> \
    --artifact-path <path-to-your-JAR-file>

For each build, you can also specify the build resources, as shown in the following example.

The following command deploys an application:

az spring app deploy \
    --resource-group <resource-group-name> \
    --service <Azure-Spring-Apps-instance-name> \
    --name <app-name> \
    --build-env <key1=value1> <key2=value2> \
    --build-cpu <build-cpu-size> \
    --build-memory <build-memory-size> \
    --builder <builder-name> \
    --artifact-path <path-to-your-JAR-file>

The default build CPU/memory resource is 1 vCPU, 2 Gi. If your application needs a smaller or larger amount of memory, then use --build-memory to specify the memory resources - for example, 500Mi, 1Gi, 2Gi, and so on. If your application needs a smaller or larger amount of CPU resources, then use --build-cpu to specify the CPU resources - for example, 500m, 1, 2, and so on. The maximum CPU/memory resource limit for a build is 8 vCPU, 16Gi.

The CPU and memory resources are limited by the build service agent pool size. For more information, see the Build agent pool section of Use Tanzu Build Service. The sum of the processing build resource quota can't exceed the agent pool size.

The parallel number of build tasks depends on the agent pool size and each build resource. For example, if the build resource is the default 1 vCPU, 2 Gi and the agent pool size is 6 vCPU, 12 Gi, then the parallel build number is 6.

Other build tasks are blocked for a while because of resource quota limitations.

Your application must listen on port 8080. Spring Boot applications override the SERVER_PORT to use 8080 automatically.

Supported languages for deployments

The following table indicates the features supported for each language.

Feature Java Python Node .NET Core Go Static Files Java Native Image PHP
App lifecycle management ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Assign endpoint ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Azure Monitor ✅ ✅ ✅ ✅ ✅ ✅ ✅
Out of box APM integration ✅
Blue/green deployment ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Custom domain ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Scaling - auto scaling ✅ ✅ ✅ ✅ ✅ ✅ ✅
Scaling - manual scaling (in/out, up/down) ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Managed identity ✅ ✅ ✅ ✅ ✅ ✅ ️ ✅
API portal for VMware Tanzu ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Spring Cloud Gateway for VMware Tanzu ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Application Configuration Service for VMware Tanzu ✅ ✅
VMware Tanzu Service Registry ✅ ✅
App Live View for VMware Tanzu ✅ ✅
Virtual network ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Outgoing IP Address ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
E2E TLS ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Advanced troubleshooting - thread/heap/JFR dump ✅
Bring your own storage ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Integrate service binding with Resource Connector ✅ ✅
Availability Zone ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
App Lifecycle events ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Reduced app size - 0.5 vCPU and 512 MB ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Automate app deployments with Terraform and Azure Pipeline Task ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Soft Deletion ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Interactive diagnostic experience (AppLens-based) ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
SLA ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Customize health probes ✅ ✅ ✅ ✅ ✅ ✅ ✅ ✅
Web shell connect for troubleshooting ✅ ✅ ✅ ✅ ✅ ✅ ️ ✅ ✅
Remote debugging ✅ ️ ️ ️

For more information about the supported configurations for different language apps, see the corresponding section later in this article.

Java Native Image limitations

Native Image is a technology to compile Java code ahead of time to a native executable. Native images provide various advantages, like an instant startup and reduced memory consumption. You can package native images into a lightweight container image for faster and more efficient deployment. Because of the Closed World Optimization, the following limitations apply:

  • The following Java features require configuration at executable build time:
    • Dynamic Class Loading
    • Reflection
    • Dynamic Proxy
    • JNI (Java Native Interface)
    • Serialization
  • Bytecode isn't available at runtime anymore, so debugging and monitoring with tools targeted to the JVMTI isn't possible.

The following features aren't supported in Azure Spring Apps due to the limitation of Java Native Image. Azure Spring Apps will support them when the Java Native Image and the community overcomes the limitation.

Feature Why it isn't supported
Azure Monitor GraalVM built native images doesn't support JVM metrics.
Scaling – autoscaling GraalVM built native images doesn't support JVM metrics.
Out-of-box APM integration APM Vendor & Buildpack doesn't support native image.
Managed identity Azure SDKs doesn't support native image.
Advanced troubleshooting – thread/heap/JFR dump GraalVM built native images doesn't support thread/heap/JFR dump.
Remote debugging GraalVM Native Image doesn't support Remote Debugging.
Passwordless connection using Service Connector Azure Java SDK doesn't support native image.

Note

In the following different language build and deploy configuration sections, --build-env means the environment is used in the build phase. --env means the environment is used in the runtime phase.

We recommend that you specify the language version in case the default version changes. For example, use --build-env BP_JVM_VERSION=11.* to specify Java 11 as the JDK version. For other languages, you can get the environment variable name in the following descriptions for each language.

Deploy Java applications

The buildpack for deploying Java applications is tanzu-buildpacks/java-azure.

The following table lists the features supported in Azure Spring Apps:

Feature description Comment Environment variable Usage
Provides the Microsoft OpenJDK. Configures the JVM version. The default JDK version is 17. Currently supported: JDK 8, 11, 17, and 21. BP_JVM_VERSION --build-env BP_JVM_VERSION=11.*
Runtime env. Configures whether Java Native Memory Tracking (NMT) is enabled. The default value is true. Not supported in JDK 8. BPL_JAVA_NMT_ENABLED --env BPL_JAVA_NMT_ENABLED=true
Configures the level of detail for Java Native Memory Tracking (NMT) output. The default value is summary. Set to detail for detailed NMT output. BPL_JAVA_NMT_LEVEL --env BPL_JAVA_NMT_ENABLED=summary
Add CA certificates to the system trust store at build and runtime. See the Configure CA certificates for app builds and deployments section of How to configure APM integration and CA certificates. N/A N/A
Integrate with Application Insights, Dynatrace, Elastic, New Relic, App Dynamic APM agent. See How to configure APM integration and CA certificates. N/A N/A
Deploy WAR package with Apache Tomcat or TomEE. Set the application server to use. Set to tomcat to use Tomcat and tomee to use TomEE. The default value is tomcat. BP_JAVA_APP_SERVER --build-env BP_JAVA_APP_SERVER=tomee
Support Spring Boot applications. Indicates whether to contribute Spring Cloud Bindings support for the image at build time. The default value is false. BP_SPRING_CLOUD_BINDINGS_DISABLED --build-env BP_SPRING_CLOUD_BINDINGS_DISABLED=false
Indicates whether to autoconfigure Spring Boot environment properties from bindings at runtime. This feature requires Spring Cloud Bindings to have already been installed at build time or it does nothing. The default value is false. BPL_SPRING_CLOUD_BINDINGS_DISABLED --env BPL_SPRING_CLOUD_BINDINGS_DISABLED=false
Support building Maven-based applications from source. Used for a multi-module project. Indicates the module to find the application artifact in. Defaults to the root module (empty). BP_MAVEN_BUILT_MODULE --build-env BP_MAVEN_BUILT_MODULE=./gateway
Support building Gradle-based applications from source. Used for a multi-module project. Indicates the module to find the application artifact in. Defaults to the root module (empty). BP_GRADLE_BUILT_MODULE --build-env BP_GRADLE_BUILT_MODULE=./gateway
Enable configuration of labels on the created image. Configures both OCI-specified labels with short environment variable names and arbitrary labels using a space-delimited syntax in a single environment variable. BP_IMAGE_LABELS
BP_OCI_AUTHORS
See more environment variables here.		 --build-env BP_OCI_AUTHORS=<value>
Integrate JProfiler agent. Indicates whether to integrate JProfiler support. The default value is false. BP_JPROFILER_ENABLED build phase:
--build-env BP_JPROFILER_ENABLED=true
runtime phase:
--env BPL_JPROFILER_ENABLED=true
BPL_JPROFILER_PORT=<port> (optional, defaults to 8849)
BPL_JPROFILER_NOWAIT=true (optional. Indicates whether the JVM executes before JProfiler gets attached. The default value is true.)
Indicates whether to enable JProfiler support at runtime. The default value is false. BPL_JPROFILER_ENABLED --env BPL_JPROFILER_ENABLED=false
Indicates which port the JProfiler agent listens on. The default value is 8849. BPL_JPROFILER_PORT --env BPL_JPROFILER_PORT=8849
Indicates whether the JVM executes before JProfiler gets attached. The default value is true. BPL_JPROFILER_NOWAIT --env BPL_JPROFILER_NOWAIT=true
Integrate JRebel agent. The application should contain a rebel-remote.xml file. N/A N/A
AES encrypts an application at build time and then decrypts it at launch time. The AES key to use at build time. BP_EAR_KEY --build-env BP_EAR_KEY=<value>
The AES key to use at run time. BPL_EAR_KEY --env BPL_EAR_KEY=<value>
Integrate AspectJ Weaver agent. <APPLICATION_ROOT>/aop.xml exists and aspectj-weaver.*.jar exists. N/A N/A

Deploy .NET applications

The buildpack for deploying .NET applications is tanzu-buildpacks/dotnet-core.

The following table lists the features supported in Azure Spring Apps:

Feature description Comment Environment variable Usage
Configure the .NET Core runtime version. Supports Net6.0, and Net8.0.
You can configure through a runtimeconfig.json or MSBuild Project file.
The default runtime is 6.0.*.		 N/A N/A
Add CA certificates to the system trust store at build and runtime. See the Configure CA certificates for app builds and deployments section of How to configure APM integration and CA certificates. N/A N/A
Integrate with the Dynatrace and New Relic APM agents. See How to configure APM integration and CA certificates. N/A N/A
Enable configuration of labels on the created image. Configures both OCI-specified labels with short environment variable names and arbitrary labels using a space-delimited syntax in a single environment variable. BP_IMAGE_LABELS
BP_OCI_AUTHORS
See more environment variables here.		 --build-env BP_OCI_AUTHORS=<value>

Deploy Python applications

The buildpack for deploying Python applications is tanzu-buildpacks/python.

The following table lists the features supported in Azure Spring Apps:

Feature description Comment Environment variable Usage
Specify a Python version. Supports 3.8.*, 3.9.*, 3.10.*, 3.11.*, 3.12.*. The default value is 3.10.*
You can specify the version via the BP_CPYTHON_VERSION environment variable during build.		 BP_CPYTHON_VERSION --build-env BP_CPYTHON_VERSION=3.8.*
Add CA certificates to the system trust store at build and runtime. See the Configure CA certificates for app builds and deployments section of How to configure APM integration and CA certificates. N/A N/A
Enable configuration of labels on the created image. Configures both OCI-specified labels with short environment variable names and arbitrary labels using a space-delimited syntax in a single environment variable. BP_IMAGE_LABELS
BP_OCI_AUTHORS
See more environment variables here.		 --build-env BP_OCI_AUTHORS=<value>

Deploy Go applications

The buildpack for deploying Go applications is tanzu-buildpacks/go.

The following table lists the features supported in Azure Spring Apps:

Feature description Comment Environment variable Usage
Specify a Go version. Supports 1.21.*, 1.22.*. The default value is 1.21.*.
The Go version is automatically detected from the app’s go.mod file. You can override this version by setting the BP_GO_VERSION environment variable at build time.		 BP_GO_VERSION --build-env BP_GO_VERSION=1.22.*
Configure multiple targets. Specifies multiple targets for a Go build. BP_GO_TARGETS --build-env BP_GO_TARGETS=./some-target:./other-target
Add CA certificates to the system trust store at build and runtime. See the Configure CA certificates for app builds and deployments section of How to configure APM integration and CA certificates. N/A N/A
Integrate with Dynatrace APM agent. See How to configure APM integration and CA certificates. N/A N/A
Enable configuration of labels on the created image. Configures both OCI-specified labels with short environment variable names and arbitrary labels using a space-delimited syntax in a single environment variable. BP_IMAGE_LABELS
BP_OCI_AUTHORS
See more environment variables here.		 --build-env BP_OCI_AUTHORS=<value>

Deploy Node.js applications

The buildpack for deploying Node.js applications is tanzu-buildpacks/nodejs.

The following table lists the features supported in Azure Spring Apps:

Feature description Comment Environment variable Usage
Specify a Node version. Supports 16.*, 18.*, 19.*, 20.*. The default value is 20.*.
You can specify the Node version via an .nvmrc or .node-version file at the application directory root. BP_NODE_VERSION overrides the settings.		 BP_NODE_VERSION --build-env BP_NODE_VERSION=20.*
Add CA certificates to the system trust store at build and runtime. See the Configure CA certificates for app builds and deployments section of How to configure APM integration and CA certificates. N/A N/A
Integrate with Dynatrace, Elastic, New Relic, App Dynamic APM agent. See How to configure APM integration and CA certificates. N/A N/A
Enable configuration of labels on the created image. Configures both OCI-specified labels with short environment variable names and arbitrary labels using a space-delimited syntax in a single environment variable. BP_IMAGE_LABELS
BP_OCI_AUTHORS
See more environment variables here.		 --build-env BP_OCI_AUTHORS=<value>
Deploy an Angular application with Angular Live Development Server. Specify the host before running ng serve in the package.json: ng serve --host 0.0.0.0 --port 8080 --public-host <your application domain name>. The domain name of the application is available in the application Overview page, in the URL section. Remove the protocol https:// before proceeding. BP_NODE_RUN_SCRIPTS
NODE_ENV		 --build-env BP_NODE_RUN_SCRIPTS=build NODE_ENV=development

Deploy WebServer applications

The buildpack for deploying WebServer applications is tanzu-buildpacks/web-servers.

For more information, see Deploy web static files.

Deploy Java Native Image applications (preview)

The buildpack for deploying Java Native Image applications is tanzu-buildpacks/java-native-image.

You can deploy Spring Boot native image applications using the tanzu-buildpacks/java-native-image buildpack. Spring Native provides support for compiling Spring Boot applications into native executables. The buildpack uses Liberica Native Image Kit (NIK) to create native images of Spring Boot applications and these applications are fully supported.

When you build a Java Native Image, you must set the build environment BP_NATIVE_IMAGE to true and the build memory resource shouldn't be less than 8Gi. The build service agent pool size shouldn't be less than 4 vCPU, 8 Gi. For more information, see the Build agent pool section of Use Tanzu Build Service.

If you want to build the native image into a smaller size container image, then we recommend using a builder with the Jammy Tiny OS stack. For more information, see the OS stack recommendations section.

The following table lists the features supported in Azure Spring Apps:

Feature description Comment Environment variable Usage
Integrate with Bellsoft OpenJDK. Configures the JDK version. Currently supported: JDK 8, 11, 17, and 21. BP_JVM_VERSION --build-env BP_JVM_VERSION=17
Configure arguments for the native-image command. Arguments to pass directly to the native-image command. These arguments must be valid and correctly formed or the native-image command fails. BP_NATIVE_IMAGE_BUILD_ARGUMENTS --build-env BP_NATIVE_IMAGE_BUILD_ARGUMENTS="--no-fallback"
Add CA certificates to the system trust store at build and runtime. See How to configure APM integration and CA certificates. Not applicable. Not applicable.
Enable configuration of labels on the created image Configures both OCI-specified labels with short environment variable names and arbitrary labels using a space-delimited syntax in a single environment variable. BP_IMAGE_LABELS
BP_OCI_AUTHORS
See more environment variables here.		 --build-env BP_OCI_AUTHORS=<value>
Support building Maven-based applications from source. Used for a multi-module project. Indicates the module to find the application artifact in. Defaults to the root module (empty). BP_MAVEN_BUILT_MODULE --build-env BP_MAVEN_BUILT_MODULE=./gateway

There are some limitations for Java Native Image. For more information, see the Java Native Image limitations section.

Deploy PHP applications

The buildpack for deploying PHP applications is tanzu-buildpacks/php.

The Tanzu PHP buildpack is only compatible with the Full OS Stack. We recommend using a builder with the Jammy Full OS stack. For more information, see the OS stack recommendations section.

The following table lists the features supported in Azure Spring Apps:

Feature description Comment Environment variable Usage
Specify the PHP version. Configures the PHP version. Currently supported: PHP 8.1.*, 8.2.*, and 8.3.*. The default value is 8.1.* BP_PHP_VERSION --build-env BP_PHP_VERSION=8.1.*
Add CA certificates to the system trust store at build and runtime. See the Configure CA certificates for app builds and deployments section of How to configure APM integration and CA certificates. N/A N/A
Integrate with Dynatrace, New Relic, App Dynamic APM agent. See How to configure APM integration and CA certificates. N/A N/A
Select a Web Server. The setting options are php-server, httpd, and nginx. The default value is php-server. BP_PHP_SERVER --build-env BP_PHP_SERVER=httpd
Configure Web Directory. When the web server is HTTPD or NGINX, the web directory defaults to htdocs. When the web server is the PHP built-in server, the web directory defaults to /workspace. BP_PHP_WEB_DIR --build-env BP_PHP_WEB_DIR=htdocs

Next steps