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Build and Publish Add-on Products on SAP BTP, ABAP Environment

Current limitations

gCTS-related restrictions apply, please refer to gCTS: restrictions in supported object types

Required project "Piper" library version

SAP BTP ABAP environment releases might require certain versions of the project "Piper" Library. More Information can be found in SAP Note 3032800.

Introduction

This scenario describes how an add-on for the SAP BTP, ABAP environment is built. It is intended for SAP partners who want to provide a Software as a Service (SaaS) solution on the SAP BTP using the ABAP Environment. Therefore, a partner development contract (see SAP PartnerEdge Test, Demo & Development Price List) is required. This page aims to provide an overview of the build process of the add-on.

The development on SAP BTP, ABAP environment systems is done within “software components” (also called: “repositories”). The add-ons being built in this scenario are made up by one or multiple software components combined to an add-on product. The “ABAP environment pipeline” can be used to build and publish the add-on product. Please read on for more details about the Add-on Product and the build process.

Of course, this tackles only the upstream part of the SaaS solution lifecycle. Once the add-on is published, it can be consumed as a multitenant application in ABAP environment.

A comprehensive guidance on how to develop and operate SaaS applications using add-ons, can be found here.

The Add-on Product

The installation and maintenance of ABAP software is done / controlled via add-on product versions. An add-on product version is a „bundle" of software component versions made available at the same time for implementing a well-defined scope of functionality. It is the technical / delivery view on a software portfolio.

Add-on Product Version

An add-on product version is defined by a name and a version string. The name of an add-on product is a string with a maximum of 30 characters and consists of the namespace and a freely chooseble part - /NAMESPC/PRODUCTX. The add-on product name should only include uppercase characters.

The version string consists of three numbers separated by a dot - 1.2.0. The numbers in the version string have a hierarchic relationship:

  • The first number denotes the release. Release deliveries contain the complete scope of functionality. It is possible to change the software component version bundle in a new release.
  • The second number denotes the support package stack level. A support package stack consists of support package deliveries of the contained software component versions.
  • The third number denotes the patch level. A Patch delivery contains patch deliveries of the contained software component versions.

Software Component Version

Development on SAP BTP, ABAP environment

As you may know, the development in the SAP BTP, ABAP environment is done within software components. A software component is self-contained, and a reduced set of objects and features of the ABAP programming language can be used. The software component and development objects must be created in a namespace, so that clashes between software of different vendors and SAP are avoided. Therefore, a namespace must be reserved before the development can start. SAP note 105132 describes the namespace reservation process. The namespace must be reserved for the same customer number under which the “SAP BTP, ABAP ENVIRONMENT” tenants are licensed.

A software component version is a technically distinguishable unit of software and is installed and patched as a whole. It consists of ABAP development packages and contained objects. Software component versions are delivered via delivery packages. But software component versions are not individual shipment entities. They can only be delivered to customers as part of an add-on product version. A software component version is defined by a name and a version string. The name of a software component is string with a maximum of 30 characters and consists of the namespace and a freely chooseble part - /NAMESPC/COMPONENTA. The version consists of three numbers separated by a dot - 1.2.0. The numbers in the version string have a hierarchic relationship:

  • The first number denotes the release. Release deliveries contain the whole software component and carry planned, new functionalities or feature enhancements. They are provided with delivery packages of type Add-on Installation (AOI).
    Each AOI package contains all the objects of the software component. That means, every object is included in the object list of the package. In contrast to CSP and CPK packages, the calculation of objects to be included in the delivery is not based on a delta calculation.
  • The second number denotes the support package level. Support package deliveries contain a larger collection of corrections and may carry smaller, planned functional enhancements. They are provided with delivery packages of type Component Support Package (CSP).
    CSP packages are built with a delta process dependent on the previous state of the software component used for the build. That means, only the changes made since the last change of the support package level are included to the object list of the CSP.
  • The third number denotes the patch level. Patch deliveries shall only contain small, unplanned corrections that are necessary to keep the software up-and-running. They are provided with delivery packages of type Correction Package (CPK).
    CPK packages are built with a delta process dependent on the previous state of the software component used for the build. That means, only the changes made since the last change of the patch level are included in the object list of the CPK.

The type of delivery does not need to be chosen manually; it is automatically determined by the delivery tools.

Software Component Versions are uniquely created and independent from the add-on product versions where they are included. This means that once a software component version was built, it will be reused in any following add-on product versions where referenced.

Target Vector

As explained above, the shipment of a software takes place via add-on product versions. The delivered content of an add-on product version is defined in a target vector, which is used by the deployment tools. The target vector is derived from the addon.yml (more on that below) and contains the following information:

  • Product name
  • Product release
  • Product Support Package stack and Patch level
  • A list of contained software component versions with
  • Software component name
  • Software component release
  • Delivery Package, which delivers the versions

In ABAP Environment Pipeline stage Build a target vector for the particular add-on product version is published in test scope. This makes it possible to perform an add-on test installation in stage Integration Tests. At this point the new add-on product version is not available for add-on updates and can only be installed during system provisioning in the Integration Tests stage.

In stage Publish the target vector is then published in production scope, so that the new version will become available for add-on update and installation during system provisioning.

Building the Add-on Product

The build process of an add-on product is orchestrated by a Jenkins Pipeline, the ABAP Environment Pipeline provided in this project. To run this pipeline, it only needs to be configured – which will be explained in the sections “Prerequisites” and “Configuration”.

ABAP Environment Pipeline Build

The pipeline consists of different steps responsible for a single task. The steps themselves are grouped thematically into different stages. For example, early in the pipeline, an ABAP environment system needs to be created and the communication needs to be set up. This is done in the “Prepare System” stage. You can read more about the different stages in the ABAP environment pipeline documentation.

Different services and systems are required for the add-on build process.

Delivery Tools

With the following tools the add-on deliveries are created.

Assembly System

The ABAP system responsible for building packages based on software components in the systems. All actions related to the ABAP source code are executed on this system, e.g. running checks with the ABAP test cockpit (ATC) or the physical build of the software components. There are two communication scenarios containing the different APIs of the ABAP environment system: Test Integration and Software Assembly Integration. The assembly system should be of service abap/standard and be provisioned with parameter is_development_allowed = false to prevent local changes.

Add-on Assembly Kit as a Service (=AAKaaS)

The Add-on Assembly Kit as a Service is responsible for registering and publishing the add-on product. On a high level it is a service offered in the SAP Service & Support systems (thus access is granted via Technical Communication User) that, similar to the Software Delivery Assembler (SDA, transaction SSDA) as part of the SAP Add-On Assembly Kit, packs the deliveries into an importable package format.

Deployment Tools

With these SAP tools the assembled add-on deliveries are deployed to ABAP systems, for example into the installation test system.

Installation Test System

In order to verify that the delivery packages included in the add-on product version are installable, a target vector is published in "test" scope. In the Integration Tests stage an ABAP system of service abap/saas_oem is created. This makes it possible to install a specific add-on product version into an ABAP system that is provisioned. The installation test system should be be provisioned with the parameter is_development_allowed = false to prevent local changes.

Prerequisites

There are several parts that are required to run the pipeline for building an ABAP Environment Add-on.

Jenkins Server

The pipeline responsible for building ABAP add-ons has been created specifically for Jenkins. Therefore, a Jenkins Server is required. The piper project provides with Cx Server a life-cycle management tool to bootstrap a pre-configured Jenkins instance, which already includes the necessary configuration. Of course, it is also possible to configure an existing server.

Git Repository

The pipeline configuration is done in a git repository (for example on GitHub). This repository needs to be accessed by the Jenkins Server. If the repository is password protected, the user and password (or access token) should be stored in the Jenkins Credentials Store (Manage Jenkins → Manage Credentials).

Add-on Assembly Kit as a Service (=AAKaaS)

The communication with the AAKaaS needs a technical communication user. The creation and activation of such a user is described in SAP note 2174416. Make sure that this technical communication user is assigned to the customer number under which the SAP BTP, ABAP Environment instances are licensed and for which the development namespace was reserved. The user and password need to be stored in the Jenkins Credentials Store.

Cloud Foundry Access

ABAP environment systems are created in the SAP BTP cockpit. For this pipeline, the creation and deletion of the systems are automated via the Cloud Foundry command line interface: cf CLI. For this to work, two things need to be configured:

  • Cloud Foundry needs to be enabled on subaccount level. This can be done on the Subaccount Overview page. The subaccount is then mapped to a “Cloud Foundry Organization”, for which you must provide a suitable name during the creation. Have a look at the documentation for more details.
  • A (technical) platform user is required to access the Cloud Foundry Org and Space via the cf CLI. The user needs to be assigned as space member including Space Developer role in order to create/read service instances and service keys. The user and password need to be stored in the Jenkins Credentials Store.

Later, during the pipeline configuration, you will specify the service plan, which will be used for the creation of an ABAP environment system. Please make sure that there are enough entitlements for this assigned to the subaccount.

Register Add-on Product for a Global Account

The registration of a new add-on product is a manual step. Your add-on product should only be installed in ABAP systems within your global accounts. Therefore, the add-on product name and global accounts need to be registered with SAP:

Create an incident using component BC-CP-ABA, and provide the following information:

  • Add-on product name = addonProduct in addon.yml file, e.g. /NAMESPACE/NAME
  • Global production account ID = Account ID in section Global Account Info on the overview page of your global account, e.g. 151b5fdc-58c1-4a55-95e1-467df2134c5f (Feature Set A) or Global Account Info on the Usage Analytics page of your global account (Feature Set B).

This step can be triggered by you or by SAP partner management (governance process to be negotiated). As a response to the service request, SAP creates a configuration for the requested add-on product so that the add-on product can be installed in systems provisioned in the global account.

Configuration

In the following subsections, the pipeline configuration for this scenario is explained. Please refer to the configuration page.

Add-on descriptor file

The build process is controlled by an add-on descriptor file called addon.yml. This file must be created manually and must be stored in the GIT repository of the pipeline. It must contain information about the to-be-delivered add-on product version and the contained software component versions. Below, you see an example:

---
addonProduct: "/NAMESPC/PRODUCTX"
addonVersion: "1.2.0"
repositories:
  - name: "/NAMESPC/COMPONENTA"
    branch: "v1.2.0"
    version: "1.2.0"
    commitID: "7d4516e9"
    languages:
      - DE
      - EN
  - name: "/NAMESPC/COMPONENTB"
    branch: "v2.0.0"
    version: "2.0.0"
    commitID: "9f102ffb"
    languages:
      - DE
      - EN
      - FR

Explanation of the keys:

  • addonProduct: this is the technical name of the add-on product
  • addonVersion: This is the technical version of the add-on product <product version>.<support package stack level>.<patch level>

The section repositories contains one or multiple software component versions:

  • name: the technical name of the software component
  • branch: this is the branch from the git repository
  • version: this is the technical software component version <software component version>.<support package level>.<patch level>
  • commitID: this is the commitID from the git repository
  • languages: specify the languages to be delivered according to ISO-639. For all deliveries of an Add-on Product Version, the languages should not change. If languages should be added, a new Add-on Product Version must be created.

addonVersion influences solely the creation of the target vector. Without target vector nothing can be deployed. But it is possible to deploy combinations which have been build in the past (especially if the same software component version is part of multiple add-on products).

As a rule of thumb, the addonVersion should be increased analogous to the version of the leading software component. An exception can be the patch level in the addonVersion string: In case of an add-on product with a reuse software component, the patch level of the addonVersion might be higher than the patch level of the leading software component version.

The leading software component is the software component that is, as opposed to a reuse software component, exclusively used as part of one add-on product. In the repositories section of the add-on descriptor file the leading software component should be the first, whereas a reuse software component would be the last in order. This is to make sure that that the software components are imported in the correct order, making sure to adhere to dependencies.

The version of a software component influcences two aspects:

  • The given version will be used as part of the target vector
  • If there exists NO delivery package with the given version in AAKaaS the build of this package is performed

As a result, if the addonVersion is increased but references a software component (repository) version for which a delivery package has already been built, no new delivery package is built but only a new target vector is created. During add-on update such a target vector does not reference any new software component versions and the update of software components is skipped.

If the version of a software component is increased but not the addonVersion, a package is build but no new target vector is created, meaning the new package cannot be deployed.

If the add-on product consists of multiple software component versions, but only for one of them the version is increased (together with a new commitID), only for this software component version a new package will be created. If, at the same time, the addonVersion is increased a new target Vector will be created.

branch and commitID identify a specific state of a software component. Branches of a software component can include different lists of commits. The commitID should only be changed while also adjusting the version number of a software component. While adjusting the patch version or support package version of a software component, the branch should only be changed if the previous branch also includes the commitID of the previous software component version.

Versioning Rules

For the development and the provisioning of product-/software component versions, it is necessary to ensure, that there are no gaps within the version and level counters. Therefore, only a continuous increase in version numbers is allowed. The following examples show valid and invalid cases, respectively:

Valid increase:

  • 1.0.0 to 2.0.0
  • 1.1.2 to 2.0.0
  • 2.0.0 to 2.0.1
  • 2.1.0 to 2.2.0
  • 2.1.1 to 2.1.2

Invalid increase:

  • 1.0.0 to 3.0.0 (version 2.0.0 is missing; therefore, a product/component version is missing)
  • 1.1.2 to 2.1.0 (version 2.0.0 is missing; therefore, a product/component version is missing)
  • 2.0.0 to 2.0.2 (version 2.0.1 is missing; therefore, a patch level is missing)
  • 2.1.0 to 2.3.0 (version 2.2.0 is missing; therefore, a support package level is missing)
  • 2.1.1 to 2.1.3 (version 2.1.2 is missing; therefore, a patch level is missing)

Technically, the allowed number range for add-on product version and software component version is 1.0.0 to 9999.9999.9999.

The support package level of software component version can only go up until 369 because of technical limitations. For the patch level, there is a technical limit of 36³, limited to 9999.

Example

Please have a look at the configuration example to build and publish add-on products using a transient assembly system. As an alternative you can refer to the example using a permanent assembly system.

Troubleshooting

If you encounter an issue with the pipeline itself, please open an issue in GitHub.

Once execution of the Build stage, in particular the abapAddonAssemblyKitRegisterPackages step, has been completed, errors must be resolved by creating new software component versions with the correct configuration. Pipeline steps can be restarted without causing double execution of already perfomed steps (intermediate results are stored).

Common Issues

In case of an error during execution of the pipeline steps:

  • Stage: Prepare System
    • Step: abapEnvironmentCreateSystem
      • A service instance for the selected plan cannot be created in this organization or Quota is not sufficient for this request.
        ABAP System provisioning requires sufficient entitlements for abap/standard as well as abap/hana_compute_unit and abap/abap_compute_unit to be assigned to the subaccount.
  • Stage: Clone Repositories
    • Step: abapEnvironmentPullGitRepo
      • e.g. A4C_A2G/000 - Branch checkout for /NAMESPC/COMPONENTA is currently performed; Try again later...
        Parallel execution of multiple actions on the same software component (like checkout, pull etc.) is not supported.
  • Stage: ATC
  • Stage: Build
    • Step: abapAddonAssemblyKitReserveNextPackages
      • e.g. Package SAPK00C001CPITAPC1 was already build but with commit d5ffb9717a57c9e65d9e4c8366ea45be958b56cc, not with 86d70dc3
        New commitID, but no new software component version in add-on descriptor: Only by changing the version a new delivery package is created.
      • e.g. CommitID of package SAPK00C002CPITAPC1 is the same as the one of the predecessor package.
        New Patch Level of software component, but same commitID in add-on descriptor: The same commitID cannot be used as previous/current commit id for a correction package.
    • Step: abapEnvironmentAssemblePackages
      • e.g. Commit 7137bcb08c675dea9e08252ea269ebba1ca83226 not found
        New Patch Level of software component, and branch is changed in add-on descriptor: A commitIDof previously created patch version is not available in another branch.
  • Stage: Integration Tests
    • Step: abapEnvironmentCreateSystem
      • A service instance for the selected plan cannot be created in this organization or Quota is not sufficient for this request.
        ABAP System provisioning requires sufficient entitlements for abap/saas_oem as well as abap/hana_compute_unit and abap/abap_compute_unit to be assigned to the subaccount.
  • Stage: Post

Support Components

If issues cannot be resolved, please open a support incident on the respective support component:

Stage Steps Support Component
Initial Checks abapAddonAssemblyKitCheckPV, abapAddonAssemblyKitCheckCVs BC-UPG-OCS
Prepare System abapEnvironmentCreateSystem, cloudFoundryCreateServiceKey BC-CP-ABA
Clone Repositories abapEnvironmentPullGitRepo BC-CP-ABA-SC
ATC abapEnvironmentRunATCCheck BC-DWB-TOO-ATF
AUnit abapEnvironmentRunAUnitTest BC-DWB-TOO-ATF
Build cloudFoundryCreateServiceKey BC-CP-ABA
abapAddonAssemblyKitReserveNextPackages BC-UPG-OCS
abapEnvironmentAssemblePackages BC-UPG-ADDON
abapAddonAssemblyKitRegisterPackages BC-UPG-OCS
abapEnvironmentAssembleConfirm BC-UPG-ADDON
abapAddonAssemblyKitReleasePackages, abapAddonAssemblyKitCreateTargetVector, abapAddonAssemblyKitPublishTargetVector BC-UPG-OCS
Integration Tests abapEnvironmentCreateSystem, cloudFoundryDeleteService BC-CP-ABA
Publish abapAddonAssemblyKitPublishTargetVector BC-UPG-OCS
Post cloudFoundryDeleteService BC-CP-ABA

Note: Always attach the pipeline execution log ouput to the support incident, if possible including timestamps by using the Timestamper Jenkins plugin.

For troubleshooting purposes, the add-on descriptor file as well as build logs are archived as pipeline artifacts in the abapEnvironmentAssemblePackages step.