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Applies to SUSE Linux Enterprise Server for SAP Applications 15 SP1

3 Installing the Operating System Edit source

The following section provides instructions for installing the base operating system. Using the installation workflow, you can install either using a local installation medium or over the network. Alternatively, you can install using AutoYaST.

3.1 Using the Installation Workflow Edit source

The installation workflow is a guided installation of the operating system with optimized settings for SAP applications. During the installation workflow, you can choose whether you want to install an SAP application. If so, you will be asked to provide SAP installation media when the SUSE Linux Enterprise Server installation is finished. You can also choose whether to install third-party extensions.

This section assumes that you are starting the installation from a local medium. To learn how to start the installation from a remote medium, see Section 3.2, “Using SLES-SAP Media from the Network”.

For more information, see Section 2.5, “Overview of the Installation Workflow”.

This section guides you through the installation of the SUSE Linux Enterprise Server for SAP Applications operating system.

Important
Important: Installing Oracle Databases

To be able to install an Oracle database later, install SUSE Linux Enterprise Server first and then convert your installation to SUSE Linux Enterprise Server for SAP Applications.

This is necessary because the installer for Oracle databases queries for the existence of certain files, not all of which are included in an SLES-SAP installation.

For more information about converting, see Section 3.4, “Converting an SLES Installation to an SLES-SAP Installation”.

Procedure 3.1: Starting the OS Installation
    • On Intel 64/AMD64, boot from the DVD. From the DVD boot menu, select Installation.

    • On POWER, follow the instructions in the SUSE Linux Enterprise Server documentation, see Deployment Guide, Part Installation Preparation, Chapter Installation on IBM POWER (https://documentation.suse.com/sles-15).

    DVD Boot Menu
    Figure 3.1: DVD Boot Menu

    While the initial operating system is starting, you can view boot messages by pressing Esc. When this process has completed, the graphical installation workflow will start. As the first step, the installation workflow will check for updates for itself. After that, it will be ready to start the installation.

  1. Select the default system language under Language.

    Language, Keyboard and Product Selection
    Figure 3.2: Language, Keyboard and Product Selection
  2. Select the appropriate keyboard layout under Keyboard Layout. To test whether the selected layout matches your physical keyboard, use the text box Keyboard Test.

  3. SLE 15 SP1 provides a single installation ISO for the entire product line. Therefore, you need to select the product to install on this page.

    Under Product to install, choose SUSE Linux Enterprise Server for SAP Applications 15 SP1.

  4. Read the license agreement. If you agree, select I Agree to the License Terms. Proceed with Next.

    Otherwise, cancel the installation with Abort › Abort Installation.

  5. (Optional) If automatic network configuration via DHCP fails, the screen Network Settings will open.

    If instead the screen Registration appears, your network connection works. To change network settings anyway, click Network Configuration.

    When you are finished configuring networking, proceed with Next.

    Important
    Important: Configure Networking as Recommended by SAP

    Make sure to configure the network connection as recommended in the documentation provided to you by SAP.

    For information about configuring networking, see Administration Guide, Chapter Basic Networking, Section Configuring a Network Connection with YaST (https://documentation.suse.com/sles-15).

  6. On the screen Registration, enter your E-mail Address and Registration Code. Successful registration is a prerequisite for receiving product updates and the entitlement to technical support.

    Proceed with Next.

    Important
    Important: Register at This Step

    Make sure to register your system at this step in the installation. Otherwise, you can only install a minimal SLE system and will not receive updates.

    To install a full (but not updated) SLES-SAP system without network access during the installation, use the SLE 15 SP1 Packages ISO image from https://download.suse.com. You can then choose Skip registration on this page and select the SLE 15 SP1 Packages ISO image as an add-on product on the next page.

    Registration
    Figure 3.3: Registration
  7. When asked whether to enable update repositories, choose Yes.

  8. After the system is successfully registered, YaST lists available modules for SUSE Linux Enterprise Server for SAP Applications from the SUSE Customer Center. The default selection covers the most common cases. To enable an additional module, activate its entry.

    Proceed with Next.

    Note
    Note: Release Notes

    From this point on, the Release Notes can be viewed from any screen during the installation process by selecting Release Notes.

    Proceed with Next.

  9. (Optional) The Add On Product dialog allows you to add additional software sources (so-called repositories) to SUSE Linux Enterprise Server for SAP Applications, that are not provided by the SUSE Customer Center. Such add-on products may include third-party products, drivers, or additional software for your system.

  10. Choose the System Role. System roles are predefinied use cases which tailor the system for the selected scenario. For SUSE Linux Enterprise Server for SAP Applications, you can choose between:

    • SLES for SAP Applications: Default, recommended for most situations. This system role contains the following properties:

      • Supports the installation wizard for SUSE Linux Enterprise Server for SAP Applications.

      • Enables RDP access (Remote Desktop Protocol)

      • Provides special partitioning recommendations.

    • SLES with GNOME: Can be necessary in specific cases. This installation path is not covered in this document. For more information about this installation path, see Installation Quick Start, Section Installing SUSE Linux Enterprise Server (https://documentation.suse.com/sles-15).

    Additonal system roles are available for specific use cases (High Availability, text mode, minimal, and KVM/XEN virtualization hosts).

    Proceed with Next.

    System Role
    Figure 3.4: System Role
Procedure 3.2: Finishing the OS Installation
  1. Choose whether to enable the following options:

    • To install an SAP Application along with the system, activate Launch the SAP Installation Wizard right after the operating system is installed.

    • To enable RDP access (Remote Desktop Protocol) to this machine, activate Enable RDP service and open port in firewall.

      For more information about connecting via RDP, see Chapter 12, Connecting via RDP.

  2. Review the proposed partition setup for the volumes /dev/system/root and /dev/system/swap. The volume /dev/system/data will be created later, as described in Section 2.7, “Partitioning”.

    Suitable values are preselected. However, if necessary, change the partition layout. You have the following options:

    Guided Setup

    Create a new partitioning suggestion based on your input.

    Expert Partitioner

    Open the Expert Partitioner described in Deployment Guide, Chapter Advanced Disk Setup, Section Using the YaST Partitioner (https://documentation.suse.com/sles-15).

    For partitioning advice specific to SUSE Linux Enterprise Server for SAP Applications, see Section 2.7, “Partitioning”.

    To accept the proposed setup without changes, proceed with Next.

    Suggested Partitioning
    Figure 3.5: Suggested Partitioning
  3. Select the clock and time zone to use on your system. To manually adjust the time or to configure an NTP server for time synchronization, choose Other Settings. For detailed information, see Deployment Guide, Chapter Installation with YaST, Section Clock and Time Zone (https://documentation.suse.com/sles-15).

    Proceed with Next.

  4. Type a password for the system administrator account (called root) and repeat the password under Confirm Password. You can use the text box Test Keyboard Layout to make sure that all special characters appear correctly.

    In case you would like to enable password-less authentication via SSH login, you can import a key via Import Public SSH Key. If you want to completely disable root login via password, upload a key only and do not provide a root password. A login as system administrator will only be possible via SSH using the respective key in this case.

    For more information, see Deployment Guide, Chapter Installation with YaST, Section Password for the System Administrator root (https://documentation.suse.com/sles-15).

    Proceed with Next.

    Important
    Important: Do Not Forget the root Password

    The user root has the permission to carry out all administrative tasks. Without this password, you cannot log in to the system as root. The password entered here cannot be retrieved later.

  5. On the screen Installation Settings, you can review and, if necessary, change several proposed installation settings. Each setting is shown alongside its current configuration. To change parts of the configuration, click the appropriate headline or other underlined items.

    Important
    Important: Firewall Configuration

    The software firewall of SLES-SAP is enabled by default. However, often, the ports your SAP product requires to be open are not opened automatically. This means that there may be network issues until you open the required ports manually.

    For details, see Section 9.1, “Configuring firewalld.

    Installation Settings
    Figure 3.6: Installation Settings
  6. When you are satisfied with the system configuration, click Install.

    Depending on your software selection, you may need to agree to further license agreements before you are asked to confirm that you want to start the installation process.

    Warning
    Warning: Deletion of Data

    The installation process fully or partially overwrites existing data on the disk.

    In the installation confirmation box, click Install.

    When the installation of the operating system is finished, the system will reboot automatically:

    • If you chose to only prepare the system for installation, the system will boot to a desktop login screen.

    • If you chose to install an SAP application now, the installation will continue after a reboot. Continue with Chapter 4, Installing SAP Applications.

3.2 Using SLES-SAP Media from the Network Edit source

This section provides a short description of how to install from an installation medium served over the network. This allows, for example, using a regular SLES medium to install SLES-SAP.

  1. Copy the content of the SUSE Linux Enterprise Server for SAP Applications DVD to a Web server (for example, example.com), to the directory /srv/www/htdocs/sap_repo.

  2. Boot from an SLES installation medium.

  3. Select one of the boot menu options using the keys /. Then add to the command line. To do so, specify the parameters listed below:

    • To allow network usage, add ifcfg=*=dhcp (though this should be the default).

    • Add the parameter install=SERVER/DIRECTORY.

  4. Follow the instructions in Section 3.1, “Using the Installation Workflow”.

For more information, see Deployment Guide, Chapter Remote Installation (https://documentation.suse.com/sles-15).

To avoid having to use an SLES installation medium to initialize the system, you can boot over the network via PXE. For details, see AutoYaST Guide, Chapter Booting via PXE over the Network (https://documentation.suse.com/sles-15).

3.3 Using an External AutoYaST Profile Edit source

For more information about installing with AutoYaST, see:

For more information about partitioning for SAP applications with AutoYaST, see Section 2.7, “Partitioning”.

If you plan to deploy SUSE Linux Enterprise Server for SAP Applications from a SUSE Manager server, refer to SUSE Manager Reference Manual, Systems, Autoinstallation and SUSE Manager Advanced Topics, Chapter Minimalist AutoYaST Profile for Automated Installations and Useful Enhancements (https://documentation.suse.com/suma).

3.4 Converting an SLES Installation to an SLES-SAP Installation Edit source

To convert an installation of SUSE Linux Enterprise Server 15 SP1 or JeOS 15 SP1 to an installation of SLES-SAP, use the script Migrate_SLES_to_SLES-for-SAP.sh. The script will register the system correctly and subscribe it to the appropriate repositories.

Make sure that you have an e-mail address for registration and a registration code for SLES-SAP.

  1. Install the package migrate-sles-to-sles4sap.

  2. Execute the following command:

    root # Migrate_SLES_to_SLES-for-SAP.sh
  3. When asked to confirm to continue the migration, press Y, then Enter.

  4. When asked, type the e-mail address to use for registration, then press Enter.

  5. When asked, type the registration key, then press Enter.

    Wait until the script is finished. Afterward, you are subscribed to the SUSE Linux Enterprise Server for SAP Applications software repositories and the package SLES-release is removed in favor of SLES_SAP-release.

Important
Important: Script Does Not Install Default SLES-SAP Packages

The script does not install all packages that are included with a default SLES-SAP installation. However, you can install these yourself manually. To install the default package selection, use:

root # zypper in patterns-sles-sap_server
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