3 Installing the operating system #

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.

Select the default system language under Language.

Figure 3.1: Language, keyboard and product selection #

  

Select the appropriate keyboard layout under Keyboard Layout. To test whether the selected layout matches your physical keyboard, use the text box Keyboard Test.

SLE 15 SP4 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 SP4.

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.

(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: 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).

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: 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 for SAP system without network access during the installation, use the SLE 15 SP4 Packages ISO image from https://download.suse.com. You can then choose Skip registration on this page and select the SLE 15 SP4 Packages ISO image as an add-on product on the next page.

When asked whether to enable update repositories, choose Yes.

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.

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.

(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.

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

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

Proceed with Next.

Figure 3.2: System role #

  

Choose whether to enable the following options:

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:

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

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.

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 want 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: 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.

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: Firewall configuration

The software firewall of SLES for 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 10.1, “Configuring firewalld”.

Figure 3.3: Installation settings #

  

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: 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:

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

Boot from an SLES installation medium.

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

Follow the instructions in Section 3.1, “Installation workflow”.

Install the package migrate-sles-to-sles4sap.

Execute the following command:

# Migrate_SLES_to_SLES-for-SAP.sh

When asked to confirm to continue the migration, press Y, then Enter.

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

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.