Configuring the Linux operating system for AE Services Software-Only installation on on-premise

Last Updated : Apr 24, 2024 |

About this task

Use this procedure to configure the Linux operating system for software-only installation on on-premise.

Before you begin

  • Log in to Linux using the root credentials.

  • Back up the following files and folders (if present), before installing AE Services:

    • /etc/openldap

    • /etc/sssd

    • /etc/ssh

    • /etc/pam.d

    • /etc/ldap.conf

    • /etc/nslcd.conf

    • /etc/resolv.conf

    • /etc/hosts

Procedure

  1. In the /etc/sysconfig/network-scripts/ifcfg-ensXXX or /etc/sysconfig/network-scripts/ifcfg-eth0, set the ONBOOT file attribute to Yes.
  2. If the network interface is not currently set to eth0, use GRUB Changes to rename network interface to eth0.
    1. Type vi /etc/default/grub.
    2. Look for the line GRUB_CMDLINE_LINUX and add the following: 
      net.ifnames=0 biosdevname=0 (with example) (GRUB_CMDLINE_LINUX="crashkernel=auto rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet net.ifnames=0 biosdevname=0")
    3. Click Save.
    4. Type grub2-mkconfig -o /boot/grub2/grub.cfg.
    5. If you have not specified names for the interface files during the installation, rename /etc/sysconfig/network-scripts/ifcfg-* to /etc/sysconfig/network-scripts/ifcfg-eth0 using the below command: 
      mv /etc/sysconfig/network-scripts/ifcfg-ens  /etc/sysconfig/network-scripts/ifcfg-eth0

      • Open /etc/sysconfig/network-scripts/ifcfg-eth0.

      • Update DEVICE and NAME value from esn* to eth0.

  3. Disable the firewall by entering the command: 
    systemctl disable firewalld
    Warning:

    This is a slow process and affects system performance when logging is enabled.

  4. Disable journaling for systemd as follows: 
    systemctl disable systemd-journald.service
systemctl disable systemd-journald.socket

    Make sure you see the line SELINUX=disabled in the /etc/selinux/config file.

  5. Do the following to create entries in the /etc/hosts file and edit the /etc/hosts command:
    1. Make sure IPv4 and IPv6 loopback entries are added in the /etc/hosts file. The loopback entries must be in the following formats:

      • 127.0.0.1 localhost.localdomain localhost

      • ::1 localhost6.localdomain6 localhost6

      Caution:

      If you need to use the IPv6 architecture, it must be dual stack (IPv6 and IPv4).

      Only IPv6 is not supported.

    2. Edit /etc/hosts and add an entry for your server. For example: ipAddress fqdn hostname.
  6. In /etc/resolv.conf edit nameserver. If nameserver is not present, add it.
  7. Run hostname <hostname>, where <hostname> is the host name entry you added.
  8. Run shutdown –r now
Related information
Deploying Avaya Aura Software-Only ISO image on on-premise, AWS, Microsoft Azure, and Google Cloud Platform