The PowerBroker Identity Services Open (PBISO) authentication method is one of the supported solutions for performing an offline domain join.

PowerBroker Identity Services Open (PBISO) Authentication supports offline domain join with Active Directory for instant-cloned desktops running the following Linux distributions.

  • Ubuntu 18.04/20.04/22.04
  • RHEL 7.9

Use the following steps to join a Linux virtual machine to Active Directory (AD) using PBISO.

Prerequisites

To use PBISO with an instant-clone floating desktop pool, first install the krb5-user package on the source template VM. For example, on an Ubuntu VM, you can use the following installation command: 
apt-get install krb5-user

Procedure

  1. Download PBISO 9.1.0 or later from its official download site at https://github.com/BeyondTrust/pbis-open/releases.
  2. Install PBISO on your Linux virtual machine. For example, on Ubuntu 20.04: 
    sudo ./pbis-open-9.1.0.551.linux.x86_64.deb.sh
  3. Install Horizon Agent for Linux.
  4. Use PBISO to join the Linux virtual machine to the AD domain.
    In the following example, lxdc.vdi is the domain name and administrator is the domain user name. 
    sudo domainjoin-cli join lxdc.vdi administrator
  5. Set up the default configuration for domain users. 
    sudo /opt/pbis/bin/config UserDomainPrefix lxdc 
sudo /opt/pbis/bin/config AssumeDefaultDomain true 
sudo /opt/pbis/bin/config LoginShellTemplate /bin/bash 
sudo /opt/pbis/bin/config HomeDirTemplate %H/%U
  6. Edit the /etc/pam.d/common-session file.
    1. Locate the line that says session sufficient pam_lsass.so.
    2. Replace that line with session [success=ok default=ignore] pam_lsass.so.
    Note: You must redo this step after you reinstall or update Horizon Agent.
  7. Restart the Linux virtual machine and log in.

What to do next

Note:
  • If the /opt/pbis/bin/config AssumeDefaultDomain option is set to false, you must update the SSOUserFormat=<username>@<domain> setting in the /etc/vmware/viewagent-custom.conf file.
  • When using instant-clone floating desktop pools, to avoid losing the DNS Server setting when you add the new network adapter to the cloned virtual machine, modify the resolv.conf file for your Linux system. Use the following example, for an Ubuntu system, as a guide for adding the necessary lines in the /etc/resolv.conf file.
    nameserver 10.10.10.10
search mydomain.org