JRE libraries are missing or not compatible error when running the Spectrum Installer

Products

• Network Observability

Issue/Introduction

When running the Spectrum Installer on linux an error is returned and the installer exits.


"JRE libraries are missing or not compatible"

Cause

The /tmp filesystem was mounted with the 'noexec' flag which prevents anything from being executed on the filesystem. Spectrum uses
   InstallAnywhere which extracts the installer files under /tmp and executes the java installer from there.

Resolution

1. Create an alternate tmp location and map an InstallAnywhere environment variable to point to the new location

    ex.
   
   mkdir -p /opt/tmp
   chmod 774 /opt/tmp

   export IATEMPDIR=/opt/tmp 
   ./setuplin.exe


2. In the case of using 'sudo' for the install. Sudo will not see the environment variable set in the session 

    - update the sudoers (/etc/sudoers) file to allow the IATEMPDIR env to be set
  
      /etc/sudoers
   Defaults        env_keep +="IATEMPDIR"

   - execute the installer using sudo while setting the env as well

   sudo IATEMPDIR=/opt/tmp ./setuplin.exe


   Note: If the sudoers file is not updated it may not allow the environment variable and you could see an error like

      "sudo: sorry, you are not allowed to set the following environment variables: IATEMPDIR"