Re: [HTCondor-users] Configuring Ubuntu22 cluster, missing config step?

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

On 3/22/2023 9:15 PM, Moore, Nathan T via HTCondor-users wrote:

Iâm configuring condor on a small cluster of linux boxes.  Machines are on an isolated network.  IPâs are static and Iâm using /etc/hosts instead of dns for hosts to resolve machine name to IP. 

 

It seems like I missed a configure step in the install/configure procedure. Suggestions appreciated.

 

    Hi Nathan,
    
    Some suggestions:
    
    1. When using host names, HTCondor (like a lot of other internet
    software) really wants to see fully qualified domain names (FQDN) as
    the first entry in each line /etc/hosts, and aliases that
    are not fully qualified can follow.  Ie the first entry on each line
    should have a host.domain.edu.  For instance, for an entry in
    /etc/hosts should look like this:
       
        199.17.158.6 physlin2.winona.edu physlin2
      
      and not like this:
    
       
        199.17.158.6 physlin2
        physlin2.winona.edu
        
      2. If for some reason you cannot edit/change the /etc/hosts
      file, or it is still broken, you can set the DEFAULT_DOMAIN_NAME
      HTCondor config knob.  See
https://htcondor.readthedocs.io/en/latest/admin-manual/configuration-macros.html#DEFAULT_DOMAIN_NAME   
      Example:
      
          # echo "DEFAULT_DOMAIN_NAME =
        winona.edu" > /etc/condor/config.d/15-SetDomain.conf
      
    3. Confirm that your /etc/nsswitch.conf file uses files for
    host lookups, i.e. it should have a line similar to "hosts: files
    dns"
    
    Hope the above helps,
    Todd