Re: Fully Qualified Hostname in ITM

The L3 engineer who works on ITMhostName - he has lost 67% of his 
remaining hair working on this. Trying to figure handle all the different 
linux/unix combinations, some with /etc/hosts and some with DSN and some 
with broken responses. And then... matching the results up to some Java 
API result so everything is smooth... my mind boggles.

He is really amazing, though. To handle an AIX environment where it was 
all but impossible to generate the "stop process" commands, he took the 
known start commands in /etc, converted them from start to stop in a Korn 
shell script and ran the result.

Regards, 

  



John Alvord - Ph: 1-720-396-2788    Cell: none 
Customer Support - Tivoli Software - jalvord-r/[email protected]
Advisory Engineer - Tivoli Monitoring - ITM infrastructure
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From:   "[email protected]" <[email protected]>
To:     "Discussion list for Tivoli product and Tivoli Ready products." 
<[email protected]>, 
Date:   03/13/2013 03:03 PM
Subject:        Re: [TME10] Fully Qualified Hostname in ITM
Sent by:        [email protected]



And you can see from the ITMhostName script (UNIX/Linux) itself that it 
gets 4 potentially distinct hostname values from uname and hostname 
variants:

# The hostname command returns the local host name.
localName=`uname -n`
localSName=`print $localName | cut -d'.' -f1`
# hostname value
localHName=`hostname 2>/dev/null`
# short hostname value
localHSName=`print $localHName | cut -d'.' -f1`

networkIP=""
networkName=""
networkSName=""

# This will first find the localname - then append to the same
# line the local hostname if the flag is specified and it is different
# than the localname
if [ "$Option" = local ]; then
  [ "$Length" = long ] && localresult=$localName || 
localresult=$localSName
  if [ "$Mode" = "many" ]; then
    [ "$Length" = long ] && localhostname=$localHName || 
localhostname=$localHSName
    if [ "$localhostname" != "$localresult" ]; then
      localresult="$localresult $localhostname"
    fi
  fi
  print $localresult


So it tries to cover the bases....

Toben

On Wed, Mar 13, 2013 at 10:59 AM, Loren Cain <[email protected]> wrote:
There's a script called ITMhostName that seems to use every method 
imaginable (except the hostname command) to guess the hostname, but I'm 
not sure it's the only mechanism used by ITM, or if every part of ITM uses 
it consistently (it has a number of command line options).

In my installation, I had to surgically remove much of that script because 
it was causing way too many problems, including long delays while 
attempting to query DNS servers that don't exist. Also, the watchdog 
process appears to use some other mechanism to determine the hostname, 
which was causing it to kill off my running agents at midnight because the 
hostnames didn't match (even case mismatch was enough to do it).

Loren Cain


On Wed, Mar 13, 2013 at 11:45 AM, Gregory Mendes <
[email protected]> wrote:
Basic question.
 
Where does the agents pull their fully qualified hostname from when there 
are no /etc/hosts file?  When I type hostname I get the FQN but when I 
installed the agents I don't.
 
I see RUNNINGHOSTNAME but it's not fully qualified.
 
Regards,

Gregory R. Mendes
Tivoli Architect/Tools Specialist
Mendes, Inc.
Tivoli Monitoring 6.2.3 Certified
770-317-8593


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