If PROP is used, don't you have to have a console session in /etc/inittab such as "1:2345:respawn:/bin/bash" ? Are there alternatives to the root shell? How would say "1:2345:respawn:/sbin/mingetty console --noclear" compare and will it work with the PROP command structure? Other ideas about the best console implementation for a z/VM 3270 console deployment? Thanks
Hall, Ken (IDS DCS PE) wrote:
If your console (3270) is logged on to linux (has a command prompt instead of "login:"), you can use the VM msg mechanism to send commands to the linux guest. Two caveats:
1) The console has to be logged on. We solved this by using a patch to the mingetty program.
2) VM translates all commands to upper case, so whatever you run has to be ALL CAPS.
We used this to run a "healthcheck" script at intervals, rather than having cron kick it off. It wasn't 100% reliable though, because if the console hangs up for some reason, you don't get any feedback, the msg is just absorbed by the guest.
-----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of Rich Smrcina Sent: Tuesday, February 01, 2005 10:46 AM To: [email protected] Subject: Re: [LINUX-390] z/VM commands to Linux guests?
Rexec comes to mind, but there are security issues related to it's use.
There are open source packages that can be configured fairly easily to do this. Big Brother or it's open source follow on 'Hobbit' is my personal favorite. Nagios is another one. The both provide easy to read web pages to check on the status of things, also pager and email notification is available.
Peter E. Abresch Jr. - at Pepco wrote:
We are writing a REXX exec to run under z/VM to verify the
status of our
Linux guests. The purpose of this script is to provide an
easy mechanism
for our operators to verify the health of the Linux guests.
Is there a
mechanism from z/VM to issue Linux commands to a Linux
guest and capturing
the output? I know we can go from Linux and issue z/VM
commands. Thanks.
Peter
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