I would lean towards defining a second "idle" production instance, copying
the disk image from the "test" system to it, and then arranging to shut
down the primary production instance and going live with the secondary.
You'd then retain the most recently shut down instance until you can
confirm the stability of the replacement.
Of course there are "identity" (SSH/SSL keys and certificates) issues that
need to be worked out but
The biggest issue, of course, is dependant upon how much of an outage you
can afford to take.
Any deployment strategy has to face the need for cutovers and an ability to
fall back to a previous level *but* almost every strategy has to face the
need for an outage. Working out what your outage window is will drive your
strategy for the cutover process.
(looks above)
I think I just said, in a lot of extra words, "It Depends..."; perhaps I
could qualify a Fed chairman?
-soup
--------------------
John R. Campbell, Speaker to Machines (GNUrd) (813) 356-5322 (t/l 697)
Adsumo ergo raptus sum
MacOS X: Because making Unix user-friendly was easier than debugging
Windows.
Red Hat Certified Engineer (#803004680310286)
----- Forwarded by John Campbell/Tampa/IBM on 03/17/06 12:33 PM -----
"Szwed, Tomasz"
<[EMAIL PROTECTED] To:
LINUX-390@VM.MARIST.EDU
my.mil> cc:
Sent by: Linux on Subject: [LINUX-390] Switching
Linux minidisk200's
390 Port
<[EMAIL PROTECTED]
IST.EDU>
03/16/06 03:44 PM
Please respond to
Linux on 390 Port
I have 2 instances of Linux on z/VM (SUSE 8.0). One is production, the
other
is test. The test instance is updated with patches. I want to update the
production with all the patches. Is there a way to clone the test instance
minidisk200 (the one with the patches), then "switch" it with the
production
minidisk200? Does anyone have an instruction/manual how to switch - I
don't
have much experience with z/VM or Linux.
Tomasz Szwed
HQ USMEPCOM J-6/MIT-SSD
847-688-3680 ex. 7281
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