Solaris 8 to Solaris 10 migration

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Solaris 8 to Solaris 10 migration

Tuesday, December 12. 2006

It´s only a thought game and this blog entry is more a note to myself. I know we have the binary compatibility guarantee, but i know customers, who would like to take their complete Sol8 environment onto new machines. They don´t want to requalify the perl binaries and they don´t want to change the configuration or startup scripts. Now Sol 8 doesn´t run the newest machine. i thought a little bit about this problem. Between two coffees i drafted an idea:

Host A is a Solaris 8 system with an old application. Host B is a ultranew Sol 10 system. Same architecture.
Step 1: Checking the application binary with ldd on host A, which libaries will be loaded by the application.
Step 2: Snoop with truss on host A which files were accessed and which binaries where forked while running the application
Step 3: Stripe the leading slash, and copy all files found in step 1 and 2 from Host A to Host B relative to a directory (eg /lib/libm.so.2 will be copied to /export/app/foobar/lib/libm.so.2
Step 4: Run the Application in a chroot jail like chroot /export/app/foobar solaris8application

Is this feasible? Did i forgot something? i think i have something to try out between christmas and new years eve ...

Posted by Joerg Moellenkamp in English, Solaris at 18:55 | Comments (5) | Trackbacks (0)

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shouldn't step 2 be trussing binary on A? Seems that it's not that easy

#1 molli123 (Homepage) on 2006-12-12 21:23 (Reply)

Obviously you are right. I´ve corrected it ...

#1.1 Joerg (Homepage) on 2006-12-12 21:27 (Reply)

If you don't do any coverage testing the truss trace in step 2 may miss some important files that are maybe only access in special situations.

If you have binary compatibility, why not take the entire Sol8 system and run it under the Sol10 kernel (or maybe Sol10 kernel+libC) in the chroot jail?

One could even think of some kind of "Sol8 branded zone" instead of the chroot.

#2 Florian Laws (Homepage) on 2006-12-12 21:46 (Reply)

Okay, the easiest way would a complete copy of the system (maybe by flash archives). But then you have many files in your chroot jail that you don´t need. However with current disk size this wouldn´t an issue (perhaps as compressed zfs) but this wouldn´t be elegant

I think Sol8 branded zone would the most efficent solution. It´s would be quite similar to the solution mentioned above.

#2.1 Joerg (Homepage) on 2006-12-12 21:53 (Reply)

Hmm ... hell ... well, perhaps its much simpler to create such an branded zone. It´s just a sudden inspiration but how about creating a zone with now inherited package directories and after creating it and foist the Zone a decompressed flar of the Sol8 environment ...

I will check that as soon as possible.

#2.2 Joerg (Homepage) on 2006-12-12 22:03 (Reply)

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