LB2.0 migration

From EgeeWiki

This page is a homepage of a migration to LB2.0 process preparation, testing and documentation effort.

Contents 1 Status 2 Migration process 2.1 L&B server steps 2.2 L&B proxy steps 3 Documentation 4 Migration process tests 4.1 Description of test performed 5 Work area 5.1 Testovací prostředí

Status

Tests done, documentation prepared. Known bugs/issues solved or described in the doc.

Migration process

• tested environment: LB 1.9.x from RPMs SL4 32bit (mysql 4.1.22-2), LB server node, migration to SL5 64bit (mysql 5.0.45-7) LB2.0 RPM
• migration differs between type of LB (proxy, server)

L&B server steps

1. stop LB server
2. stop mysql server
3. upgrade/transfer data
4. tune mysql database (required to support bigger transactions), see admin guide, section 2.2.11
5. run migration script installed with lb-server (link to CVS here), takes a while

   bash -x /opt/glite/etc/glite-lb-migrate_db2version20 -s

6. check the L&B indexes (admin guide, section 3.2.2)

   You may need to add LastUpdateTime for monitoring services.

7. start the L&B server

L&B proxy steps

TODO: L&B proxy server 2.0 not released yet.

Migration like L&B server, except the different migration script parameter:

bash -x /opt/glite/etc/glite-lb-migrate_db2version20 -p

Documentation

• Documentation of the migration tool and process will be part of LBAG sources.

Migration process tests

• basic migration test
  • fresh LB 1.9.2 installation SL4, a test batch of jobs generated by a script via standard WMS (VOCE), including collections
  • migration process (move to SL5 32 bit, database file level copy)
  • LB test plan tests performed (LB still working)
  • old jobs states and events available after migration (test states of a few pre-migration jobs)
  • old job update test
    • submit a event to a few pre-migration jobs and test its states
  • "purge everything" test
• real dataset test
  • the same as the basic test but using a copy of a production LB database

• misc
  • migration script run by mistake doesn't harm already migrated LB 2.0 or running server (should it be tested?)

Description of test performed

Unofficial performed tests low level technical description also available on request (F.Dvořák).

Work area

Testovací prostředí

• Vlastní testy na evelýně (SL32-4) a delwinovi (SL64-5).
• Postup upgrade RPM balíky, spuštění skriptu - dopsat do LBAG.
• Přes VOCE posílání skutečných jobů - skript posílající joby.
• Reálná databáze a její pošolíchání (hostname). Získat přes Z.Salveta.
• Přesně popis testů posunutí jobů které existovali před migrací.
• Jaké verze (RPMka) budeme testovat (původní).