Spot resource (Shared product Object Tree) is a fundamental object needed when installing or customizing new lpars. It contains the necessary files (/usr) to mount and access the resources needed during setup phase (mksysb, lpp_source, etc.).
root@nim01:/home/src582# nim -o define -t spot -a server=master -a source=lpp-aix720501-FULL -a location=/export/spot/spot-aix720501 spot-aix720501
Let’s start from AIX 7.2 base release LPP Source ,in order to define our new LPP_SOURCE resource:
root@nim01:/export/lpp_source/lpp-aix720501-FULL# nim -o define -t lpp_source -a server=master -a source=/export/lpp_source/lpp-aix720000-FULL -a location=/export/lpp_source/lpp-aix720501-FULL lpp-aix720501-FULL Preparing to copy install images (this will take several minutes)…
Resource creation and update tasks ended without errors, let’s run another check:
root@nim01:/export/lpp_source/lpp-aix720501-FULL# nim -o check lpp-aix720501-FULL root@nim01:/export/lpp_source/lpp-aix720501-FULL#
Let’s remove eventual duplicate or superseded filesets:
root@nim01:/export/lpp_source/lpp-aix720501-FULL# nim -o lppmgr -a lppmgr_flags=rub lpp-aix720501-FULL lppmgr: Source table of contents location is /export/lpp_source/lpp-aix720501-FULL/installp/ppc/.toc lppmgr: Building table of contents in /export/lpp_source/lpp-aix720501-FULL/installp/ppc .. lppmgr: Building table of contents completed. lppmgr: Generating duplicate list.. lppmgr: Generating base level duplicate list..
Processing units : indica il numero dei core installati in macchina , in assenza di altri processor pools definiti sono tutti assegnati ad uno shared processor pool.
Cap o no cap :
A livello di profilo della Lpar possiamo definire sostanzialmente due modalità:
Uncapped
in questa modalità il profilo prevede l’impostazione di un valore di minimum cpu, ovvero il valore minimo garantito alla lpar, in mancanza del quale la lpar non si avvia, il desired ossia il valore di default assegnato alla lpar in presenza di cicli disponibili, ed il maximum che in questo caso perde di significato dal momento che la partizione uncapped può attingere dalloshared processor pool del server in caso di necessità seguendo un meccanismo di priorità basato su un “peso” assegnato al profilo della partizione.
Capped
in questo caso i valori minimum e desired sono identici al caso precedente ed il maximum si comporta come limite massimo del valore assegnato , sia esso processing unit, virtual cpus , ecc.
Virtual cpus e processing units:
Una regola fondamentale per il disegno di un profilo lpar riguarda il rapporto tra le physical processing units e le virtual cpus; infatti è bene fare in modo che il numero delle desired vcpus coincida con il maximum processing units . Per esempio se ho 1 vp posso usare solo fino 1 PU anche se la partizione è uncapped e magari lo shared processor pool potrebbe permettere alla lpar di scalare il numero di cpu utilizzabili; il numero delle vcpus rappresenta il limite fino a cui attingere risorse libere quando richiesto, oltre il valore di “entitled capacity”.
NIMADM or Network Installation Manager Alternate Disk Migration, is a facility that helps you to seamlessly clone and upgrade your lpar to a new AIX release.
In the following example lpar01 is at 7100-05-05-1939 level, we ‘d like to upgrade it to 7200-03-03-1914 with the least possible downtime .
The entire nimadm process splits into 12 phases that allows to fully customize the target environment.
root@nim01:/download/AIX/PTF/# nimadm -l lpp-aix720303-FULL -c lpar01-int -s spot-aix720303 -d hdisk0 -Y Initializing the NIM master. Initializing NIM client lpar01-int.
Verifying alt_disk_migration eligibility. Initializing log: /var/adm/ras/alt_mig/lpar01-int_alt_mig.log Starting Alternate Disk Migration.
Restoring device ODM database.
+—————————————————————————–+ Executing nimadm phase 7. +—————————————————————————–+ nimadm: There is no user customization script specified for this phase.
+—————————————————————————–+ Executing nimadm phase 8. +—————————————————————————–+ Creating client boot image. bosboot: Boot image is 59393 512 byte blocks. Writing boot image to client’s alternate boot disk hdisk0.
+—————————————————————————–+ Executing nimadm phase 9. +—————————————————————————–+ Unmounting client mounts on the NIM master. forced unmount of /lpar01-int_alt/alt_inst/var/adm/ras/livedump forced unmount of /lpar01-int_alt/alt_inst/var forced unmount of /lpar01-int_alt/alt_inst/usr forced unmount of /lpar01-int_alt/alt_inst/tmp forced unmount of /lpar01-int_alt/alt_inst/opt/ocsinventory forced unmount of /lpar01-int_alt/alt_inst/opt/netbackup forced unmount of /lpar01-int_alt/alt_inst/opt/nagios forced unmount of /lpar01-int_alt/alt_inst/opt/freeware/webmin forced unmount of /lpar01-int_alt/alt_inst/opt/bmc forced unmount of /lpar01-int_alt/alt_inst/opt/IBM forced unmount of /lpar01-int_alt/alt_inst/opt forced unmount of /lpar01-int_alt/alt_inst/logs forced unmount of /lpar01-int_alt/alt_inst/home forced unmount of /lpar01-int_alt/alt_inst/admin forced unmount of /lpar01-int_alt/alt_inst
Verifying altinst_rootvg… Modifying ODM on cloned disk. forced unmount of /alt_inst/var/adm/ras/livedump forced unmount of /alt_inst/var/adm/ras/livedump forced unmount of /alt_inst/var forced unmount of /alt_inst/var forced unmount of /alt_inst/usr forced unmount of /alt_inst/usr forced unmount of /alt_inst/tmp forced unmount of /alt_inst/tmp forced unmount of /alt_inst/opt/ocsinventory forced unmount of /alt_inst/opt/ocsinventory forced unmount of /alt_inst/opt/netbackup forced unmount of /alt_inst/opt/netbackup forced unmount of /alt_inst/opt/nagios forced unmount of /alt_inst/opt/nagios forced unmount of /alt_inst/opt/freeware/webmin forced unmount of /alt_inst/opt/freeware/webmin forced unmount of /alt_inst/opt/bmc forced unmount of /alt_inst/opt/bmc forced unmount of /alt_inst/opt/IBM forced unmount of /alt_inst/opt/IBM forced unmount of /alt_inst/opt forced unmount of /alt_inst/opt forced unmount of /alt_inst/logs forced unmount of /alt_inst/logs forced unmount of /alt_inst/home forced unmount of /alt_inst/home forced unmount of /alt_inst/admin forced unmount of /alt_inst/admin forced unmount of /alt_inst forced unmount of /alt_inst Changing logical volume names in volume group descriptor area. Fixing LV control blocks… Fixing file system superblocks… Bootlist is set to the boot disk: hdisk0 blv=hd5
+—————————————————————————–+ Executing nimadm phase 12. +—————————————————————————–+ Cleaning up alt_disk_migration on the NIM master. Cleaning up alt_disk_migration on client lpar01-int.
alt_disk_copy con upgrade fallisce con errori relativi a dynatrace:
################################################## Tue Mar 31 10:51:45 CEST 2020 cmd: /usr/sbin/alt_disk_copy -d hdisk1 -B update_all -l /mnt/AIX/PTF/Aix-72-03-03-FULL/ -e Calling mkszfile to create new /image.data file. Checking disk sizes. Creating cloned rootvg volume group and associated logical volumes. Creating logical volume alt_hd5 Creating logical volume alt_hd6 Creating logical volume alt_hd8 Creating logical volume alt_hd4 Creating logical volume alt_hd2 Creating logical volume alt_hd9var Creating logical volume alt_hd3 Creating logical volume alt_hd1 Creating logical volume alt_hd10opt Creating logical volume alt_hd11admin Creating logical volume alt_lg_dumplv Creating logical volume alt_livedump Creating logical volume alt_nagios Creating logical volume alt_fslv00 Creating logical volume alt_logs Creating logical volume alt_ocsinv Creating logical volume alt_netbackup Creating logical volume alt_bmc Creating /alt_inst/ file system. Creating /alt_inst/admin file system. Creating /alt_inst/download file system. Creating /alt_inst/home file system. Creating /alt_inst/logs file system. Creating /alt_inst/opt file system. Creating /alt_inst/opt/bmc file system. Creating /alt_inst/opt/nagios file system. Creating /alt_inst/opt/netbackup file system. Creating /alt_inst/opt/ocsinventory file system. Creating /alt_inst/tmp file system. Creating /alt_inst/usr file system. Creating /alt_inst/var file system. Creating /alt_inst/var/adm/ras/livedump file system. Generating a list of files for backup and restore into the alternate file system… Backing-up the rootvg files and restoring them to the alternate file system… 0505-148 alt_disk_install: WARNING: an error occurred during backup. Modifying ODM on cloned disk. Building boot image on cloned disk. exec(): 0509-036 Cannot load program /usr/bin/ksh because of the following errors: 0509-150 Dependent module /opt/dynatrace/oneagent/agent/lib/liboneagentproc.so could not be loaded. 0509-022 Cannot load module /opt/dynatrace/oneagent/agent/lib/liboneagentproc.so. 0509-026 System error: A file or directory in the path name does not exist. 0505-120 alt_disk_install: Error running bosboot in the cloned root volume group. Cleaning up.
Abbiamo aperto un case al supporto che ha rilevato che Dynatrace non è installato ma una libreria del prodotto è referenziata da una variabile di ambiente.
Di seguito i passi eseguiti per clonare rootvg della lpar LPAR1 in occasione della migrazione da un P6-570 ad un P7-770.
Aggiungo un disco da 50GB (hdisk27) che ospiterà il rootvg della nuova partizione , sulla vecchia si chiamerà altinst_rootvg
al termine dell’operazione.
root@lpar1:/#lspv
hdisk0 00cff683554eac45 rootvg active
hdisk1 00cff683554eac7b rootvg active
hdisk4 00cff683e9f9313f vgappl30 active
hdisk2 00cff68379f89cc7 vgappl31 active
hdisk3 00cff68379f89dbe vgappl32 active
hdisk5 00cff68379f89e28 vgappl33 active
hdisk6 00cff68379f89e74 vgappl34 active
hdisk7 00cff68379f89eb4 vgappl35 active
hdisk8 00cff68379f89ef9 vgappl36 active
hdisk9 00cff68379f89f36 vgappl30 active
hdisk10 00cff68379f89f7a vgappl31 active
hdisk11 00cff68379f89fbb vgappl32 active
hdisk12 00cff68379f89ffc vgappl33 active
hdisk13 00cff68379f8a046 vgappl34 active
hdisk14 00cff68379f8a08b vgappl35 active
hdisk15 00cff68379f8a0d1 vgappl36 active
hdisk16 00cff6837a2fb38a tempvg active
hdisk17 00cff683ad734158 tempvg active
hdisk18 00cff6837b91c30d vgappl30 active
hdisk19 00cff683d38e1716 swapvg active
hdisk20 00cff6830a99978f vgappl30 active
hdisk21 00cff6830a999885 vgappl31 active
hdisk22 00cff6830a9998f1 vgappl32 active
hdisk23 00cff6830a999958 vgappl33 active
hdisk24 00cff6830a9999c5 vgappl34 active
hdisk25 00cff6830a999a4e vgappl35 active
hdisk26 00cff6830a999ace vgappl36 active
hdisk27 00cff6830915c025 None
Notare che se rootvg è mirrored l’operazione fallirà per mancanza di spazio; rimuovere mirror prima di procedere:
root@lpar1:/#unmirrorvg rootvg hdisk1
0516-1246 rmlvcopy: If hd5 is the boot logical volume, please run ‘chpv -c <diskname>’
as root user to clear the boot record and avoid a potential boot
off an old boot image that may reside on the disk from which this
logical volume is moved/removed.
0516-1804 chvg: The quorum change takes effect immediately.
0516-1144 unmirrorvg: rootvg successfully unmirrored, user should perform
bosboot of system to reinitialize boot records. Then, user must modify
bootlist to just include: hdisk0.
Verifichiamo lo stato del mirror :
root@lpar1:/#lsvg -p rootvg
rootvg:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE DISTRIBUTION
hdisk0 active 981 588 08..00..188..196..196
hdisk1 active 981 981 197..196..196..196..196
OK , adesso rimuovo hdisk1 da rootvg :
root@lpar1:/#reducevg rootvg hdisk1
root@lpar1:/#lsvg -p rootvg
rootvg:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE DISTRIBUTION
hdisk0 active 981 588 08..00..188..196..196
Un altro problema che potrebbe impedire l’operazione è la presenza di LV con nomi di lunghezza superiore a 12 caratteri
visto che la procedura aggiungerà un prefisso al nome originale dei logical volumes.
root@lpar1:/#smitty alt_clone
Type or select values in entry fields.
Press Enter AFTER making all desired changes.
[Entry Fields]
* Target Disk(s) to install [hdisk27] +
Phase to execute all +
image.data file [] /
Exclude list [] /
Bundle to install [] +
-OR-
Fileset(s) to install []
Fix bundle to install []
-OR-
Fixes to install []
Directory or Device with images []
(required if filesets, bundles or fixes used)
installp Flags
COMMIT software updates? yes +
SAVE replaced files? no +
AUTOMATICALLY install requisite software? yes +
EXTEND file systems if space needed? yes +
OVERWRITE same or newer versions? no +
VERIFY install and check file sizes? no +
ACCEPT new license agreements? yes +
Customization script [] /
Set bootlist to boot from this disk
on next reboot? no +
Reboot when complete? no +
Verbose output? yes +
Debug output? no +
Attenzione a non selezionare la modifica della bootlist e il reboot when complete .
Selezionando l’output verboso vedremo la lista dei files che vengono copiati nel nuovo disco , inutile.
Alla fine avremo :
root@lpar1:/#lspv
hdisk0 00cff683554eac45 rootvg active
hdisk1 00cff683554eac7b None
hdisk4 00cff683e9f9313f vgappl30 active
hdisk2 00cff68379f89cc7 vgappl31 active
hdisk3 00cff68379f89dbe vgappl32 active
hdisk5 00cff68379f89e28 vgappl33 active
hdisk6 00cff68379f89e74 vgappl34 active
hdisk7 00cff68379f89eb4 vgappl35 active
hdisk8 00cff68379f89ef9 vgappl36 active
hdisk9 00cff68379f89f36 vgappl30 active
hdisk10 00cff68379f89f7a vgappl31 active
hdisk11 00cff68379f89fbb vgappl32 active
hdisk12 00cff68379f89ffc vgappl33 active
hdisk13 00cff68379f8a046 vgappl34 active
hdisk14 00cff68379f8a08b vgappl35 active
hdisk15 00cff68379f8a0d1 vgappl36 active
hdisk16 00cff6837a2fb38a tempvg active
hdisk17 00cff683ad734158 tempvg active
hdisk18 00cff6837b91c30d vgappl30 active
hdisk19 00cff683d38e1716 swapvg active
hdisk20 00cff6830a99978f vgappl30 active
hdisk21 00cff6830a999885 vgappl31 active
hdisk22 00cff6830a9998f1 vgappl32 active
hdisk23 00cff6830a999958 vgappl33 active
hdisk24 00cff6830a9999c5 vgappl34 active
hdisk25 00cff6830a999a4e vgappl35 active
hdisk26 00cff6830a999ace vgappl36 active
hdisk27 00cff6830915c025 altinst_rootvg
A questo punto abbiamo il nuovo rootvg (altinst_rootvg) , per accedervi dobbiamo usare il comando alt_rootvg_op.
Ad esempio possiamo “svegliare” il vg :
root@lpar1:/#alt_rootvg_op -W -d hdisk27
Waking up altinst_rootvg volume group …
root@lpar1:/#alt_rootvg_op -S
Putting volume group altinst_rootvg to sleep …
forced unmount of /alt_inst/var/adm/ras/livedump
forced unmount of /alt_inst/var/adm/ras/livedump
forced unmount of /alt_inst/var
forced unmount of /alt_inst/var
forced unmount of /alt_inst/usr
forced unmount of /alt_inst/usr
forced unmount of /alt_inst/tmp
forced unmount of /alt_inst/tmp
forced unmount of /alt_inst/opt/ocsinventory
forced unmount of /alt_inst/opt/ocsinventory
forced unmount of /alt_inst/opt/netbackup
forced unmount of /alt_inst/opt/netbackup
forced unmount of /alt_inst/opt/nagios
forced unmount of /alt_inst/opt/nagios
forced unmount of /alt_inst/opt
forced unmount of /alt_inst/opt
forced unmount of /alt_inst/logs
forced unmount of /alt_inst/logs
forced unmount of /alt_inst/admin
forced unmount of /alt_inst/admin
forced unmount of /alt_inst
forced unmount of /alt_inst
Fixing LV control blocks…
Fixing file system superblocks…
