{"id":852,"date":"2019-07-08T08:01:29","date_gmt":"2019-07-08T08:01:29","guid":{"rendered":"http:\/\/kapica.it\/?p=852"},"modified":"2019-07-08T08:03:00","modified_gmt":"2019-07-08T08:03:00","slug":"zmniejszenie-rozmiaru-partycji-lvm-ubuntu-server","status":"publish","type":"post","link":"http:\/\/kapica.it\/?p=852","title":{"rendered":"Zmniejszenie rozmiaru partycji LVM (Ubuntu Server)"},"content":{"rendered":"

Uwaga! Pomimo podr\u0119cznikowego wr\u0119cz dzia\u0142ania nie uda\u0142o mi si\u0119 prawid\u0142owo uruchomi\u0107 serwera ze zmniejszon\u0105 poni\u017csz\u0105 metod\u0105 partycj\u0105 root! Nie mia\u0142em czasu na dok\u0142adniejsz\u0105 analiz\u0119 problemu – mo\u017ce kiedy\u015b \ud83d\ude42<\/p>\n

1. Ogl\u0105damy struktur\u0119 dysku LVM:<\/p>\n

root@ubuntu:~# lvscan
\nACTIVE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 '\/dev\/serwer-vg\/root’ [296.41 GiB] inherit
\nACTIVE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 '\/dev\/serwer-vg\/swap_1′ [980.00 MiB] inherit<\/p>\n

2. Sprawdzamy b\u0142\u0119dy:<\/p>\n

root@ubuntu:~# e2fsck -f \/dev\/serwer-vg\/root
\ne2fsck 1.42 (29-Nov-2011)
\nPass 1: Checking inodes, blocks, and sizes
\nPass 2: Checking directory structure
\nPass 3: Checking directory connectivity
\nPass 4: Checking reference counts
\nPass 5: Checking group summary information
\n\/dev\/serwer-vg\/root: 136527\/19431424 files (0.1% non-contiguous), 2190433\/77703168 blocks<\/p>\n

3. Zmieniamy rozmiar systemu plik\u00f3w<\/p>\n

root@ubuntu:~# resize2fs -p \/dev\/serwer-vg\/root 200G
\nresize2fs 1.42 (29-Nov-2011)
\nResizing the filesystem on \/dev\/serwer-vg\/root to 52428800 (4k) blocks.
\nBegin pass 2 (max = 134263)
\nRelocating blocks\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
\nBegin pass 3 (max = 2372)
\nScanning inode table\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
\nBegin pass 4 (max = 19706)
\nUpdating inode references\u00a0\u00a0\u00a0\u00a0 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
\nThe filesystem on \/dev\/serwer-vg\/root is now 52428800 blocks long.<\/p>\n

4. Zmieniamy rozmiar parytcji LVM:<\/p>\n

root@ubuntu:~# lvresize -L 200G \/dev\/serwer-vg\/root<\/p>\n

WARNING: Reducing active logical volume to 200.00 GiB
\nTHIS MAY DESTROY YOUR DATA (filesystem etc.)
\nDo you really want to reduce root? [y\/n]: y
\nReducing logical volume root to 200.00 GiB
\nLogical volume root successfully resized<\/p>\n

5. Sprawdzamy czy zwolni\u0142o si\u0119 miejsce na dysku:<\/p>\n

root@ubuntu:~# pvscan
\nPV \/dev\/sda5\u00a0\u00a0 VG serwer-vg\u00a0\u00a0 lvm2 [297.37 GiB \/ 96.41 GiB free]
\nTotal: 1 [297.37 GiB] \/ in use: 1 [297.37 GiB] \/ in no VG: 0 [0\u00a0\u00a0 ]<\/p>\n

root@ubuntu:~# lsblk \/dev\/sda
\nNAME\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 MAJ:MIN RM\u00a0\u00a0 SIZE RO TYPE MOUNTPOINT
\nsda\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8:0\u00a0\u00a0\u00a0 0 298.1G\u00a0 0 disk
\n\u251c\u2500sda1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8:1\u00a0\u00a0\u00a0 0\u00a0\u00a0 731M\u00a0 0 part
\n\u251c\u2500sda2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8:2\u00a0\u00a0\u00a0 0\u00a0\u00a0\u00a0\u00a0 1K\u00a0 0 part
\n\u2514\u2500sda5\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 8:5\u00a0\u00a0\u00a0 0 297.4G\u00a0 0 part
\n\u251c\u2500serwer–vg-root (dm-0)\u00a0\u00a0 252:0\u00a0\u00a0\u00a0 0\u00a0\u00a0 200G\u00a0 0 lvm
\n\u2514\u2500serwer–vg-swap_1 (dm-1) 252:1\u00a0\u00a0\u00a0 0\u00a0\u00a0 980M\u00a0 0 lvm<\/p>\n

6. Ogl\u0105damy uk\u0142ad partycji LVM – widzimy, \u017ce partycje swap trzeba przenie\u015b\u0107 wcze\u015bniej:<\/p>\n

root@ubuntu:~# pvs -v –segments
\nScanning for physical volume names
\nPV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 VG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fmt\u00a0 Attr PSize\u00a0\u00a0 PFree\u00a0 Start SSize LV\u00a0\u00a0\u00a0\u00a0 Start Type\u00a0\u00a0 PE Ranges
\n\/dev\/sda5\u00a0 serwer-vg lvm2 a-\u00a0\u00a0 297.37g 96.41g\u00a0\u00a0\u00a0\u00a0 0 51200 root\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 linear \/dev\/sda5:0-51199
\n\/dev\/sda5\u00a0 serwer-vg lvm2 a-\u00a0\u00a0 297.37g 96.41g 51200 24682\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 free
\n\/dev\/sda5\u00a0 serwer-vg lvm2 a-\u00a0\u00a0 297.37g 96.41g 75882\u00a0\u00a0 245 swap_1\u00a0\u00a0\u00a0\u00a0 0 linear \/dev\/sda5:75882-76126<\/strong><\/p>\n

7. Obliczamy miejsce dla partycji swap i przenosimy. Wolumin ma 245 blok\u00f3w wi\u0119c musi rozpoczyna\u0107 si\u0119 od bloku 51200 a ko\u0144czy\u0107 na bloku 51444 (bo -1):<\/p>\n

root@ubuntu:~# pvmove –alloc anywhere -i 30 \/dev\/sda5:75882-76126 \/dev\/sda5:51200-51444
\n\/dev\/sda5: Moved: 0.0%
\n\/dev\/sda5: Moved: 44.5%
\n\/dev\/sda5: Moved: 89.4%
\n\/dev\/sda5: Moved: 100.0%<\/p>\n

8. Ogl\u0105damy zmiany, wida\u0107 wolne miejsce na ko\u0144cu woluminu:<\/p>\n

root@ubuntu:~# pvs -v –segments
\nScanning for physical volume names
\nPV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 VG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fmt\u00a0 Attr PSize\u00a0\u00a0 PFree\u00a0 Start SSize LV\u00a0\u00a0\u00a0\u00a0 Start Type\u00a0\u00a0 PE Ranges
\n\/dev\/sda5\u00a0 serwer-vg lvm2 a-\u00a0\u00a0 297.37g 96.41g\u00a0\u00a0\u00a0\u00a0 0 51200 root\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 linear \/dev\/sda5:0-51199
\n\/dev\/sda5\u00a0 serwer-vg lvm2 a-\u00a0\u00a0 297.37g 96.41g 51200\u00a0\u00a0 245 swap_1\u00a0\u00a0\u00a0\u00a0 0 linear \/dev\/sda5:51200-51444
\n\/dev\/sda5\u00a0 serwer-vg lvm2 a-\u00a0\u00a0 297.37g 96.41g 51445 24682\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 free<\/p>\n

9. Zmieniamy rozmiar kontenera LVM:<\/p>\n

root@ubuntu:~# pvresize -v \/dev\/sda5 –setphysicalvolumesize 200G
\nUsing physical volume(s) on command line
\nArchiving volume group „serwer-vg” metadata (seqno 13).
\n\/dev\/sda5: Pretending size is 419430400 not 623638528 sectors.
\nResizing physical volume \/dev\/sda5 from 76127 to 51199 extents.
\n\/dev\/sda5: cannot resize to 51199 extents as 51445 are allocated<\/strong>.
\n0 physical volume(s) resized \/ 1 physical volume(s) not resized<\/p>\n

Nie zadzia\u0142a\u0142o dla warto\u015bci 200G – musimy dok\u0142adniej obliczy\u0107 potrzebne miejsce z warto\u015bci 51445 (51445*4+1)<\/p>\n

root@ubuntu:~# pvresize -v \/dev\/sda5 –setphysicalvolumesize 206217M
\nUsing physical volume(s) on command line
\nArchiving volume group „serwer-vg” metadata (seqno 13).
\n\/dev\/sda5: Pretending size is 422332416 not 623638528 sectors.
\nResizing physical volume \/dev\/sda5 from 76127 to 51554 extents.
\nResizing volume „\/dev\/sda5” to 422330368 sectors.
\nUpdating physical volume „\/dev\/sda5”
\nCreating volume group backup „\/etc\/lvm\/backup\/serwer-vg” (seqno 14).
\nPhysical volume „\/dev\/sda5” changed
\n1 physical volume(s) resized \/ 0 physical volume(s) not resized<\/p>\n

10. Ogl\u0105damy zmiany:<\/p>\n

root@ubuntu:~# pvscan
\nPV \/dev\/sda5\u00a0\u00a0 VG serwer-vg\u00a0\u00a0 lvm2 [201.38 GiB \/ 436.00 MiB free]
\nTotal: 1 [201.38 GiB] \/ in use: 1 [201.38 GiB] \/ in no VG: 0 [0\u00a0\u00a0 ]<\/p>\n

11. Obliczamy pojemno\u015b\u0107 woluminu dla fdisk w sektorach (422330368+8192-1= -> do wpisania w fdisk)<\/p>\n

root@ubuntu:~# pvs -v –unit s
\nScanning for physical volume names
\nPV\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 VG\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Fmt\u00a0 Attr PSize\u00a0\u00a0\u00a0\u00a0\u00a0 PFree\u00a0\u00a0 DevSize\u00a0\u00a0\u00a0 PV UUID
\n\/dev\/sda5\u00a0 serwer-vg lvm2 a-\u00a0\u00a0 422330368<\/strong>S 892928S 623640576S IKRmdG-jqWB-5d4u-Wo3Q-Exb0-ATQp-brGGoS<\/p>\n

12. Uruchamiamy program fdisk i zmieniamy rozmiar partycji rozszerzonej, przechowuj\u0105cej LVM (u mnie jest to partycja sda2 na kt\u00f3rej jest wirtualna sda5)<\/p>\n

root@ubuntu:~# fdisk \/dev\/sda<\/p>\n

Command (m for help): d
\nPartition number (1-5): 2<\/p>\n

Command (m for help): n
\nPartition type:
\np\u00a0\u00a0 primary (1 primary, 0 extended, 3 free)
\ne\u00a0\u00a0 extended
\nSelect (default p):
\nUsing default response p
\nPartition number (1-4, default 2):
\nUsing default value 2
\nFirst sector (1499136-625142447, default 1499136):
\nUsing default value 1499136
\nLast sector, +sectors or +size{K,M,G} (1499136-625142447, default 625142447): +422338559<\/strong><\/p>\n

Command (m for help): w
\nThe partition table has been altered!<\/p>\n

Calling ioctl() to re-read partition table.<\/p>\n

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
\nThe kernel still uses the old table. The new table will be used at
\nthe next reboot or after you run partprobe(8) or kpartx(8)
\nSyncing disks.<\/p>\n

13. Restartujemy system (i niestety nie rusza… ale partycje s\u0105 prawid\u0142owo zmodyfikowane)<\/p>\n

root@ubuntu:~# reboot<\/p>\n

W wolnej chwili ustal\u0119 dlaczego system nie wstaje.<\/p>\n

Polecam artyku\u0142 https:\/\/morfikov.github.io\/post\/zmiana-rozmiaru-lvm\/<\/p>\n","protected":false},"excerpt":{"rendered":"

Uwaga! Pomimo podr\u0119cznikowego wr\u0119cz dzia\u0142ania nie uda\u0142o mi si\u0119 prawid\u0142owo uruchomi\u0107 serwera ze zmniejszon\u0105 poni\u017csz\u0105 metod\u0105 partycj\u0105 root! Nie mia\u0142em czasu na dok\u0142adniejsz\u0105 analiz\u0119 problemu – mo\u017ce kiedy\u015b \ud83d\ude42 1. Ogl\u0105damy struktur\u0119 dysku LVM: root@ubuntu:~# lvscan ACTIVE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 '\/dev\/serwer-vg\/root’ [296.41 GiB] inherit ACTIVE\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 '\/dev\/serwer-vg\/swap_1′ [980.00 MiB] inherit 2. Sprawdzamy b\u0142\u0119dy: root@ubuntu:~# e2fsck -f \/dev\/serwer-vg\/root e2fsck 1.42…<\/p>\n","protected":false},"author":1,"featured_media":853,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[4,2],"tags":[140,141,116,142],"_links":{"self":[{"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/posts\/852"}],"collection":[{"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/kapica.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=852"}],"version-history":[{"count":2,"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/posts\/852\/revisions"}],"predecessor-version":[{"id":855,"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/posts\/852\/revisions\/855"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/kapica.it\/index.php?rest_route=\/wp\/v2\/media\/853"}],"wp:attachment":[{"href":"http:\/\/kapica.it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/kapica.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=852"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/kapica.it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}