ããŸããŸãªè² è·ãæã€ãããžã§ã¯ã㧠Ceph ããããã¯ãŒã¯ ã¹ãã¬ãŒãžãšããŠäœ¿çšãããšãäžèŠåçŽãŸãã¯äºçŽ°ãšã¯æããªãããŸããŸãªã¿ã¹ã¯ã«ééããããšããããŸãã äŸãã°ïŒ
- æ°ããã¯ã©ã¹ã¿ãŒå ã®ä»¥åã®ãµãŒããŒãéšåçã«äœ¿çšããŠãå€ã Ceph ããæ°ãã Ceph ã«ããŒã¿ã移è¡ããŸãã
- Ceph ã§ã®ãã£ã¹ã¯é åå²ãåœãŠã®åé¡ã®è§£æ±ºçã
ãã®ãããªåé¡ã«å¯ŸåŠããããã«ãããŒã¿ã倱ããã« OSD ãæ£ããåé€ããå¿ èŠããããŸããããã¯ã倧éã®ããŒã¿ãæ±ãå Žåã«ç¹ã«éèŠã§ãã ããã«ã€ããŠã¯ãã®èšäºã§èª¬æããŸãã
以äžã§èª¬æããã¡ãœããã¯ãCeph ã®ã©ã®ããŒãžã§ã³ã«ãåœãŠã¯ãŸããŸãã ããã«ãCeph ã倧éã®ããŒã¿ãä¿åã§ãããšããäºå®ãèæ
®ãããŸããããŒã¿æ倱ããã®ä»ã®åé¡ãé²ãããã«ãäžéšã®ã¢ã¯ã·ã§ã³ã¯ä»ã®ããã€ãã®ã¢ã¯ã·ã§ã³ã«ãåå²ããããŸãã
OSDã«ã€ããŠã®åºæ
説æãã XNUMX ã€ã®ã¬ã·ãã®ãã¡ XNUMX ã€ã¯ OSD å°çšã§ãããã (
ãŸã第äžã«ãCeph ã¯ã©ã¹ã¿ãŒå šäœã¯å€ãã® OSD ã§æ§æãããŠãããšããããšãèšã£ãŠãããªããã°ãªããŸããã æ°ãå€ãã»ã©ãCeph ã®ç©ºãããŒã¿éãå¢å ããŸãã ããããã ãšããããããã§ãã ã¡ã€ã³OSDæ©èœ: Ceph ãªããžã§ã¯ã ããŒã¿ããã¹ãŠã®ã¯ã©ã¹ã¿ãŒ ããŒãã®ãã¡ã€ã« ã·ã¹ãã ã«ä¿åãããã®ããŒã¿ãžã®ãããã¯ãŒã¯ ã¢ã¯ã»ã¹ (èªã¿åããæžã蟌ã¿ããã®ä»ã®ãªã¯ãšã¹ãçš) ãæäŸããŸãã
åãã¬ãã«ã§ã¯ãç°ãªã OSD éã§ãªããžã§ã¯ããã³ããŒããããšã«ãã£ãŠãã¬ããªã±ãŒã·ã§ã³ ãã©ã¡ãŒã¿ãèšå®ãããŸãã ããã§ããŸããŸãªåé¡ãçºçããå¯èœæ§ãããããã®è§£æ±ºçã«ã€ããŠã¯ä»¥äžã§èª¬æããŸãã
ã±ãŒã¹No.1ã ããŒã¿ã倱ããã« Ceph ã¯ã©ã¹ã¿ãŒãã OSD ãå®å šã«åé€ããŸã
OSD ãåé€ããå¿ èŠãããã®ã¯ãã¯ã©ã¹ã¿ãŒãããµãŒããŒãåé€ãã (ããšãã°ããµãŒããŒãå¥ã®ãµãŒããŒã«çœ®ãæãã) ããšã«ãã£ãŠçºçããå¯èœæ§ããããŸãããããç§ãã¡ã®èº«ã«èµ·ããããã®èšäºãæžããã£ããã«ãªããŸããã ãããã£ãŠãæäœã®æçµç®æšã¯ãç¹å®ã®ãµãŒããŒäžã®ãã¹ãŠã® OSD ãš mons ãæœåºããŠããµãŒããŒãåæ¢ã§ããããã«ããããšã§ãã
䟿å®äžããŸãã³ãã³ãã®å®è¡äžã«å¿
èŠãª OSD ã®æå®ãééããç¶æ³ãé¿ããããã«ãåé€ãã OSD ã®çªå·ãšãªãå€ãå¥ã®å€æ°ã«èšå®ããŸãã 圌女ã«é»è©±ããŸããã ${ID}
â ãããšä»¥äžã§ã¯ããã®ãããªå€æ°ã¯ãäœæ¥ããŠãã OSD ã®çªå·ã眮ãæããŸãã
äœæ¥ãéå§ããåã®ç¶æ ãèŠãŠã¿ãŸãããã
root@hv-1 ~ # ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 0.46857 root default
-3 0.15619 host hv-1
-5 0.15619 host hv-2
1 ssd 0.15619 osd.1 up 1.00000 1.00000
-7 0.15619 host hv-3
2 ssd 0.15619 osd.2 up 1.00000 1.00000
OSD ã®åé€ãéå§ããã«ã¯ã次ã®æé ãã¹ã ãŒãºã«å®è¡ããå¿
èŠããããŸãã reweight
ããããŒãã«ããŸãã ãã®ããã«ããŠãä»ã® OSD ãšã®ãã©ã³ã¹ããšãããšã§ãOSD å
ã®ããŒã¿éãåæžããŸãã ãããè¡ãã«ã¯ã次ã®ã³ãã³ããå®è¡ããŸãã
ceph osd reweight osd.${ID} 0.98
ceph osd reweight osd.${ID} 0.88
ceph osd reweight osd.${ID} 0.78
...ãããŠãŒãã«ãªããŸã§ç¶ããŸãã
ã¹ã ãŒãºãªãã©ã³ã¹èª¿æŽãå¿
èŠããŒã¿ã倱ããªãããã«ã ããã¯ãOSD ã«å€§éã®ããŒã¿ãå«ãŸããŠããå Žåã«ç¹ã«åœãŠã¯ãŸããŸãã ã³ãã³ãã®å®è¡åŸã«ããã確èªããã«ã¯ reweight
ãã¹ãŠããŸããããŸãããå®äºã§ããŸã ceph -s
ãŸãã¯å¥ã®ã¿ãŒããã«ãŠã£ã³ããŠã§å®è¡ããŸã ceph -w
ãªã¢ã«ã¿ã€ã ã§å€åã芳å¯ããããã
OSD ãã空ãã«ãªã£ãããæšæºæäœãç¶è¡ã㊠OSD ãåé€ã§ããŸãã ãããè¡ãã«ã¯ãç®çã® OSD ãç¶æ
ã«è»¢éããŸãã down
:
ceph osd down osd.${ID}
OSD ãã¯ã©ã¹ã¿ãŒãããåŒãåºãããŠã¿ãŸãããã
ceph osd out osd.${ID}
OSD ãµãŒãã¹ãåæ¢ããFS å ã®ãã®ããŒãã£ã·ã§ã³ãã¢ã³ããŠã³ãããŸãããã
systemctl stop ceph-osd@${ID}
umount /var/lib/ceph/osd/ceph-${ID}
OSDãããåé€ããŸã
ceph osd crush remove osd.${ID}
OSD ãŠãŒã¶ãŒãåé€ããŸãããã
ceph auth del osd.${ID}
æåŸã«ãOSD èªäœãåé€ããŸãããã
ceph osd rm osd.${ID}
泚æ: Ceph Luminous ããŒãžã§ã³ä»¥éã䜿çšããŠããå Žåãäžèšã® OSD åé€æé 㯠XNUMX ã€ã®ã³ãã³ãã«æžããããšãã§ããŸãã
ceph osd out osd.${ID}
ceph osd purge osd.${ID}
äžèšã®æé ãå®äºããåŸã次ã®ã³ãã³ããå®è¡ãããšã ceph osd tree
ã®å Žåãäœæ¥ãå®è¡ããããµãŒããŒã«ã¯ãäžèšã®æäœãå®è¡ããã OSD ãååšããªãããšãæããã§ãã
root@hv-1 ~ # ceph osd tree
ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
-1 0.46857 root default
-3 0.15619 host hv-1
-5 0.15619 host hv-2
-7 0.15619 host hv-3
2 ssd 0.15619 osd.2 up 1.00000 1.00000
éäžã§ãCeph ã¯ã©ã¹ã¿ãŒã®ç¶æ
ã次ã®ããã«å€åããããšã«æ³šæããŠãã ããã HEALTH_WARN
ãŸããOSD ã®æ°ãšå©çšå¯èœãªãã£ã¹ã¯å®¹éãæžå°ããŸãã
以äžã§ã¯ããµãŒããŒãå®å šã«åæ¢ããããã«å¿ã㊠Ceph ããåé€ããå Žåã«å¿ èŠãªæé ã«ã€ããŠèª¬æããŸãã ãã®å Žåã次ã®ããšãèŠããŠããããšãéèŠã§ãã ãµãŒããŒãã·ã£ããããŠã³ããåã«ããã¹ãŠã® OSD ãåé€ããå¿ èŠããããŸã ãã®ãµãŒããŒäžã§ã
ãã®ãµãŒããŒã« OSD ãããæ®ã£ãŠããªãå Žåã¯ãããããåé€ããåŸãOSD ããããããµãŒããŒãé€å€ããå¿
èŠããããŸãã hv-2
次ã®ã³ãã³ããå®è¡ããŸãã
ceph osd crush rm hv-2
æ¶å» mon
ãµãŒããŒãã hv-2
å¥ã®ãµãŒã㌠(ã€ãŸãããã®å Žå㯠hv-1
):
ceph-deploy mon destroy hv-2
ãã®åŸããµãŒããŒãåæ¢ãããã®åŸã®ã¢ã¯ã·ã§ã³ (ãµãŒããŒã®åãããã€ãªã©) ãéå§ã§ããŸãã
ã±ãŒã¹No.2ã äœææžã¿ã® Ceph ã¯ã©ã¹ã¿ãŒå ã®ãã£ã¹ã¯å®¹éã®é å
第äºè©±ã¯PGã«ã€ããŠã®å眮ãããå§ããŸã(
ã€ãŸããCeph ã䜿çšãããšãã«ããããåé¡ã® XNUMX ã€ã¯ãCeph ã®ããŒã«é㧠OSD ãš PG ã®æ°ãäžåè¡¡ã§ããããšã§ãã
ãŸãããã®ãããå°ããªããŒã«ã«æå®ãããŠãã PG ãå€ãããç¶æ³ãçºçããå¯èœæ§ããããããã¯æ¬è³ªçã«ã¯ã©ã¹ã¿ãŒå
ã®ãã£ã¹ã¯é åãäžåçã«äœ¿çšããããšã«ãªããŸãã 第 XNUMX ã«ãå®éã«ã¯ãOSD ã® XNUMX ã€ã§ã®ããŒã¿ ãªãŒããŒãããŒãšãããããæ·±å»ãªåé¡ããããŸãã ããã«ãããã¯ã©ã¹ã¿ãŒã¯æåã«æ¬¡ã®ç¶æ
ã«ç§»è¡ããŸãã HEALTH_WARN
ãã®åŸ HEALTH_ERR
ã ãã®çç±ã¯ãCeph ãå©çšå¯èœãªããŒã¿ã®éãèšç®ãããšãã« (次ã®ããã«ããŠèª¿ã¹ãããšãã§ããŸã) ããã§ãã MAX AVAIL
ã³ãã³ãåºå㧠ceph df
ããŒã«ããšã«åå¥ã«) ã¯ãOSD ã§äœ¿çšå¯èœãªããŒã¿ã®éã«åºã¥ããŸãã å°ãªããšã XNUMX ã€ã® OSD ã«ååãªã¹ããŒã¹ããªãå ŽåãããŒã¿ããã¹ãŠã® OSD ã«é©åã«åæ£ããããŸã§ããã以äžããŒã¿ãæžã蟌ãããšã¯ã§ããŸããã
ãããã®åé¡ã«ã€ããŠã¯æ確ã«ãã䟡å€ããããŸãã 倧éšå㯠Ceph ã¯ã©ã¹ã¿ãŒã®æ§æ段éã§æ±ºå®ãããŸãã 䜿çšã§ããããŒã«ã® XNUMX ã€ã¯ã
ããã§ã次ã®å³ãæ³åããŠã¿ãŸããããã¯ã©ã¹ã¿ãŒã«ã¯ã¹ããŒã¿ã¹ããããŸãã HEALTH_WARN
OSD ã® XNUMX ã€ãã¹ããŒã¹äžè¶³ã«ãªã£ãŠããããã§ãã ããã¯ãšã©ãŒã«ãã£ãŠç€ºãããŸã HEALTH_WARN: 1 near full osd
ã 以äžã¯ããã®ç¶æ³ããæãåºãããã®ã¢ã«ãŽãªãºã ã§ãã
ãŸãæåã«ãæ®ãã® OSD éã§å©çšå¯èœãªããŒã¿ãåæ£ããå¿
èŠããããŸãã æåã®ã±ãŒã¹ã§ããŒããããã¬ã€ã³ããããšãã«åæ§ã®æäœããã§ã«å®è¡ããŸããããå¯äžã®éãã¯ããããã«æžããå¿
èŠãããããšã§ãã reweight
ã ããšãã°ã0.95 ãŸã§:
ceph osd reweight osd.${ID} 0.95
ããã«ãããOSD å ã®ãã£ã¹ã¯é åã解æŸãããceph ãã«ã¹ã®ãšã©ãŒãä¿®æ£ãããŸãã ãã ãããã§ã«è¿°ã¹ãããã«ããã®åé¡ã¯äž»ã«åæ段éã§ã® Ceph ã®æ§æãæ£ãããªãããã«çºçããŸããå°æ¥ãã®åé¡ãçºçããªãããã«åæ§æãè¡ãããšãéåžžã«éèŠã§ãã
ç§ãã¡ã®ç¹å¥ãªã±ãŒã¹ã§ã¯ãæçµçã«ã¯æ¬¡ã®ããã«ãªããŸãã
- å€ãé«ããã
replication_count
ããŒã«ã®äžã€ã§ã - ããããŒã«ã§ã¯ PG ãå€ãããŸãããå¥ã®ããŒã«ã§ã¯ PG ãå°ãªãããŸãã
ãã§ã«è¿°ã¹ãèšç®æ©ã䜿çšããŠã¿ãŸãããã å ¥åããå¿ èŠãããå 容ãæ確ã«ç€ºãããŠãããååãšããŠè€éãªããšã¯äœããããŸããã å¿ èŠãªãã©ã¡ãŒã¿ãèšå®ãããšã次ã®æšå¥šäºé ãåŸãããŸãã
泚æ: Ceph ã¯ã©ã¹ã¿ãŒãæåããã»ããã¢ããããå Žåãèšç®æ©ã®ãã XNUMX ã€ã®äŸ¿å©ãªæ©èœã¯ãè¡šã§æå®ããããã©ã¡ãŒã¿ãŒã䜿çšããŠããŒã«ãæåããäœæããã³ãã³ãã®çæã§ãã
æåŸã®åã¯ããã²ãŒãã«åœ¹ç«ã¡ãŸã - æšå¥šãããPGæ°ã ãã®äŸã§ã¯ãã¬ããªã±ãŒã·ã§ã³ä¹æ°ãå€æŽããããšã«ãããããã¬ããªã±ãŒã·ã§ã³ ãã©ã¡ãŒã¿ãŒã瀺ãããŠãã XNUMX çªç®ã®ãªãã·ã§ã³ã圹ã«ç«ã¡ãŸãã
ãããã£ãŠãæåã«ã¬ããªã±ãŒã·ã§ã³ ãã©ã¡ãŒã¿ãå€æŽããå¿ èŠããããŸããä¹æ°ãæžããããšã§ãã£ã¹ã¯é åã解æŸã§ãããããããã¯æåã«å®è¡ãã䟡å€ããããŸãã ã³ãã³ããå®è¡ãããšã䜿çšå¯èœãªãã£ã¹ã¯å®¹éãå¢å ããããšãããããŸãã
ceph osd pool $pool_name set $replication_size
ãããŠå®äºãããããã©ã¡ãŒã¿å€ãå€æŽããŸã pg_num
О pgp_num
次ã®ããã«ããŸãã
ceph osd pool set $pool_name pg_num $pg_number
ceph osd pool set $pool_name pgp_num $pg_number
ãããéèŠã : åããŒã«ã§ PG ã®æ°ãé çªã«å€æŽããå¿ èŠããããèŠåãæ¶ãããŸã§ä»ã®ããŒã«ã®å€ãå€æŽããªãã§ãã ããã ãããŒã¿åé·æ§ã®äœäžã О ãn åã®ããŒãžãå£åããŸããã.
ã³ãã³ãåºåã䜿çšããŠããã¹ãŠãããŸããã£ãããšã確èªããããšãã§ããŸãã ceph health detail
О ceph -s
.
ã±ãŒã¹No.3ã LVM ãã Ceph RBD ãžã®ä»®æ³ãã·ã³ã®ç§»è¡
ã¬ã³ã¿ã«ãããã¢ã¡ã¿ã« ãµãŒããŒã«ã€ã³ã¹ããŒã«ãããä»®æ³ãã·ã³ããããžã§ã¯ãã§äœ¿çšããç¶æ³ã§ã¯ããã©ãŒã«ã ãã¬ã©ã³ã ã¹ãã¬ãŒãžã®åé¡ãããçºçããŸãã ãã®ã¹ãã¬ãŒãžã«ååãªã¹ããŒã¹ãããããšãéåžžã«æãŸããã§ã...ãã XNUMX ã€ã®ããããç¶æ³: ãµãŒããŒäžã«ããŒã«ã« ã¹ãã¬ãŒãžãæã€ä»®æ³ãã·ã³ãããããã£ã¹ã¯ãæ¡åŒµããå¿ èŠããããŸããããã£ã¹ã¯ããªããããã©ãã«ãè¡ãããšãã§ããŸããããµãŒããŒäžã«æ®ã£ãŠãã空ããã£ã¹ã¯å®¹éã
ãã®åé¡ã¯ããŸããŸãªæ¹æ³ã§è§£æ±ºã§ããŸããããšãã°ãå¥ã®ãµãŒã㌠(ååšããå Žå) ã«ç§»è¡ãããããµãŒããŒã«æ°ãããã£ã¹ã¯ãè¿œå ããŸãã ãã ãããããåžžã«å¯èœã§ãããšã¯éããŸããããã®ãããLVM ãã Ceph ãžã®ç§»è¡ã¯ããã®åé¡ã«å¯Ÿããåªãã解決çãšãªãå¯èœæ§ããããŸãã ãã®ãªãã·ã§ã³ãéžæãããšãããŒã«ã« ã¹ãã¬ãŒãžããããã€ããŒãã€ã¶ãŒããå¥ã®ãã€ããŒãã€ã¶ãŒã«ç§»åããå¿ èŠããªããªãããããµãŒããŒéã®ç§»è¡ããã»ã¹ãç°¡çŽ åãããŸãã å¯äžã®åé¡ã¯ãäœæ¥ã®å®è¡äžã« VM ãåæ¢ããå¿ èŠãããããšã§ãã
以äžã®ã¬ã·ãã¯ä»¥äžããåŒçšããŸãã
å®è·µçãªéšåã«ç§»ããŸãããã ãã®äŸã§ã¯ãvirsh ã䜿çšããããã«å¿ã㊠libvirt ã䜿çšããŸãã ãŸããããŒã¿ã®ç§»è¡å ãšãªã Ceph ããŒã«ã libvirt ã«æ¥ç¶ãããŠããããšã確èªããŸãã
virsh pool-dumpxml $ceph_pool
ããŒã«ã®èª¬æã«ã¯ãèªèšŒããŒã¿ãå«ã Ceph ãžã®æ¥ç¶ããŒã¿ãå«ãŸããŠããå¿ èŠããããŸãã
次ã®ã¹ãããã§ã¯ãLVM ã€ã¡ãŒãžã Ceph RBD ã«å€æãããŸãã å®è¡æéã¯äž»ã«ç»åã®ãµã€ãºã«ãã£ãŠç°ãªããŸãã
qemu-img convert -p -O rbd /dev/main/$vm_image_name rbd:$ceph_pool/$vm_image_name
å€æåŸãLVM ã€ã¡ãŒãžãæ®ããŸããããã¯ãVM ã® RBD ãžã®ç§»è¡ã倱æããå€æŽãããŒã«ããã¯ããå¿ èŠãããå Žåã«åœ¹ç«ã¡ãŸãã ãŸããå€æŽãããã«ããŒã«ããã¯ã§ããããã«ãä»®æ³ãã·ã³æ§æãã¡ã€ã«ã®ããã¯ã¢ãããäœæããŸãããã
virsh dumpxml $vm_name > $vm_name.xml
cp $vm_name.xml $vm_name_backup.xml
...ãããŠãªãªãžãã«ãç·šéããŠãã ãã(vm_name.xml
ïŒã ãã£ã¹ã¯ã®èª¬æãå«ãŸãããããã¯ãèŠã€ããŠã¿ãŸããã (次ã®è¡ã§å§ãŸããŸã) <disk type='file' device='disk'>
ãããŠæ¬¡ã§çµãããŸã </disk>
) ã次ã®åœ¢åŒã«çž®å°ããŸãã
<disk type='network' device='disk'>
<driver name='qemu'/>
<auth username='libvirt'>
<secret type='ceph' uuid='sec-ret-uu-id'/>
</auth>
<source protocol='rbd' name='$ceph_pool/$vm_image_name>
<host name='10.0.0.1' port='6789'/>
<host name='10.0.0.2' port='6789'/>
</source>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</disk>
ããã€ãã®è©³çŽ°ãèŠãŠã¿ãŸããã:
- ãããã³ã«ãž
source
Ceph RBD äžã®ã¹ãã¬ãŒãžãžã®ã¢ãã¬ã¹ã瀺ãããŸã (ããã¯æåã®æ®µéã§æ±ºå®ããã Ceph ããŒã«ãš RBD ã€ã¡ãŒãžã®ååã瀺ãã¢ãã¬ã¹ã§ã)ã - ãããã¯å
secret
ã¿ã€ãã瀺ãããŠããŸãceph
ãããã³ããã«æ¥ç¶ããããã®ã·ãŒã¯ã¬ããã® UUIDã ãã® uuid ã¯ã次ã®ã³ãã³ãã䜿çšããŠèŠã€ããããšãã§ããŸããvirsh secret-list
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host
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