I started making some notes on how EBS volume creation can be tracked and troubleshot in Eucalyptus (Eucalyptus 3.X + btw). I figured this would make a good blog post, so I’ve just dumped all the information into here and I’ll let Google do the rest 😉 I’ll update it as I go along and provide more hints in the troubleshooting section, this will also make it into the Eucalyptus Knowledge Base, albeit in different form and smaller chunks. I hope this is useful to some.
Creating & Managing Elastic Block Storage (EBS) Volumes
The Volume Creation Process
# euca-create-volume -z eucalyptus -s 5
# ls -lsrth /var/lib/eucalyptus/volumes/
total 1.1M
1.1M -rw-r–r– 1 root root 5.1G Jan 23 08:57 vol-391D44BE
# losetup -a
/dev/loop0: [fd00]:394108 (//var/lib/eucalyptus/volumes/vol-391D44BE)
# pvdisplay
— Physical volume —
PV Name /dev/loop0
VG Name vg-1lS3pg..
PV Size 5.00 GB / not usable 4.00 MB
Allocatable yes (but full)
PE Size (KByte) 4096
Free PE 0
Allocated PE 1280
PV UUID u8vTQh-pEhU-9ID2-ewEO-kOIh-iwQx-Kb7BrZ
# vgdisplay
— Volume group —
VG Name vg-1lS3pg..
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 2
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 1
Act PV 1
VG Size 5.00 GB
PE Size 4.00 MB
Total PE 1280
Alloc PE / Size 1280 / 5.00 GB
Free PE / Size 0 / 0
VG UUID eMYWz3-DkhN-IM9I-8T6j-cbnI-vAJe-H9OJgh
Total PE 1280
# lvdisplay
— Logical volume —
LV Name /dev/vg-1lS3pg../lv-28NzTQ..
VG Name vg-1lS3pg..
LV UUID Goyv51-3WRJ-GOiq-yrjU-osw8-efqF-UGQt60
LV Write Access read/write
LV Status available
# open 1
LV Size 5.00 GB
Current LE 1280
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 256
Block device 253:3
# tgt-admin -s
Target 4: iqn.2009-06.com.eucalyptus.eucalyptus:store4
System information:
Driver: iscsi
State: ready
I_T nexus information:
LUN information:
LUN: 0
Type: controller
SCSI ID: IET 00040000
SCSI SN: beaf40
Size: 0 MB, Block size: 1
Online: Yes
Removable media: No
Readonly: No
Backing store type: null
Backing store path: None
Backing store flags:
LUN: 1
Type: disk
SCSI ID: IET 00040001
SCSI SN: beaf41
Size: 5369 MB, Block size: 512
Online: Yes
Removable media: No
Readonly: No
Backing store type: rdwr
Backing store path: /dev/vg-1lS3pg../lv-28NzTQ..
Backing store flags:
Account information:
eucalyptus
ACL information:
ALL
Attaching Volumes to Instances
# euca-describe-volumes
# euca-attach-volume -i i-133F3E53 -d /dev/sdb1 vol-391D44BE
# iscsiadm -m discovery -t sendtargets -p 172.22.0.13
172.22.0.13:3260,1 iqn.2009-06.com.eucalyptus.eucalyptus:store4
Jan 23 11:03:31 Pod-04 kernel: scsi3 : iSCSI Initiator over TCP/IP
Jan 23 11:03:32 Pod-04 kernel: Vendor: IET Model: Controller Rev: 0001
Jan 23 11:03:32 Pod-04 kernel: Type: RAID ANSI SCSI revision: 05
Jan 23 11:03:32 Pod-04 kernel: scsi 3:0:0:0: Attached scsi generic sg5 type 12
Jan 23 11:03:32 Pod-04 kernel: Vendor: IET Model: VIRTUAL-DISK Rev: 0001
Jan 23 11:03:32 Pod-04 kernel: Type: Direct-Access ANSI SCSI revision: 05
Jan 23 11:03:32 Pod-04 kernel: SCSI device sdd: 10485760 512-byte hdwr sectors (5369 MB)
Jan 23 11:03:32 Pod-04 kernel: sdd: Write Protect is off
Jan 23 11:03:32 Pod-04 kernel: SCSI device sdd: drive cache: write back
Jan 23 11:03:32 Pod-04 kernel: SCSI device sdd: 10485760 512-byte hdwr sectors (5369 MB)
Jan 23 11:03:32 Pod-04 kernel: sdd: Write Protect is off
Jan 23 11:03:32 Pod-04 kernel: SCSI device sdd: drive cache: write back
Jan 23 11:03:32 Pod-04 kernel: sdd: unknown partition table
Jan 23 11:03:32 Pod-04 kernel: sd 3:0:0:1: Attached scsi disk sdd
Jan 23 11:03:32 Pod-04 kernel: sd 3:0:0:1: Attached scsi generic sg6 type 0
Jan 23 11:03:33 Pod-04 kernel: peth0: received packet with own address as source address
Jan 23 11:03:33 Pod-04 kernel: peth0: received packet with own address as source address
Jan 23 11:03:33 Pod-04 iscsid: Connection2:0 to [target: iqn.2009-06.com.eucalyptus.eucalyptus:store4, portal: 172.22.0.13,3260] through [iface: default] is operational now
Disk /dev/sdd: 5368 MB, 5368709120 bytes
166 heads, 62 sectors/track, 1018 cylinders
Units = cylinders of 10292 * 512 = 5269504 bytes
Disk /dev/sdd doesn’t contain a valid partition table
[root@Pod-04 i-133F3E53]# pwd
/var/lib/eucalyptus/instances/work/CEK7XDHLEBSVR1SATAZMT/i-133F3E53
[root@Pod-04 i-133F3E53]# ll vol*
-rw-rw—- 1 eucalyptus eucalyptus 535 Jan 23 11:03 vol-391D44BE.xml
<?xml version=”1.0″ encoding=”UTF-8″?>
<volume>
<hypervisor type=”xen” capability=”xen+hw” bitness=”64″/>
<id>vol-391D44BE</id>
<user>CEK7XDHLEBSVR1SATAZMT</user>
<instancePath>/var/lib/eucalyptus/instances/work/CEK7XDHLEBSVR1SATAZMT/i-133F3E53</instancePath>
<os platform=”linux” virtioRoot=”false” virtioDisk=”false” virtioNetwork=”false”/>
<backing>
<root type=”image”/>
</backing>
<diskPath targetDeviceType=”disk” targetDeviceName=”sdb2″ targetDeviceBus=”scsi” sourceType=”block”>/dev/sdd</diskPath>
</volume>
virsh attach-device <domain> <file>
virsh dumpxml <domain_id>
<disk type=’block’ device=’disk’>
<driver name=’phy’/>
<source dev=’/dev/sdd’/>
<target dev=’sdb2′ bus=’scsi’/>
</disk>
Disk /dev/sdb2: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000
Disk /dev/sdb2 doesn’t contain a valid partition table
# mkfs.ext3 /dev/sdb2
# mkdir /media/data
# mount /dev/sdb2 /media/data
Detaching Volumes
euca-detach-volume -i i133F3E53 vol-391D44BE
virsh detach-device <domain> <file>
Snapshotting Volumes
euca-create-snapshot <volume_id>
[root@Pod-03 lester]# euca-describe-snapshots
SNAPSHOT snap-C2DF3CF2 vol-D02E43C2 pending 2012-01-30T15:44:04.853Z 0% None
[root@Pod-03 lester]# ll /var/lib/eucalyptus/volumes/
total 17015932
-rw-r–r– 1 root root 8589934592 Jan 30 07:32 snap-26EE3E3A
-rw-r–r– 1 root root 3224145920 Jan 30 07:44 snap-C2DF3CF2
-rw-r–r– 1 root root 5368709120 Jan 30 06:49 snap-D7E53AC0
-rw-r–r– 1 root root 10741612544 Jan 20 09:56 vol-178C3E9C
-rw-r–r– 1 root root 5372903424 Jan 23 08:57 vol-391D44BE
-rw-r–r– 1 root root 16110321664 Jan 30 07:43 vol-D02E43C2
-rw-r–r– 1 root root 8053063680 Jan 30 07:44 vol-D02E43C2MsmGAIzx
[root@Pod-03 volumes]# losetup -a
/dev/loop0: [fd00]:393652 (//var/lib/eucalyptus/volumes/vol-178C3E9C)
/dev/loop1: [fd00]:394108 (//var/lib/eucalyptus/volumes/vol-391D44BE)
/dev/loop2: [fd00]:393631 (//var/lib/eucalyptus/volumes/vol-D02E43C2)
/dev/loop3: [fd00]:394121 (//var/lib/eucalyptus/volumes/vol-D02E43C2MsmGAIzx)
[root@Pod-03 volumes]# vgdisplay
— Volume group —
VG Name vg-WsNskQ..
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 22.50 GB
PE Size 4.00 MB
Total PE 5759
Alloc PE / Size 5759 / 22.50 GB
Free PE / Size 0 / 0
VG UUID Dh0Xs7-Pvlr-vUbm-d1mA-7pCf-I94z-dS3r0l
[root@Pod-03 volumes]# lvdisplay
— Logical volume —
LV Name /dev/vg-WsNskQ../lv-OWzOIQ..
VG Name vg-WsNskQ..
LV UUID JFyFII-F1K8-QGYD-0s77-1dZf-ALQm-33AOr9
LV Write Access read/write
LV snapshot status source of
/dev/vg-WsNskQ../lv-snap-CfzmRA.. [active]
LV Status available
# open 1
LV Size 15.00 GB
Current LE 3840
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 256
Block device 253:4— Logical volume —
LV Name /dev/vg-WsNskQ../lv-snap-CfzmRA..
VG Name vg-WsNskQ..
LV UUID 0S4AAC-g4ip-0Zjs-0dQV-Yfym-tTNA-tPV1rA
LV Write Access read/write
LV snapshot status active destination for /dev/vg-WsNskQ../lv-OWzOIQ..
LV Status available
# open 1
LV Size 15.00 GB
Current LE 3840
COW-table size 7.50 GB
COW-table LE 1919
Allocated to snapshot 0.00%
Snapshot chunk size 4.00 KB
Segments 1
Allocation inherit
Read ahead sectors auto
– currently set to 256
Block device 253:5
dd if /dev/vg-WsNskQ../lv-snap-CfzmRA.. of //var/lib/eucalyptus/volumes/snap-C2DF3CF2 bs 1M
[root@Pod-03 ~]# ll /var/lib/eucalyptus/volumes/
total 29607236
-rw-r–r– 1 root root 8589934592 Jan 30 07:32 snap-26EE3E3A
-rw-r–r– 1 root root 16106127360 Jan 30 07:48 snap-C2DF3CF2
-rw-r–r– 1 root root 5368709120 Jan 30 06:49 snap-D7E53AC0
-rw-r–r– 1 root root 10741612544 Jan 20 09:56 vol-178C3E9C
-rw-r–r– 1 root root 5372903424 Jan 23 08:57 vol-391D44BE
-rw-r–r– 1 root root 16110321664 Jan 30 07:43 vol-D02E43C2
| <euca:StoreSnapshotType xmlns:euca=”http://msgs.eucalyptus.com”>
| <euca:WalrusDataRequestType>
| <euca:WalrusRequestType>
| <euca:correlationId>9105e2c8-b228-4dfa-b622-e384a232852f</euca:correlationId>
| <euca:_return>true</euca:_return>
| <euca:_services/>
| <euca:_disabledServices/>
| <euca:_notreadyServices/>
| <euca:accessKeyID>KGPY0PMLTKX4XUORAC8IK</euca:accessKeyID>
| <euca:timeStamp>2012-01-30T15:48:34.688Z</euca:timeStamp>
| <euca:bucket>snapset-ccc92f77-ab62-4554-9151-973e45fcc974</euca:bucket>
| <euca:key>snap-C2DF3CF2</euca:key>
| </euca:WalrusRequestType>
| <euca:randomKey>snapset-ccc92f77-ab62-4554-9151-973e45fcc974.snap-C2DF3CF2.JAoH7pTIt7gbzQ..</euca:randomKey>
| </euca:WalrusDataRequestType>
| <euca:snapshotSize>16106127360</euca:snapshotSize>
| </euca:StoreSnapshotType>
INFO WalrusManager.putObject(WalrusManager.java):1020 | Transfer complete: snapset-ccc92f77-ab62-4554-9151-973e45fcc974.snap-C2DF3CF2
[root@Pod-03 eucalyptus]# ll /var/lib/eucalyptus/bukkits/
total 24
drwxr-xr-x 2 eucalyptus eucalyptus 4096 Jan 30 05:05 euca-centos
drwxr-xr-x 2 eucalyptus eucalyptus 4096 Jan 16 06:50 euca-ubuntu
drwxr-xr-x 2 eucalyptus eucalyptus 4096 Jan 30 08:35 snapset-80efb05e-f0d7-444d-946d-9cfdad3845ad
drwxr-xr-x 2 eucalyptus eucalyptus 4096 Jan 30 06:51 snapset-ad471308-c3f9-4908-a4f0-1e8790d8b99f
drwxr-xr-x 2 eucalyptus eucalyptus 4096 Jan 30 09:08 snapset-ccc92f77-ab62-4554-9151-973e45fcc974
drwxr-xr-x 2 eucalyptus eucalyptus 4096 Jan 30 07:35 snapset-f394c343-2580-4406-a29b-b5b62b2b9fd1