Thursday, December 5, 2013

Ceph + OpenStack :: Part-5



OpenStack Instance boot from Ceph Volume

  • For a list of images to choose from to create a bootable volume
[root@rdo /(keystone_admin)]# nova image-list
+--------------------------------------+-----------------------------+--------+--------+
| ID                                   | Name                        | Status | Server |
+--------------------------------------+-----------------------------+--------+--------+
| f61edc8d-c9a1-4ff4-b4fc-c8128bd1a10b | Ubuntu 12.04 cloudimg amd64 | ACTIVE |        |
| fcc07414-bbb3-4473-a8df-523664c8c9df | ceph-glance-image           | ACTIVE |        |
| be62a5bf-879f-4d1f-846c-fdef960224ff | precise-cloudimg.raw        | ACTIVE |        |
| 3c2db0ad-8d1e-400d-ba13-a506448f2a8e | precise-server-cloudimg     | ACTIVE |        |
+--------------------------------------+-----------------------------+--------+--------+
[root@rdo /(keystone_admin)]#
  • To create a bootable volume from an image, include the image ID in the command: Before the volume builds, its bootable state is false.
[root@rdo qemu(keystone_admin)]# cinder create --image-id be62a5bf-879f-4d1f-846c-fdef960224ff --display-name my-boot-vol 10
+---------------------+--------------------------------------+
|       Property      |                Value                 |
+---------------------+--------------------------------------+
|     attachments     |                  []                  |
|  availability_zone  |                 nova                 |
|       bootable      |                false                 |
|      created_at     |      2013-12-05T13:34:38.296723      |
| display_description |                 None                 |
|     display_name    |             my-boot-vol              |
|          id         | 5fca6e1b-b494-4773-9c78-63f72703bfdf |
|       image_id      | be62a5bf-879f-4d1f-846c-fdef960224ff |
|       metadata      |                  {}                  |
|         size        |                  10                  |
|     snapshot_id     |                 None                 |
|     source_volid    |                 None                 |
|        status       |               creating               |
|     volume_type     |                 None                 |
+---------------------+--------------------------------------+
[root@rdo qemu(keystone_admin)]#
[root@rdo qemu(keystone_admin)]# cinder list
+--------------------------------------+-------------+--------------+------+--------------+----------+--------------------------------------+
|                  ID                  |    Status   | Display Name | Size | Volume Type  | Bootable |             Attached to              |
+--------------------------------------+-------------+--------------+------+--------------+----------+--------------------------------------+
| 0e2bfced-be6a-44ec-a3ca-22c771c66cdc |    in-use   |  nova-vol_1  |  2   |     None     |  false   | 9d3c327f-1893-40ff-8a82-16fad9ce6d91 |
| 10cc0855-652a-4a9b-baa1-80bc86dc12ac |  available  |  ceph-vol1   |  5   | ceph-storage |  false   |                                      |
| 5fca6e1b-b494-4773-9c78-63f72703bfdf | downloading | my-boot-vol  |  10  |     None     |  false   |                                      |
+--------------------------------------+-------------+--------------+------+--------------+----------+--------------------------------------+

  • Wait for few minutes the bootable state turns to true. Copy the value in the ID field for your volume.
[root@rdo qemu(keystone_admin)]# cinder list
+--------------------------------------+-----------+--------------+------+--------------+----------+--------------------------------------+
|                  ID                  |   Status  | Display Name | Size | Volume Type  | Bootable |             Attached to              |
+--------------------------------------+-----------+--------------+------+--------------+----------+--------------------------------------+
| 0e2bfced-be6a-44ec-a3ca-22c771c66cdc |   in-use  |  nova-vol_1  |  2   |     None     |  false   | 9d3c327f-1893-40ff-8a82-16fad9ce6d91 |
| 10cc0855-652a-4a9b-baa1-80bc86dc12ac | available |  ceph-vol1   |  5   | ceph-storage |  false   |                                      |
| 5fca6e1b-b494-4773-9c78-63f72703bfdf | available | my-boot-vol  |  10  |     None     |   true   |                                      |
+--------------------------------------+-----------+--------------+------+--------------+----------+--------------------------------------+
[root@rdo qemu(keystone_admin)]#
  • Create a nova instance which will be boot from ceph volume
[root@rdo qemu(keystone_admin)]# nova boot --flavor 2 --image be62a5bf-879f-4d1f-846c-fdef960224ff --block_device_mapping vda=5fca6e1b-b494-4773-9c78-63f72703bfdf::0 --security_groups=default --nic net-id=4fe5909e-02db-4517-89f2-1278248fa26c  myInstanceFromVolume
+--------------------------------------+--------------------------------------+
| Property                             | Value                                |
+--------------------------------------+--------------------------------------+
| OS-EXT-STS:task_state                | scheduling                           |
| image                                | precise-cloudimg.raw                 |
| OS-EXT-STS:vm_state                  | building                             |
| OS-EXT-SRV-ATTR:instance_name        | instance-0000001e                    |
| OS-SRV-USG:launched_at               | None                                 |
| flavor                               | m1.small                             |
| id                                   | f24a0b29-9f1e-444b-b895-c3c694f2f1bc |
| security_groups                      | [{u'name': u'default'}]              |
| user_id                              | 99f8019ba2694d78a680a5de46aa1afd     |
| OS-DCF:diskConfig                    | MANUAL                               |
| accessIPv4                           |                                      |
| accessIPv6                           |                                      |
| progress                             | 0                                    |
| OS-EXT-STS:power_state               | 0                                    |
| OS-EXT-AZ:availability_zone          | nova                                 |
| config_drive                         |                                      |
| status                               | BUILD                                |
| updated                              | 2013-12-05T13:47:34Z                 |
| hostId                               |                                      |
| OS-EXT-SRV-ATTR:host                 | None                                 |
| OS-SRV-USG:terminated_at             | None                                 |
| key_name                             | None                                 |
| OS-EXT-SRV-ATTR:hypervisor_hostname  | None                                 |
| name                                 | myInstanceFromVolume                 |
| adminPass                            | qt34izQiLkG3                         |
| tenant_id                            | 0dafe42cfde242ddbb67b681f59bdb00     |
| created                              | 2013-12-05T13:47:34Z                 |
| os-extended-volumes:volumes_attached | []                                   |
| metadata                             | {}                                   |
+--------------------------------------+--------------------------------------+
[root@rdo qemu(keystone_admin)]#
[root@rdo qemu(keystone_admin)]#
[root@rdo qemu(keystone_admin)]#
[root@rdo qemu(keystone_admin)]# nova list
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
| ID                                   | Name                 | Status  | Task State | Power State | Networks            |
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
| 0043a8be-60d1-43ed-ba43-1ccd0bba7559 | instance2            | SHUTOFF | None       | Shutdown    | public=172.24.4.228 |
| f24a0b29-9f1e-444b-b895-c3c694f2f1bc | myInstanceFromVolume | BUILD   | spawning   | NOSTATE     | private=10.0.0.3    |
| 9d3c327f-1893-40ff-8a82-16fad9ce6d91 | small-ubuntu         | ACTIVE  | None       | Running     | public=172.24.4.230 |
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
[root@rdo qemu(keystone_admin)]#
  • Just in few minutes the instance starts RUNNING , time for a party now
[root@rdo qemu(keystone_admin)]# nova list
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
| ID                                   | Name                 | Status  | Task State | Power State | Networks            |
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
| 0043a8be-60d1-43ed-ba43-1ccd0bba7559 | instance2            | SHUTOFF | None       | Shutdown    | public=172.24.4.228 |
| f24a0b29-9f1e-444b-b895-c3c694f2f1bc | myInstanceFromVolume | ACTIVE  | None       | Running     | private=10.0.0.3    |
| 9d3c327f-1893-40ff-8a82-16fad9ce6d91 | small-ubuntu         | ACTIVE  | None       | Running     | public=172.24.4.230 |
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
[root@rdo qemu(keystone_admin)]#

OpenStack Instance boot from Ceph Volume :: Troubleshooting


  • During boot from volume , i encountered some errors after creating nova instance. The image was not able to get booted up from volume
[root@rdo nova(keystone_admin)]# nova boot --flavor 2 --image be62a5bf-879f-4d1f-846c-fdef960224ff --block_device_mapping vda=dd315dda-b22a-4cf8-8b77-7c2b2f163155:::0 --security_groups=default --nic net-id=4fe5909e-02db-4517-89f2-1278248fa26c  myInstanceFromVolume
+--------------------------------------+----------------------------------------------------+
| Property                             | Value                                              |
+--------------------------------------+----------------------------------------------------+
| OS-EXT-STS:task_state                | scheduling                                         |
| image                                | precise-cloudimg.raw                               |
| OS-EXT-STS:vm_state                  | building                                           |
| OS-EXT-SRV-ATTR:instance_name        | instance-0000001d                                  |
| OS-SRV-USG:launched_at               | None                                               |
| flavor                               | m1.small                                           |
| id                                   | f324e9b8-ec3a-4174-8b97-bf78dba62932               |
| security_groups                      | [{u'name': u'default'}]                            |
| user_id                              | 99f8019ba2694d78a680a5de46aa1afd                   |
| OS-DCF:diskConfig                    | MANUAL                                             |
| accessIPv4                           |                                                    |
| accessIPv6                           |                                                    |
| progress                             | 0                                                  |
| OS-EXT-STS:power_state               | 0                                                  |
| OS-EXT-AZ:availability_zone          | nova                                               |
| config_drive                         |                                                    |
| status                               | BUILD                                              |
| updated                              | 2013-12-05T12:42:22Z                               |
| hostId                               |                                                    |
| OS-EXT-SRV-ATTR:host                 | None                                               |
| OS-SRV-USG:terminated_at             | None                                               |
| key_name                             | None                                               |
| OS-EXT-SRV-ATTR:hypervisor_hostname  | None                                               |
| name                                 | myInstanceFromVolume                               |
| adminPass                            | eish5pu56CiE                                       |
| tenant_id                            | 0dafe42cfde242ddbb67b681f59bdb00                   |
| created                              | 2013-12-05T12:42:21Z                               |
| os-extended-volumes:volumes_attached | [{u'id': u'dd315dda-b22a-4cf8-8b77-7c2b2f163155'}] |
| metadata                             | {}                                                 |
+--------------------------------------+----------------------------------------------------+
[root@rdo nova(keystone_admin)]#
[root@rdo nova(keystone_admin)]#
[root@rdo nova(keystone_admin)]#
[root@rdo nova(keystone_admin)]# nova list
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
| ID                                   | Name                 | Status  | Task State | Power State | Networks            |
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
| 0043a8be-60d1-43ed-ba43-1ccd0bba7559 | instance2            | SHUTOFF | None       | Shutdown    | public=172.24.4.228 |
| f324e9b8-ec3a-4174-8b97-bf78dba62932 | myInstanceFromVolume | ERROR   | None       | NOSTATE     | private=10.0.0.3    |
| 9d3c327f-1893-40ff-8a82-16fad9ce6d91 | small-ubuntu         | ACTIVE  | None       | Running     | public=172.24.4.230 |
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
[root@rdo nova(keystone_admin)]#
  • After checking up logs from /var/log/libvirt/qemu/instance-0000001d.log
qemu-kvm: -drive file=rbd:ceph-volumes/volume-dd315dda-b22a-4cf8-8b77-7c2b2f163155:id=volumes:key=AQC804xS8HzFJxAAD/zzQ8LMzq9wDLq/5a472g==:auth_supported=cephx\;none:mon_host=192.168.1.31\:6789\;192.168.1.33\:6789\;192.168.1.38\:6789,if=none,id=drive-virtio-disk0,format=raw,serial=dd315dda-b22a-4cf8-8b77-7c2b2f163155,cache=none: could not open disk image rbd:ceph-volumes/volume-dd315dda-b22a-4cf8-8b77-7c2b2f163155:id=volumes:key=AQC804xS8HzFJxAAD/zzQ8LMzq9wDLq/5a472g==:auth_supported=cephx\;none:mon_host=192.168.1.31\:6789\;192.168.1.33\:6789\;192.168.1.38\:6789: No such file or directory
2013-12-05 12:42:29.544+0000: shutting down
  • Run qemu-img -h command to check for the supported format , here i found rbd format is not supported by qemu , so there is something fishy in this
Supported formats: raw cow qcow vdi vmdk cloop dmg bochs vpc vvfat qcow2 qed vhdx parallels nbd blkdebug host_cdrom host_floppy host_device file gluster gluster gluster gluster
  • Check the installed qemu version
[root@rdo qemu(keystone_admin)]# rpm -qa | grep -i qemu
qemu-img-0.12.1.2-2.415.el6_5.3.x86_64
qemu-guest-agent-0.12.1.2-2.415.el6_5.3.x86_64
gpxe-roms-qemu-0.9.7-6.10.el6.noarch
qemu-kvm-0.12.1.2-2.415.el6_5.3.x86_64
qemu-kvm-tools-0.12.1.2-2.415.el6_5.3.x86_64
[root@rdo qemu(keystone_admin)]#
  • Have a look on previous post to see the installation of correct version of qemu . After this your nova instance should boot from volume


[root@rdo qemu(keystone_admin)]# rpm -qa | grep -i qemu
qemu-img-0.12.1.2-2.355.el6.2.cuttlefish.async.x86_64
qemu-guest-agent-0.12.1.2-2.355.el6.2.cuttlefish.async.x86_64
qemu-kvm-0.12.1.2-2.355.el6.2.cuttlefish.async.x86_64
gpxe-roms-qemu-0.9.7-6.10.el6.noarch
qemu-kvm-tools-0.12.1.2-2.355.el6.2.cuttlefish.async.x86_64
[root@rdo qemu(keystone_admin)]#

[root@rdo /(keystone_admin)]# qemu-img -h | grep -i rbd
Supported formats: raw cow qcow vdi vmdk cloop dmg bochs vpc vvfat qcow2 qed parallels nbd blkdebug host_cdrom host_floppy host_device file rbd
[root@rdo /(keystone_admin)]#


[root@rdo qemu(keystone_admin)]# nova list
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
| ID                                   | Name                 | Status  | Task State | Power State | Networks            |
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
| 0043a8be-60d1-43ed-ba43-1ccd0bba7559 | instance2            | SHUTOFF | None       | Shutdown    | public=172.24.4.228 |
| f24a0b29-9f1e-444b-b895-c3c694f2f1bc | myInstanceFromVolume | ACTIVE  | None       | Running     | private=10.0.0.3    |
| 9d3c327f-1893-40ff-8a82-16fad9ce6d91 | small-ubuntu         | ACTIVE  | None       | Running     | public=172.24.4.230 |
+--------------------------------------+----------------------+---------+------------+-------------+---------------------+
[root@rdo qemu(keystone_admin)]#

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