Planet Ceph

Aggregated news from external sources

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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