This article will demonstrates that how to re-configure the glance image-service to use backend store as swift object storage. By default , Image service will use the local filesystem to store the images when you are uploading it. The default local filesystem store directory is “/var/lib/glance/images/” on the system where you have configured the glance image service. In UnixArena tutorial , we have configured the glance image service on Openstack controller node. The local filesystem store will not be helpful when you try to scale up your environment.
Glance API will support the following back-end storage to store and retrieve the images quickly.
| Glance backend Storage | Description |
| glance.store.rbd.Store, | Ceph Storage |
| glance.store.s3.Store, | Amazon S3 |
| glance.store.swift.Store, | Swift Object Storage |
| glance.store.sheepdog.Store, | Sheepdog Storage |
| glance.store.cinder.Store, | Cinder Volume Storage |
| glance.store.gridfs.Store, | GridFS Storage |
| glance.store.vmware_datastore.Store, | VMware Datastore |
| glance.store.filesystem.Store, | Local filesystem (Default – /var/lib/glance/images/) |
| glance.store.http.Store | HTTP store ( URL ) |
Re-configure Glance Image API service to use Swift Storage:
Environment Details :
- Controller Node name – OSCTRL-UA
- Glance service user – glance
- Glance service users password – glance123
- Operating System – Ubuntu 14.04 TLS
- Openstack Version – Juno
root@OSCTRL-UA:~# keystone service-list +----------------------------------+------------+----------------+--------------------------+ | id | name | type | description | +----------------------------------+------------+----------------+--------------------------+ | d4371a7560d243bcb48e9db4d49ce7e1 | ceilometer | metering | Telemetry | | 7a90b86b3aab43d2b1194172a14fed79 | cinder | volume | OpenStack Block Storage | | 716e7125e8e44414ad58deb9fc4ca682 | cinderv2 | volumev2 | OpenStack Block Storage | | ee22977db7d84566a4c2217d48859001 | glance | image | OpenStack Image Service | | 59585bbaa4e04d2394df4a66e13993bf | heat | orchestration | Orchestration | | eefe2c1b881d431f83a5411ac7bfb20c | heat-cfn | cloudformation | Orchestration | | cfa2859138ae4549919cbf2bfd06346f | keystone | identity | OpenStack Identity | | 1d40c9c73ee64522a181bd6310efdf0b | neutron | network | OpenStack Networking | | 083b455a487647bbaa05a4a53b3a338f | nova | compute | OpenStack Compute | | 233aa2e309a142e188424ecbb41d1e07 | swift | object-store | OpenStack Object Storage | +----------------------------------+------------+----------------+--------------------------+ root@OSCTRL-UA:~# keystone endpoint-list +----------------------------------+-----------+---------------------------------------------+---------------------------------------------+----------------------------------------+----------------------------------+ | id | region | publicurl | internalurl | adminurl | service_id | +----------------------------------+-----------+---------------------------------------------+---------------------------------------------+----------------------------------------+----------------------------------+ | 4e2f418ef1eb4083a655e0a4eb60b736 | regionOne | http://OSCTRL-UA:8774/v2/%(tenant_id)s | http://OSCTRL-UA:8774/v2/%(tenant_id)s | http://OSCTRL-UA:8774/v2/%(tenant_id)s | 083b455a487647bbaa05a4a53b3a338f | | 5f0dfb2bdbb7483fa2d6165cf4d86ccc | regionOne | http://OSCTRL-UA:9696 | http://OSCTRL-UA:9696 | http://OSCTRL-UA:9696 | 1d40c9c73ee64522a181bd6310efdf0b | | 6a86eec28e434481ba88a153f53bb8c2 | regionOne | http://OSCTRL-UA:8776/v1/%(tenant_id)s | http://OSCTRL-UA:8776/v1/%(tenant_id)s | http://OSCTRL-UA:8776/v1/%(tenant_id)s | 7a90b86b3aab43d2b1194172a14fed79 | | 6b9825bbe27c4f978f17b3219c1579e4 | regionOne | http://OSCTRL-UA:8776/v1/%(tenant_id)s | http://OSCTRL-UA:8776/v1/%(tenant_id)s | http://OSCTRL-UA:8776/v1/%(tenant_id)s | 716e7125e8e44414ad58deb9fc4ca682 | | 75117db38ebc4868a69fc6b7e14fc054 | regionOne | http://OSCTRL-UA:8004/v1/%(tenant_id)s | http://OSCTRL-UA:8004/v1/%(tenant_id)s | http://OSCTRL-UA:8004/v1/%(tenant_id)s | 59585bbaa4e04d2394df4a66e13993bf | | 7dbbfe1b14c343048c01e672426154ed | regionOne | http://OSCTRL-UA:5000/v2.0 | http://OSCTRL-UA:5000/v2.0 | http://OSCTRL-UA:35357/v2.0 | cfa2859138ae4549919cbf2bfd06346f | | 7f9042c48a5f401c8dd734e4047ced96 | regionOne | http://OSCTRL-UA:8080/v1/AUTH_%(tenant_id)s | http://OSCTRL-UA:8080/v1/AUTH_%(tenant_id)s | http://OSCTRL-UA:8080 | 233aa2e309a142e188424ecbb41d1e07 | | 8a15369cd2e14aa199b4f60881169a1b | regionOne | http://OSCTRL-UA:8000/v1 | http://OSCTRL-UA:8000/v1 | http://OSCTRL-UA:8000/v1 | eefe2c1b881d431f83a5411ac7bfb20c | | b17e1f61815e4f83abf3606d1a7b3764 | regionOne | http://OSCTRL-UA:9292 | http://OSCTRL-UA:9292 | http://OSCTRL-UA:9292 | ee22977db7d84566a4c2217d48859001 | | b4534beb489d45af8af3aa62ede17053 | regionOne | http://OSCTRL-UA:8777 | http://OSCTRL-UA:8777 | http://OSCTRL-UA:8777 | d4371a7560d243bcb48e9db4d49ce7e1 | +----------------------------------+-----------+---------------------------------------------+---------------------------------------------+----------------------------------------+----------------------------------+ root@OSCTRL-UA:~#
1. Login to controller node. (Where you have configured the glance image service).
2. Edit the “/etc/glance/glance-api.conf” and update the sections like below.
- In the [DEFAULT] section ,
Existing Value:
default_store = file
Change to the new value,
default_store = swift
- In the “[glance_store]” section , enable the stores value as swift.
Existing Value:
#stores = glance.store.filesystem.Store,
Change to the new value,
stores = glance.store.swift.Store
- Comment out “filesystem_store_datadir” option.
Existing Value:
filesystem_store_datadir = /var/lib/glance/images/
Change to the new value,
# filesystem_store_datadir = /var/lib/glance/images/
- Update the swift store options.
Existing Value: (Not used)
swift_store_auth_address = 127.0.0.1:5000/v2.0/ swift_store_user = jdoe:jdoe swift_store_key = a86850deb2742ec3cb41518e26aa2d89 swift_store_create_container_on_put = False
Change to the new value,
swift_store_auth_address = http://OSCTRL-UA:35357/v2.0/ swift_store_user = service:glance swift_store_key = glance123 swift_store_create_container_on_put = True
Here is the difference between previous configuration and new one.
root@OSCTRL-UA:~# sdiff -s /etc/glance/glance-api.conf /etc/glance/glance-api.conf.filesystem.Store default_store = swift | default_store = file stores = glance.store.swift.Store | #stores = glance.store.filesystem.Store, # glance.store.filesystem.Store, < #filesystem_store_datadir = /var/lib/glance/images/ | filesystem_store_datadir = /var/lib/glance/images/ swift_store_auth_address = http://OSCTRL-UA:35357/v2.0/ | swift_store_auth_address = 127.0.0.1:5000/v2.0/ swift_store_user = service:glance | swift_store_user = jdoe:jdoe swift_store_key = glance123 | swift_store_key = a86850deb2742ec3cb41518e26aa2d89 swift_store_create_container_on_put = True | swift_store_create_container_on_put = False root@OSCTRL-UA:~#
3. Restart the glance api and registry service.
root@OSCTRL-UA:~# service glance-registry restart glance-registry stop/waiting glance-registry start/running, process 50894 root@OSCTRL-UA:~# service glance-api restart glance-api stop/waiting glance-api start/running, process 50908 root@OSCTRL-UA:~#
4. Source the admin credentials to gain access to CLI commands.
root@OSCTRL-UA:~# cat admin.rc export OS_USERNAME=admin export OS_PASSWORD=admin123 export OS_TENANT_NAME=admin export OS_AUTH_URL=http://OSCTRL-UA:35357/v2.0 root@OSCTRL-UA:~# source admin.rc root@OSCTRL-UA:~#
5. Verify the operation by creating the new glance image.
root@OSCTRL-UA:~# ls -lrt cirros-0.3.4-x86_64-disk.img -rw-r--r-- 1 root root 13287936 May 7 22:18 cirros-0.3.4-x86_64-disk.img root@OSCTRL-UA:~# glance image-create --name="CIRROS-NEW5" --disk-format=qcow2 --container-format=bare --is-public=true < cirros-0.3.4-x86_64-disk.img +------------------+--------------------------------------+ | Property | Value | +------------------+--------------------------------------+ | checksum | ee1eca47dc88f4879d8a229cc70a07c6 | | container_format | bare | | created_at | 2015-10-23T02:07:14 | | deleted | False | | deleted_at | None | | disk_format | qcow2 | | id | c7f5c590-b6e8-4083-8648-2066cdc46348 | | is_public | True | | min_disk | 0 | | min_ram | 0 | | name | CIRROS-NEW5 | | owner | d14d6a07f862482398b3e3e4e8d581c6 | | protected | False | | size | 13287936 | | status | active | | updated_at | 2015-10-23T02:07:15 | | virtual_size | None | +------------------+--------------------------------------+
6. List the newly created image using glance command.
root@OSCTRL-UA:~# glance image-list +--------------------------------------+-------------+-------------+------------------+----------+--------+ | ID | Name | Disk Format | Container Format | Size | Status | +--------------------------------------+-------------+-------------+------------------+----------+--------+ | c7f5c590-b6e8-4083-8648-2066cdc46348 | CIRROS-NEW5 | qcow2 | bare | 13287936 | active | +--------------------------------------+-------------+-------------+------------------+----------+--------+ root@OSCTRL-UA:~#
7. Do you would like to see the image file from swift storage ? Here you go. By default swift will create the container called “glance” for image service. (By using defined value “swift_store_create_container_on_put = True”)
root@OSCTRL-UA:~# swift --os-auth-url http://OSCTRL-UA:5000/v2.0 --os-tenant-name service --os-username glance --os-password glance123 list glance c7f5c590-b6e8-4083-8648-2066cdc46348 root@OSCTRL-UA:~#
You can see that file name is matching with glance image list ID.
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