This article will guide you to configure the Image service on Openstack. Openstack image service has been development and maintained in the name of Glance. Glance service enables users/customers to discover , register and retrieve virtual machine images. Virtual machine images can be stored in normal file-systems like ext3 ,ext4 or it can be stored it in object storage systems like swift. In this article , we will use the local file-system as glance storage. Image service consists below listed components.
- glance-api : Accepts Image API calls for vm image discovery, retrieval, and storage.
- glance-registry. Stores images, processes, and retrieves metadata about images. Metadata includes items such as size and type.
- Database – Glance service require database to store the image metadata. You can either use MySQL or SQlite database.
- Storage repository – Image service (glance) supports many storage repositories including normal file-systems , Object storage, RADOS block devices , HTTP and Amazon S3 .
In short, openstack Glance service works like a registry service for virtual disk images. Using glance service, openstack users can add new instance images (Ex:RHEL , SUSE , Windows Server , Ubunutu) , snapshot of image from existing instance and launch the instance using the snapshot.
In our environment , Controller node will host the glance service. So login to the Openstack controller node and begin the glance installation.
Install the Image Service:
1.Install glance image service components on openstack controller node.
root@OSCTRL-UA:/var/lib# apt-get install glance python-glanceclient Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: glance-api glance-common glance-registry python-boto python-cinderclient python-concurrent.futures python-glance python-glance-store python-httplib2 python-ipaddr python-json-patch python-json-pointer python-jsonpatch python-oslo.vmware python-osprofiler python-retrying python-simplegeneric python-simplejson python-suds python-swiftclient python-warlock python-wsme Suggested packages: python-ceph The following NEW packages will be installed: glance glance-api glance-common glance-registry python-boto python-cinderclient python-concurrent.futures python-glance python-glance-store python-glanceclient python-httplib2 python-ipaddr python-json-patch python-json-pointer python-jsonpatch python-oslo.vmware python-osprofiler python-retrying python-simplegeneric python-simplejson python-suds python-swiftclient python-warlock python-wsme 0 upgraded, 24 newly installed, 0 to remove and 17 not upgraded. Need to get 1,667 kB of archives. After this operation, 12.3 MB of additional disk space will be used. Do you want to continue? [Y/n] Y Get:23 http://in.archive.ubuntu.com/ubuntu/ trusty/main python-concurrent.futures all 2.1.6-3 [32.8 kB] Get:24 http://in.archive.ubuntu.com/ubuntu/ trusty/main python-httplib2 all 0.8-2build1 [35.4 kB] Fetched 1,667 kB in 12s (136 kB/s) Selecting previously unselected package python-simplejson. (Reading database ... 95790 files and directories currently installed.) Preparing to unpack .../python-simplejson_3.3.1-1ubuntu6_amd64.deb ... Unpacking python-simplejson (3.3.1-1ubuntu6) ... Selecting previously unselected package python-cinderclient. Preparing to unpack .../python-cinderclient_1%3a1.1.0-0ubuntu1~cloud0_all.deb ... Unpacking python-cinderclient (1:1.1.0-0ubuntu1~cloud0) ... Selecting previously unselected package python-glance-store. Preparing to unpack .../python-glance-store_0.1.8-1ubuntu2~cloud0_all.deb ... Unpacking python-glance-store (0.1.8-1ubuntu2~cloud0) ... Selecting previously unselected package python-json-pointer. Preparing to unpack .../python-json-pointer_1.0-2build1_all.deb ... Unpacking python-json-pointer (1.0-2build1) ... Selecting previously unselected package python-jsonpatch. Preparing to unpack .../python-jsonpatch_1.3-4_all.deb ... Unpacking python-jsonpatch (1.3-4) ... Selecting previously unselected package python-json-patch. Preparing to unpack .../python-json-patch_1.3-4_all.deb ... Unpacking python-json-patch (1.3-4) ... Selecting previously unselected package python-suds. Setting up python-swiftclient (1:2.3.0-0ubuntu1~cloud0) ... Setting up python-glance (1:2014.2.3-0ubuntu1~cloud1) ... Setting up glance-common (1:2014.2.3-0ubuntu1~cloud1) ... Adding system user `glance' (UID 112) ... Adding new user `glance' (UID 112) with group `glance' ... Not creating home directory `/var/lib/glance'. Setting up glance-api (1:2014.2.3-0ubuntu1~cloud1) ... glance-api start/running, process 4146 Setting up glance-registry (1:2014.2.3-0ubuntu1~cloud1) ... glance-registry start/running, process 4181 Setting up python-glanceclient (1:0.14.0-0ubuntu1~cloud0) ... Processing triggers for ureadahead (0.100.0-16) ... Setting up glance (1:2014.2.3-0ubuntu1~cloud1) ... root@OSCTRL-UA:/var/lib#
2. Edit the glance-api & glance-registry configuration files to update the MySQL DB information. As I said earlier, glance service required DB to storage the information. please refer part 2 to see the password database.
root@OSCTRL-UA:/var/lib# egrep "database|mysql:" /etc/glance/glance-api.conf |grep -v "#" [database] connection = mysql://glance:glancedb123@OSCTRL-UA/glance root@OSCTRL-UA:/var/lib# root@OSCTRL-UA:~# egrep "database|mysql:" /etc/glance/glance-registry.conf |grep -v "#" [database] connection = mysql://glance:glancedb123@OSCTRL-UA/glance root@OSCTRL-UA:~#
- Password- glancedb123
- Controller Node – OSCTRL-UA
3.Configure the glance image service to use RabbitMQ (Message Broker). Update the RabbitMQ host , password information on glance-api.conf. For pre-configured password , please refer part 2.
root@OSCTRL-UA:~# grep rabbit /etc/glance/glance-registry.conf rpc_backend = rabbit # Configuration options if sending notifications via rabbitmq (these are rabbit_host = OSCTRL-UA rabbit_port = 5672 rabbit_use_ssl = false rabbit_userid = guest rabbit_password = rabbit123 rabbit_virtual_host = / rabbit_notification_exchange = glance rabbit_notification_topic = notifications rabbit_durable_queues = False root@OSCTRL-UA:~# root@OSCTRL-UA:~# grep rabbit /etc/glance/glance-api.conf rpc_backend = rabbit # Configuration options if sending notifications via rabbitmq (these are rabbit_host = OSCTRL-UA rabbit_port = 5672 rabbit_use_ssl = false rabbit_userid = guest rabbit_password = rabbit123 rabbit_virtual_host = / rabbit_notification_exchange = glance rabbit_notification_topic = notifications rabbit_durable_queues = False root@OSCTRL-UA:~#
Please remove if there is any sqlite tables .
# rm /var/lib/glance/glance.sqlite
4. Create the Database & users for Glance on mysql.
root@OSCTRL-UA:~# mysql -u root -pstack Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 36 Server version: 5.5.44-0ubuntu0.14.04.1 (Ubuntu) Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> CREATE DATABASE glance; Query OK, 1 row affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'localhost' IDENTIFIED BY 'glancedb123'; Query OK, 0 rows affected (0.01 sec) mysql> GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'%' IDENTIFIED BY 'glancedb123'; Query OK, 0 rows affected (0.00 sec) mysql> exit Bye
5. Create the necessary tables for glance service using the below command.
root@OSCTRL-UA:~# su -s /bin/sh -c "glance-manage db_sync" glance root@OSCTRL-UA:~#
Preparing keystone service for glance:
6. Export the variable or create the file like below & source it. (To reduce the command length. Otherwise you need to provide the below credentials on all the 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:~# root@OSCTRL-UA:~# source admin.rc
7. Create the glance user on keystone . This user will be used to authenticate with keystone service.
root@OSCTRL-UA:~# keystone user-create --name=glance --pass=glance123 --email=glance@unixarena.com +----------+----------------------------------+ | Property | Value | +----------+----------------------------------+ | email | glance@unixarena.com | | enabled | True | | id | e19954b08ac34e39b5f8b87001910734 | | name | glance | | username | glance | +----------+----------------------------------+ root@OSCTRL-UA:~#
8. Add admin role to the glance user.
root@OSCTRL-UA:~# keystone user-role-add --user=glance --tenant=service --role=admin root@OSCTRL-UA:~#
Configure image service to use keystone:
9. Configure the image service to use keystone server by editing the glance configuration files like below.
root@OSCTRL-UA:~# grep -A9 keystone_authtoken /etc/glance/glance-api.conf [keystone_authtoken] auth_uri = http://OSCTRL-UA:5000 auth_host = OSCTRL-UA auth_port = 35357 auth_protocol = http admin_tenant_name = service admin_user = glance admin_password = glance123 revocation_cache_time = 10 root@OSCTRL-UA:~# root@OSCTRL-UA:~# grep -A9 keystone_authtoken /etc/glance/glance-registry.conf [keystone_authtoken] auth_uri = http://OSCTRL-UA:5000 auth_host = OSCTRL-UA auth_port = 35357 auth_protocol = http admin_tenant_name = service admin_user = glance admin_password = glance123 revocation_cache_time = 10 root@OSCTRL-UA:~#
10. Set the flavour as keystone on both glance configuration files.
root@OSCTRL-UA:~# grep -A8 paste_deploy /etc/glance/glance-registry.conf [paste_deploy] # Name of the paste configuration file that defines the available pipelines #config_file = glance-registry-paste.ini # Partial name of a pipeline in your paste configuration file with the # service name removed. For example, if your paste section name is # [pipeline:glance-registry-keystone], you would configure the flavor below # as 'keystone'. flavor=keystone root@OSCTRL-UA:~# root@OSCTRL-UA:~# grep -A8 paste_deploy /etc/glance/glance-api.conf [paste_deploy] # Name of the paste configuration file that defines the available pipelines #config_file = glance-api-paste.ini # Partial name of a pipeline in your paste configuration file with the # service name removed. For example, if your paste section name is # [pipeline:glance-api-keystone], you would configure the flavor below # as 'keystone'. flavor=keystone root@OSCTRL-UA:~#
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