OpenStack – Glance installation tutorial (CentOS) (Part 3/9)

After we done preparation steps here and keystone deployment (described here) our next step will be to install image service – glance.

Prerequisites

We have to create database, service credentials and API endpoints.

mysql -u root -p

Change GLANCE_DBPASS to password that suits you.

CREATE DATABASE glance;
GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'localhost' \
  IDENTIFIED BY 'GLANCE_DBPASS';
GRANT ALL PRIVILEGES ON glance.* TO 'glance'@'%' \
  IDENTIFIED BY 'GLANCE_DBPASS';

Navigate to the dir you created admin-openrc script and run it

. admin-openrc.sh

We will create user glance

openstack user create --domain default --password-prompt glance

Add admin role to the glance user and service project

openstack role add --project service --user glance admin

Create glance service entity

openstack service create --name glance \
  --description "OpenStack Image" image

Create API endpoints

openstack endpoint create --region RegionOne \
  image public http://controller:9292
openstack endpoint create --region RegionOne \
  image internal http://controller:9292
openstack endpoint create --region RegionOne \
  image admin http://controller:9292

Open firewall ports

sudo firewall-cmd --add-port=9292/tcp --permanent
sudo firewall-cmd --add-port=9292/udp --permanent
sudo firewall-cmd --reload 

Installation and Configuration

Installation

sudo yum install openstack-glance

Next, we need to edit /etc/glance/glance-api.conf

sudo vi /etc/glance/glance-api.conf

Database section – we need to configure database access. Change GLANCE_DBPASS with the password you selected for glance database user.

[database]
# ...
connection = mysql+pymysql://glance:GLANCE_DBPASS@controller/glance

We also need to edit keystone_authtoken and paste_deploy sections. Replace GLANCE_PASS with the pass you created for glance system user. In keystone section comment out all other options expect those listed below.

[keystone_authtoken]
# ...
www_authenticate_uri  = http://controller:5000
auth_url = http://controller:5000
memcached_servers = controller:11211
auth_type = password
project_domain_name = Default
user_domain_name = Default
project_name = service
username = glance
password = GLANCE_PASS

[paste_deploy]

# … flavor = keystone

Change auth_uri = to auth_url =

I couldn’t find some values under keystone_authoken so I just added them under the keystone_authoken section. !!! Be careful with this, I did it this way, we will see if it will work.

One more section to go

glance_store

[glance_store]
# ...
stores = file,http
default_store = file
filesystem_store_datadir = /var/lib/glance/images/

Populate image service database

su -s /bin/sh -c "glance-manage db_sync" glance

At last, we will enable and start service

sudo systemctl enable openstack-glance-api.service
sudo systemctl start openstack-glance-api.service

To wrap-up, we will change boolean values if SELinux is enabled.

setsebool -P glance_api_can_network on 

Verify operation

To verify operation, we will download CirrOS, small Linux distribution and upload it to our image service

Install wget if you don’t have it installed.

sudo yum install wget

Next, source admin to gain access to admin only cli commands

. admin-openrc

or if you done previos parts with my tutorials

. admin-openrc.sh

We will download the source image

wget http://download.cirros-cloud.net/0.4.0/cirros-0.4.0-x86_64-disk.img

We will upload it to image service by using qcow2 disk format, bare container format and make it publicly visible.

glance image-create --name "cirros" \
  --file cirros-0.4.0-x86_64-disk.img \
  --disk-format qcow2 --container-format bare \
  --visibility public

We now just need to confirm the upload

glance image-list

That is it for the glance.

Next step will be placement service installation -> placement

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