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README.md 2.46 KiB

Automatic Update of Glance Images

This script automates the process of updating images of operating systems in OpenStack.

Currently the supported OS are:

  • CentOS 7
  • Debian 9
  • Fedora 28
  • Fedora 29
  • Ubuntu 16.04
  • Ubuntu 18.04

Installation

$ sudo apt install python3 python3-dev python3-pip -y 
$ pip3 install --upgrade pip
$ pip3 install datetime shade tqdm python-openstackclient
$ git clone https://git.garr.it/cloud/admin/update-images.git

Usage

Source the admin credentials to gain access to OpenStack commands:

$ source admin.rc

Execute the script

$ python3 update-images.py

Execution example

$ python3 update-images.py
Download...
From: http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud.qcow2
To:   downloads/centos7-1505262668.qcow2
downloads/centos7-1505262668.qcow2: 100%|████| 855M/855M [05:08<00:00, 2.77MB/s]
Download...
From: https://cdimage.debian.org/cdimage/openstack/current-9/debian-9-openstack-amd64.qcow2
To:   downloads/debian9-1507104230.qcow2
downloads/debian9-1507104230.qcow2: 585MB [00:32, 18.0MB/s]
Download...
From: https://cloud-images.ubuntu.com/releases/16.04/release/ubuntu-16.04-server-cloudimg-amd64-disk1.img
To:   downloads/ubuntu-16.04-1505853444.qcow2
downloads/ubuntu-16.04-1505853444.qcow2: 100%|████| 291M/291M [03:31<00:00, 1.37MB/s]

Images are now present in OpenStack Glance. This script uploads all the images as 'Public', accessible by all users.

Update simplestreams

After updating the images, update the simplestreams catalog:

$ openstack object list simplestreams
$ openstack object save simplestreams images/streams/v1/com.ubuntu.cloud-released-imagemetadata.json --file com.ubuntu.cloud-released-imagemetadata_backup.json
$ openstack object save simplestreams images/streams/v1/index.json --file index_backup.json

$ python3 generate-files-for-simplestream.py
$ cd output/simplestreams
$ ls -lh images/streams/v1/
$ openstack object create simplestreams images/streams/v1/com.ubuntu.cloud-released-imagemetadata.json images/streams/v1/index.json

Pipeline

  1. Fetch from config.yaml the url
  2. Download locally (in 'download' folder) the updated qcow2 of specified operating system
  3. Upload the qcow2 image on glance using openstack-cli commands

Notes