Wiki
Version 7 (Vangelis Koukis, 10/10/2011 04:41 pm)
1 | 1 | Constantinos Venetsanopoulos | h1. snf-image |
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2 | 1 | Constantinos Venetsanopoulos | |
3 | 3 | Constantinos Venetsanopoulos | snf-image is a Ganeti OS Provider primarly used by Synnefo. |
4 | 2 | Constantinos Venetsanopoulos | |
5 | 7 | Vangelis Koukis | It is written from scratch and allows Ganeti to launch instances from predefined or untrusted custom Images. The whole process of deploying an Image onto the block device, as provided by Ganeti, is done in complete isolation from the physical host, enhancing robustness and security. |
6 | 1 | Constantinos Venetsanopoulos | |
7 | 7 | Vangelis Koukis | There are also additional hooks that can be enabled at image deployment. They allow for: |
8 | 1 | Constantinos Venetsanopoulos | |
9 | 7 | Vangelis Koukis | * changing the password of root or arbitrary users |
10 | 7 | Vangelis Koukis | * injecting files at arbitrary locations inside the filesystem, e.g., SSH keys |
11 | 7 | Vangelis Koukis | * setting a custom hostname |
12 | 7 | Vangelis Koukis | * re-creating SSH host keys to ensure the image uses unique keys |
13 | 1 | Constantinos Venetsanopoulos | |
14 | 7 | Vangelis Koukis | snf-image has been used successfully to deploy many major Linux distributions (Debian, Ubuntu/Kubuntu, CentOS, Fedora), as well as Windows 2008 R2. |
15 | 7 | Vangelis Koukis | |
16 | 7 | Vangelis Koukis | snf-image requires ganeti-os-interface v20 to operate. |
17 | 7 | Vangelis Koukis | It introduces the following OS parameters: |
18 | 7 | Vangelis Koukis | |
19 | 7 | Vangelis Koukis | * @img_id@ (/required/): the unique id of the image as known by the storage backend |
20 | 7 | Vangelis Koukis | * @img_format@ (/required/): the image format (extdump and ntfsdump [dd] currently supported) |
21 | 7 | Vangelis Koukis | * @img_passwd@ (/required/): the passwd to be injected inside the image |
22 | 7 | Vangelis Koukis | * @img_personality@ (/optional/): files to be injected into the image filesystem. It is a JSON-encoded list of files to be injected: every file is defined by its path and base64-encoded data. This format follows the notation proposed by the "OpenStack Compute API v1.1":http://docs.openstack.org/api/openstack-compute/1.1/content/CreateServers.html. ["more...":http://docs.openstack.org/api/openstack-compute/1.1/content/Server_Personality-d1e2543.html ] for defining server personalities. |
23 | 7 | Vangelis Koukis | |
24 | 7 | Vangelis Koukis | The snf-image Ganeti OS Provider is released under a [[Licence|2-clause BSD Licence]]. |
25 | 3 | Constantinos Venetsanopoulos | |
26 | 1 | Constantinos Venetsanopoulos | h2. Architecture |
27 | 3 | Constantinos Venetsanopoulos | |
28 | 1 | Constantinos Venetsanopoulos | h2. Download |
29 | 1 | Constantinos Venetsanopoulos | |
30 | 1 | Constantinos Venetsanopoulos | h2. Installation |
31 | 1 | Constantinos Venetsanopoulos | |
32 | 5 | Constantinos Venetsanopoulos | Before installing snf-image be sure to have a working Ganeti installation in your cluster. The installation process should take place in *all* ganeti nodes. Here we will describe the installation in a single node. The process is identical for all nodes and should be repeated manually or automatically (e.g. with puppet). |
33 | 5 | Constantinos Venetsanopoulos | |
34 | 5 | Constantinos Venetsanopoulos | # Download the snf-image-host debian package as described in the download section. |
35 | 5 | Constantinos Venetsanopoulos | # Install the snf-image-host debian package: |
36 | 5 | Constantinos Venetsanopoulos | <pre> |
37 | 5 | Constantinos Venetsanopoulos | # dpkg -i snf-image-host_version.deb |
38 | 5 | Constantinos Venetsanopoulos | </pre> |
39 | 5 | Constantinos Venetsanopoulos | # If the dependencies are not met, install all the dependencies using @apt-get install@ |
40 | 5 | Constantinos Venetsanopoulos | # Download the snf-image-helper debian package as described in the download section and store it in a handy location. |
41 | 5 | Constantinos Venetsanopoulos | # *Do NOT install the snf-image-helper debian package* in the Ganeti node (the package should be present but NOT installed in any node). |
42 | 6 | Constantinos Venetsanopoulos | # Configure the packages, as described in the next section, before you can start using the new OS Provider. |
43 | 5 | Constantinos Venetsanopoulos | |
44 | 5 | Constantinos Venetsanopoulos | h2. Configuration |
45 | 5 | Constantinos Venetsanopoulos | |
46 | 5 | Constantinos Venetsanopoulos | Once you have installed snf-image-host in the Ganeti node and also snf-image-helper is present, proceed with the following configuration: |
47 | 5 | Constantinos Venetsanopoulos | |
48 | 5 | Constantinos Venetsanopoulos | # Edit /etc/default/snf-image and set the HELPER_DIR variable to a directory in which all snf-helper related stuff are going to be stored (the directory should be able to store at least 700MB of data) |
49 | 5 | Constantinos Venetsanopoulos | # Move the snf-image-helper debian package inside this directory and edit the HELPER_PKG variable in /etc/default/snf-image accordingly |
50 | 5 | Constantinos Venetsanopoulos | <pre> |
51 | 5 | Constantinos Venetsanopoulos | $ mv /path/to/handy/location/snf-image-helper_version.deb HELPER_DIR/ |
52 | 5 | Constantinos Venetsanopoulos | </pre> |
53 | 5 | Constantinos Venetsanopoulos | # Update the helper-vm image and related data: |
54 | 5 | Constantinos Venetsanopoulos | <pre> |
55 | 5 | Constantinos Venetsanopoulos | $ /usr/bin/snf-image-update-helper |
56 | 5 | Constantinos Venetsanopoulos | </pre> |
57 | 5 | Constantinos Venetsanopoulos | |
58 | 1 | Constantinos Venetsanopoulos | h2. Features / Hooks |
59 | 1 | Constantinos Venetsanopoulos | |
60 | 1 | Constantinos Venetsanopoulos | h2. Community & Support |
61 | 1 | Constantinos Venetsanopoulos | |
62 | 1 | Constantinos Venetsanopoulos | * Bug-reports: snf-image-bugs@lists.grnet.gr |
63 | 1 | Constantinos Venetsanopoulos | * Support: snf-image-support@lists.grnet.gr |