Hi there.
Please, what is the lighter AMD-64 image available at Linux Containers - Image server (https://us.images.linuxcontainers.org) ?
lighter = fewer processes, memory and disk usage per container.
Thanks.
Emerson Barea
You can get the list of images along with their size by running
$ lxc image list images:
+-------------------------------+--------------+--------+------------------------------------------+---------+----------+-------------------------------+
| ALIAS | FINGERPRINT | PUBLIC | DESCRIPTION | ARCH | SIZE | UPLOAD DATE |
+-------------------------------+--------------+--------+------------------------------------------+---------+----------+-------------------------------+
| alpine/3.4 (3 more) | cc8b58012122 | yes | Alpine 3.4 amd64 (20180627_17:50) | x86_64 | 2.04MB | Jun 27, 2018 at 12:00am (UTC) |
+-------------------------------+--------------+--------+------------------------------------------+---------+----------+-------------------------------+
| alpine/3.4/armhf (1 more) | 7813a1299900 | yes | Alpine 3.4 armhf (20180627_17:50) | armv7l | 1.63MB | Jun 27, 2018 at 12:00am (UTC) |
+-------------------------------+--------------+--------+------------------------------------------+---------+----------+-------------------------------+
| alpine/3.4/i386 (1 more) | 612c3ece0803 | yes | Alpine 3.4 i386 (20180627_17:50) | i686 | 1.88MB | Jun 27, 2018 at 12:00am (UTC) |
+-------------------------------+--------------+--------+------------------------------------------+---------+----------+-------------------------------+
...
The smallest the container image size, the smaller the container and the less resources it would use.
There are already hints that the Alpine Linux container images should be the lightest of all.
But how can we sort the list of container images per size?
Run the following:
$ lxc image list images: --format=csv > ContainerImages.csv
Then, you can open the CSV file with LibreOffice or MSOffice and sort the table by container size.
The output will look like:
| Container image | Hash | Public | Description | Architecture | Size | Upload Date |
|---|---|---|---|---|---|---|
| alpine/3.4/armhf (1 more) | 7813a1299900 | yes | Alpine 3.4 armhf (20180627_17:50) | armv7l | 1.63MB | Jun 27, 2018 at 12:00am (UTC) |
| 27aba5e24506 | yes | Alpine 3.4 armhf (20180626_17:50) | armv7l | 1.63MB | Jun 26, 2018 at 12:00am (UTC) | |
| 7e3a420c6c75 | yes | Alpine 3.4 armhf (20180625_17:50) | armv7l | 1.63MB | Jun 25, 2018 at 12:00am (UTC) | |
| alpine/3.4/i386 (1 more) | 612c3ece0803 | yes | Alpine 3.4 i386 (20180627_17:50) | i686 | 1.88MB | Jun 27, 2018 at 12:00am (UTC) |
| 4f2eff83cffc | yes | Alpine 3.4 i386 (20180625_17:50) | i686 | 1.88MB | Jun 25, 2018 at 12:00am (UTC) | |
| 8986e64111be | yes | Alpine 3.4 i386 (20180626_17:50) | i686 | 1.88MB | Jun 26, 2018 at 12:00am (UTC) | |
| alpine/3.4 (3 more) | cc8b58012122 | yes | Alpine 3.4 amd64 (20180627_17:50) | x86_64 | 2.04MB | Jun 27, 2018 at 12:00am (UTC) |
| 5e9aad1cf27b | yes | Alpine 3.4 amd64 (20180626_17:50) | x86_64 | 2.04MB | Jun 26, 2018 at 12:00am (UTC) | |
| b97b6900ecfd | yes | Alpine 3.4 amd64 (20180625_17:50) | x86_64 | 2.04MB | Jun 25, 2018 at 12:00am (UTC) | |
| alpine/3.8/arm64 (1 more) | c5d37d9ac0e3 | yes | Alpine 3.8 arm64 (20181126_13:02) | aarch64 | 2.23MB | Nov 26, 2018 at 12:00am (UTC) |
| 47f6ed377372 | yes | Alpine 3.8 arm64 (20181125_01:46) | aarch64 | 2.23MB | Nov 25, 2018 at 12:00am (UTC) | |
| 627fde699ff6 | yes | Alpine 3.8 arm64 (20181125_13:02) | aarch64 | 2.23MB | Nov 25, 2018 at 12:00am (UTC) |
Therefore, the Alpine 3.4 container image is the smallest of all.
It is also possible to check the number of running processes between each container and get a more precise answer. However, I strongly believe that Alpine is the lightest of all.
There is the possibility to create an even leaner container image, presumably working on the Alpine Linux container image. For that, see distrobuilder at https://github.com/lxc/distrobuilder
See https://blog.simos.info/how-to-create-a-minimal-container-image-for-lxc-lxd-with-distrobuilder/ for a hint on how to do that.
Great Simos. This is exactly that I need.
Thank you.
Emerson Barea
Another way is import busybox image like procedure found in " Importing from a URL" topic at https://stgraber.org/2016/03/30/lxd-2-0-image-management-512/
using this command: lxc image import https://dl.stgraber.org/lxd --alias busybox-amd64
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