Dne 25. 10. 21 v 21:09 Ben Cotton napsal(a):
=== Why not just use the rpm database? ===
<pre>
17:34:33 <dcantrell> The main reason for this appears to be that we
need the RPM db locally to resolve build-ids to package names. But
since containers wipe /var/lib/rpm, we can't do that. So the solution
is to put the ''nevra'' in ELF metadata?
17:34:39 <dcantrell> That feels like the wrong approach.
</pre>
First, there are legitimate reasons to strip packaging metadata from
images. For example, for an initrd image from rpms, I get 117 MB of
files (without compression), and out of this `/var/lib/rpm` is 5.9 MB,
and `/var/lib/dnf` is 4.2 MB. This is an overhead of 9%. This is ''not
much'', but still too much to keep in the image unless necessary.
Similar ratios will happen for containers of similar size. Reducing
image size by one tenth is important. There is no `rpm` or `dnf` in
the image, to the package database is not even usable without external
tools.
Devil advocate here:
**Some** people wipe `/var/lib/rpm` to save 5.9 MB. And because of this we will put another 5.9 MB [citation needed] as
metadata split across various ELF objects for **everybody**.
When someone want really tiny image, I will expect they will start stipping ELF objects when they discover this feature.
Miroslav
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