Reduce size of the build

[alicefr]

I just notice that when we compile the operator in the contains, it creates some huge layers during the builds:

How to reproduce:

$ make image

and then monitor the podman images:

$  podman images 
REPOSITORY                                                          TAG         IMAGE ID      CREATED         SIZE
<none>                                                              <none>      82d2c9227d58  10 seconds ago  4.76 GB
localhost:5000/trusted-execution-clusters/registration-server       latest      25de9d6fff69  2 minutes ago   336 MB
<none>                                                              <none>      791a8d0f89ee  3 minutes ago   5.06 GB
localhost:5000/trusted-execution-clusters/compute-pcrs              latest      dc0f8e7f7252  6 minutes ago   294 MB
<none>                                                              <none>      11b4c4d25cc0  6 minutes ago   4.73 GB
localhost:5000/trusted-execution-clusters/trusted-cluster-operator  latest      a8653c9148df  16 minutes ago  582 MB
<none>                                                              <none>      9e7473e57366  16 minutes ago  6 GB

This issue covers the investigation why we have such a huge layers and if we can reduce their size. Each layer can be inspected with podman inspect <ID of the layer> or create a container from that image.

[Jakob-Naucke]

A bit more reasonable on my machine (debug build?)

REPOSITORY                                                   TAG         IMAGE ID      CREATED         SIZE
quay.io/trusted-execution-clusters/attestation-key-register  latest      690fca41d414  16 minutes ago  179 MB
<none>                                                       <none>      67393d1f7f77  16 minutes ago  3.65 GB
quay.io/trusted-execution-clusters/registration-server       latest      610d2a897e81  19 minutes ago  179 MB
<none>                                                       <none>      3de04948792f  19 minutes ago  3.68 GB
quay.io/trusted-execution-clusters/compute-pcrs              latest      df7a5a1bc4bc  23 minutes ago  180 MB
<none>                                                       <none>      146dbdd50c4c  23 minutes ago  3.53 GB
quay.io/trusted-execution-clusters/trusted-cluster-operator  latest      2777ae65c669  27 minutes ago  188 MB
<none>                                                       <none>      2d38e8a80b6d  27 minutes ago  3.67 GB

[alicefr]

Yeah, that's with debug, I will try to unset it on the machine I'm building since it always run out of space

[Jakob-Naucke]

Unconfirmed suspicion: half of that is the debug build itself, the other half is that building deps as lib and binary in separate layers is less space efficient than building in one layer. Speeds up development sooo much though. I'm not sure there's a lot to find in this issue here.