[yocto] Generation of images when using repository of signed rpm packages

[Iván Castell]

Hello forum.

I have two questions related with the generation of images when the distro
is configured to use a repository of rpm packages signed with gpg.

First question: after running the "bitbake my-image.bb" command, the build
process stops with this message of error:

ERROR: myimage-1.0-r0 do_rootfs: [log_check] myimage: found 1 error message
in the logfile:
[log_check] Failed to synchronize cache for repo 'yocto-rpm', disabling.

Surprisingly, this error is only raised when the http server (that serving
the rpm packages, i.e. nginx) is stopped (not listening). If the http
server is started (listening), then the error message doesn't appear and
the generation of the image works fine. I don't understand why the build
process needs syncronizing with the rpm repository to build the image.

Second question: I am using dnf client to manage rpm packages. My layer
creates a dnf_%.bbappend file to include this configuration file in the
image built:

$ cat yocto-rpm.repo
[yocto-rpm]
name=Rocko Yocto Repo
baseurl=http://<HTTP_SERVER_IP>/rpm
enabled=1
gpgcheck=1

If the variable gpgcheck=0, then the image is build fine even if the http
server is stopped. How is that possible? Is yocto analyzing content of a
file installed on the final image to define how the build process is
managed?

Thank you in advance for your time! :)



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