OSDF systemd services: use pelican-server everywhere

[matyasselmeci]

This avoids reliance on the magic config from the osdf binary.

[brianhlin]

LGTM

[jhiemstrawisc]

Does this mean we're using the pelican-server binary for services other than the cache?

[brianhlin]

@jhiemstrawisc we're already doing so for the origin:

1. https://github.com/PelicanPlatform/pelican/blob/main/systemd/pelican-origin.service#L7
2. https://github.com/PelicanPlatform/pelican/blob/main/systemd/osdf-origin.service#L7

Is there a reason we shouldn't?

[jhiemstrawisc]

Roping in @h2zh on this -- we just merged a change that enables CGO in the pelican-server binary, a decision that was predicated on our belief the pelican-server binary was not in use outside the controlled environment of our cache images (see issue #2485 and corresponding PR #2488).

I don't have a full grasp of potential consequences here, but I think enabling CGO means we lose having a static binary (haven't confirmed this) and need to worry more about distribution.

[jhiemstrawisc]

I'll follow up with a note that we do eventually want pelican-server to be used for all servers, but we didn't know that was already happening, and we thought we were kicking this CGO can down the road to figure out at a later time.

[h2zh]

One concern I have for this change is - now with CGO_ENABLED=1, pelican-server depends on libc and maybe more other c libraries. In deployment, though most Linux systems have libc by default, we may need to check that.

[jhiemstrawisc]

Following up Howard's comment:

$ ldd /usr/local/sbin/pelican-server 
	linux-vdso.so.1 (0x0000ffff9514d000)
	libresolv.so.2 => /lib64/libresolv.so.2 (0x0000ffff950ed000)
	libc.so.6 => /lib64/libc.so.6 (0x0000ffff94f3f000)
	/lib/ld-linux-aarch64.so.1 (0x0000ffff95110000)

[brianhlin]

@jhiemstrawisc @h2zh can we just change the origin + director + registry services to use the pelican binary until you guys are ready?

I checked the Dockerfile and that looked fine. Separately, we should probably move the osdf-* containers to the pelican and pelican-server binaries

[h2zh]

I second this plan. Now we should make pelican-server for Cache only

[jhiemstrawisc]

That sounds like a good plan to me. I'm guessing we should hold the 7.18 release for this?

[brianhlin]

Noting here that the CGO broke build infrastructure so that change is being rolled back. The change in this PR is now clear to go through with the 7.18 release