On Mon, May 16, 2022 at 03:21:38PM -0400, Dan Streetman wrote: > On Mon, May 16, 2022 at 3:06 PM Steve Langasek > <steve.langa...@ubuntu.com> wrote:
> > As I mentioned at > > <https://lists.debian.org/debian-devel/2022/05/msg00047.html>, isc-dhcp is > > no longer used out of the box as the DHCP client in Ubuntu, on either > > desktop or server; server uses systemd-networkd's internal dhcp client > > implementation, and desktop uses NetworkManager's. > There are still users of 'dhclient', especially in some cloud environments. Aside from the cloud-init case, what are they using it for? We can't carry every piece of unmaintained software in perpetuity because of some user somewhere using it. We *should* aim to make sure that their use cases are cared for. So specifics would be helpful here. > I suspect there will be a demand for it until someone updates systemd > to be able to replace its functionality, with something like: > > $ networkctl dhclient eth0 > > That would require an upstream discussion to figure out the exact > usage and implement it, of course. > > > The only reason that > > isc-dhcp is still installed by default is for the initramfs: because we > > support nfsroot, iscsi, remote disk unlock via dropbear, etc. > > > > Several suggestions of path forward on support for dhcp in the initramfs, in > > no particular order: > > > > - work with klibc upstream to extend ipconfig to be a suitable DHCP client > > for the initramfs (requires DHCP support) > > > > - migrate to a systemd-based initramfs everywhere, and use systemd-networkd > > > > - Repackage isc-dhcp to provide an 'isc-dhcp-initramfs' package that no > > longer provides integration with the main system, so that it can continue > > to be used for initramfs without having a large ongoing support surface > > (but, this doesn't remove the need for security support) > > > > > > > We also have the udebs, but with subiquity being the installer now we > > > probably don't need to worry about these anymore? > > > > We definitely don't need to worry about udebs in future Ubuntu releases; > > they aren't even built in Launchpad in the current series. > > > > > rdeps at > > > https://people.canonical.com/~ubuntu-archive/germinate-output/ubuntu.kinetic/rdepends/isc-dhcp/ > > > > > Removing isc-dhcp would also allow us to reduce the need of old compat > > > src:bind9-libs package, probably even drop it. > > > > Ugh > > > > > Could we perhaps start with phasing out the client, get its rdeps to > > > use alternatives, and then stop building it, and eventually get to the > > > server? This could be a lot of work, as I said, isc-dhcp is a classic, > > > but if upstream is shifting its focus elsewhere, soon we will be > > > alone. > > > > I think you'll find that phasing out the client is much more work than > > phasing out the server, given the ways the client is integrated in other > > packages. > > > > > Reverse-Depends > > > * cloud-init > > > > Another example of client integration that's going to require attention; > > cloud-init uses isc-dhcp-client to be able to query specific dhcp attributes > > in early boot used to identify the cloud metadata service. > > > > > * dracut-network > > > * isc-dhcp-client-ddns [amd64 arm64 armhf ppc64el s390x] > > > * libguestfs0 [amd64 arm64 armhf ppc64el s390x] > > > * netscript-2.4 > > > * network-manager [amd64 arm64 armhf ppc64el s390x] > > > > I think network-manager's dependency on isc-dhcp-client is vestigial. You > > will not find any instances of isc-dhcp-client running on an Ubuntu 22.04 > > desktop system. > > > > Cheers, > > -- > > Steve Langasek Give me a lever long enough and a Free OS > > Debian Developer to set it on, and I can move the world. > > Ubuntu Developer https://www.debian.org/ > > slanga...@ubuntu.com vor...@debian.org > > -- > > ubuntu-devel mailing list > > ubuntu-devel@lists.ubuntu.com > > Modify settings or unsubscribe at: > > https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel Thanks, -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer https://www.debian.org/ slanga...@ubuntu.com vor...@debian.org
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