F35 Change: Debuginfod By Default (Self-Contained Change proposal)
by Ben Cotton
https://fedoraproject.org/wiki/Changes/DebuginfodByDefault
== Summary ==
Fedora users / developers who need to debug/trace distro binaries can
make use of the recently activated elfutils-debuginfod servers to
automatically fetch debugging data and source code, instead of having
to use `# sudo dnf` commands.
== Owner ==
* Name: [[User:fche| Frank Ch. Eigler]]
* Email: fche(a)redhat.com
== Detailed Description ==
Numerous fedora debugging-type tools have built-in capabilities to use
the [https://sourceware.org/elfutils/Debuginfod.html debuginfod]
protocol to fetch debuginfo/source code automatically. We would like
to activate a setting so that Fedora's debuginfod servers are
automatically used, rather than requiring hand-editing individual
users' dot files.
== Feedback ==
There has existed
[https://www.spinics.net/lists/fedora-devel/msg279002.html broad
interest] in a Fedora debuginfod server since the project was proposed
/ announced in 2020, and several distros already operate public
servers of this nature. Some of the distros configure their
installations by default to talk to those servers, some do not.
Turning on this by default has some limited privacy implications.
Some Debian users have
[https://lists.debian.org/debian-devel/2021/02/msg00262.html expressed
concerns] that this facility "calls home" during debugging, so it may
expose a limited amount of information about what a user is debugging.
The information is limited to the build-id and source code file names
of programs being debugged, and is only sent to the servers if their
machine lacks locally installed debuginfo. Whether this should be
opt-in or opt-out and how has been resolved there via an install-time
query to the sysadmin. In contrast, on OpenSUSE Tumbleweed, it is
[https://build.opensuse.org/request/show/879926 simply defaulted-on],
and we have heard of no controversy.
We anticipate discussing this topic on the mailing list, and noting it
in the release notes either way.
== Benefit to Fedora ==
This will improve developers' experience.
It may reduce download server burden, as only individual
ELF/DWARF/source files are downloaded rather than entire `-debuginfo`
and `-debugsource` RPMs.
It would help Fedora catch up to other distros who put up `debuginfod`
servers already. :-)
== Scope ==
* Proposal owners:
The work could consist one extra parameter in the `elfutils.spec`
`%configure`. Its effect is to arrange for the
`elfutils-debuginfod-client` RPM
to install an `/etc/profile.d` file that sets the `DEBUGINFOD_URLS`
environment variable automatically to
`https://debuginfod.fedoraproject.org/`. (At the time of this
writing, the _staging_ server is getting ready for testing:
`https://debuginfod.stg.fedoraproject.org/`.)
* Other developers: None - relevant code has been previously upstreamed!
* Release engineering: None - our team is operating the
`debuginfod[.stg].fedoraproject.org` VMs.
* Policies and guidelines: N/A (not needed for this Change)
* Trademark approval: N/A (not needed for this Change)
* Alignment with Objectives: N/A
== Upgrade/compatibility impact ==
None.
Note that these servers index all active Fedora releases (32-), all
architectures, so users of those versions can already set
`DEBUGINFOD_URLS` manually to take advantage.
== How To Test ==
* Install `elfutils-debuginfod-client`
* Open arbitrary fedora binary via gdb.
** Admire the immediate downloading of debuginfo and source code.
* Run `eu-stack -v -p $pid` for an arbitrary process.
** Admire the immediate downloading of debuginfo to give precise file:line data.
== User Experience ==
Primarily: users running debuggers, profilers, tracing tools on
internet-capable machines can work immediately, without switching to
privileged users and fragile manual `dnf` commands to install this
data.
== Dependencies ==
The `debuginfod` servers at `fedora-infra` need to be up.
== Contingency Plan ==
* Contingency mechanism: change the elfutils-debuginfod-client subrpm
to not set the default `DEBUGINFOD_URLS` environment variable for all
users. In the case of a server outage, the debugger tools revert to
debuginfo-less operation, prior to this feature.
* Contingency deadline: shortly before freeze
* Blocks release? No
== Documentation ==
There is upstream documentation in the debugging tools as well as
associated with the client code / cli tooling. What our Release Notes
would focus on however is the _automatic activation_ of this facility
via the environment variable.
== Release Notes ==
TBD.
--
Ben Cotton
He / Him / His
Senior Program Manager, Fedora & CentOS Stream
Red Hat
TZ=America/Indiana/Indianapolis
3 weeks
some man pages have bugs, can't be grep'd
by Chris Murphy
I've been seeing this since clean installing Fedora 30. I don't recall
ever seeing it before, including on a Fedora 29 -> Fedora 30 upgraded
system (is now the clean installed system).
[chris@flap ~]$ man rpm | grep -C 10 rpmverbosity
<standard input>:176: warning [p 3, 0.8i]: cannot adjust line
[chris@flap mantest]$ man rpm >rpm.stdout 2>rpm.stderr
[chris@flap mantest]$ ll
-rw-rw-r--. 1 chris chris 62 Jul 16 14:24 rpm.stderr
-rw-rw-r--. 1 chris chris 28498 Jul 16 14:24 rpm.stdout
Is this a bug that should be reported against rpm or something else?
I'm certain I've seen it in other man pages, but offhand I can't find
another example.
--
Chris Murphy
3 months
Unretire ulogd (or another NFLOG logger?)
by Chris Adams
I'd like to use NFLOG to log firewall drops (so that the kernel message
log isn't spammed by them), but it doesn't appear there's anything
currently in Fedora that can read that other than "tcpdump -i nflog".
It looks like ulogd was retired a while back because it only had a SysV
init script and nobody stepped up to convert it to systemd (which should
be really simple, since the old init script is pretty much a textbook
template of a SysV init script).
Am I missing anything? Is that all it needs? Is there another NFLOG
logger daemon?
--
Chris Adams <linux(a)cmadams.net>
4 months
RISC-V -- are we ready for more, and what do we need to do it?
by Matthew Miller
Hi all! I just got back from Open Source Summit, several of the talks I
found interesting were on RISC-V -- a high-level one about the
organizational structure, and Drew Fustini's more technical talk.
In that, he noted that there's a Fedora build *, but it isn't an official
Fedora arch. As I understand it, the major infrastructure blocker is simply
that there isn't server-class hardware (let alone hardware that will build
fast enough that it isn't a frustrating bottleneck).
So, one question is: if we used, say, ARM or x86_64 Amazon cloud instances
as builders, could we build fast enough under QEMU emulation to work? We
have a nice early advantage, but if we don't keep moving, we'll lose that.
But beyond that: What other things might be limits? Are there key bits of
the distro which don't build yet? Is there a big enough risc-v team to
respond to arch-specific build failures? And, do we have enough people to do
QA around release time?
* see http://fedora.riscv.rocks/koji/
--
Matthew Miller
<mattdm(a)fedoraproject.org>
Fedora Project Leader
1 year
Conflicting build-ids in nekovm and haxe
by Andy Li
Hi list,
Re. https://bugzilla.redhat.com/show_bug.cgi?id=1896901
Since haxe-4.1.3-4 and nekovm-2.3.0-4, both nekovm and haxe packages contains "/usr/lib/.build-id/b0/aed4ddf2d45372bcc79d5e95d2834f5045c09c".
The nekovm one is a symlink to "/usr/bin/neko". The haxe one to "/usr/bin/haxelib".
Both the neko and haxelib binaries are built with libneko, with a nearly identical main.c with the only difference of the present of neko bytecode embedded as a byte array (neko: the byte array is null; haxelib: the byte array is the haxelib neko bytecode).
I'm not sure how to resolve it.
Please advice.
Best regards,
Andy
1 year, 1 month
can't install package pipewire-jack-audio-connection-kit
by Martin Gansser
Hi,
when trying to install pipewire-jack-audio-connection-kit i get this error message:
# dnf -y install pipewire-jack-audio-connection-kit
Last metadata expiration check: 1:39:52 ago on Thu Dec 31 14:10:39 2020.
Error:
Problem: problem with installed package jack-audio-connection-kit-1.9.14-5.fc33.x86_64
- package pipewire-jack-audio-connection-kit-0.3.13-4.fc33.i686 conflicts with jack-audio-connection-kit provided by jack-audio-connection-kit-1.9.14-5.fc33.x86_64
- conflicting requests
- package pipewire-jack-audio-connection-kit-0.3.15-2.fc33.i686 conflicts with jack-audio-connection-kit provided by jack-audio-connection-kit-1.9.14-5.fc33.x86_64
- package pipewire-jack-audio-connection-kit-0.3.13-4.fc33.x86_64 conflicts with jack-audio-connection-kit provided by jack-audio-connection-kit-1.9.14-5.fc33.x86_64
- package pipewire-jack-audio-connection-kit-0.3.15-2.fc33.x86_64 conflicts with jack-audio-connection-kit provided by jack-audio-connection-kit-1.9.14-5.fc33.x86_64
(try to add '--allowerasing' to command line to replace conflicting packages or '--skip-broken' to skip uninstallable packages)
How can i fix this ?
Regards
Martin
1 year, 3 months
