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.`clevis-systemd` no longer depends on `nc`
With this enhancement, the `clevis-systemd` package no longer depends on the `nc` package. The dependency did not work correctly when used with Extra Packages for Enterprise Linux (EPEL).
Description of problem:
clevis-systemd uses ncat in /usr/libexec/clevis-luks-askpass
However, the clevis-systemd RPM has dependency on nc
Not a big issue when only RHEL BaseOs & AppStream repos are in use; however, in EPEL the netcat RPM exists and it too provides nc, but NOT ncat binary clevis-systemd actually uses.
Version-Release number of selected component (if applicable):
clevis-systemd-13-3.el8
How reproducible:
100%
Steps to Reproduce:
1. Look at what the RPM requires
# rpm -qp --requires rhel-8-for-x86_64-appstream-rpms/Packages/c/clevis-
systemd-13-3.el8.x86_64.rpm | head -n 4
/bin/bash
/bin/sh
clevis-luks(x86-64) = 13-3.el8
nc
2. Looking at script the RPM provides, can see clearly it uses ncat (not nc)
# grep -n ncat /usr/libexec/clevis-luks-askpass
60: echo -n "+$pt" | ncat -U -u --send-only "$s"
3. And can see that nc is provided by both nmap-ncat (AppStream) & netcat (EPEL)
# dnf --repo rhel-8-for-x86_64-baseos-rpms --repo rhel-8-for-x86_64-appstream-rpms --repo epel whatprovides nc | grep -v @System | grep -B1 Repo
netcat-1.217-3.el8.x86_64 : OpenBSD netcat to read and write data across
connections using TCP or UDP
Repo : epel
--
nmap-ncat-2:7.70-4.el8.x86_64 : Nmap's Netcat replacement
Repo : rhel-8-for-x86_64-appstream-rpms
--
nmap-ncat-2:7.70-5.el8.x86_64 : Nmap's Netcat replacement
Repo : rhel-8-for-x86_64-appstream-rpms
Actual results:
With netcat from EPEL install (or even selected by dnf when both repos enabled) to meet the 'nc' require, clevis fails and are unable to boot/mount an NBDE system you just installed.
Expected results:
The requires should match the binary it is using to make sure the actual required binary is installed
Additional info:
Here can see just nc binary for netcat from EPEL
# rpm -qp --list ./netcat-1.217-3.el8.x86_64.rpm | grep bin/nc
/usr/bin/nc
And nmap-ncat provides
# rpm -q --list nmap-ncat | grep bin/nc
/usr/bin/nc
/usr/bin/ncat
Looking at provides, pehaps best to set require on nmap-ncat ... since ncat isn't explicitly listed in provides?
# rpm -q --provides nmap-ncat
nc
nc6
nmap-ncat = 2:7.70-5.el8
nmap-ncat(x86-64) = 2:7.70-5.el8
(In reply to James Hartsock from comment #0)
[snip]
> Looking at provides, pehaps best to set require on nmap-ncat ... since
> ncat isn't explicitly listed in provides?
This would make sense.
The latest clevis release upstream (v16) even dropped netcat altogether as a requirement, since systemd provides a utility that can do the task netcat was being used for and it's already available -- as this is a systemd unlocker.
(In reply to Sergio Correia from comment #1)
[snip]
> The latest clevis release upstream (v16) even dropped netcat altogether as a
> requirement, since systemd provides a utility that can do the task netcat
> was being used for and it's already available -- as this is a systemd
> unlocker.
Looks like this is link to your pull ... that should work too.
https://github.com/latchset/clevis/pull/266
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (clevis bug fix and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2022:1857
Description of problem: clevis-systemd uses ncat in /usr/libexec/clevis-luks-askpass However, the clevis-systemd RPM has dependency on nc Not a big issue when only RHEL BaseOs & AppStream repos are in use; however, in EPEL the netcat RPM exists and it too provides nc, but NOT ncat binary clevis-systemd actually uses. Version-Release number of selected component (if applicable): clevis-systemd-13-3.el8 How reproducible: 100% Steps to Reproduce: 1. Look at what the RPM requires # rpm -qp --requires rhel-8-for-x86_64-appstream-rpms/Packages/c/clevis- systemd-13-3.el8.x86_64.rpm | head -n 4 /bin/bash /bin/sh clevis-luks(x86-64) = 13-3.el8 nc 2. Looking at script the RPM provides, can see clearly it uses ncat (not nc) # grep -n ncat /usr/libexec/clevis-luks-askpass 60: echo -n "+$pt" | ncat -U -u --send-only "$s" 3. And can see that nc is provided by both nmap-ncat (AppStream) & netcat (EPEL) # dnf --repo rhel-8-for-x86_64-baseos-rpms --repo rhel-8-for-x86_64-appstream-rpms --repo epel whatprovides nc | grep -v @System | grep -B1 Repo netcat-1.217-3.el8.x86_64 : OpenBSD netcat to read and write data across connections using TCP or UDP Repo : epel -- nmap-ncat-2:7.70-4.el8.x86_64 : Nmap's Netcat replacement Repo : rhel-8-for-x86_64-appstream-rpms -- nmap-ncat-2:7.70-5.el8.x86_64 : Nmap's Netcat replacement Repo : rhel-8-for-x86_64-appstream-rpms Actual results: With netcat from EPEL install (or even selected by dnf when both repos enabled) to meet the 'nc' require, clevis fails and are unable to boot/mount an NBDE system you just installed. Expected results: The requires should match the binary it is using to make sure the actual required binary is installed Additional info: Here can see just nc binary for netcat from EPEL # rpm -qp --list ./netcat-1.217-3.el8.x86_64.rpm | grep bin/nc /usr/bin/nc And nmap-ncat provides # rpm -q --list nmap-ncat | grep bin/nc /usr/bin/nc /usr/bin/ncat Looking at provides, pehaps best to set require on nmap-ncat ... since ncat isn't explicitly listed in provides? # rpm -q --provides nmap-ncat nc nc6 nmap-ncat = 2:7.70-5.el8 nmap-ncat(x86-64) = 2:7.70-5.el8