users March 2023

users@lists.fedoraproject.org

70 participants
65 discussions

Fedora 37 installer only sees 1 of 3 4TB drives on NVMe card
by Ranjan Maitra 02 Mar '23

02 Mar '23

Hello, I have 3 NVMe PCIe M.2 SSD part number CT4000P3PSSD8 on my card. However, the Fedora installer only sees one of these three SSDs. I tried looking at them using nvme list and only see one (and two separate 256 GB SSDs). I looked into the case, and all three 4 TB drives are there, with lights blinking. I am sorry not to give more relevant info right now (I do not know what to give), but the machine shipped by Dell (the 4 TB drives were purchased separately) is Precision 7920 Tower XCTO Base (it came with the 2 256 GB SSDs). Many thanks, and best wishes, Ranjan

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Enabling Apache HTTP/2 => Too many open files error
by Richard W.M. Jones 02 Mar '23

02 Mar '23

I fixed this now, but I could find virtually no documentation about it online, so I'm writing this email to document what surely must be a common problem ... I wanted to enable HTTP/2 support in Apache on Fedora 38. I followed the documentation here which worked [although it's way more complicated than it needs to be, why isn't HTTP/2 the default out of the box?] https://httpd.apache.org/docs/2.4/howto/http2.html Anyway the problem I had was that the server worked fine provided there were not too many clients (and by "too many" I mean a simple load test with 4-16 clients failed). Apache randomly threw 403 Forbidden errors, but with less load it gave a normal (2xx) response. The first problem is the error is misleading: [Wed Feb 22 13:24:52.013780 2023] [core:error] [pid 3047850:tid 3047899] (24)Too many open files: [remote 192.168.0.139:53738] AH00132: file permissions deny server access: /var/www/html/[filename] If you concentrate on the second part "file permissions deny server access" -- as I did -- then you'll be looking at file permissions, SELinux, restorecon, ausearch etc. That's a red herring, there is no permissions problem. The real error is the first part "Too many open files". It turns out that the default open file limit (1024!) is too low. To change this and fix the problem: # systemctl edit httpd This creates an "override" file to which you should add (or you could just create this file directly): # cat /etc/systemd/system/httpd.service.d/override.conf [Service] LimitNOFILE=65536 and then restart Apache for the change to take effect. Why on earth Apache needs > 1024 open files to serve a dozen clients is not clear at all. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top

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Bluetooth LE (BTLE) GATT development for Fedora.
by Steve Underwood 01 Mar '23

01 Mar '23

Hi, Is anyone familiar with BTLE GATT programming for Fedora (or any other Linux)? I've done some Bluetooth classic programming for Fedora in the past, and that's very straightforward, using the standard Bluez library and header files installed by Fedora RPMs. Now I am trying to do GATT application development and it seems the only way I can do this is to download the Bluez source code, delve around inside to find the relevant bits, and work from there. Am I missing something? Should I be able to do an RPM install of a GATT development development kit? Regards, Steve

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Fedora (37) i686 32-bit virt-p2v ?
by Franta Hanzlik 28 Feb '23

28 Feb '23

Hi, I want to virtualize any old i686 Windows XP 32-bit physical PC on F37. Result from building virt-p2v boot disk: # virt-p2v-make-disk -o /dev/sde --arch i686 virt-p2v-make-disk: cannot find /usr/lib64/virt-p2v/virt-p2v.i686.xz You used the '--arch' option, so it’s likely that you will need to build a virt-p2v.i686 binary yourself. See p2v-building(1) section BUILDING i686 32 BIT VIRT-P2V for help. It seems as virt-p2v.i686.xz blob isn't in Fedora (nor 'p2v-building' man page, but it can be found easily). What now? I see two possibilities: 1) it is somewhere on Fedora, but not in core repos 2) I have to build it myself - but have no idea about optimal way. 'p2v-building' man page recommends 32-bit chroot (without details), or (on Fedora) use 'mock' - but it seems it is not there anymore. Has anyone done this? What optimal way would you recommend? --- TIA, Franta Hanzlik

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recommended partition for swap with 0.5 TB memory
by Ranjan Maitra 28 Feb '23

28 Feb '23

Hi, I am trying to install Fedora on to a new machine that has 0.5 TB RAM. Hard drives are 256 GB for / and friends, and 2 TB for /home partition. In the past, it used to be suggested that swap be twice that of RAM: this later changed to the same amount, and now it is very unclear (to me) because I have not tracked the latest recommendations. Anyway, what would you suggest? The machine is a Dell Precision 7920 with 28 cores/56 threads. Many thanks for any suggestions, and best wishes, Ranjan

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