Sysvsem in php 8.1

[ChristopherChemist]

Good day,
I'm running WHM 110.0.2 on AlmaLinux v8.7.0 STANDARD vzcontainer. The PHP version is 8.1. NextCloud Hub was just updated to the latest version, 26.0.1. It gives a warning:
This instance is missing some recommended PHP modules. For improved performance and better compatibility it is highly recommended to install them.

• sysvsem

This warning was also given with version 26.0.0.

The cPanel documentation indicates that the sysvsem extension is already installed, but I can't confirm that. I suspect that something changed with PHP 8.0. There is a
SysvSemaphore class mentioned at www.php.net/manual/en/class.sysvsemaphore.php, "A fully opaque class which replaces a sysvsem resource as of PHP 8.0.0."

Perhaps the cPanel documentation, mentioned above, shouldn't include sysvsem, and perhaps NextCloud is mistaken to give the above warning. Since others are probably wondering the same thing, it may be useful to figure out what's going on here.
Thanks!
Chris

 

[cPRex]

Hey there! sysvsem is a default included with PHP, so the best way to see that is to create a PHP info page on your domain and then you'll see this when visiting that page in a browser:

'--enable-sysvsem=shared'

I did confirm this on a PHP 8.1 system - let me know if you need more details from my end!

 

[Barry Johnson]

Using cPanel 110.0.5 and PHP 8.1 for my NextCloud instance. And 'sysvsem' seems to be missing. Extracting from the "phpinfo" page:

PHP Version 8.1.18
System: Linux ******* 3.10.0-1160.88.1.el7.x86_64 #1 SMP Tue Mar 7 15:41:52 UTC 2023 x86_64
Build Date: May 2 2023 21:19:36
Build System: Linux hou-1 5.3.18-150300.59.98-default #1 SMP Thu Oct 13 08:52:00 UTC 2022 (dfcde7e) x86_64 x86_64 x86_64 GNU/Linux
Configure Command: './configure' ... '--disable-sysvsem' ...

When I open a terminal and type 'php -m' I get the following, with no 'sysvsem' listed:

[PHP Modules]
apcu
bcmath
bz2
Core
ctype
curl
date
dom
exif
fileinfo
filter
ftp
gd
gmp
hash
iconv
imagick
imap
intl
json
libxml
mbstring
mysqli
mysqlnd
openssl
pcntl
pcre
PDO
pdo_mysql
pdo_sqlite
Phar
posix
readline
Reflection
session
SimpleXML
SPL
sqlite3
standard
tokenizer
xml
xmlreader
xmlwriter
xsl
Zend OPcache
zip
zlib

[Zend Modules]
Zend OPcache

 

[cPRex]

@Barry Johnson - is it possible that has been added to the disabled functions on that machine? sysvsem is included by default and also enabled on cPanel machines in the standard configuration.

 

[Barry Johnson]

Reviewed stuff in MultiPHP Editor under both tabs, and found nothing that references sysvsem.

I have no /etc/cpanel/ea4/phpini_directives for custom directives.

Didn't see anything in .htaccess. or .user.ini files related to it.

I thought the Build Date (May 2 2023 21:19:36) and Build System (Linux hou-1) I posted earlier, indicates where, when, and how the code was built. And that's before the code gets to my machine. And I don't recall ever doing anything "special" to fiddle with what is installed on my machine, especially PHP-wise.

Fwiw, here's the complete Configure Command from the PHPInfo() page so you can check everything that the packaging generation did - and didn't!? - do:

'./configure' '--build=x86_64-redhat-linux-gnu' '--host=x86_64-redhat-linux-gnu' '--program-prefix=' '--disable-dependency-tracking' '--prefix=/opt/cpanel/ea-php81/root/usr' '--exec-prefix=/opt/cpanel/ea-php81/root/usr' '--bindir=/opt/cpanel/ea-php81/root/usr/bin' '--sbindir=/opt/cpanel/ea-php81/root/usr/sbin' '--sysconfdir=/opt/cpanel/ea-php81/root/etc' '--datadir=/opt/cpanel/ea-php81/root/usr/share' '--includedir=/opt/cpanel/ea-php81/root/usr/include' '--libdir=/opt/cpanel/ea-php81/root/usr/lib64' '--libexecdir=/opt/cpanel/ea-php81/root/usr/libexec' '--localstatedir=/opt/cpanel/ea-php81/root/var' '--sharedstatedir=/opt/cpanel/ea-php81/root/var/lib' '--mandir=/opt/cpanel/ea-php81/root/usr/share/man' '--infodir=/opt/cpanel/ea-php81/root/usr/share/info' '--cache-file=../config.cache' '--with-libdir=lib64' '--with-config-file-path=/opt/cpanel/ea-php81/root/etc' '--with-config-file-scan-dir=/opt/cpanel/ea-php81/root/etc/php.d' '--disable-debug' '--with-password-argon2=/opt/cpanel/libargon2' '--with-pic' '--without-pear' '--with-bz2' '--with-freetype' '--with-xpm' '--without-gdbm' '--with-gettext' '--with-iconv' '--with-jpeg' '--with-openssl' '--with-zlib' '--with-layout=GNU' '--enable-exif' '--enable-ftp' '--enable-sockets' '--with-kerberos' '--enable-shmop' '--with-sodium=shared' '--with-libxml' '--with-system-tzdata' '--with-mhash' '--enable-fpm' '--with-fpm-systemd' '--libdir=/opt/cpanel/ea-php81/root/usr/lib64/php' '--without-mysqli' '--disable-pdo' '--enable-pcntl' '--disable-gd' '--disable-dom' '--disable-dba' '--without-unixODBC' '--disable-opcache' '--disable-xmlreader' '--disable-xmlwriter' '--without-sqlite3' '--disable-phar' '--disable-fileinfo' '--disable-json' '--without-pspell' '--without-curl' '--disable-posix' '--disable-xml' '--disable-simplexml' '--disable-exif' '--without-gettext' '--without-iconv' '--disable-ftp' '--without-bz2' '--disable-ctype' '--disable-shmop' '--disable-sockets' '--disable-tokenizer' '--disable-sysvmsg' '--disable-sysvshm' '--disable-sysvsem' '--without-gmp' '--disable-calendar' 'build_alias=x86_64-redhat-linux-gnu' 'host_alias=x86_64-redhat-linux-gnu' 'PKG_CONFIG_PATH=/opt/cpanel/ea-php81/root/usr/lib64/pkgconfig:/opt/cpanel/ea-php81/root/usr/share/pkgconfig:/usr/lib64/pkgconfig:/opt/cpanel/ea-openssl11/lib64/pkgconfig:/opt/cpanel/ea-libxml2/lib64/pkgconfig:/opt/cpanel/ea-libicu/lib/pkgconfig:/opt/cpanel/ea-oniguruma/lib64/pkgconfig:/opt/cpanel/libargon2/lib64/pkgconfig:/usr/lib64/pkgconfig' 'CFLAGS=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -fno-strict-aliasing -Wno-pointer-sign ' 'CXXFLAGS=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic' 'KERBEROS_CFLAGS=-I/usr/include' 'KERBEROS_LIBS=-L/usr/lib64' 'OPENSSL_CFLAGS=-I/opt/cpanel/ea-openssl11/include' 'OPENSSL_LIBS=-L/opt/cpanel/ea-openssl11/lib -lssl -lcrypto -lresolv' 'CURL_CFLAGS=-I/opt/cpanel/libcurl/include' 'CURL_LIBS=-L/opt/cpanel/libcurl/lib64 -lcurl' 'JPEG_CFLAGS=-I/usr/include' 'JPEG_LIBS=-L/usr/lib64 -ljpeg' 'SASL_CFLAGS=-I/usr/include' 'SASL_LIBS=-L/usr/lib64' 'ARGON2_CFLAGS=-I/opt/cpanel/libargon2/include' 'XSL_CFLAGS=-I/opt/cpanel/ea-libxml2/include/libxml2' 'XSL_LIBS=-L/opt/cpanel/ea-libxml2/lib64 -lxml2' 'LIBZIP_CFLAGS=-I/opt/cpanel/ea-libzip/include' 'LIBZIP_LIBS=-L/opt/cpanel/ea-libzip/lib64 -lzip'

 

[tholler]

Hello,
I also can confirm the problem, that sysvsem is shown as disabled in phpinfo.php and I don't find a way to enable it.

The problem occoures under php81 fpm.

Regards
Thorsten

 

[cPRex]

Could one of you please submit a ticket on this? I'm not able to reproduce this on a test system, so we'd need to see it in action.

 

[quietFinn]

In an account with PHP 8.1, in phpinfo, Configure Command, I see '--enable-sysvsem=shared' ', but if I turn PHP-FPM ON for that account I see '--disable-sysvsem'

 

[Barry Johnson]

In an account with PHP 8.1, in phpinfo, Configure Command, I see '--enable-sysvsem=shared' ', but if I turn PHP-FPM ON for that account I see '--disable-sysvsem'

Indeed, turned off PHP-FPM for my NextCloud-hosting account and checked phpinfo() and also found "sysvsem" is now "shared".

 

[Barry Johnson]

Sorry, should've checked to include it in my previous post: turned off FPM on all accounts, including cPanel daemons on the Service manager panel. phpinfo() shows "shared" for the NextCloud-hosting account. But NextCloud's Adminsitration Overview page still shows `sysvsem` as missing!?

 

[cPRex]

It's time to submit a ticket for this one since we've been chipping away at it for a few weeks. Can you create a ticket and then post the number here so I can follow along?

 

[Barry Johnson]

I'd be prepared to do that, but I'm guessing you'd like access to my server. I'm currently focused on my CentOS-to-AlmaLinux migration. (Alas, scripted update not an option for VPS.) Maybe in a week or two if all goes well ... or, perhaps, someone else is in a position to help before then?

 

[Barry Johnson]

Getting back to this: Ticket #95087411

 

[cPRex]

Thanks for that - I'm following along with that ticket now.

 

[Barry Johnson]

The solution is that, under PHP-FPM, the php81-php-process extension needs to be enabled.