Raspberry Pi Debian GNU/Linux 11 (bullseye)
Nextcloud 27.0.0
Apache/2.4.56 (Debian)
PHP Version 8.1.20
Using the web interface I upgraded from 26.0.3 to 27.0.0 and now I have the message:
The database is used for transactional file locking. To enhance performance, please configure memcache, if available. See the documentation 
for more information.
I found that I had to install Redis which I did not need before:
sudo apt update
sudo apt upgrade
sudo apt install redis-server php-redis
I changed the next lines in /etc/redis/redis.conf to prepare for socket mode:
requirepass secret
unixsocket /var/run/redis/redis-server.sock
port 0
unixsocketperm 760
Testing redis:
First using user pi to receive an error which is just fine because pi has no rights to /run/redis/redis-server.sock
redis-cli -a secret -s /run/redis/redis-server.sock ping
Warning: Using a password with ‘-a’ or ‘-u’ option on the command line interface may not be safe.
Could not connect to Redis at /run/redis/redis-server.sock: Permission denied
From the root account after sudo -i
redis-cli -a secret -s /run/redis/redis-server.sock ping
Warning: Using a password with ‘-a’ or ‘-u’ option on the command line interface may not be safe.
PONG
use www-data to ping
sudo -u www-data redis-cli -a secret -s /run/redis/redis-server.sock ping
Warning: Using a password with ‘-a’ or ‘-u’ option on the command line interface may not be safe.
PONG
use www-data to create a value for test
sudo -u www-data redis-cli -a secret -s /run/redis/redis-server.sock set test something
Warning: Using a password with ‘-a’ or ‘-u’ option on the command line interface may not be safe.
OK
redis-cli -a secret -s /run/redis/redis-server.sock get test
Warning: Using a password with ‘-a’ or ‘-u’ option on the command line interface may not be safe.
“something”
So far so good, this works but I can not get Nextcloud working with Redis.
End of /var/www/nextcloud/config/config.php
‘filelocking.enabled’ => true,
‘memcache.local’ => ‘\OC\Memcache\APCu’,
‘memcache.locking’ => ‘\OC\Memcache\Redis’,
‘redis’ =>
array (
‘host’ => ‘/var/run/redis/redis-server.sock’,
‘port’ => 0,
‘timeout’ => 0.0,
‘password’ => ‘secret’,
),
);
Restarting redis and apache does not help. Even rebooting does not help. The message stays and the command line commands are oke after reboot.
I checked the logging in the web GUI but there are no messages after the upgrade from 26.0.3 to 27.0.0
I must be missing something but I can not find it.
