Upgrade from 26 to 27 fails, rollback as well

Running nc-update-nextcloud
Current   Nextcloud version 26.0.12.2
Available Nextcloud version 27.1.7
Download Nextcloud 27.1.7...
Back up current instance...
check free space...
Maintenance mode enabled
backup database...
backup files...
backup /var/www/nextcloud-bkp_20240301_1709323522.tar.gz generated
Maintenance mode disabled
Storing backup at '/var/www/nextcloud-bkp_20240301_1709323522-26.0.12.2.tar.gz'...
Install Nextcloud 27.1.7...
Fix permissions...
Upgrade...
Nextcloud is not installed - only a limited number of commands are available
Command "upgrade" is not defined.
Abort
Clean up...
Rolling back to backup /var/www/nextcloud-bkp_20240301_1709323522-26.0.12.2.tar.gz...
check free space...
extracting backup file /var/www/nextcloud-bkp_20240301_1709323522-26.0.12.2.tar.gz...
restore files...
rm: cannot remove '/var/www/nextcloud': Directory not empty
Cleanup...
Rollback failed! Data left at /var/www/recovery/ncp-data.Oet4GK
Done. Press any key... 

System information

Here's the output of ncp-report, although it's probably not useful anymore at this point since it didn't reinstall nextcloud:

NextcloudPi diagnostics

``` grep: /var/www/nextcloud/config/config.php: No such file or directory grep: /etc/apache2/sites-available/nextcloud.conf: No such file or directory NextcloudPi version v1.53.1 NextcloudPi image NextCloudPi_10-03-21 OS Debian GNU/Linux 11. 5.10.103-v8+ (aarch64) automount no USB devices sda sdb datadir (doesn't exist) rootfs usage 5.9G/118G swapfile /var/swap dbdir /var/lib/mysql Nextcloud check error HTTPD service up PHP service up MariaDB service up Redis service up HPB service down Postfix service up Internet check ok Public IPv4 ***REMOVED SENSITIVE VALUE*** Public IPv6 ***REMOVED SENSITIVE VALUE*** Port 80 open Port 443 open IP ***REMOVED SENSITIVE VALUE*** Gateway ***REMOVED SENSITIVE VALUE*** Interface enxb827eb96a6b1 Certificates ***REMOVED SENSITIVE VALUE*** NAT loopback no Uptime 1day ```

Nextcloud configuration

``` Could not open input file: /var/www/nextcloud/occ ```

HTTPd logs

``` [Fri Mar 01 00:00:06.180759 2024] [ssl:warn] [pid 122255:tid 548003521600] AH01909: localhost:4443:0 server certificate does NOT include an ID which matches the server name [Fri Mar 01 00:00:06.181333 2024] [ssl:error] [pid 122255:tid 548003521600] AH02217: ssl_stapling_init_cert: can't retrieve issuer certificate! [subject: CN=arm-build.pitowers.org / issuer: CN=arm-build.pitowers.org / serial: 7DB21552E75827D0B5E58524BE67A36F9E0AA17A / notbefore: May 7 16:05:36 2021 GMT / notafter: May 5 16:05:36 2031 GMT] [Fri Mar 01 00:00:06.181375 2024] [ssl:error] [pid 122255:tid 548003521600] AH02604: Unable to configure certificate localhost:4443:0 for stapling [Fri Mar 01 00:00:06.238046 2024] [mpm_event:notice] [pid 122255:tid 548003521600] AH00489: Apache/2.4.56 (Debian) OpenSSL/1.1.1w configured -- resuming normal operations [Fri Mar 01 00:00:06.238134 2024] [core:notice] [pid 122255:tid 548003521600] AH00094: Command line: '/usr/sbin/apache2' ```

Database logs

``` 2024-02-29 14:17:29 0 [Note] Starting crash recovery... 2024-02-29 14:17:29 0 [Note] Crash recovery finished. 2024-02-29 14:17:29 0 [Note] Server socket created on IP: '127.0.0.1'. 2024-02-29 14:17:30 0 [Note] Reading of all Master_info entries succeeded 2024-02-29 14:17:30 0 [Note] Added new Master_info '' to hash table 2024-02-29 14:17:30 0 [Note] /usr/sbin/mysqld: ready for connections. Version: '10.3.39-MariaDB-0+deb10u2' socket: '/run/mysqld/mysqld.sock' port: 3306 Debian 10 2024-02-29 15:02:44 0 [Note] InnoDB: Buffer pool(s) load completed at 240229 15:02:44 2024-02-29 15:03:03 11 [Warning] Aborted connection 11 to db: 'nextcloud' user: 'ncadmin' host: 'localhost' (Got an error reading communication packets) 2024-02-29 16:57:59 0 [Note] /usr/sbin/mysqld (initiated by: unknown): Normal shutdown 2024-02-29 16:57:59 0 [Note] Event Scheduler: Purging the queue. 0 events 2024-02-29 16:57:59 0 [Note] InnoDB: FTS optimize thread exiting. 2024-02-29 16:58:00 0 [Note] InnoDB: Starting shutdown... 2024-02-29 16:58:00 0 [Note] InnoDB: Dumping buffer pool(s) to /var/lib/mysql/ib_buffer_pool 2024-02-29 16:58:00 0 [Note] InnoDB: Instance 0, restricted to 4096 pages due to innodb_buf_pool_dump_pct=25 2024-02-29 16:58:00 0 [Note] InnoDB: Buffer pool(s) dump completed at 240229 16:58:00 2024-02-29 16:58:18 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2024-02-29 16:58:18 0 [Note] InnoDB: Shutdown completed; log sequence number 42018538067; transaction id 73407460 2024-02-29 16:58:21 0 [Note] /usr/sbin/mysqld: Shutdown complete ```

grep: /var/www/nextcloud/config/config.php: No such file or directory

Nextcloud logs

``` tail: cannot open '/nextcloud.log' for reading: No such file or directory ```

Start with the nc-update-nextcloud command and trace the upgrade and rollback steps shown in the report, including the backup archive and /var/www/recovery/ncp-data.Oet4GK. Reproduce the failure if possible and determine why the Nextcloud upgrade is unavailable and why rollback cannot remove /var/www/nextcloud; done means both paths complete without leaving the instance unusable.