Troubleshooting

Support package

Subscription customers can generate a support package by executing the command grommunio-support and send the created support package to grommunio’s support for analysis to support@grommunio.com.

The archive generated is made available under the web root of grommunio admin archive, which is why it is stongly recommended to remove the generated support archive as soon as it has been transmitted to grommunio support. The support archive can be removed by accessing the console and executing the command rm -f /usr/share/grommunio-admin-web/grommunio-support.txz.

The information collected by grommunio-support contains:

• Crash relevant information (Coredumps)

• Disk layout (incl. LVM layout and SMART and Software RAID)

• Configuration dump (incl. /etc and more specific information e.g. from webserver)

• High-availability information

• Memory-related information

• Network configuration

• Process-relevant information

• Sysconfig information

Important

The support package might contain sensitive information. If this is a concern to you, it is recommended to prune specific private data from the generated archive before sending it to grommunio support. Support data is used only for diagnostic purposes and is considered confidential information.

Note

The support is solely available on the appliances provided by grommunio. On SUSE-based distributions it can also be made available by repository installation via the “grommunio-setup” package, which has a dependency on the package “supportutils”.

Installation logs

The setup wizard of the grommunio Appliance saves its log to /var/log/grommunio-setup.log. If, for example, the wizard fails the certificate generation, the reasons should be visible in that file.

System logs

The grommunio Appliance inherits system logging settings from systemd. Refer to the systemd-journald(8) manpage for details. To display logs, use the journalctl(8) command from a root login shell prompt:

journalctl -u gromox-http -n 1000
journalctl -f

Useful options that can independently be combined are:

• -f for follow mode

• -n to show that many of the most recent lines

• -u to limit the display to one particular service unit

Some logs are emitted to files rather than journald. These include:

URI Prefix	Process	Files
/dav	nginx	/var/log/nginx/grommunio-web-access.log, /var/log/nginx/grommunio-web-error.log
/dav	php-fpm	/var/log/grommunio-dav/grommunio-dav-php.log
/Microsoft-Server-ActiveSync	nginx	/var/log/nginx/grommunio-web-access.log, /var/log/nginx/grommunio-web-error.log
/Microsoft-Server-ActiveSync	php-fpm	/var/log/grommunio-sync/grommunio-sync-fpm.log
/web	nginx	/var/log/nginx/grommunio-web-access.log, /var/log/nginx/grommunio-web-error.log
/web	php-fpm	/var/log/gromox

Coredumps

The grommunio Appliance ships with systemd-coredump installed by default and is thus configured to emit dumps to /var/lib/systemd/coredump. If a crash occurred and left a dump behind in this directory, make available the dump file to the support team, and specify the version details of packages (e.g. the command rpm -qi gromox grommunio-index libexmdbpp0 will give Version: and Distribution: field). Note that because it is a complete memory dump, the files can contain sensitive information like usernames, passwords, mail texts, etc.

For systems not based on the appliance, consider the following points:

When systemd-coredump is installed, that package normally sets the systemd-coredump.socket to active, and places a fragment file in /usr/lib/sysctl.d/:

kernel.core_pattern = |/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %e

The presence of this fragment file will make this setting effective at the next boot. The presence of _another_ coredump middleware, including, but not limited to, Ubuntu apport or Fedora abrt, may cause multiple sysctl fragment files to compete and only one win. It is best not to have more than one such middleware.

Furthermore, systemd versions before 251 have a rather low dump limit of just 2 GB. To raise this, see /etc/systemd/coredump.conf.

It is possible to do without middleware and instead exercise the direct-to-file dump functionality from the Linux kernel, e.g. by setting the particular sysctl variable to:

kernel.core_pattern = /var/tmp/core.%E.%p

This emits files without compression, which may be beneficial during development but less so much for transferring dumps.