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coredump.conf(5)


NAME

   coredump.conf, coredump.conf.d - Core dump storage configuration files

SYNOPSIS

   /etc/systemd/coredump.conf

   /etc/systemd/coredump.conf.d/*.conf

   /run/systemd/coredump.conf.d/*.conf

   /usr/lib/systemd/coredump.conf.d/*.conf

DESCRIPTION

   These files configure the behavior of systemd-coredump(8), a handler
   for core dumps invoked by the kernel. Whether systemd-coredump is used
   is determined by the kernel's kernel.core_pattern sysctl(8) setting.
   See systemd-coredump(8) and core(5) pages for the details.

CONFIGURATION DIRECTORIES AND PRECEDENCE

   The default configuration is defined during compilation, so a
   configuration file is only needed when it is necessary to deviate from
   those defaults. By default, the configuration file in /etc/systemd/
   contains commented out entries showing the defaults as a guide to the
   administrator. This file can be edited to create local overrides.

   When packages need to customize the configuration, they can install
   configuration snippets in /usr/lib/systemd/*.conf.d/. Files in /etc/
   are reserved for the local administrator, who may use this logic to
   override the configuration files installed by vendor packages. The main
   configuration file is read before any of the configuration directories,
   and has the lowest precedence; entries in a file in any configuration
   directory override entries in the single configuration file. Files in
   the *.conf.d/ configuration subdirectories are sorted by their filename
   in lexicographic order, regardless of which of the subdirectories they
   reside in. If multiple files specify the same option, the entry in the
   file with the lexicographically latest name takes precedence. It is
   recommended to prefix all filenames in those subdirectories with a
   two-digit number and a dash, to simplify the ordering of the files.

   To disable a configuration file supplied by the vendor, the recommended
   way is to place a symlink to /dev/null in the configuration directory
   in /etc/, with the same filename as the vendor configuration file.

OPTIONS

   All options are configured in the "[Coredump]" section:

   Storage=
       Controls where to store cores. One of "none", "external", and
       "journal". When "none", the core dumps will be logged (included the
       traceback if possible), but not stored permanently. When "external"
       (the default), cores will be stored in /var/lib/systemd/coredump/.
       When "journal", cores will be stored in the journal and rotated
       following normal journal rotation patterns.

       When cores are stored in the journal, they might be compressed
       following journal compression settings, see journald.conf(5). When
       cores are stored externally, they will be compressed by default,
       see below.

   Compress=
       Controls compression for external storage. Takes a boolean
       argument, which defaults to "yes".

   ProcessSizeMax=
       The maximum size in bytes of a core which will be processed. Core
       dumps exceeding this size will be logged, but the backtrace will
       not be generated and the core will not be stored.

   ExternalSizeMax=, JournalSizeMax=
       The maximum (uncompressed) size in bytes of a core to be saved.

   MaxUse=, KeepFree=
       Enforce limits on the disk space taken up by externally stored core
       dumps.  MaxUse= makes sure that old core dumps are removed as soon
       as the total disk space taken up by core dumps grows beyond this
       limit (defaults to 10% of the total disk size).  KeepFree= controls
       how much disk space to keep free at least (defaults to 15% of the
       total disk size). Note that the disk space used by core dumps might
       temporarily exceed these limits while core dumps are processed.
       Note that old core dumps are also removed based on time via
       systemd-tmpfiles(8). Set either value to 0 to turn off size-based
       clean-up.

SEE ALSO

   systemd-journald.service(8), coredumpctl(1), systemd-tmpfiles(8)



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