diff options
Diffstat (limited to 'doc/guix.texi')
| -rw-r--r-- | doc/guix.texi | 181 |
1 files changed, 173 insertions, 8 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index 9beef61c94..e501fcfc52 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -36,7 +36,7 @@ Copyright @copyright{} 2016, 2017, 2018, 2019, 2020, 2021 Efraim Flashner@* Copyright @copyright{} 2016 John Darrington@* Copyright @copyright{} 2016, 2017 Nikita Gillmann@* Copyright @copyright{} 2016, 2017, 2018, 2019, 2020 Jan Nieuwenhuizen@* -Copyright @copyright{} 2016, 2017, 2018, 2019, 2020 Julien Lepiller@* +Copyright @copyright{} 2016, 2017, 2018, 2019, 2020, 2021 Julien Lepiller@* Copyright @copyright{} 2016 Alex ter Weele@* Copyright @copyright{} 2016, 2017, 2018, 2019, 2020, 2021 Christopher Baines@* Copyright @copyright{} 2017, 2018, 2019 Clément Lassieur@* @@ -68,7 +68,7 @@ Copyright @copyright{} 2019 Ivan Petkov@* Copyright @copyright{} 2019 Jakob L. Kreuze@* Copyright @copyright{} 2019 Kyle Andrews@* Copyright @copyright{} 2019 Alex Griffin@* -Copyright @copyright{} 2019, 2020 Guillaume Le Vaillant@* +Copyright @copyright{} 2019, 2020, 2021 Guillaume Le Vaillant@* Copyright @copyright{} 2020 Leo Prikler@* Copyright @copyright{} 2019, 2020 Simon Tournier@* Copyright @copyright{} 2020 Wiktor Żelazny@* @@ -88,6 +88,7 @@ Copyright @copyright{} 2020 John Soo@* Copyright @copyright{} 2020 Jonathan Brielmaier@* Copyright @copyright{} 2020 Edgar Vincent@* Copyright @copyright{} 2021 Maxime Devos@* +Copyright @copyright{} 2021 B. Wilson@* Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or @@ -146,7 +147,7 @@ Spanish (@pxref{Top,,, guix.es, Manual de referencia de GNU Guix}), and Russian (@pxref{Top,,, guix.ru, Руководство GNU Guix}). If you would like to translate it in your native language, consider joining @uref{https://translate.fedoraproject.org/projects/guix/documentation-manual, -Weblate}. +Weblate} (@pxref{Translating Guix}). @menu * Introduction:: What is Guix about? @@ -19894,6 +19895,9 @@ Socket file to use for local (non-network) connections. @item @code{extra-content} (default: @code{""}) Additional settings for the @file{my.cnf} configuration file. +@item @code{extra-environment} (default: @code{#~'()}) +List of environment variables passed to the @command{mysqld} process. + @item @code{auto-upgrade?} (default: @code{#t}) Whether to automatically run @command{mysql_upgrade} after starting the service. This is necessary to upgrade the @dfn{system schema} after @@ -20042,6 +20046,38 @@ This is used by imap (for shared users) and lda. It defaults to @samp{"/var/run/dovecot/auth-userdb"}. @end deftypevr +@deftypevr {@code{protocol-configuration} parameter} boolean imap-metadata? +Whether to enable the @code{IMAP METADATA} extension as defined in +@uref{https://tools.ietf.org/html/rfc5464,RFC@tie{}5464}, which provides +a means for clients to set and retrieve per-mailbox, per-user metadata +and annotations over IMAP. + +If this is @samp{#t}, you must also specify a dictionary @i{via} the +@code{mail-attribute-dict} setting. + +Defaults to @samp{#f}. + +@end deftypevr + +@deftypevr {@code{protocol-configuration} parameter} space-separated-string-list managesieve-notify-capabilities +Which NOTIFY capabilities to report to clients that first connect to +the ManageSieve service, before authentication. These may differ from the +capabilities offered to authenticated users. If this field is left empty, +report what the Sieve interpreter supports by default. + +Defaults to @samp{()}. +@end deftypevr + +@deftypevr {@code{protocol-configuration} parameter} space-separated-string-list managesieve-sieve-capability +Which SIEVE capabilities to report to clients that first connect to +the ManageSieve service, before authentication. These may differ from the +capabilities offered to authenticated users. If this field is left empty, +report what the Sieve interpreter supports by default. + +Defaults to @samp{()}. + +@end deftypevr + @deftypevr {@code{protocol-configuration} parameter} space-separated-string-list mail-plugins Space separated list of plugins to load. @end deftypevr @@ -20740,6 +20776,17 @@ could allow a user to delete others' mailboxes, or @code{ln -s @samp{""}. @end deftypevr +@deftypevr {@code{dovecot-configuration} parameter} string mail-attribute-dict +The location of a dictionary used to store @code{IMAP METADATA} +as defined by @uref{https://tools.ietf.org/html/rfc5464, RFC@tie{}5464}. + +The IMAP METADATA commands are available only if the ``imap'' +protocol configuration's @code{imap-metadata?} field is @samp{#t}. + +Defaults to @samp{""}. + +@end deftypevr + @deftypevr {@code{dovecot-configuration} parameter} boolean mail-full-filesystem-access? Allow full file system access to clients. There's no access checks other than what the operating system does for the active UID/GID@. It @@ -26975,6 +27022,12 @@ The peer public-key represented as a base64 string. A list of IP addresses from which incoming traffic for this peer is allowed and to which incoming traffic for this peer is directed. +@item @code{keep-alive} (default: @code{#f}) +An optional time interval in seconds. A packet will be sent to the +server endpoint once per time interval. This helps receiving +incoming connections from this peer when you are behind a NAT or +a firewall. + @end table @end deftp @@ -28997,10 +29050,11 @@ By default, it produces @lisp '("--device" "rtl8139,netdev=net0" - "--netdev" "user,id=net0\ - ,hostfwd=tcp:127.0.0.1:@var{secrets-port}-:1004\ - ,hostfwd=tcp:127.0.0.1:@var{ssh-port}-:2222\ - ,hostfwd=tcp:127.0.0.1:@var{vnc-port}-:5900") + "--netdev" (string-append + "user,id=net0," + "hostfwd=tcp:127.0.0.1:@var{secrets-port}-:1004," + "hostfwd=tcp:127.0.0.1:@var{ssh-port}-:2222," + "hostfwd=tcp:127.0.0.1:@var{vnc-port}-:5900")) @end lisp with forwarded ports: @@ -31125,6 +31179,15 @@ will use the current system it's running on as the default. @item @code{max-parallel-builds} (default: @code{1}) The number of builds to perform in parallel. +@item @code{max-1min-load-average} (default: @code{#f}) +Load average value to look at when considering starting new builds, if +the 1 minute load average exceeds this value, the agent will wait before +starting new builds. + +This will be unspecified if the value is @code{#f}, and the agent will +use the number of cores reported by the system as the max 1 minute load +average. + @item @code{derivation-substitute-urls} (default: @code{#f}) URLs from which to attempt to fetch substitutes for derivations, if the derivations aren't already available. @@ -31228,7 +31291,7 @@ The Guix Build Coordinator package to use. @item @code{user} (default: @code{"guix-build-coordinator-queue-builds"}) The system user to run the service as. -@item @code{coordinator} (default: @code{"http://localhost:8745"}) +@item @code{coordinator} (default: @code{"http://localhost:8746"}) The URI to use when connecting to the coordinator. @item @code{systems} (default: @code{#f}) @@ -31403,6 +31466,86 @@ parameters, can be done as follow: @end lisp @end deffn +@cindex rasdaemon +@cindex Platform Reliability, Availability and Serviceability daemon +@subsubheading Rasdaemon Service + +The Rasdaemon service provides a daemon which monitors platform +@acronym{RAS, Reliability@comma{} Availability@comma{} and Serviceability} reports from +Linux kernel trace events, logging them to syslogd. + +Reliability, Availability and Serviceability is a concept used on servers meant +to measure their robustness. + +@strong{Relability} is the probability that a system will produce correct +outputs: + +@itemize @bullet +@item Generally measured as Mean Time Between Failures (MTBF), and +@item Enhanced by features that help to avoid, detect and repair hardware +faults +@end itemize + +@strong{Availability} is the probability that a system is operational at a +given time: + +@itemize @bullet +@item Generally measured as a percentage of downtime per a period of time, and +@item Often uses mechanisms to detect and correct hardware faults in runtime. +@end itemize + +@strong{Serviceability} is the simplicity and speed with which a system can be +repaired or maintained: + +@itemize @bullet +@item Generally measured on Mean Time Between Repair (MTBR). +@end itemize + + +Among the monitoring measures, the most usual ones include: + +@itemize @bullet +@item CPU – detect errors at instruction execution and at L1/L2/L3 caches; +@item Memory – add error correction logic (ECC) to detect and correct errors; +@item I/O – add CRC checksums for transferred data; +@item Storage – RAID, journal file systems, checksums, Self-Monitoring, +Analysis and Reporting Technology (SMART). +@end itemize + +By monitoring the number of occurrences of error detections, it is possible to +identify if the probability of hardware errors is increasing, and, on such +case, do a preventive maintenance to replace a degraded component while those +errors are correctable. + +For detailed information about the types of error events gathered and how to +make sense of them, see the kernel administrator's guide at +@url{https://www.kernel.org/doc/html/latest/admin-guide/ras.html}. + +@defvr {Scheme Variable} rasdaemon-service-type +Service type for the @command{rasdaemon} service. It accepts a +@code{rasdaemon-configuration} object. Instantiating like + +@lisp +(service rasdaemon-service-type) +@end lisp + +will load with a default configuration, which monitors all events and logs to +syslogd. +@end defvr + +@deftp {Data Type} rasdaemon-configuration +The data type representing the configuration of @command{rasdaemon}. + +@table @asis +@item @code{record?} (default: @code{#f}) + +A boolean indicating whether to record the events in an SQLite database. This +provides a more structured access to the information contained in the log file. +The database location is hard-coded to @file{/var/lib/rasdaemon/ras-mc_event.db}. + +@end table +@end deftp + @cindex zram @cindex compressed swap @cindex Compressed RAM-based block devices @@ -34113,6 +34256,28 @@ configuration when you use @command{guix system reconfigure}, @command{guix system init}, or @command{guix deploy}. @end defvr +@defvr {Scheme Variable} linux-loadable-module-service-type +Type of the service that collects lists of packages containing +kernel-loadable modules, and adds them to the set of kernel-loadable +modules. + +This service type is intended to be extended by other service types, +such as below: + +@lisp +(define module-installing-service-type + (service-type + (name 'module-installing-service) + (extensions (list (service-extension linux-loadable-module-service-type + (const (list module-to-install-1 + module-to-install-2))))) + (default-value #f))) +@end lisp + +This does not actually load modules at bootup, only adds it to the +kernel profile so that it @emph{can} be loaded by other means. +@end defvr + @node Shepherd Services @subsection Shepherd Services |