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Diffstat (limited to 'doc/guix.texi')
| -rw-r--r-- | doc/guix.texi | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index 8483dbb4af..648db47a8a 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -2219,9 +2219,19 @@ incomplete, outdated, or open to discussions. Please discuss it on The GNU system supports a consistent whole-system configuration mechanism. By that we mean that all aspects of the global system configuration---such as the available system services, timezone and -locale settings, user accounts---are configured in a single place. Such +locale settings, user accounts---are declared in a single place. Such a @dfn{system configuration} can be @dfn{instantiated}---i.e., effected. +One of the advantages of putting all the system configuration under the +control of Guix is that it supports transactional system upgrades, and +makes it possible to roll-back to a previous system instantiation, +should something go wrong with the new one (@pxref{Features}). Another +one is that it makes it easy to replicate the exact same configuration +across different machines, or at different points in time, without +having to resort to additional administration tools layered on top of +the system's own tools. +@c Yes, we're talking of Puppet, Chef, & co. here. ↑ + This section describes this mechanism. First we focus on the system administrator's viewpoint---explaining how the system is configured and instantiated. Then we show how this mechanism can be extended, for @@ -2253,7 +2263,7 @@ Linux-Libre kernel, initial RAM disk, and boot loader looks like this: (gnu packages guile) ; Guile (gnu packages linux)) ; procps, psmisc -(define %komputilo +(define komputilo (operating-system (host-name "komputilo") (timezone "Europe/Paris") @@ -2275,10 +2285,11 @@ Linux-Libre kernel, initial RAM disk, and boot loader looks like this: @end lisp This example should be self-describing. The @code{packages} field lists -packages provides by the various @code{(gnu packages ...)} modules above; -these are the packages that will be globally visible on the system, for -all user accounts, in addition to the per-user profiles (@pxref{Invoking -guix package}). +packages provided by the various @code{(gnu packages ...)} modules above +(@pxref{Package Modules}). These are the packages that will be globally +visible on the system, for all user accounts---i.e., in every user's +@code{PATH} environment variable---in addition to the per-user profiles +(@pxref{Invoking guix package}). The @code{services} field lists @dfn{system services} to be made available when the system starts. The @var{%standard-services} list, @@ -2315,14 +2326,6 @@ the packages, configuration files, and other supporting files needed to instantiate @var{os}. @end deffn -One of the advantages of putting all the system configuration under the -control of Guix is that it makes it possible to roll-back to a previous -system instantiation, should anything go wrong with the new one. -Another one is that it makes it easy to replicate the very same -configuration across different machines, or at different points in time, -without having to resort to additional administration tools layered on -top of the system's own tools. -@c Yes, we're talking of Puppet, Chef, & co. here. ↑ @node Defining Services @subsection Defining Services |