1fc248afcc
When installing a fresh NixOS system it occasionally happens that you encounter issues that are rather hard to track down since `nixos-install(8)` doesn't provide any debugging flags. This patch adds `-L` to force `nix build` to display the build-log on stderr and `-v` to increase the log-level of Nix.
304 lines
8.5 KiB
XML
304 lines
8.5 KiB
XML
<refentry xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude">
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<refmeta>
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<refentrytitle><command>nixos-install</command>
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</refentrytitle><manvolnum>8</manvolnum>
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<refmiscinfo class="source">NixOS</refmiscinfo>
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<!-- <refmiscinfo class="version"><xi:include href="version.txt" parse="text"/></refmiscinfo> -->
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</refmeta>
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<refnamediv>
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<refname><command>nixos-install</command></refname>
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<refpurpose>install bootloader and NixOS</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>nixos-install</command>
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<arg>
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<group choice='req'>
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<arg choice='plain'>
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<option>--verbose</option>
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</arg>
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<arg choice='plain'>
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<option>-v</option>
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</arg>
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</group>
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</arg>
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<arg>
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<group choice='req'>
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<arg choice='plain'>
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<option>--print-build-logs</option>
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</arg>
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<arg choice='plain'>
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<option>-L</option>
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</arg>
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</group>
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</arg>
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<arg>
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<arg choice='plain'>
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<option>-I</option>
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</arg>
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<replaceable>path</replaceable>
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</arg>
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<arg>
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<arg choice='plain'>
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<option>--root</option>
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</arg>
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<replaceable>root</replaceable>
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</arg>
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<arg>
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<arg choice='plain'>
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<option>--system</option>
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</arg>
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<replaceable>path</replaceable>
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</arg>
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<arg>
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<arg choice='plain'>
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<option>--no-channel-copy</option>
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</arg>
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</arg>
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<arg>
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<arg choice='plain'>
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<option>--no-root-passwd</option>
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</arg>
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</arg>
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<arg>
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<arg choice='plain'>
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<option>--no-bootloader</option>
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</arg>
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</arg>
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<arg>
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<group choice='req'>
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<arg choice='plain'>
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<option>--max-jobs</option>
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</arg>
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<arg choice='plain'>
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<option>-j</option>
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</arg>
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</group> <replaceable>number</replaceable>
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</arg>
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<arg>
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<option>--cores</option> <replaceable>number</replaceable>
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</arg>
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<arg>
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<option>--option</option> <replaceable>name</replaceable> <replaceable>value</replaceable>
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</arg>
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<arg>
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<arg choice='plain'>
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<option>--show-trace</option>
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</arg>
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</arg>
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<arg>
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<arg choice='plain'>
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<option>--help</option>
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</arg>
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</arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsection>
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<title>Description</title>
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<para>
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This command installs NixOS in the file system mounted on
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<filename>/mnt</filename>, based on the NixOS configuration specified in
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<filename>/mnt/etc/nixos/configuration.nix</filename>. It performs the
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following steps:
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<itemizedlist>
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<listitem>
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<para>
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It copies Nix and its dependencies to
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<filename>/mnt/nix/store</filename>.
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</para>
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</listitem>
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<listitem>
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<para>
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It runs Nix in <filename>/mnt</filename> to build the NixOS configuration
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specified in <filename>/mnt/etc/nixos/configuration.nix</filename>.
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</para>
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</listitem>
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<listitem>
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<para>
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It installs the GRUB boot loader on the device specified in the option
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<option>boot.loader.grub.device</option> (unless
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<option>--no-bootloader</option> is specified), and generates a GRUB
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configuration file that boots into the NixOS configuration just
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installed.
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</para>
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</listitem>
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<listitem>
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<para>
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It prompts you for a password for the root account (unless
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<option>--no-root-passwd</option> is specified).
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</para>
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</listitem>
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</itemizedlist>
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</para>
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<para>
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This command is idempotent: if it is interrupted or fails due to a temporary
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problem (e.g. a network issue), you can safely re-run it.
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</para>
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</refsection>
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<refsection>
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<title>Options</title>
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<para>
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This command accepts the following options:
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</para>
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<variablelist>
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<varlistentry>
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<term><option>--verbose</option> / <option>-v</option></term>
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<listitem>
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<para>Increases the level of verbosity of diagnostic messages
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printed on standard error. For each Nix operation, the information
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printed on standard output is well-defined; any diagnostic
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information is printed on standard error, never on standard
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output.</para>
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<para>Please note that this option may be specified repeatedly.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--print-build-logs</option> / <option>-L</option></term>
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<listitem>
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<para>Print the full build logs of <command>nix build</command> to stderr.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>--root</option>
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</term>
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<listitem>
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<para>
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Defaults to <filename>/mnt</filename>. If this option is given, treat the
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directory <replaceable>root</replaceable> as the root of the NixOS
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installation.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>--system</option>
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</term>
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<listitem>
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<para>
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If this option is provided, <command>nixos-install</command> will install
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the specified closure rather than attempt to build one from
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<filename>/mnt/etc/nixos/configuration.nix</filename>.
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</para>
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<para>
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The closure must be an appropriately configured NixOS system, with boot
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loader and partition configuration that fits the target host. Such a
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closure is typically obtained with a command such as <command>nix-build
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-I nixos-config=./configuration.nix '<nixos>' -A system
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--no-out-link</command>
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>-I</option>
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</term>
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<listitem>
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<para>
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Add a path to the Nix expression search path. This option may be given
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multiple times. See the NIX_PATH environment variable for information on
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the semantics of the Nix search path. Paths added through
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<replaceable>-I</replaceable> take precedence over NIX_PATH.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>--max-jobs</option>
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</term>
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<term>
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<option>-j</option>
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</term>
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<listitem>
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<para>
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Sets the maximum number of build jobs that Nix will perform in parallel
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to the specified number. The default is <literal>1</literal>. A higher
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value is useful on SMP systems or to exploit I/O latency.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>--cores</option>
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</term>
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<listitem>
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<para>
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Sets the value of the <envar>NIX_BUILD_CORES</envar> environment variable
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in the invocation of builders. Builders can use this variable at their
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discretion to control the maximum amount of parallelism. For instance, in
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Nixpkgs, if the derivation attribute
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<varname>enableParallelBuilding</varname> is set to
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<literal>true</literal>, the builder passes the
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<option>-j<replaceable>N</replaceable></option> flag to GNU Make. The
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value <literal>0</literal> means that the builder should use all
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available CPU cores in the system.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>--option</option> <replaceable>name</replaceable> <replaceable>value</replaceable>
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</term>
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<listitem>
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<para>
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Set the Nix configuration option <replaceable>name</replaceable> to
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<replaceable>value</replaceable>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>--show-trace</option>
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</term>
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<listitem>
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<para>
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Causes Nix to print out a stack trace in case of Nix expression
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evaluation errors.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>
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<option>--help</option>
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</term>
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<listitem>
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<para>
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Synonym for <command>man nixos-install</command>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsection>
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<refsection>
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<title>Examples</title>
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<para>
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A typical NixOS installation is done by creating and mounting a file system
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on <filename>/mnt</filename>, generating a NixOS configuration in
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<filename>/mnt/etc/nixos/configuration.nix</filename>, and running
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<command>nixos-install</command>. For instance, if we want to install NixOS
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on an <literal>ext4</literal> file system created in
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<filename>/dev/sda1</filename>:
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<screen>
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<prompt>$ </prompt>mkfs.ext4 /dev/sda1
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<prompt>$ </prompt>mount /dev/sda1 /mnt
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<prompt>$ </prompt>nixos-generate-config --root /mnt
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<prompt>$ </prompt># edit /mnt/etc/nixos/configuration.nix
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<prompt>$ </prompt>nixos-install
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<prompt>$ </prompt>reboot
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</screen>
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</para>
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</refsection>
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</refentry>
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