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<?xml version='1.0'?> <!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
Copyright 2014 Colin Walters <walters@verbum.org>
SPDX-License-Identifier: LGPL-2.0+
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library. If not, see <https://www.gnu.org/licenses/>.
-->
<refentry id="ostree.repo-config">
<refentryinfo>
<title>ostree.repo-config</title>
<productname>OSTree</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Colin</firstname>
<surname>Walters</surname>
<email>walters@verbum.org</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>ostree.repo-config</refentrytitle>
<manvolnum>5</manvolnum>
</refmeta>
<refnamediv>
<refname>ostree.repo-config</refname>
<refpurpose>OSTree repository configuration</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
The <filename>config</filename> file in an OSTree
repository is a "keyfile" in the <ulink
url="http://standards.freedesktop.org/desktop-entry-spec/latest/">XDG
Desktop Entry Specification</ulink> format. It has
several global flags, as well as zero or more remote
entries which describe how to access remote
repositories.
</para>
<para>
See <citerefentry><refentrytitle>ostree.repo</refentrytitle><manvolnum>5</manvolnum></citerefentry> for more information
about OSTree repositories.
</para>
</refsect1>
<refsect1>
<title>[core] Section Options</title>
<para>
Repository-global options. The following entries are defined:
</para>
<variablelist>
<varlistentry>
<term><varname>mode</varname></term>
<listitem><para>One of <literal>bare</literal>, <literal>bare-user</literal>, <literal>bare-user-only</literal>, or <literal>archive-z2</literal> (note that <literal>archive</literal> is used everywhere else.)</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>repo_version</varname></term>
<listitem><para>Currently, this must be set to <literal>1</literal>.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>auto-update-summary</varname></term>
<listitem><para>Boolean value controlling whether or not to
automatically update the summary file after any ref is added,
removed, or updated. Other modifications which may render a
summary file stale (like static deltas, or collection IDs) do
not currently trigger an auto-update.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>commit-update-summary</varname></term>
<listitem><para>This option is deprecated. Use
<literal>auto-update-summary</literal> instead, for which this
option is now an alias.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>fsync</varname></term>
<listitem><para>Boolean value controlling whether or not to
ensure files are on stable storage when performing operations
such as commits, pulls, and checkouts. Defaults to
<literal>true</literal>.</para>
<para>
If you disable fsync, OSTree will no longer be robust
against kernel crashes or power loss.
</para>
<para>
You might choose to disable this for local development
repositories, under the assumption they can be recreated from
source. Similarly, you could disable for a mirror where you could
re-pull.
</para>
<para>
For the system repository, you might choose to disable fsync
if you have uninterruptable power supplies and a well tested
kernel.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>per-object-fsync</varname></term>
<listitem><para>By default, OSTree will batch fsync() after
writing everything; however, this can cause latency spikes
for other processes which are also invoking fsync().
Turn on this boolean to reduce potential latency spikes,
at the cost of slowing down OSTree updates. You most
likely want this on by default for "background" OS updates.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>min-free-space-percent</varname></term>
<listitem>
<para>
Integer percentage value (0-99) that specifies a minimum percentage
of total space (in blocks) in the underlying filesystem to keep
free. The default value is 3, which is enforced when neither this
option nor <varname>min-free-space-size</varname> are set.
</para>
<para>
If <varname>min-free-space-size</varname> is set to a non-zero
value, <varname>min-free-space-percent</varname> is ignored. Note
that, <varname>min-free-space-percent</varname> is not enforced on
metadata objects. It is assumed that metadata objects are relatively
small in size compared to content objects and thus kept outside the
scope of this option.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>min-free-space-size</varname></term>
<listitem>
<para>
Value (in power-of-2 MB, GB or TB) that specifies a minimum space
in the underlying filesystem to keep free. Examples of acceptable
values: <literal>500MB</literal> (524 288 000 bytes),
<literal>1GB</literal> (1 073 741 824 bytes),
<literal>1TB</literal> (1 099 511 627 776 bytes).
</para>
<para>
If this option is set to a non-zero value, and
<varname>min-free-space-percent</varname> is also set, this option
takes priority. Note that, <varname>min-free-space-size</varname> is
not enforced on metadata objects. It is assumed that metadata objects
are relatively small in size compared to content objects and thus kept
outside the scope of this option.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>add-remotes-config-dir</varname></term>
<listitem>
<para>
Boolean value controlling whether new remotes will be added
in the remotes configuration directory. Defaults to
<literal>true</literal> for system ostree repositories. When
this is <literal>false</literal>, remotes will be added in
the repository's <filename>config</filename> file.
</para>
<para>
This only applies to repositories that use a remotes
configuration directory such as system ostree repositories,
which use <filename>/etc/ostree/remotes.d</filename>.
Non-system repositories do not use a remotes configuration
directory unless one is specified when the repository is
opened.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>payload-link-threshold</varname></term>
<listitem><para>An integer value that specifies a minimum file size for creating
a payload link. By default it is disabled.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>collection-id</varname></term>
<listitem><para>A reverse DNS domain name under your control, which enables peer
to peer distribution of refs in this repository. See the
<literal>--collection-id</literal> section in
<citerefentry><refentrytitle>ostree-init</refentrytitle><manvolnum>1</manvolnum></citerefentry>
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>locking</varname></term>
<listitem><para>Boolean value controlling whether or not OSTree does
repository locking internally. This uses file locks and is
hence for multiple process exclusion (e.g. Flatpak and OSTree
writing to the same repository separately). This is enabled by
default since 2018.5.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>lock-timeout-secs</varname></term>
<listitem><para>Integer value controlling the number of seconds to
block while attempting to acquire a lock (see above). A value
of -1 means block indefinitely. The default value is 30.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>default-repo-finders</varname></term>
<listitem><para>Semicolon separated default list of finders (sources
for refs) to use when pulling. This can be used to disable
pulling from mounted filesystems, peers on the local network,
or the Internet. However note that it only applies when a set
of finders isn't explicitly specified, either by a consumer of
libostree API or on the command line. Possible values:
<literal>config</literal>, <literal>lan</literal>, and
<literal>mount</literal> (or any combination thereof). If unset, this
defaults to <literal>config;mount;</literal> (since the LAN finder is
costly).
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>no-deltas-in-summary</varname></term>
<listitem><para>Boolean value controlling whether OSTree should skip
putting an index of available deltas in the summary file. Defaults to false.
</para>
<para>
Since 2020.7 OSTree can use delta indexes outside the summary file,
making the summary file smaller (especially for larger repositories). However
by default we still create the index in the summary file to make older clients
work. If you know all clients will be 2020.7 later you can enable this to
save network bandwidth.
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>[remote "name"] Section Options</title>
<para>
Describes a remote repository location.
</para>
<variablelist>
<varlistentry>
<term><varname>url</varname></term>
<listitem><para>Must be present; declares URL for accessing metadata and
content for remote. See also <literal>contenturl</literal>. The
supported schemes are documented below.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>contenturl</varname></term>
<listitem><para>Declares URL for accessing content (filez, static delta
parts). When specified, <literal>url</literal> is used just for
metadata: summary, static delta "superblocks".</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>branches</varname></term>
<listitem><para>A list of strings. Represents the default configured
branches to fetch from the remote when no specific branches are
requested during a pull operation.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>proxy</varname></term>
<listitem><para>A string value, if given should be a URL for a
HTTP proxy to use for access to this repository.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>gpg-verify</varname></term>
<listitem><para>A boolean value, defaults to true.
Controls whether or not OSTree will require commits to be
signed by a known GPG key. For more information, see the
<citerefentry><refentrytitle>ostree</refentrytitle><manvolnum>1</manvolnum></citerefentry>
manual under GPG.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>gpg-verify-summary</varname></term>
<listitem><para>A boolean value, defaults to false.
Controls whether or not OSTree will check if the summary
is signed by a known GPG key.
For more information, see the <citerefentry><refentrytitle>ostree</refentrytitle><manvolnum>1</manvolnum></citerefentry>
manual under GPG.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>tls-permissive</varname></term>
<listitem><para>A boolean value, defaults to false. By
default, server TLS certificates will be checked against the
system certificate store. If this variable is set, any
certificate will be accepted.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>tls-client-cert-path</varname></term>
<listitem><para>Path to file for client-side certificate, to present when making requests to this repository.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>tls-client-key-path</varname></term>
<listitem><para>Path to file containing client-side certificate key, to present when making requests to this repository.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>tls-ca-path</varname></term>
<listitem><para>Path to file containing trusted anchors instead of the system CA database.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>http2</varname></term>
<listitem><para>A boolean value, defaults to true. By
default, libostree will use HTTP2; setting this to <literal>false</literal>
will disable it. May be useful to work around broken servers.
</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>unconfigured-state</varname></term>
<listitem><para>If set, pulls from this remote will fail with the configured text. This is intended for OS vendors which have a subscription process to access content.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>custom-backend</varname></term>
<listitem><para>If set, pulls from this remote via libostree will fail with an error that mentions the value.
It is recommended to make this a software identifier token (e.g. "examplecorp-fetcher"), not freeform text ("ExampleCorp Fetcher").
This is intended to be used by higher level software that wants to fetch ostree commits via some other mechanism, while still reusing the core libostree infrastructure around e.g. signatures.
</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>[sysroot] Section Options</title>
<para>
Options for the sysroot, which contains the OSTree repository,
deployments, and stateroots. The following entries are defined:
</para>
<variablelist>
<varlistentry>
<term><varname>bootloader</varname></term>
<listitem><para>Configure the bootloader that OSTree uses when
deploying the sysroot. This may take the values
<literal>bootloader=none</literal>, <literal>bootloader=auto</literal>,
<literal>bootloader=grub2</literal>, <literal>bootloader=syslinux</literal>,
<literal>bootloader=uboot</literal> or <literal>bootloader=zipl</literal>.
Default is <literal>auto</literal>.
</para>
<para>
If <literal>none</literal>, then OSTree will generate only BLS (Boot
Loader Specification) fragments in <literal>sysroot/boot/loader/entries/</literal>
for the deployment.
</para>
<para>
If <literal>auto</literal>, then in addition to generating BLS
fragments, OSTree will dynamically check for the existence of grub2,
uboot, and syslinux bootloaders. If one of the bootloaders is found,
then OSTree will generate a config for the bootloader found. For
example, <literal>grub2-mkconfig</literal> is run for the grub2 case.
</para>
<para>
A specific bootloader type may also be explicitly requested by choosing
<literal>grub2</literal>, <literal>syslinux</literal>, <literal>uboot</literal> or
<literal>zipl</literal>.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>/etc/ostree/remotes.d</title>
<para>
In addition to the <filename>/ostree/repo/config</filename>
file, remotes may also be specified in
<filename>/etc/ostree/remotes.d</filename>. The remote
configuration file must end in <literal>.conf</literal>; files
whose name does not end in <literal>.conf</literal> will be
ignored.
</para>
</refsect1>
<refsect1>
<title>Repository url/contenturl</title>
<para>
Originally, OSTree had just a <literal>url</literal> option
for remotes. Since then, the <literal>contenturl</literal>
option was introduced. Both of these support
<literal>file</literal>, <literal>http</literal>, and
<literal>https</literal> schemes.
</para>
<para>
Additionally, both of these can be prefixed with the string
<literal>mirrorlist=</literal>, which instructs the client
that the target url is a "mirrorlist" format, which is
a plain text file of newline-separated URLs. Earlier
URLs will be given precedence.
</para>
<para>
Note that currently, the <literal>tls-ca-path</literal> and
<literal>tls-client-cert-path</literal> options apply to every HTTP
request, even when <literal>contenturl</literal> and/or
<literal>mirrorlist</literal> are in use. This may change in the future to
only apply to metadata (i.e. <literal>url</literal>, not
<literal>contenturl</literal>) fetches.
</para>
</refsect1>
<refsect1>
<title>Per-remote GPG keyrings and verification</title>
<para>
OSTree supports a per-remote GPG keyring, as well as a
<literal>gpgkeypath</literal> option. For more information see
<citerefentry><refentrytitle>ostree</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
in the section <literal>GPG verification</literal>.
</para>
</refsect1>
<refsect1>
<title>Per-remote HTTP cookies</title>
<para>
Some content providers may want to control access to remote
repositories via HTTP cookies. The <command>ostree remote
add-cookie</command> and <command>ostree remote
delete-cookie</command> commands will update a per-remote
lookaside cookie jar, named
<filename>$remotename.cookies.txt</filename>.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>ostree</refentrytitle><manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>ostree.repo</refentrytitle><manvolnum>5</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
|