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Rename "osname" → "stateroot"

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I never really liked the term "osname". I feel "stateroot" is a *lot* clearer,
since the osname/stateroot mostly just holds `/var`. Further it avoids the `os`
prefix which is already overloaded.

Some of the existing docs already talked about "operating system state", which
further reinforces this.

There's *lot* more things than this which reference the term "osname", but I
don't want to change *everything* yet in this patch in case we decide to do
something different - this just gets the highlights.

Closes: #794
Approved by: jlebon
This commit is contained in:
Colin Walters 2017-04-14 10:34:38 -04:00 committed by Atomic Bot
parent 0c4aeff1cb
commit 55603a0c52
10 changed files with 37 additions and 25 deletions
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2
docs/manual/atomic-upgrades.md
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@ -55,7 +55,7 @@ checking it back out of the repo into a deployment.
## Assembling a new deployment directory
Given a commit to deploy, OSTree first allocates a directory for
it. This is of the form `/boot/loader/entries/ostree-$osname-$checksum.$serial.conf`.
it. This is of the form `/boot/loader/entries/ostree-$stateroot-$checksum.$serial.conf`.
The `$serial` is normally `0`, but if a
given commit is deployed more than once, it will be incremented.
This is supported because the previous deployment may have

25
docs/manual/deployment.md
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@ -8,23 +8,24 @@ operating systems (accessible via `ostree admin`). The core content of these op
are treated as read-only, but they transparently share storage.
A deployment is physically located at a path of the form
`/ostree/deploy/$osname/deploy/$checksum`.
`/ostree/deploy/$stateroot/deploy/$checksum`.
OSTree is designed to boot directly into exactly one deployment
at a time; each deployment is intended to be a target for
`chroot()` or equivalent.
### "osname": Group of deployments that share /var
### "stateroot" (AKA "osname"): Group of deployments that share /var
Each deployment is grouped in exactly one "osname". From above, you
can see that an osname is physically represented in the
`/ostree/deploy/$osname` directory. For example, OSTree can allow
parallel installing Debian in `/ostree/deploy/debian` and Red Hat
Enterprise Linux in `/ostree/deploy/rhel` (subject to operating system
support, present released versions of these operating systems may not
support this).
Each deployment is grouped in exactly one "stateroot" (also known as an "osname");
the former term is preferred.
Each osname has exactly one copy of the traditional Unix `/var`,
stored physically in `/ostree/deploy/$osname/var`. OSTree provides
From above, you can see that an stateroot is physically represented in the
`/ostree/deploy/$stateroot` directory. For example, OSTree can allow parallel
installing Debian in `/ostree/deploy/debian` and Red Hat Enterprise Linux in
`/ostree/deploy/rhel` (subject to operating system support, present released
versions of these operating systems may not support this).
Each stateroot has exactly one copy of the traditional Unix `/var`,
stored physically in `/ostree/deploy/$stateroot/var`. OSTree provides
support tools for `systemd` to create a Linux bind mount that ensures
the booted deployment sees the shared copy of `/var`.
@ -81,7 +82,7 @@ files.
When a tree is deployed, it will have a configuration file generated
of the form
`/boot/loader/entries/ostree-$osname-$checksum.$serial.conf`. This
`/boot/loader/entries/ostree-$stateroot-$checksum.$serial.conf`. This
configuration file will include a special `ostree=` kernel argument
that allows the initramfs to find (and `chroot()` into) the specified
deployment.

2
docs/manual/introduction.md
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@ -97,7 +97,7 @@ parallel install inside an existing OS or distribution
occupying the physical `/` root.
On each client machine, there is an OSTree repository stored
in `/ostree/repo`, and a set of "deployments" stored in `/ostree/deploy/$OSNAME/$CHECKSUM`.
in `/ostree/repo`, and a set of "deployments" stored in `/ostree/deploy/$STATEROOT/$CHECKSUM`.
Each deployment is primarily composed of a set of hardlinks
into the repository. This means each version is deduplicated;
an upgrade process only costs disk space proportional to the

4
man/ostree-admin-config-diff.xml
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@ -66,10 +66,10 @@ Boston, MA 02111-1307, USA.
<variablelist>
<varlistentry>
<term><option>--os</option>="OSNAME"</term>
<term><option>--os</option>="STATEROOT"</term>
<listitem><para>
Use a different operating system root than the current one.
Use a different operating system stateroot than the current one.
</para></listitem>
</varlistentry>
</variablelist>

2
man/ostree-admin-deploy.xml
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@ -66,7 +66,7 @@ Boston, MA 02111-1307, USA.
<variablelist>
<varlistentry>
<term><option>--os</option>="OSNAME"</term>
<term><option>--os</option>="STATEROOT"</term>
<listitem><para>
Use a different operating system root than the current one.

12
man/ostree-admin-os-init.xml
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@ -49,7 +49,7 @@ Boston, MA 02111-1307, USA.
<refsynopsisdiv>
<cmdsynopsis>
<command>ostree admin os-init</command> <arg choice="req">OSNAME</arg>
<command>ostree admin os-init</command> <arg choice="req">STATEROOT</arg>
</cmdsynopsis>
</refsynopsisdiv>
@ -57,15 +57,19 @@ Boston, MA 02111-1307, USA.
<title>Description</title>
<para>
Initializes an new state for an operating system. Ensures that the core subdirectories of /var (/tmp, /lib, /run, and /lock) exist and initialize the given OSNAME as OSTree root. Each deployment location is comprised of a single shared <filename>var</filename> and a set of deployments (chroots).
Initializes an new stateroot (AKA "osname") for an operating system.
Ensures that the core subdirectories of /var (/tmp, /lib, /run, and
/lock) exist and initialize the given STATEROOT as OSTree stateroot.
Each deployment location is comprised of a single shared
<filename>var</filename> and a set of deployments (chroots).
</para>
</refsect1>
<refsect1>
<title>Example</title>
<para><command>$ ostree admin os-init gnome-ostree</command></para>
<para><command>$ ostree admin os-init exampleos</command></para>
<programlisting>
ostree/deploy/gnome-ostree initialized as OSTree root
ostree/deploy/exampleos initialized as OSTree root
</programlisting>
</refsect1>
</refentry>

2
man/ostree-admin-switch.xml
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@ -66,7 +66,7 @@ Boston, MA 02111-1307, USA.
<variablelist>
<varlistentry>
<term><option>--os</option>="OSNAME"</term>
<term><option>--os</option>="STATEROOT"</term>
<listitem><para>
Use a different operating system root than the current one.

2
man/ostree-admin-upgrade.xml
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@ -69,7 +69,7 @@ Boston, MA 02111-1307, USA.
<variablelist>
<varlistentry>
<term><option>--os</option>="OSNAME"</term>
<term><option>--os</option>="STATEROOT"</term>
<listitem><para>
Use a different operating system root than the current one.

5
man/ostree.xml
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@ -65,8 +65,9 @@ Boston, MA 02111-1307, USA.
Instead, they parallel install to the new toplevel
<filename>/ostree</filename> directory. Each
installed system gets its own
<filename>/ostree/deploy/<replaceable>osname</replaceable></filename>
directory.
<filename>/ostree/deploy/<replaceable>stateroot</replaceable></filename>
directory. (<literal>stateroot</literal> is the
newer term for <literal>osname</literal>).
</para>
<para>
Unlike <literal>rpm</literal> or

6
src/libostree/ostree-deployment.c
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@ -39,6 +39,12 @@ ostree_deployment_get_bootcsum (OstreeDeployment *self)
return self->bootcsum;
}
/*
* ostree_deployment_get_osname:
* @self: Deployemnt
*
* Returns: The "stateroot" name, also known as an "osname"
*/
const char *
ostree_deployment_get_osname (OstreeDeployment *self)
{