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{{#layout:doc}}{{#widget:AddThis}}[[Metro]] | <languages/> | ||
{{#layout:doc}}{{#widget:AddThis}}[[Metro]] is the build system for Funtoo Linux and [[Gentoo Linux]] stages. It automates the bootstrapping process. | |||
This tutorial will take you through installing, setting up and running [[Metro]]. | |||
Other [[:Category:Metro|Metro Documentation]] is available. | |||
= Preface = | = Preface = | ||
== | == How Metro Works == | ||
Metro | Metro is the Funtoo Linux automated build system, and is used to build Funtoo Linux stage tarballs. | ||
[[Metro]] | [[Metro]] cannot create a stage tarball out of thin air. To build a new stage tarball, [[Metro]] must use an existing, older stage tarball called a "seed" stage. This seed stage typically is used as the ''build environment'' for creating the stage we want. | ||
[[Metro]] can use two kinds of seed stages. Traditionally, [[Metro]] has used a stage3 as a seed stage. This stage3 is then used to build a new stage1, which in turn is used to build a new stage2, and then a new stage3. This is generally the most reliable way to build [[Gentoo Linux]] or Funtoo Linux, so it's the recommended approach. | |||
{{fancyimportant|''' | {{fancyimportant|'''After switching metro builds to Funtoo profile, Gentoo stages are no longer provided'''!}} | ||
== Seeds | == Seeds and Build Isolation == | ||
Another important concept to mention here is something called ''build isolation''. Because [[Metro]] creates an isolated build environment, and the build environment is explicitly defined using existing, tangible entities -- a seed stage and a portage snapshot -- you will get consistent, repeatable results. In other words, the same seed stage, portage snapshot and build instructions will generate an essentially identical result, even if you perform the build a month later on someone else's workstation. | |||
== Build | == Local Build == | ||
Say you wanted to build a new <tt>pentium4</tt> stage3 tarball. The recommended method of doing this would be to grab an existing <tt>pentium4</tt> stage3 tarball to use as your seed stage. [[Metro]] will be told to use this existing <tt>pentium4</tt> stage3 to build a new stage1 for the same <tt>pentium4</tt>. For this process, the generic <tt>pentium4</tt> stage3 would provide the ''build environment'' for creating our new stage1. Then, the new stage1 would serve as the build environment for creating the new <tt>pentium4</tt> stage2. And the new <tt>pentium4</tt> stage2 would serve as the build environment for creating the new <tt>pentium4</tt> stage3. | |||
In the [[Metro]] terminology this is called a '''local build''', which means a stage3 of a given architecture is used to seed a brand new build of the same architecture. Incidentally this will be the first exercise we are going to perform in this tutorial. | |||
A week later, you may want to build a brand new <tt>pentium4</tt> stage3 tarball. Rather than starting from the original <tt>pentium4</tt> stage3 again, you'd probably configure [[Metro]] to use the most-recently-built <tt>pentium4</tt> stage3 as the seed. [[Metro]] has built-in functionality to make this easy, allowing it to easily find and track the most recent stage3 seed available. | |||
== Build | == Remote Build == | ||
[[Metro]] | [[Metro]] can also perform '''remote build''', where a stage3 of a different, but binary compatible, architecture is used as a seed to build a different architecture stage3. Consequentiality the second exercise we are going to perform in this tutorial will be to build a <tt>core2 32bit</tt> stage3 tarball from the <tt>pentium4</tt> stage3 tarball we have just built. | ||
TODO: | TODO: add caveats about what archs can be seeded and what can be not (maybe a table?) | ||
== Build | == Tailored Build == | ||
Last, it's also worthy noting that both in <tt>local</tt> and <tt>remote builds</tt>, [[Metro]] can be configured to add and/or remove individual packages to the final tarball. | |||
Let's say you can't live without <tt>app-misc/screen</tt>, at the end of this tutorial, we will show how to have your tailored stage3 to include it. | |||
== | == Installing Metro == | ||
''' | '''The recommended and supported method''' is to use the Git repository of [[Metro]]. | ||
Ensure that {{Package|dev-vcs/git}} and {{Package|dev-python/boto}} (optional; required for EC2 support) are installed on your system: | |||
<console> | <console> | ||
| Line 54: | Line 51: | ||
</console> | </console> | ||
Next, clone the master git repository as follows: | |||
<console> | <console> | ||
| Line 62: | Line 59: | ||
</console> | </console> | ||
You will now have a directory called <tt>/root/metro</tt> that contains all the [[Metro]] source code. | |||
Metro is now installed. It's time to customize it for your local system. | |||
= | = Configuring Metro = | ||
{{Note|Metro | {{Note|Metro is not currently able to build Gentoo stages. See {{Bug|FL-901}}.}} | ||
[[User:Drobbins|Daniel Robbins]] | [[User:Drobbins|Daniel Robbins]] maintains [[Metro]], so it comes pre-configured to successfully build Funtoo Linux releases. Before reading further, you might want to customize some basic settings like the number of concurrent jobs to fit your hardware's capabilities or the directory to use for produced stage archives. This is accomplished by editing <tt>~/.metro</tt> which is the [[Metro]]'s master configuration file. | ||
Please note that <code>path/install</code> must point to where metro was installed. Point <code>path/distfiles</code> to where your distfiles reside. Also set <code>path/mirror/owner</code> and <code>path/mirror/group</code> to the owner and group of all the files that will be written to the build repository directory, which by default (as per the configuration file) is at <code>/home/mirror/funtoo</code>. The cache directory normally resides inside the temp directory -- this can be modified as desired. The cache directory can end up holding many cached .tbz2 packages, and eat up a lot of storage. You may want to place the temp directory on faster storage, for faster compile times, and place the cache directory on slower, but more plentiful storage. | |||
{{file|name=.metro|desc=Metro configuration|body= | {{file|name=.metro|desc=Metro configuration|body= | ||
| Line 103: | Line 100: | ||
}} | }} | ||
== Arch | == Arch and Subarch == | ||
In the following example we are creating a pentium4 stage 3 compiled for x86-32bit binary compatibility. Pentium4 is a subarch of the x86-32bit architecture. Once you have metro installed you may find a full list of each subarch in your <tt>/root/metro/subarch</tt> directory each subarch will have the file extension .spec | |||
Example: | Example: | ||
<console> | <console> | ||
| Line 124: | Line 121: | ||
</console> | </console> | ||
= | = First stages build (local build) = | ||
To get this all started, we need to bootstrap the process by downloading an initial seed stage3 to use for building and place it in its proper location in <tt>/home/mirror/funtoo</tt>, so that [[Metro]] can find it. We will also need to create some special "control" files in <tt>/home/mirror/funtoo</tt>, which will allow [[Metro]] to understand how it is supposed to proceed. | |||
== | == Step 1: Set up pentium4 repository (local build) == | ||
Assuming we're following the basic steps outlined in the previous section, and building an unstable funtoo (<tt>funtoo-current</tt>) build for the <tt>pentium4</tt>, using a generic <tt>pentium4</tt> stage3 as a seed stage, then here the first set of steps we'd perform: | |||
<console> | <console> | ||
| Line 147: | Line 144: | ||
</console> | </console> | ||
OK, | OK, let's review the steps above. First, we create the directory <tt>/home/mirror/funtoo/funtoo-current/x86-32bit/pentium4</tt>, which is where Metro will expect to find unstable <tt>funtoo-current</tt> pentium4 builds -- it is configured to look here by default. Then we create a specially-named directory to house our seed x86 stage3. Again, by default, Metro expects the directory to be named this way. We enter this directory, and download our seed x86 stage3 from funtoo.org. Note that the <tt>2010-12-24</tt> version stamp matches. Make sure that your directory name matches the stage3 name too. Everything has been set up to match Metro's default filesystem layout. | ||
Next, we go back to the <tt>/home/mirror/metro/funtoo-current/x86-32bit/pentium4</tt> directory, and inside it, we create a <tt>.control</tt> directory. This directory and its subdirectories contain special files that Metro references to determine certain aspects of its behavior. The <tt>.control/version/stage3</tt> file is used by Metro to track the most recently-built stage3 for this particular build and subarch. Metro will automatically update this file with a new version stamp after it successfully builds a new stage3. But because Metro didn't actually ''build'' this stage3, we need to set up the <tt>.control/version/stage3</tt> file manually. This will allow Metro to find our downloaded stage3 when we set up our pentium4 build to use it as a seed. Also note that Metro will create a similar <tt>.control/version/stage1</tt> file after it successfully builds an pentium4 funtoo-current stage1. | |||
We also set up <tt>.control/strategy/build</tt> and <tt>.control/strategy/seed</tt> files with values of <tt>local</tt> and <tt>stage3</tt> respectively. These files define the building strategy Metro will use when we build pentium4 funtoo-current stages. With a build strategy of <tt>local</tt>, Metro will source its seed stage from funtoo-current pentium4, the current directory. And with a seed strategy of <tt>stage3</tt>, Metro will use a stage3 as a seed, and use this seed to build a new stage1, stage2 and stage3. | |||
== | == Step 2: Building the pentium4 stages == | ||
Incidentally, if all you wanted to do at this point was to build a new pentium4 funtoo-current stage1/2/3 (plus openvz and vserver templates). You would begin the process by typing: | |||
<console> | <console> | ||
| Line 162: | Line 159: | ||
</console> | </console> | ||
If you have a slow machine, it could take several hours to be completed because several "heavy" components like gcc or glibc have to be recompiled in each stage. Once a stage has been successfully completed, it is placed in the <tt>"${METRO_MIRROR}/funtoo-current/x32-bit/pentium4/YYYY-MM-DD"</tt> subdirectory, where <tt>YYYY-MM-DD</tt> is today's date at the time the <tt>ezbuild.sh</tt> script was started or the date you put on the ezscript.sh command line. | |||
= | = Building for another binary compatible architecture (remote build) = | ||
As written above, [[Metro]] is able to perform '''remote build''' building different architecture stage3 from a binary compatible seeding stage3 (e.g. using a pentium4 stage3 to seed a <tt>Intel Core2 32bits</tt> stage3). | |||
In the Metro terminology this is called a '''remote build''' (a stage 3 of a different, but binary compatible, architecture is used as a seed). | |||
What's not compatible? You can't use a <tt>Sparc</tt> architecture to generate an <tt>x86</tt> or <tt>ARM</tt> based stage and vice-versa. If you use a 32bit stage then you don't want to seed a 64bit build from it. Be sure that you are using a stage from the same architecture that you are trying to seed. Check [http://ftp.osuosl.org/pub/funtoo/funtoo-current/ Funtoo-current FTP Mirror] for a stage that is from the same Architecture that you will be building. | |||
{{Note| | {{Note|Often, one build (ie. funtoo-current) can be used as a seed for another build such as funtoo-stable. However, hardened builds require hardened stages as seeds in order for the build to complete successfully.}} | ||
== | == Step 1: Set up Core_2 32bit repository == | ||
In this example, we're going to use this pentium4 funtoo-current stage3 to seed a new Core_2 32bit funtoo-current build. To get that done, we need to set up the pentium4 build directory as follows: | |||
<console> | <console> | ||
| Line 190: | Line 187: | ||
</console> | </console> | ||
The steps we follow are similar to those we performed for a ''local build'' to set up our pentium4 directory for local build. However, note the differences. We didn't download a stage, because we are going to use the pentium4 stage to build a new Core_2 32bit stage. We also didn't create the <tt>.control/version/stage{1,3}</tt> files because Metro will create them for us after it successfully builds a new stage1 and stage3. We are still using a <tt>stage3</tt> seed strategy, but we've set the build strategy to <tt>remote</tt>, which means that we're going to use a seed stage that's not from this particular subdirectory. Where are we going to get it from? The <tt>.control/remote</tt> directory contains this information, and lets Metro know that it should look for its seed stage3 in the <tt>/home/mirror/funtoo/funtoo-current/x86-32bit/pentium4</tt> directory. Which one will it grab? You guessed it -- the most recently built ''stage3'' (since our seed strategy was set to <tt>stage3</tt>) that has the version stamp of <tt>2010-12-24</tt>, as recorded in <tt>/home/mirror/funtoo-current/x86-32bit/pentium4/.control/version/stage</tt>. Now you can see how all those control files come together to direct Metro to do the right thing. | |||
{{Note|<code>arch_desc</code> | {{Note|<code>arch_desc</code> should be set to one of: <code>x86-32bit</code>, <code>x86-64bit</code> or <code>pure64</code> for PC-compatible systems. You must use a 32-bit build as a seed for other 32-bit builds, and a 64-bit build as a seed for other 64-bit builds.}} | ||
== | == Step 2: Building the Core_2 32bit stages == | ||
Now, you could start building your new Core_2 32bit stage1/2/3 (plus openvz and vserver templates) by typing the following: | |||
<console> | <console> | ||
| Line 202: | Line 199: | ||
</console> | </console> | ||
In that case, the produced stages are placed in the <tt>/home/mirror/funtoo/funtoo-current/x32-bit/core2_32/YYYY-MM-DD</tt> subdirectory. | |||
== | == Step 3: The Next Build == | ||
At this point, you now have a new Core_2 32bit stage3, built using a "remote" pentium4 stage3. Once the first remote build completes successfully, metro will automatically change <code>.control/strategy/build</code> to be <code>local</code> instead of <code>remote</code>, so it will use the most recently-built Core_2 32bit stage3 as a seed for any new Core_2 32bit builds from now on. | |||
= | = Build your own tailored stage3 = | ||
Metro | Metro can be easily configured for building custom stage3 by including additional packages. Edit the following configuration file <tt>/root/metro/etc/builds/funtoo-current/build.conf</tt>: | ||
{{file|name=funtoo-current/build.conf|body= | {{file|name=funtoo-current/build.conf|body= | ||
[collect ../../fslayouts/funtoo/layout.conf] | [collect ../../fslayouts/funtoo/layout.conf] | ||
| Line 287: | Line 284: | ||
}} | }} | ||
= | = Building Gentoo stages = | ||
Metro | Metro can also build Gentoo stages. After switching to Funtoo profile, see http://www.funtoo.org/Funtoo_Profiles metro require additional steps for this. We have an open bug for this -- it is simply due to the fact that we focus on ensuring Funtoo Linux builds and building Gentoo is a lower priority. Historical note: Funtoo Linux originally started as a fork of Gentoo Linux so that metro could reliably build Gentoo stages. | ||
http://www.funtoo.org | http://www.funtoo.org/Funtoo_Profiles | ||
= | = Advanced Features = | ||
Metro | Metro also includes a number of advanced features that can be used to automate builds and set up distributed build servers. These features require you to {{c|emerge sqlalchemy}}, as SQLite is used as a dependency. | ||
== | == Repository Management == | ||
Metro | Metro includes a script in the {{c|scripts}} directory called {{c|buildrepo}}. Buildrepo serves as the heart of Metro's advanced repository management features. | ||
=== | === Initial Setup === | ||
To use {{c|buildrepo}}, you will first need to create a {{f|.buildbot}} configuration file. Here is the file I use on my AMD Jaguar build server: | |||
{{file|name=/root/.buildbot|lang=python|body= | {{file|name=/root/.buildbot|lang=python|body= | ||
| Line 330: | Line 327: | ||
}} | }} | ||
This file is actually a python source file that defines the tuples {{c|builds}}, {{c|arches}} and {{c|subarches}}. These variables tell {{c|buildrepo}} which builds, arches and subarches it should manage. A {{c|map_build()}} function is also defined which {{c|buildbot}} uses to determine what kind of build to perform. The arguments passed to the function are based on the last successful build. The function can read these arguments and return a string to define the type of the next build. In the above example, the {{c|map_build()}} function will cause the next build after a freshen build to be a full build, and the next build after a full build to be a freshen build, so that the build will alternate between full and freshen. | |||
== Builds | == Automated Builds == | ||
Once the {{c|.buildbot}} file has been created, the {{c|buildrepo}} and {{c|buildbot.sh}} tools are ready to use. Here's how they work. These tools are designed to keep your repository ({{c|path/mirror}} in {{f|/root/.metro}} up-to-date by inspecting your repository and looking for stages that are out-of-date. | |||
To list the next build that will be performed, do this -- this is from my ARM build server: | |||
{{console|body= | {{console|body= | ||
| Line 350: | Line 347: | ||
}} | }} | ||
If no output is displayed, then all your builds are up-to-date. | |||
To actually run the next build, run {{c|buildbot.sh}}: | |||
{{console|body= | {{console|body= | ||
| Line 358: | Line 355: | ||
}} | }} | ||
If you're thinking that {{c|buildbot.sh}} would be a good candidate for a cron job, you've got the right idea! | |||
=== | === List Builds === | ||
To get a quick look at our repository, let's run the {{c|buildrepo fails}} command: | |||
{{console|body= | {{console|body= | ||
| Line 374: | Line 371: | ||
}} | }} | ||
On my AMD Jaguar build server, on Feb 20, 2015, this lists all the builds that {{c|buildrepo}} has been configured to manage. The first number on each line is a '''failcount''', which is the number of consecutive times that the build has failed. A zero value indicates that everything's okay. The failcount is an important feature of the advanced repository management features. Here are a number of behaviors that are implemented based on failcount: | |||
* If {{c|buildbot.sh}} | * If {{c|buildbot.sh}} tries to build a stage and the build fails, the failcount is incremented. | ||
* | * If the build succeeds for a particular build, the failcount is reset to zero. | ||
* | * Builds with the lowest failcount are prioritized by {{buildrepo}} to build next, to steer towards builds that are more likely to complete successfully. | ||
* | * Once the failcount reaches 3 for a particular build, it is removed from the build rotation. | ||
=== Resetting Failcount === | === Resetting Failcount === | ||
| Line 392: | Line 389: | ||
}} | }} | ||
== | == Repository Maintenance == | ||
A couple of repository maintenance tools are provided: | |||
* {{c|buildrepo digestgen}} | * {{c|buildrepo digestgen}} will generate hash files for the archives in your repository, and clean up stale hashes. | ||
* {{c|buildrepo index.xml}} | * {{c|buildrepo index.xml}} will create an index.xml file at the root of your repository, listing all builds available. | ||
* {{c|buildrepo clean}} | * {{c|buildrepo clean}} will output a shell script that will remove old stages. No more than the three most recent stage builds for each build/arch/subarch are kept. | ||
== | == Distributed Repositories == | ||
In many situation, you will have a number of build servers, and each will build a subset of your master repository, and then upload builds to the master repository. This is an area of Metro that is being actively developed. For now, automated upload functionality is not enabled, but is expected to be implemented in the relatively near future. However, it is possible to have your master repository differentiate between subarches that are built locally, and thus should be part of that system's {{c|buildbot}} build rotation, and those that are stored locally and built remotely. These builds should be cleaned when {{c|buildrepo clean}} is run, but should not enter the local build rotation. To set this up, modify {{f|/root/.buildbot}} and use the {{c|subarches}} and {{c|all_subarches}} variables: | |||
{{file|name=/root/.metro|desc=Excerpt of .metro config for master repository|body= | {{file|name=/root/.metro|desc=Excerpt of .metro config for master repository|body= | ||
| Line 450: | Line 447: | ||
[[Category:HOWTO]] | [[Category:HOWTO]] | ||
[[Category:Metro]] | [[Category:Metro]] | ||
__TOC__ | __TOC__ | ||
Revision as of 17:30, July 12, 2015
{{#layout:doc}}Metro is the build system for Funtoo Linux and Gentoo Linux stages. It automates the bootstrapping process.
This tutorial will take you through installing, setting up and running Metro.
Other Metro Documentation is available.
Preface
How Metro Works
Metro is the Funtoo Linux automated build system, and is used to build Funtoo Linux stage tarballs.
Metro cannot create a stage tarball out of thin air. To build a new stage tarball, Metro must use an existing, older stage tarball called a "seed" stage. This seed stage typically is used as the build environment for creating the stage we want.
Metro can use two kinds of seed stages. Traditionally, Metro has used a stage3 as a seed stage. This stage3 is then used to build a new stage1, which in turn is used to build a new stage2, and then a new stage3. This is generally the most reliable way to build Gentoo Linux or Funtoo Linux, so it's the recommended approach.
After switching metro builds to Funtoo profile, Gentoo stages are no longer provided!
Seeds and Build Isolation
Another important concept to mention here is something called build isolation. Because Metro creates an isolated build environment, and the build environment is explicitly defined using existing, tangible entities -- a seed stage and a portage snapshot -- you will get consistent, repeatable results. In other words, the same seed stage, portage snapshot and build instructions will generate an essentially identical result, even if you perform the build a month later on someone else's workstation.
Local Build
Say you wanted to build a new pentium4 stage3 tarball. The recommended method of doing this would be to grab an existing pentium4 stage3 tarball to use as your seed stage. Metro will be told to use this existing pentium4 stage3 to build a new stage1 for the same pentium4. For this process, the generic pentium4 stage3 would provide the build environment for creating our new stage1. Then, the new stage1 would serve as the build environment for creating the new pentium4 stage2. And the new pentium4 stage2 would serve as the build environment for creating the new pentium4 stage3.
In the Metro terminology this is called a local build, which means a stage3 of a given architecture is used to seed a brand new build of the same architecture. Incidentally this will be the first exercise we are going to perform in this tutorial.
A week later, you may want to build a brand new pentium4 stage3 tarball. Rather than starting from the original pentium4 stage3 again, you'd probably configure Metro to use the most-recently-built pentium4 stage3 as the seed. Metro has built-in functionality to make this easy, allowing it to easily find and track the most recent stage3 seed available.
Remote Build
Metro can also perform remote build, where a stage3 of a different, but binary compatible, architecture is used as a seed to build a different architecture stage3. Consequentiality the second exercise we are going to perform in this tutorial will be to build a core2 32bit stage3 tarball from the pentium4 stage3 tarball we have just built.
TODO: add caveats about what archs can be seeded and what can be not (maybe a table?)
Tailored Build
Last, it's also worthy noting that both in local and remote builds, Metro can be configured to add and/or remove individual packages to the final tarball. Let's say you can't live without app-misc/screen, at the end of this tutorial, we will show how to have your tailored stage3 to include it.
Installing Metro
The recommended and supported method is to use the Git repository of Metro.
Ensure that dev-vcs/git and No results (optional; required for EC2 support) are installed on your system:
root # emerge dev-vcs/git root # emerge dev-python/boto
Next, clone the master git repository as follows:
root # cd /root root # git clone git://github.com/funtoo/metro.git root # cp /root/metro/metro.conf ~/.metro
You will now have a directory called /root/metro that contains all the Metro source code.
Metro is now installed. It's time to customize it for your local system.
Configuring Metro
Metro is not currently able to build Gentoo stages. See FL-901.
Daniel Robbins maintains Metro, so it comes pre-configured to successfully build Funtoo Linux releases. Before reading further, you might want to customize some basic settings like the number of concurrent jobs to fit your hardware's capabilities or the directory to use for produced stage archives. This is accomplished by editing ~/.metro which is the Metro's master configuration file.
Please note that path/install must point to where metro was installed. Point path/distfiles to where your distfiles reside. Also set path/mirror/owner and path/mirror/group to the owner and group of all the files that will be written to the build repository directory, which by default (as per the configuration file) is at /home/mirror/funtoo. The cache directory normally resides inside the temp directory -- this can be modified as desired. The cache directory can end up holding many cached .tbz2 packages, and eat up a lot of storage. You may want to place the temp directory on faster storage, for faster compile times, and place the cache directory on slower, but more plentiful storage.
.metro - Metro configuration# Main metro configuration file - these settings need to be tailored to your install:
[section path]
install: /root/metro
tmp: /var/tmp/metro
cache: $[path/tmp]/cache
distfiles: /var/src/distfiles
work: $[path/tmp]/work/$[target/build]/$[target/name]
[section path/mirror]
: /home/mirror/funtoo
owner: root
group: repomgr
dirmode: 775
[section portage]
MAKEOPTS: auto
[section emerge]
options: --jobs=4 --load-average=4 --keep-going=n
# This line should not be modified:
[collect $[path/install]/etc/master.conf]
Arch and Subarch
In the following example we are creating a pentium4 stage 3 compiled for x86-32bit binary compatibility. Pentium4 is a subarch of the x86-32bit architecture. Once you have metro installed you may find a full list of each subarch in your /root/metro/subarch directory each subarch will have the file extension .spec Example:
root # ls /root/metro/subarch root # ls subarch/ amd64-bulldozer-pure64.spec armv7a.spec core-avx-i.spec i686.spec pentium.spec amd64-bulldozer.spec armv7a_hardfp.spec core2_32.spec k6-2.spec pentium2.spec amd64-k10-pure64.spec athlon-4.spec core2_64-pure64.spec k6-3.spec pentium3.spec amd64-k10.spec athlon-mp.spec core2_64.spec k6.spec pentium4.spec amd64-k8+sse3.spec athlon-tbird.spec corei7-pure64.spec native_32.spec pentiumpro.spec amd64-k8+sse3_32.spec athlon-xp.spec corei7.spec native_64.spec prescott.spec amd64-k8-pure64.spec athlon.spec generic_32.spec niagara.spec ultrasparc.spec amd64-k8.spec atom_32.spec generic_64-pure64.spec niagara2.spec ultrasparc3.spec amd64-k8_32.spec atom_64-pure64.spec generic_64.spec nocona.spec xen-pentium4+sse3.spec armv5te.spec atom_64.spec generic_sparcv9.spec opteron_64.spec xen-pentium4+sse3_64.spec armv6j.spec btver1.spec geode.spec pentium-m.spec armv6j_hardfp.spec btver1_64.spec i486.spec pentium-mmx.spec
First stages build (local build)
To get this all started, we need to bootstrap the process by downloading an initial seed stage3 to use for building and place it in its proper location in /home/mirror/funtoo, so that Metro can find it. We will also need to create some special "control" files in /home/mirror/funtoo, which will allow Metro to understand how it is supposed to proceed.
Step 1: Set up pentium4 repository (local build)
Assuming we're following the basic steps outlined in the previous section, and building an unstable funtoo (funtoo-current) build for the pentium4, using a generic pentium4 stage3 as a seed stage, then here the first set of steps we'd perform:
root # install -d /home/mirror/funtoo/funtoo-current/x86-32bit/pentium4 root # install -d /home/mirror/funtoo/funtoo-current/snapshots root # cd /home/metro/mirror/funtoo/funtoo-current/x86-32bit/pentium4 root # install -d 2011-12-13 root # cd 2011-12-13 root # wget -c http://ftp.osuosl.org/pub/funtoo/funtoo-current/x86-32bit/pentium4/2011-12-13/stage3-pentium4-funtoo-current-2011-12-13.tar.xz root # cd .. root # install -d .control/version root # echo "2011-12-13" > .control/version/stage3 root # install -d .control/strategy root # echo local > .control/strategy/build root # echo stage3 > .control/strategy/seed
OK, let's review the steps above. First, we create the directory /home/mirror/funtoo/funtoo-current/x86-32bit/pentium4, which is where Metro will expect to find unstable funtoo-current pentium4 builds -- it is configured to look here by default. Then we create a specially-named directory to house our seed x86 stage3. Again, by default, Metro expects the directory to be named this way. We enter this directory, and download our seed x86 stage3 from funtoo.org. Note that the 2010-12-24 version stamp matches. Make sure that your directory name matches the stage3 name too. Everything has been set up to match Metro's default filesystem layout.
Next, we go back to the /home/mirror/metro/funtoo-current/x86-32bit/pentium4 directory, and inside it, we create a .control directory. This directory and its subdirectories contain special files that Metro references to determine certain aspects of its behavior. The .control/version/stage3 file is used by Metro to track the most recently-built stage3 for this particular build and subarch. Metro will automatically update this file with a new version stamp after it successfully builds a new stage3. But because Metro didn't actually build this stage3, we need to set up the .control/version/stage3 file manually. This will allow Metro to find our downloaded stage3 when we set up our pentium4 build to use it as a seed. Also note that Metro will create a similar .control/version/stage1 file after it successfully builds an pentium4 funtoo-current stage1.
We also set up .control/strategy/build and .control/strategy/seed files with values of local and stage3 respectively. These files define the building strategy Metro will use when we build pentium4 funtoo-current stages. With a build strategy of local, Metro will source its seed stage from funtoo-current pentium4, the current directory. And with a seed strategy of stage3, Metro will use a stage3 as a seed, and use this seed to build a new stage1, stage2 and stage3.
Step 2: Building the pentium4 stages
Incidentally, if all you wanted to do at this point was to build a new pentium4 funtoo-current stage1/2/3 (plus openvz and vserver templates). You would begin the process by typing:
root # cd /root/metro root # scripts/ezbuild.sh funtoo-current pentium4
If you have a slow machine, it could take several hours to be completed because several "heavy" components like gcc or glibc have to be recompiled in each stage. Once a stage has been successfully completed, it is placed in the "${METRO_MIRROR}/funtoo-current/x32-bit/pentium4/YYYY-MM-DD" subdirectory, where YYYY-MM-DD is today's date at the time the ezbuild.sh script was started or the date you put on the ezscript.sh command line.
Building for another binary compatible architecture (remote build)
As written above, Metro is able to perform remote build building different architecture stage3 from a binary compatible seeding stage3 (e.g. using a pentium4 stage3 to seed a Intel Core2 32bits stage3).
In the Metro terminology this is called a remote build (a stage 3 of a different, but binary compatible, architecture is used as a seed). What's not compatible? You can't use a Sparc architecture to generate an x86 or ARM based stage and vice-versa. If you use a 32bit stage then you don't want to seed a 64bit build from it. Be sure that you are using a stage from the same architecture that you are trying to seed. Check Funtoo-current FTP Mirror for a stage that is from the same Architecture that you will be building.
Often, one build (ie. funtoo-current) can be used as a seed for another build such as funtoo-stable. However, hardened builds require hardened stages as seeds in order for the build to complete successfully.
Step 1: Set up Core_2 32bit repository
In this example, we're going to use this pentium4 funtoo-current stage3 to seed a new Core_2 32bit funtoo-current build. To get that done, we need to set up the pentium4 build directory as follows:
root # cd /home/mirror/funtoo/funtoo-current/x86-32bit root # install -d core2_32 root # cd core2_32 root # install -d .control/strategy root # echo remote > .control/strategy/build root # echo stage3 > .control/strategy/seed root # install -d .control/remote root # echo funtoo-current > .control/remote/build root # echo x86-32bit > .control/remote/arch_desc root # echo pentium4 > .control/remote/subarch
The steps we follow are similar to those we performed for a local build to set up our pentium4 directory for local build. However, note the differences. We didn't download a stage, because we are going to use the pentium4 stage to build a new Core_2 32bit stage. We also didn't create the .control/version/stage{1,3} files because Metro will create them for us after it successfully builds a new stage1 and stage3. We are still using a stage3 seed strategy, but we've set the build strategy to remote, which means that we're going to use a seed stage that's not from this particular subdirectory. Where are we going to get it from? The .control/remote directory contains this information, and lets Metro know that it should look for its seed stage3 in the /home/mirror/funtoo/funtoo-current/x86-32bit/pentium4 directory. Which one will it grab? You guessed it -- the most recently built stage3 (since our seed strategy was set to stage3) that has the version stamp of 2010-12-24, as recorded in /home/mirror/funtoo-current/x86-32bit/pentium4/.control/version/stage. Now you can see how all those control files come together to direct Metro to do the right thing.
arch_desc should be set to one of: x86-32bit, x86-64bit or pure64 for PC-compatible systems. You must use a 32-bit build as a seed for other 32-bit builds, and a 64-bit build as a seed for other 64-bit builds.
Step 2: Building the Core_2 32bit stages
Now, you could start building your new Core_2 32bit stage1/2/3 (plus openvz and vserver templates) by typing the following:
root # /root/metro/scripts/ezbuild.sh funtoo-current core2_32
In that case, the produced stages are placed in the /home/mirror/funtoo/funtoo-current/x32-bit/core2_32/YYYY-MM-DD subdirectory.
Step 3: The Next Build
At this point, you now have a new Core_2 32bit stage3, built using a "remote" pentium4 stage3. Once the first remote build completes successfully, metro will automatically change .control/strategy/build to be local instead of remote, so it will use the most recently-built Core_2 32bit stage3 as a seed for any new Core_2 32bit builds from now on.
Build your own tailored stage3
Metro can be easily configured for building custom stage3 by including additional packages. Edit the following configuration file /root/metro/etc/builds/funtoo-current/build.conf:
funtoo-current/build.conf [collect ../../fslayouts/funtoo/layout.conf]
[section release]
author: Daniel Robbins <drobbins@funtoo.org>
[section target]
compression: xz
[section portage]
FEATURES:
SYNC: $[snapshot/source/remote]
USE:
[section profile]
format: new
path: gentoo:funtoo/1.0/linux-gnu
arch: $[:path]/arch/$[target/arch_desc]
build: $[:path]/build/current
flavor: $[:path]/flavor/core
mix-ins:
[section version]
python: 2.7
[section emerge]
[section snapshot]
type: live
compression: xz
[section snapshot/source]
type: git
branch: funtoo.org
# branch to have checked out for tarball:
branch/tar: origin/master
name: ports-2012
remote: git://github.com/funtoo/ports-2012.git
options: pull
[section metro]
options:
options/stage: cache/package
target: gentoo
[section baselayout]
services: sshd
[section multi]
snapshot: snapshot
[section files]
motd/trailer: [
>>> Send suggestions, improvements, bug reports relating to...
>>> This release: $[release/author]
>>> Funtoo Linux (general): Funtoo Linux (http://www.funtoo.org)
>>> Gentoo Linux (general): Gentoo Linux (http://www.gentoo.org)
]
[collect ../../multi-targets/$[multi/mode:zap]]
Building Gentoo stages
Metro can also build Gentoo stages. After switching to Funtoo profile, see http://www.funtoo.org/Funtoo_Profiles metro require additional steps for this. We have an open bug for this -- it is simply due to the fact that we focus on ensuring Funtoo Linux builds and building Gentoo is a lower priority. Historical note: Funtoo Linux originally started as a fork of Gentoo Linux so that metro could reliably build Gentoo stages. http://www.funtoo.org/Funtoo_Profiles
Advanced Features
Metro also includes a number of advanced features that can be used to automate builds and set up distributed build servers. These features require you to emerge sqlalchemy, as SQLite is used as a dependency.
Repository Management
Metro includes a script in the scripts directory called buildrepo. Buildrepo serves as the heart of Metro's advanced repository management features.
Initial Setup
To use buildrepo, you will first need to create a .buildbot configuration file. Here is the file I use on my AMD Jaguar build server:
/root/.buildbot (python source code) builds = (
"funtoo-current",
"funtoo-current-hardened",
"funtoo-stable",
)
arches = (
"x86-64bit",
"pure64"
)
subarches = (
"amd64-jaguar",
"amd64-jaguar-pure64",
)
def map_build(build, subarch, full, full_date):
# arguments refer to last build...
if full == True:
buildtype = ( "freshen", )
else:
buildtype = ("full", )
return buildtype
This file is actually a python source file that defines the tuples builds, arches and subarches. These variables tell buildrepo which builds, arches and subarches it should manage. A map_build() function is also defined which buildbot uses to determine what kind of build to perform. The arguments passed to the function are based on the last successful build. The function can read these arguments and return a string to define the type of the next build. In the above example, the map_build() function will cause the next build after a freshen build to be a full build, and the next build after a full build to be a freshen build, so that the build will alternate between full and freshen.
Automated Builds
Once the .buildbot file has been created, the buildrepo and buildbot.sh tools are ready to use. Here's how they work. These tools are designed to keep your repository (path/mirror in /root/.metro up-to-date by inspecting your repository and looking for stages that are out-of-date.
To list the next build that will be performed, do this -- this is from my ARM build server:
root # ./buildrepo nextbuild build=funtoo-current arch_desc=arm-32bit subarch=armv7a_hardfp fulldate=2015-02-08 nextdate=2015-02-20 failcount=0 target=full extras=''
If no output is displayed, then all your builds are up-to-date.
To actually run the next build, run buildbot.sh:
root # ./buildbot.sh
If you're thinking that buildbot.sh would be a good candidate for a cron job, you've got the right idea!
List Builds
To get a quick look at our repository, let's run the buildrepo fails command:
root # ./buildrepo fails 0 2015-02-18 /home/mirror/funtoo/funtoo-current/x86-64bit/amd64-jaguar 0 2015-02-18 /home/mirror/funtoo/funtoo-current/pure64/amd64-jaguar-pure64 0 2015-02-18 /home/mirror/funtoo/funtoo-current-hardened/x86-64bit/amd64-jaguar 0 2015-02-18 /home/mirror/funtoo/funtoo-current-hardened/pure64/amd64-jaguar-pure64 0 2015-02-18 /home/mirror/funtoo/funtoo-stable/x86-64bit/amd64-jaguar 0 2015-02-18 /home/mirror/funtoo/funtoo-stable/pure64/amd64-jaguar-pure64
On my AMD Jaguar build server, on Feb 20, 2015, this lists all the builds that buildrepo has been configured to manage. The first number on each line is a failcount, which is the number of consecutive times that the build has failed. A zero value indicates that everything's okay. The failcount is an important feature of the advanced repository management features. Here are a number of behaviors that are implemented based on failcount:
- If
buildbot.shtries to build a stage and the build fails, the failcount is incremented. - If the build succeeds for a particular build, the failcount is reset to zero.
- Builds with the lowest failcount are prioritized by Template:Buildrepo to build next, to steer towards builds that are more likely to complete successfully.
- Once the failcount reaches 3 for a particular build, it is removed from the build rotation.
Resetting Failcount
If a build has issues, the failcount for a build will reach 3, at which point it will be pulled out of build rotation. To clear failcount, so that these builds are attempted again -- possibly fixed by new updates to the Portage tree -- use buildrepo zap:
root # /root/metro/scripts/buildrepo zap Removing /mnt/data/funtoo/funtoo-current/arm-32bit/armv7a_hardfp/.control/.failcount... Removing /mnt/data/funtoo/funtoo-current/arm-32bit/armv6j_hardfp/.control/.failcount... Removing /mnt/data/funtoo/funtoo-current/arm-32bit/armv5te/.control/.failcount...
Repository Maintenance
A couple of repository maintenance tools are provided:
buildrepo digestgenwill generate hash files for the archives in your repository, and clean up stale hashes.buildrepo index.xmlwill create an index.xml file at the root of your repository, listing all builds available.buildrepo cleanwill output a shell script that will remove old stages. No more than the three most recent stage builds for each build/arch/subarch are kept.
Distributed Repositories
In many situation, you will have a number of build servers, and each will build a subset of your master repository, and then upload builds to the master repository. This is an area of Metro that is being actively developed. For now, automated upload functionality is not enabled, but is expected to be implemented in the relatively near future. However, it is possible to have your master repository differentiate between subarches that are built locally, and thus should be part of that system's buildbot build rotation, and those that are stored locally and built remotely. These builds should be cleaned when buildrepo clean is run, but should not enter the local build rotation. To set this up, modify /root/.buildbot and use the subarches and all_subarches variables:
/root/.metro - Excerpt of .metro config for master repository# subarches we are building locally:
subarches = (
"pentium4",
"athlon-xp",
"corei7",
"corei7-pure64",
"generic_32",
"i686",
"amd64-k8",
"amd64-k8-pure64",
"core2_64",
"core2_64-pure64",
"generic_64",
"generic_64-pure64",
)
# Things we need to clean, even if we may not be building:
all_subarches = subarches + (
"atom_32",
"atom_64",
"atom_64-pure64",
"amd64-k10",
"amd64-k10-pure64",
"amd64-bulldozer",
"amd64-bulldozer-pure64",
"amd64-steamroller",
"amd64-steamroller-pure64",
"amd64-piledriver",
"amd64-piledriver-pure64",
"amd64-jaguar",
"amd64-jaguar-pure64",
"intel64-haswell",
"intel64-haswell-pure64",
"intel64-ivybridge-pure64",
"intel64-ivybridge",
"armv7a_hardfp",
"armv6j_hardfp",
"armv5te"
)