Difference between pages "Funtoo Linux Kernels" and "Metro"

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This Section will give you an overview of kernels used in funtoo.
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[[Metro]] is the build system for Funtoo Linux and [[Gentoo Linux]] stages. It automates the bootstrapping process.
  
Funtoo Linux provides a number of new kernels for your use. This is the official page for all Funtoo Linux kernel information.  
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This tutorial will take you through installing, setting up and running [[Metro]].
  
Some points of interest:
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These other Metro documents are also available:
  
* Most Funtoo Linux kernels support the handy ''<code>[[#Binary USE|binary]]</code>'' USE flag, described below.
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{{#ask: [[Category:Metro]]
* Funtoo Linux offers quality kernels from other Linux Distributions, like ''<code>ubuntu-server</code>'' and ''<code>debian-sources</code>''.
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|format=ul
* A detailed [[#Kernel Features and Stability|Kernel Features and Stability]] table can be found below.
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}}
* Advanced users may want to take a look at [[Additional Kernel Resources]].
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* There is a quick'n dirty howto to compile your own [[kernel]] with initramfs the funtoo way.
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== Overview of Kernels ==
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= Preface =  
  
=== sysrescue-std-sources --> {{Package|sys-kernel/sysrescue-std-sources}} ===
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== How Metro Works ==  
  
This kernel is from the [http://www.sysresccd.org SystemRescueCD project], and is based on Fedora 14/15, plus some other patches related to booting from a live CD. It is a quality kernel, and is generally pretty stable. It is not suitable for production servers but is a good choice for Funtoo Linux desktops. Earlier,the [[Funtoo Linux Installation]] Guide recommended this kernel for general users, but now 'debian-sources' is recommended. Note however,  that by design all audio functions are removed from SystemRescue,  ie no sound when using this kernel.
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Metro is the Funtoo Linux automated build system, and is used to build Funtoo Linux stage tarballs.
  
=== vanilla-sources --> {{Package|sys-kernel/vanilla-sources}} ===
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[[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.
  
This will install the "vanilla" (unmodified) Linux kernel sources. Current recommended version is 3.x. Funtoo Linux fully supports Linux 3.x. The advantages of this kernel include recent improvements to [[Linux Containers]], a very modern networking stack with lots of bug fixes, and high reliability for desktops and servers. The downside is that this kernel must be manually configured by the user and does not have built-in ''<code>genkernel</code>'' support via the ''<code>binary</code>'' USE flag at this time.
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[[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|'''After switching metro builds to Funtoo profile, Gentoo stages are no longer provided'''!}}
  
=== gentoo-sources --> {{Package|sys-kernel/gentoo-sources}} ===
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== Seeds and Build Isolation ==
  
This kernel tree is based on stable kernels from [https://www.kernel.org/ kernel.org] with genpatches applied [http://dev.gentoo.org/~mpagano/genpatches/about.htm genpatches].
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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.
Gentoo patchset aims to support the entire range of Gentoo-supported architectures. List of available genpatched kernels: [http://dev.gentoo.org/~mpagano/genpatches/kernels.htm genpatches-kernels]
+
  
=== openvz-rhel6-stable --> {{Package|sys-kernel/openvz-rhel6-stable}} ===
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== Local Build ==  
  
This is a RHEL6-based kernel with OpenVZ support. This kernel is now the preferred kernel for production OpenVZ deployments. It requires gcc-4.4.5 to build, which it will use automatically without the user needing to use ''<code>gcc-config</code>''. We use this version of gcc since this is the version of gcc used by Red Hat to build this kernel.
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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.
  
=== openvz-rhel5-stable --> {{Package|sys-kernel/openvz-rhel5-stable}} ===
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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.
  
This kernel is based on the latest Red Hat Enterprise Linux 5.6 kernel, and contains additional OpenVZ (virtual containers) patches from the [[OpenVZ on Funtoo Linux|OpenVZ]] project. It is a very stable and reliable kernel, and is recommended for use in production environments. The only major downside to this kernel is that it is based on Linux 2.6.18 -- some parts of the kernel are out-of-date, and it is not compatible with modern versions of udev. However, it is pretty trivial to downgrade udev to an earlier version on Funtoo Linux and this kernel has a track-record of being rock-solid. When stability is paramount, you put up with the udev downgrade, use this kernel, and can enjoy hundreds of days of uptime. For more information on how to use this kernel with Funtoo Linux, see the [[RHEL5 Kernel HOWTO]].
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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.
  
=== ubuntu-server --> {{Package|sys-kernel/ubuntu-server}} ===
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== Remote Build ==  
  
This is the kernel from Ubuntu Server. Version ''<code>2.6.32.32.62</code>'' is the same version used in Ubuntu Server 10.04 LTS, and version ''<code>2.6.35.28.50</code>'' is the one used in Ubuntu Server 10.10 (currently masked). In our testing of ''<code>2.6.32.32.62</code>'', it has been very reliable and offers very good performance. One exception, which is common among 2.6.32-based kernels, is that it's recommended that you emerge {{Package|net-misc/broadcom-netxtreme2}} if you have any Broadcom-based NICs, as the in-kernel drivers have compatibility issues with certain models. This kernel is a very good option if you want a relatively modern server kernel and do not need [[OpenVZ]] support. We use gcc-4.4.5 to build this kernel. It will use gcc-4.4.5 automatically, without requiring the user to use ''<code>gcc-config</code>''.
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[[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.
  
=== debian-sources --> {{Package|sys-kernel/debian-sources}} ===
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TODO: add caveats about what archs can be seeded and what can be not (maybe a table?)
  
This is the Debian kernel. '''These ebuilds now support the ''<code>binary</code>'' USE flag.''' Daniel has added a special <tt>config-extract</tt> command which can be used to list all available official Debian kernel configurations, and generate them from the Debian files included with the kernel. This kernel has optional [[OpenVZ]] support, but it is much better to use <tt>openvz-rhel6-stable</tt> if you want a production-quality OpenVZ installation. For more information about how to use <tt>debian-sources</tt> and <tt>config-extract</tt>, see [[#Using Debian-Sources with Genkernel|Using debian-sources with Genkernel]] below.
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== Tailored Build ==
  
=== debian-sources-lts --> {{Package|sys-kernel/debian-sources-lts}} ===
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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.
  
This is the Debian long-term stable kernel. '''These ebuilds now support the <tt>binary</tt> USE flag.''' Daniel has added a special <tt>config-extract</tt> command which can be used to list all available official Debian kernel configurations, and generate them from the Debian files included with the kernel.
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== Installing Metro ==
  
== Binary USE ==
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'''The recommended and supported method''' is to use the Git repository of [[Metro]]. 
  
Many of the kernel ebuilds in Funtoo Linux support the very useful <code>binary</code> USE flag. By enabling this USE flag and emerging the kernel, the ebuild will automatically build a binary kernel image, initramfs and kernel modules and install them to <code>/boot</code>. The binary kernel image and initramfs can be used to boot your Funtoo Linux system without requiring any additional configuration. This is a great way to get a Funtoo Linux system up and running quickly. Here's how to do it:
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Ensure that {{Package|dev-vcs/git}} and {{Package|dev-python/boto}} (optional; required for EC2 support) are installed on your system:
  
 
<console>
 
<console>
###i## echo "sys-kernel/openvz-rhel5-stable binary" >> /etc/portage/package.use
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# ##i##emerge dev-vcs/git
###i## emerge openvz-rhel5-stable
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# ##i##emerge dev-python/boto
###i## nano -w /etc/boot.conf
+
###i## boot-update
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</console>
 
</console>
  
More information can be found in the [[Funtoo Linux Installation]] Guide.
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Next, clone the master git repository as follows:
  
== Funtoo Linux Genkernel ==
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<console>
 +
# ##i##cd /root
 +
# ##i##git clone git://github.com/funtoo/metro.git
 +
# ##i##cp /root/metro/metro.conf ~/.metro
 +
</console>
  
Funtoo Linux contains a forked/enhanced version of genkernel with the following new capabilities:
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You will now have a directory called <tt>/root/metro</tt> that contains all the [[Metro]] source code.
  
* genkernel can use a build directory that is separate from the kernel source directory. This is enabled using the new <tt>--build-dst</tt> option.
+
Metro is now installed. It's time to customize it for your local system.
* <code>--build-src</code> is a new option that is equivalent to the <tt>--kerneldir</tt> option.
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* <code>--fullname</code> can be used to specify the entire name of the kernel and initramfs images -- everything after <tt>kernel-</tt> and <tt>initramfs-</tt>.
+
* <code>--firmware-src</code> - a new option that works identically to <tt>--firmware-dir</tt>.
+
* <code>--firmware-dst</code> - a new capability - you can now define where genkernel installs firmware.
+
* Genkernel uses Funtoo Linux <code>lvm2</code> rather than building its own.
+
* Some compile fixes.
+
  
== Kernel Features and Stability Overview ==
+
= Configuring Metro =
  
{{Fancywarning|'''SPARC64''': All kernels beyond 3.9 series and before 3.14-rc8 are subject to a [http://www.spinics.net/lists/sparclinux/msg11805.html bug] that stalls the kernel on sun4v machines '''only'''. Those latter are machines provided with UltraSPARC T1 and later CPUs (e.g. SunFire T1000, SunFire T2000, SunFire T52x0/T54x0 series...), all sun4u machines (UltraSPARC IV and prior CPUs) are not subject to this problem and any kernel version is functional. }}
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{{Note|Metro is not currently able to build Gentoo stages. See {{Bug|FL-901}}.}}
  
 +
[[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.
  
{| {{table}}
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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.
!Kernel Name
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!Version
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!USE flags
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!Stability
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!Extra Features
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!Req'd udev
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!Notes
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|-
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|<tt>{{Package|sys-kernel/vanilla-sources}}</tt>
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|3.13.1
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|N/A
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|'''Excellent''' - recommended for desktops and servers.
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|N/A
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|Any
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|Recommended for modern networking stack, hardware and [[Linux Containers]] support. This kernel must be manually configured by the user. New Features: [http://kernelnewbies.org/Linux_3.12 kernelnewbies.org/linux_3.12]  New Drivers: [http://kernelnewbies.org/Linux_3.12-DriversArch kernelnewbies/Linux_3.12-DriversArch]
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|-
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|<tt>{{Package|sys-kernel/gentoo-sources}}</tt>
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|3.13.1
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|N/A
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|'''Excellent''' - recommended for desktops and workstations
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|N/A
+
|Any
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|Recommended for modern networking stack, hardware and [[Linux Containers]] support. This kernel must be manually configured by the user. New Features: [http://kernelnewbies.org/Linux_3.12 kernelnewbies.org/linux_3.12]  New Drivers: [http://kernelnewbies.org/Linux_3.12-DriversArch kernelnewbies/Linux_3.12-DriversArch]
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|-
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|<tt>{{Package|sys-kernel/sysrescue-std-sources}}</tt>
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|3.0.21.302
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|<tt>binary</tt>
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|''Good'' - recommended for desktops
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|N/A
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|Any
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|Nvidia card users: binary use flag installs nouveau drivers. Not compatible with nvidia-drivers.
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|-
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|<tt>{{Package|sys-kernel/openvz-rhel6-stable}}</tt>
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|2.6.32.042.079.5
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|<tt>binary</tt>
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|'''Excellent''' - recommended for production servers
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|N/A
+
|Any
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|This kernel is built with gcc-4.4.5. <tt>emerge broadcom-netxtreme2</tt> for reliable BCM5709+ support (integrated NIC)
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|-
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|<tt>{{Package|sys-kernel/openvz-rhel5-stable}}</tt>
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|2.6.18.028.095.1
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|<tt>binary</tt>
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|'''Excellent''' - recommended for production servers
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|OpenVZ
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|=sys-fs/udev-146*
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|Broadcom <tt>bnx2</tt> driver module bundled with kernel appears to be OK. This kernel is built with gcc-4.1.2. Enabling the <tt>binary</tt> USE flag will cause gcc-4.1.2 to be emerged and used for building the kernel.
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|-
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|<tt>{{Package|sys-kernel/ubuntu-server}}</tt>
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|2.6.32.32.62
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|<tt>binary</tt>
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|'''Excellent''' - recommended for production servers (still in extended testing)
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| N/A
+
|Any
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|This kernel is built with gcc-4.4.5. <tt>emerge broadcom-netxtreme2</tt> for reliable BCM5709+ support (integrated NIC)
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|-
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|<tt>{{Package|sys-kernel/ubuntu-server}}</tt>
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|2.6.35.28.50
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|<tt>binary</tt>
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|''not yet tested''
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| N/A
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|Any
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|This kernel is built with gcc-4.4.5. <tt>emerge broadcom-netxtreme2</tt> for reliable BCM5709+ support (integrated NIC)
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|-
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|<tt>{{Package|sys-kernel/debian-sources}}</tt>
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|3.12.3
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|<tt>openvz</tt>
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|''Good'' - default kernel recommended by Funtoo
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|OpenVZ (optional)
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|Any
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|See [[#Using debian-sources with Genkernel]], below.
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|-
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|}
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== Using Debian-Sources with Genkernel ==
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{{file|name=.metro|desc=Metro configuration|body=
 +
# Main metro configuration file - these settings need to be tailored to your install:
  
{{ fancyimportant|Debian-sources is now fully compatible with the ''binary'' USE flag and recommended for desktop users. The below example is valid for manual installation. At least 12G of ''/var/tmp'' required to build }}
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[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]
  
This section describes how to build a binary kernel with ''<code>debian-sources</code>'' and ''<code>genkernel</code>'', and it also explains how to use Funtoo Linux's ''<code>config-extract</code>'' tool to list and create official Debian kernel configurations.
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: /home/mirror/funtoo
 +
owner: root
 +
group: repomgr
 +
dirmode: 775
  
=== First step: emerging the required packages ===
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[section portage]
  
The first step is to emerge:
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MAKEOPTS: auto
  
# The Debian sources
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[section emerge]
# Genkernel itself
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This is achieved by running the following:
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options: --jobs=4 --load-average=4 --keep-going=n
  
<console>
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# This line should not be modified:
###i## emerge -av sys-kernel/debian-sources sys-kernel/genkernel
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[collect $[path/install]/etc/master.conf]
</console>
+
}}
 +
 
 +
== Arch and Subarch ==
  
Once the Debian kernel sources are deployed, you should find a directory named '''linux-debian-''version''''' (e.g. linux-debian-2.6.32.30) under '''<code>/usr/src</code>'''. Update your the '''<code>linux</code>''' symlink to point on this directory:
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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:
 
<console>
 
<console>
###i## cd /usr/src
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###i## ls /root/metro/subarch
###i## rm linux
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# ls subarch/
###i## ln -s linux-debian-2.6.32.30 linux
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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
 
</console>
 
</console>
  
Alternatively, emerge the debian-sources with the ''<code>symlink</code>'' USE flag.
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= First stages build (local build) =
  
=== Second step: Grabbing a configuration file ===
+
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 &quot;control&quot; files in <tt>/home/mirror/funtoo</tt>, which will allow [[Metro]] to understand how it is supposed to proceed.
  
If is now time to download the kernel configuration file. For this tutorial we will use a configuration file for AMD64 (several others architectures like MIPS or SPARC64 are available.) To view a complete list of available kernel configurations, type <code>./config-extract -l</code> '''in the Debian kernel source directory''':
+
== Step 1: Set up pentium4 repository (local build) ==
  
<pre>
+
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:
ninja1 linux-debian-2.6.32.30 # ./config-extract -l
+
  
====== standard featureset ======
+
<console>
 +
# ##i##install -d /home/mirror/funtoo/funtoo-current/x86-32bit/pentium4
 +
# ##i##install -d /home/mirror/funtoo/funtoo-current/snapshots
 +
# ##i##cd /home/metro/mirror/funtoo/funtoo-current/x86-32bit/pentium4
 +
# ##i##install -d 2011-12-13
 +
# ##i##cd 2011-12-13
 +
# ##i##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
 +
# ##i##cd ..
 +
# ##i##install -d .control/version
 +
# ##i##echo "2011-12-13" > .control/version/stage3
 +
# ##i##install -d .control/strategy
 +
# ##i##echo local >  .control/strategy/build
 +
# ##i##echo stage3 > .control/strategy/seed
 +
</console>
  
      alpha: alpha-generic, alpha-legacy, alpha-smp
+
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.
      amd64
+
      armel: iop32x, ixp4xx, kirkwood, orion5x, versatile
+
        hppa: parisc, parisc-smp, parisc64, parisc64-smp
+
        i386: 486, 686, 686-bigmem, amd64
+
        ia64: itanium, mckinley
+
        m68k: amiga, atari, bvme6000, mac, mvme147, mvme16x
+
        mips: 4kc-malta, 5kc-malta, r4k-ip22, r5k-ip32, sb1-bcm91250a, sb1a-bcm91480b
+
      mipsel: 4kc-malta, 5kc-malta, r5k-cobalt, sb1-bcm91250a, sb1a-bcm91480b
+
    powerpc: powerpc, powerpc-smp, powerpc64
+
        s390: s390x, s390x-tape
+
        sh4: sh7751r, sh7785lcr
+
      sparc: sparc64, sparc64-smp
+
    sparc64: sparc64, sparc64-smp
+
  
====== vserver featureset ======
+
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.
  
      amd64
+
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.
        i386: 686, 686-bigmem
+
        ia64: itanium, mckinley
+
    powerpc: powerpc, powerpc64
+
        s390
+
      sparc
+
    sparc64
+
  
====== xen featureset ======
+
== Step 2: Building the pentium4 stages ==
  
      amd64
+
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:
        i386
+
  
====== openvz featureset ======
+
<console>
 +
# ##i##cd /root/metro
 +
# ##i##scripts/ezbuild.sh funtoo-current pentium4
 +
</console>
  
      amd64
+
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.
        i386
+
</pre>
+
  
Type <tt>config-extract -h</tt> for extended usage information:
+
= Building for another binary compatible architecture (remote build) =
  
<pre>
+
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).  
ninja1 linux-debian-2.6.32.30 # ./config-extract -h
+
This work is free software.
+
  
Copyright 2011 Funtoo Technologies. You can redistribute and/or modify it under
+
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).  
the terms of the GNU General Public License version 3 as published by the Free
+
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.
Software Foundation. Alternatively you may (at your option) use any other
+
license that has been publicly approved for use with this program by Funtoo
+
Technologies (or its successors, if any.)
+
  
usage: config-extract [options] arch [featureset] [subarch]
+
{{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.}}
  
  -h  --help        print this usage and exit
+
== Step 1: Set up Core_2 32bit repository ==
  -l  --list        list all available kernel configurations
+
  -o  --outfile    specify kernel config outfile --
+
                    defaults to .config in current directory
+
  [featureset]      defaults to "none" if not specified
+
  [subarch]        defaults to the only one available; otherwise required
+
  
This program was written by Daniel Robbins for Funtoo Linux, for the purpose of
+
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:
easily and conveniently extracting Debian kernel configurations. To see a nice
+
list of all available kernel configurations, use the --list option.
+
  
Debian's kernel configs are specified internally in arch_featureset_flavor
+
<console>
format, such as: "amd64_openvz_amd64". The featureset typically describes an
+
# ##i## cd /home/mirror/funtoo/funtoo-current/x86-32bit
optional kernel configuration such as "xen" or "openvz", while the flavor in
+
# ##i##install -d core2_32
Debian terminology typically refers to the sub-architecture of the CPU.
+
# ##i##cd core2_32
 +
# ##i##install -d .control/strategy
 +
# ##i##echo remote > .control/strategy/build
 +
# ##i##echo stage3 > .control/strategy/seed
 +
# ##i##install -d .control/remote
 +
# ##i##echo funtoo-current > .control/remote/build
 +
# ##i##echo x86-32bit > .control/remote/arch_desc
 +
# ##i##echo pentium4 > .control/remote/subarch
 +
</console>
  
When using this command, you must specify an arch. A featureset of "none" is
+
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.
assumed unless you specify one, and by default this program will pick the only
+
available subarch if there is only one to choose from. If not, you will need to
+
pick one (and the program will remind you to do this.)
+
  
The kernel configuration will be written to ".config" in the current directory,
+
{{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.}}
or the location you specified using the -o/--outfile option.
+
</pre>
+
  
Let's use <tt>config-extract</tt> to create a kernel configuration for an amd64 system:
+
== 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>
# ##i##cd linux
+
# ##i##/root/metro/scripts/ezbuild.sh funtoo-current core2_32
# ##i##./config-extract amd64
+
Wrote amd64_none_amd64 kernel configuration to /usr/src/linux-debian-2.6.32.30/.config.
+
 
</console>
 
</console>
  
<tt>config-extract</tt> also allows you to extract special Debian featuresets, such as settings for Xen and [[OpenVZ]] kernels:
+
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.
  
<console>
+
== Step 3: The Next Build ==
# ##i##./config-extract amd64 openvz
+
Wrote amd64_openvz_amd64 kernel configuration to /usr/src/linux-debian-2.6.32.30/.config.
+
</console>
+
  
'''It is necessary to name the kernel configuration file something other than ".config" to avoid errors with genkernel.'''
+
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 =
  
After using <tt>config-extract</tt>, run <tt>make oldconfig</tt> and accept all default options by hitting Enter at all prompts.
+
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=
 +
[collect ../../fslayouts/funtoo/layout.conf]
  
 +
[section release]
  
{{fancynote|if you are using the XFS file system as your root partition: Run <tt>make menuconfig</tt> and ensure that "File Systems --> XFS filesystem support" and "Library Routines --> CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" are both set to * (and not [m]).}}
+
author: Daniel Robbins <drobbins@funtoo.org>
This is needed to ensure that your system can boot up correctly for kernel versions >= 3.10.11.
+
  
=== Third step: Building and installing the kernel ===
+
[section target]
  
This is simply achieved by:
+
compression: xz
  
<console>
+
[section portage]
# ##i##genkernel --kernel-config=config-2.6.32-5-amd64 all
+
</console>
+
  
* --kernel-config: use the given configfile. If you only give a filename here, it is searched for in your current working dir. You can also use a relative or an absolute path leading to your configfile here (for example: "--kernel-config=/usr/src/linux/configfile").
+
FEATURES:  
* all: rebuild the kernel image and the initramfs ramdisk image (aside of kernel modules, the ramdisk image contains tools such as BusyBox and some generic startup scripts, depending on options you use on the command line several additional tools like lvm or raid volume management can be incorporated as well).
+
SYNC: $[snapshot/source/remote]
 +
USE:
  
{{ fancyimportant|Unless explicitly stated via ''--no-clean'' or ''--no-mrproper'', Genkernel will do a '''make mrproper''' in the kernel source tree, thus cleaning a previous build '''and removing the previous kernel configuration file''' in it.
+
[section profile]
}}
+
  
If you use Genkernel to rebuild a Linux kernel on SPARC64, remember to either:
+
format: new
* Set '''sparc64-unknown-linux-gnu-''' in ''General setup --> Cross-compiler tool prefix''
+
path: gentoo:funtoo/1.0/linux-gnu
* Put '''--kernel-cross-compile=sparc64-unknown-linux-gnu-''' on the Genkernel command line
+
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]]
 +
}}
  
Once the kernel has been compiled and the ram disk has been generated, the kernel image plus its companion files (initramfs image and System.map) are placed in the /boot directory. You can use your favourite tool to update your bootloader configuration files.
+
= Building Gentoo stages =
  
[[Category:Internals]]
+
[[Category:HOWTO]]
[[Category:Funtoo features]]
+
[[Category:Metro]]
[[Category:Kernel]]
+
[[Category:Official Documentation]]
+

Revision as of 18:53, February 20, 2015

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.

These other Metro documents are also available:

{{#ask: |format=ul }}

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.

Important

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 Package:Git and No results (optional; required for EC2 support) are installed on your system:

# emerge dev-vcs/git
# emerge dev-python/boto

Next, clone the master git repository as follows:

# cd /root
# git clone git://github.com/funtoo/metro.git
# 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

Note

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:

# ls /root/metro/subarch
# 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:

# install -d /home/mirror/funtoo/funtoo-current/x86-32bit/pentium4
# install -d /home/mirror/funtoo/funtoo-current/snapshots
# cd /home/metro/mirror/funtoo/funtoo-current/x86-32bit/pentium4
# install -d 2011-12-13
# cd 2011-12-13
# 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
# cd ..
# install -d .control/version
# echo "2011-12-13" > .control/version/stage3
# install -d .control/strategy
# echo local >  .control/strategy/build
# 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:

# cd /root/metro
# 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.

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:

#  cd /home/mirror/funtoo/funtoo-current/x86-32bit
# install -d core2_32
# cd core2_32
# install -d .control/strategy
# echo remote > .control/strategy/build
# echo stage3 > .control/strategy/seed
# install -d .control/remote
# echo funtoo-current > .control/remote/build
# echo x86-32bit > .control/remote/arch_desc
# 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.

Note

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/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