mirror of
https://github.com/Zeckmathederg/glfs.git
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06908bf6d5
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@21946 af4574ff-66df-0310-9fd7-8a98e5e911e0
422 lines
14 KiB
XML
422 lines
14 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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<!ENTITY lvm2-download-http "https://sourceware.org/ftp/lvm2/LVM2.&lvm2-version;.tgz">
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<!ENTITY lvm2-download-ftp "ftp://sourceware.org/pub/lvm2/LVM2.&lvm2-version;.tgz">
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<!ENTITY lvm2-md5sum "22e4a9e66b94bbfcf81444472ed32a2d">
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<!ENTITY lvm2-size "2.3 MB">
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<!ENTITY lvm2-buildsize "41 MB (add at least 594 MB for tests in the /tmp directory; additionally transient files can grow up to around 500 MB)">
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<!-- My build size was 124 MB with tests, but I'll leave this here. -renodr -->
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<!ENTITY lvm2-time "0.2 SBU (using parallelism=4; add 15 SBU for tests)">
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]>
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<sect1 id="lvm2" xreflabel="LVM2-&lvm2-version;">
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<?dbhtml filename="lvm2.html"?>
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<sect1info>
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<othername>$LastChangedBy$</othername>
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<date>$Date$</date>
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</sect1info>
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<title>LVM2-&lvm2-version;</title>
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<indexterm zone="lvm2">
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<primary sortas="a-LVM2">LVM2</primary>
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</indexterm>
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<sect2 role="package">
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<title>Introduction to LVM2</title>
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<para>
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The <application>LVM2</application> package is a set of tools that manage
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logical partitions. It allows spanning of file systems across multiple
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physical disks and disk partitions and provides for dynamic growing or
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shrinking of logical partitions, mirroring and low storage footprint
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snapshots.
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</para>
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&lfs84_checked;
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<bridgehead renderas="sect3">Package Information</bridgehead>
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<itemizedlist spacing="compact">
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<listitem>
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<para>
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Download (HTTP): <ulink url="&lvm2-download-http;"/>
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</para>
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</listitem>
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<listitem>
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<para>
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Download (FTP): <ulink url="&lvm2-download-ftp;"/>
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</para>
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</listitem>
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<listitem>
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<para>
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Download MD5 sum: &lvm2-md5sum;
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</para>
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</listitem>
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<listitem>
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<para>
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Download size: &lvm2-size;
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</para>
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</listitem>
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<listitem>
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<para>
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Estimated disk space required: &lvm2-buildsize;
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</para>
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</listitem>
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<listitem>
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<para>
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Estimated build time: &lvm2-time;
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</para>
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</listitem>
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</itemizedlist>
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<bridgehead renderas="sect3">LVM2 Dependencies</bridgehead>
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<bridgehead renderas="sect4">Required</bridgehead>
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<para role="required">
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<xref linkend='libaio'/>
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</para>
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<bridgehead renderas="sect4">Optional</bridgehead>
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<para role="optional">
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<xref linkend='mdadm'/>,
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<xref linkend='reiserfs'/>,
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<xref linkend='valgrind'/>,
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<xref linkend='which'/>,
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<xref linkend='xfsprogs'/> (all five may be used, but are not required,
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for tests), and
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<ulink url='https://github.com/jthornber/thin-provisioning-tools'>
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thin-provisioning-tools</ulink>
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</para>
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<para condition="html" role="usernotes">User Notes:
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<ulink url="&blfs-wiki;/lvm2"/>
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</para>
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</sect2>
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<sect2 role="kernel" id="lvm2-kernel">
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<title>Kernel Configuration</title>
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<para>
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Enable the following options in the kernel configuration
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and recompile the kernel:
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</para>
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<note><para>
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There are several other Device Mapper options in the kernel beyond those
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listed below. In order to get reasonable results if running the
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regression tests, all must be enabled either internally or as a module.
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The tests will all time out if Magic SysRq key is not enabled.
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</para></note>
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<screen><literal>Device Drivers --->
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[*] Multiple devices driver support (RAID and LVM) ---> [CONFIG_MD]
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<*/M> Device mapper support [CONFIG_BLK_DEV_DM]
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<*/M/ > Crypt target support [CONFIG_DM_CRYPT]
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<*/M/ > Snapshot target [CONFIG_DM_SNAPSHOT]
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<*/M/ > Thin provisioning target [CONFIG_DM_THIN_PROVISIONING]
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<*/M/ > Mirror target [CONFIG_DM_MIRROR]
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Kernel hacking --->
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[*] Magic SysRq key [CONFIG_MAGIC_SYSRQ]</literal></screen>
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<indexterm zone="lvm2 lvm2-kernel">
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<primary sortas="d-lvm2">lvm2</primary>
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</indexterm>
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</sect2>
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<sect2 role="installation">
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<title>Installation of LVM2</title>
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<para>
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Install <application>LVM2</application> by running the following
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commands:
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</para>
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<screen><userinput>SAVEPATH=$PATH &&
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PATH=$PATH:/sbin:/usr/sbin &&
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./configure --prefix=/usr \
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--exec-prefix= \
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--enable-cmdlib \
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--enable-pkgconfig \
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--enable-udev_sync &&
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make &&
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PATH=$SAVEPATH &&
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unset SAVEPATH</userinput></screen>
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<para>
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The tests use <application>udev</application> for logical volume
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synchronization, so the LVM udev rules and some utilities need to
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be installed before running the tests. If you are installing
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<application>LVM2</application> for the first time, and do not
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want to install the full package before running the tests, the minimal
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set of utilities can be installed by running the following instructions
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as the <systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"
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remap="test"><userinput>make -C tools install_tools_dynamic &&
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make -C udev install &&
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make -C libdm install</userinput></screen>
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<para>
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To test the results, issue, as the
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<systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"
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remap="test"><userinput>make check_local</userinput></screen>
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<para>
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Other targets are available and can be listed with
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<command>make -C test help</command>. The test timings are very dependent
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on the speed of the disk(s), and on the number of enabled kernel options.
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</para>
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<!-- Results for LVM2.2.02.176:
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### 292 tests: 177 passed, 46 skipped, 0 timed out, 60 warned, 9 failed
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Results for LVM2.2.03.01:
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### 302 tests: 182 passed, 43 skipped, 0 timed out, 62 warned, 15 failed
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Results for LVM2.2.03.05:
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### 326 tests: 255 passed, 58 skipped, 0 timed out, 2 warned, 11 failed
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-->
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<para>
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The tests do not implement the <quote>expected fail</quote> possibility,
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and a small number of test failures is expected by upstream. More
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failures may happen because some kernel options are missing. For example,
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the lack of the <emphasis>dm-delay</emphasis> device mapper target may
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explain some failures. Some tests are flagged
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<quote>warned</quote> if
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<ulink url='https://github.com/jthornber/thin-provisioning-tools'>
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thin-provisioning-tools</ulink> are not installed. A workaround is to
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add the following flags to <command>configure</command>:
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</para>
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<screen role="nodump"><userinput> --with-thin-check= \
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--with-thin-dump= \
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--with-thin-repair= \
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--with-thin-restore= \
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--with-cache-check= \
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--with-cache-dump= \
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--with-cache-repair= \
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--with-cache-restore= \</userinput></screen>
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<para>
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Some tests may hang. They can be removed if necessary, for example:
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<command>rm test/shell/lvconvert-raid-reshape.sh</command>. The tests
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generate a lot of kernel messages, which may clutter your terminal. You
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can disable them by issuing <command>dmesg -D</command> before running
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the tests (do not forget to issue <command>dmesg -E</command> when tests
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are done).
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<note><simpara>The checks create device nodes in the /tmp directory. The
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tests will fail if /tmp is mounted with the nodev
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option.</simpara></note>
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</para>
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<para>
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Now, as the <systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"><userinput>make install</userinput></screen>
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</sect2>
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<sect2 role="commands">
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<title>Command Explanations</title>
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<para>
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<command>PATH=$PATH:/sbin:/usr/sbin</command>: The path
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must contain <filename class="directory">/sbin</filename> and
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<filename class='directory'>/usr/sbin</filename> for proper system tool
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detection by the <command>configure</command> script. This instruction
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ensures that PATH is properly set even if you build as an unprivileged user.
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</para>
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<para>
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<parameter>--enable-cmdlib</parameter>: This switch enables
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building of the shared command library. It is required
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when building the event daemon.
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</para>
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<para>
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<parameter>--enable-pkgconfig</parameter>: This switch enables
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installation of <command>pkg-config</command> support files.
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</para>
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<para>
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<parameter>--enable-udev_sync</parameter>: This switch enables
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synchronisation with <application>Udev</application> processing.
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</para>
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<para>
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<option>--enable-dmeventd</option>: This switch enables
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building of the <application>Device Mapper</application>
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event daemon.
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</para>
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</sect2>
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<sect2 role="content">
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<title>Contents</title>
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<segmentedlist>
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<segtitle>Installed Programs</segtitle>
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<segtitle>Installed Libraries</segtitle>
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<segtitle>Installed Directories</segtitle>
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<seglistitem>
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<seg>
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blkdeactivate, dmeventd (optional), dmsetup, fsadm, lvm, and lvmdump.
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There are also numerous symbolic links to lvm that implement specific
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functionalities
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</seg>
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<seg>
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libdevmapper.so and liblvm2cmd.so; optional:
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libdevmapper-event.so, libdevmapper-event-lvm2.so,
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libdevmapper-event-lvm2mirror.so, libdevmapper-event-lvm2snapshot.so,
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libdevmapper-event-lvm2raid.so, and libdevmapper-event-lvm2thin.so
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</seg>
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<seg>
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/etc/lvm and
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/lib/device-mapper (optional)
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</seg>
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</seglistitem>
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</segmentedlist>
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<variablelist>
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<bridgehead renderas="sect3">Short Descriptions</bridgehead>
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<?dbfo list-presentation="list"?>
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<?dbhtml list-presentation="table"?>
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<varlistentry id="blkdeactivate">
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<term><command>blkdeactivate</command></term>
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<listitem>
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<para>
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is a utility to deactivate block devices.
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</para>
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<indexterm zone="lvm2 blkdeactivate">
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<primary sortas="b-blkdeactivate">blkdeactivate</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="dmeventd">
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<term><command>dmeventd</command></term>
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<listitem>
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<para>
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(optional) is the Device Mapper event daemon.
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</para>
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<indexterm zone="lvm2 dmeventd">
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<primary sortas="b-dmeventd">dmeventd</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="dmsetup">
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<term><command>dmsetup</command></term>
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<listitem>
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<para>
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is a low level logical volume management tool.
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</para>
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<indexterm zone="lvm2 dmsetup">
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<primary sortas="b-dmsetup">dmsetup</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="fsadm">
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<term><command>fsadm</command></term>
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<listitem>
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<para>
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is a utility used to resize or check filesystem on a device.
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</para>
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<indexterm zone="lvm2 fsadm">
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<primary sortas="b-fsadm">fsadm</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="lvm">
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<term><command>lvm</command></term>
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<listitem>
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<para>
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provides the command-line tools for <application>LVM2</application>.
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Commands are implemented via sympolic links to this program to
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manage physical devices (pv*), volume groups (vg*) and logical
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volumes (lv*).
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</para>
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<indexterm zone="lvm2 lvm">
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<primary sortas="b-lvm">lvm</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<!--
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<varlistentry id="lvmconf">
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<term><command>lvmconf</command></term>
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<listitem>
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<para>
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is a script that modifies the locking configuration in
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the <application>LVM2</application> configuration file.
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</para>
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<indexterm zone="lvm2 lvmconf">
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<primary sortas="b-lvmconf">lvmconf</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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-->
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<varlistentry id="lvmdump">
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<term><command>lvmdump</command></term>
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<listitem>
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<para>
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is a tool used to dump various information concerning
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<application>LVM2</application>.
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</para>
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<indexterm zone="lvm2 lvmdump">
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<primary sortas="b-lvmdump">lvmdump</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="vgimportclone">
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<term><command>vgimportclone</command></term>
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<listitem>
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<para>
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is used to import a duplicated VG (e.g. hardware snapshot).
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</para>
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<indexterm zone="lvm2 vgimportclone">
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<primary sortas="b-vgimportclone">vgimportclone</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libdevmapper">
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<term><filename class='libraryfile'>libdevmapper.so</filename></term>
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<listitem>
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<para>
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contains the <application>Device Mapper</application> API
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functions.
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</para>
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<indexterm zone="lvm2 libdevmapper">
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<primary sortas="c-libdevmapper">libdevmapper.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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</variablelist>
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</sect2>
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</sect1>
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