[8bc3edae] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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[0dc5c2e1] | 7 | <!ENTITY lvm2-download-http "https://sourceware.org/ftp/lvm2/LVM2.&lvm2-version;.tgz">
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[e65320b] | 8 | <!ENTITY lvm2-download-ftp "ftp://sourceware.org/pub/lvm2/LVM2.&lvm2-version;.tgz">
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[e5e327a] | 9 | <!ENTITY lvm2-md5sum "a97cf533222a5760225dbd26c3982ca6">
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[213d18c] | 10 | <!ENTITY lvm2-size "2.6 MB">
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[e5e327a] | 11 | <!ENTITY lvm2-buildsize "38 MB (add 20 MB for tests; transient files can grow up to around 300 MB in the /tmp directory during tests)">
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[8ec0245] | 12 | <!-- My build size was 124 MB with tests, but I'll leave this here. -renodr
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[0936f56] | 13 | The files in /tmp are transient. I monitor /tmp with a loop during
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[e5e327a] | 14 | tests. -pierre, August 2020
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| 15 |
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| 16 | Build size with tests was 58M. The largest size of /tmp I saw was 289MB.
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| 17 | ### 412 tests: 245 passed, 155 skipped, 0 timed out, 1 warned, 11 failed
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| 18 | Aug 2023 LVM2.2.03.22 - bdubbs
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| 19 | -->
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[ad95d18] | 20 | <!ENTITY lvm2-time "0.1 SBU (using parallelism=4; add 9 to 48 SBU for tests, depending on disk speed and whether ram block device is enabled in the kernel)">
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[8bc3edae] | 21 | ]>
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| 22 |
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[c627795] | 23 | <sect1 id="lvm2" xreflabel="LVM2-&lvm2-version;">
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[8bc3edae] | 24 | <?dbhtml filename="lvm2.html"?>
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| 25 |
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| 26 |
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[c627795] | 27 | <title>LVM2-&lvm2-version;</title>
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[8bc3edae] | 28 |
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| 29 | <indexterm zone="lvm2">
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[c627795] | 30 | <primary sortas="a-LVM2">LVM2</primary>
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[8bc3edae] | 31 | </indexterm>
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| 32 |
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| 33 | <sect2 role="package">
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[c627795] | 34 | <title>Introduction to LVM2</title>
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[8bc3edae] | 35 |
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[c627795] | 36 | <para>
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[99fcc47] | 37 | The <application>LVM2</application> package is a set of tools that manage
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[c627795] | 38 | logical partitions. It allows spanning of file systems across multiple
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| 39 | physical disks and disk partitions and provides for dynamic growing or
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[99fcc47] | 40 | shrinking of logical partitions, mirroring and low storage footprint
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| 41 | snapshots.
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[c627795] | 42 | </para>
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[8bc3edae] | 43 |
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[2314cd7] | 44 | &lfs120_checked;
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[8bc3edae] | 45 |
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| 46 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 47 | <itemizedlist spacing="compact">
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[f60cf4a] | 48 | <listitem>
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[c627795] | 49 | <para>
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| 50 | Download (HTTP): <ulink url="&lvm2-download-http;"/>
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| 51 | </para>
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[f60cf4a] | 52 | </listitem>
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[8bc3edae] | 53 | <listitem>
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[c627795] | 54 | <para>
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| 55 | Download (FTP): <ulink url="&lvm2-download-ftp;"/>
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| 56 | </para>
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[8bc3edae] | 57 | </listitem>
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| 58 | <listitem>
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[c627795] | 59 | <para>
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| 60 | Download MD5 sum: &lvm2-md5sum;
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| 61 | </para>
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[8bc3edae] | 62 | </listitem>
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| 63 | <listitem>
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[c627795] | 64 | <para>
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| 65 | Download size: &lvm2-size;
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| 66 | </para>
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[8bc3edae] | 67 | </listitem>
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| 68 | <listitem>
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[c627795] | 69 | <para>
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| 70 | Estimated disk space required: &lvm2-buildsize;
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| 71 | </para>
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[8bc3edae] | 72 | </listitem>
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| 73 | <listitem>
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[c627795] | 74 | <para>
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| 75 | Estimated build time: &lvm2-time;
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| 76 | </para>
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[8bc3edae] | 77 | </listitem>
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| 78 | </itemizedlist>
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| 79 |
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[b5e8375] | 80 | <bridgehead renderas="sect3">LVM2 Dependencies</bridgehead>
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| 81 |
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[3964f59] | 82 | <bridgehead renderas="sect4">Required</bridgehead>
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| 83 | <para role="required">
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[8991a7cb] | 84 | <xref linkend='libaio'/>
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[3964f59] | 85 | </para>
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| 86 |
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[b5e8375] | 87 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 88 | <para role="optional">
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[99fcc47] | 89 | <xref linkend='mdadm'/>,
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| 90 | <xref linkend='reiserfs'/>,
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| 91 | <xref linkend='valgrind'/>,
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| 92 | <xref linkend='which'/>,
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| 93 | <xref linkend='xfsprogs'/> (all five may be used, but are not required,
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[d5f6e8e] | 94 | for tests),
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[99fcc47] | 95 | <ulink url='https://github.com/jthornber/thin-provisioning-tools'>
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[d5f6e8e] | 96 | thin-provisioning-tools</ulink>, and
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| 97 | <ulink url="https://github.com/dm-vdo/vdo">vdo</ulink>
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[b5e8375] | 98 | </para>
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| 99 |
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[09765cf] | 100 |
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[8bc3edae] | 101 | </sect2>
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| 102 |
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[c627795] | 103 | <sect2 role="kernel" id="lvm2-kernel">
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[7e1df8f9] | 104 | <title>Kernel Configuration</title>
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| 105 |
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[c627795] | 106 | <para>
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[421128a1] | 107 | Enable the following options in the kernel configuration
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[c627795] | 108 | and recompile the kernel:
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| 109 | </para>
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[7e1df8f9] | 110 |
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[b5e8375] | 111 | <note><para>
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| 112 | There are several other Device Mapper options in the kernel beyond those
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| 113 | listed below. In order to get reasonable results if running the
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| 114 | regression tests, all must be enabled either internally or as a module.
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[302a619] | 115 | The tests will all time out if Magic SysRq key is not enabled.
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[b5e8375] | 116 | </para></note>
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| 117 |
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[d67d543] | 118 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 119 | href="lvm2-kernel.xml"/>
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[7e1df8f9] | 120 |
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| 121 | <indexterm zone="lvm2 lvm2-kernel">
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| 122 | <primary sortas="d-lvm2">lvm2</primary>
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| 123 | </indexterm>
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| 124 |
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| 125 | </sect2>
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| 126 |
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[8bc3edae] | 127 | <sect2 role="installation">
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[c627795] | 128 | <title>Installation of LVM2</title>
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[8bc3edae] | 129 |
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[c627795] | 130 | <para>
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| 131 | Install <application>LVM2</application> by running the following
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| 132 | commands:
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| 133 | </para>
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[8bc3edae] | 134 |
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[22e249a] | 135 | <screen><userinput>PATH+=:/usr/sbin \
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[e94d178] | 136 | ./configure --prefix=/usr \
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[4591404] | 137 | --enable-cmdlib \
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| 138 | --enable-pkgconfig \
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[46a9711b] | 139 | --enable-udev_sync &&
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[c470ab9] | 140 | make</userinput></screen>
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[8bc3edae] | 141 |
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[c627795] | 142 | <para>
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[99fcc47] | 143 | The tests use <application>udev</application> for logical volume
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[8991a7cb] | 144 | synchronization, so the LVM udev rules and some utilities need to
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[99fcc47] | 145 | be installed before running the tests. If you are installing
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| 146 | <application>LVM2</application> for the first time, and do not
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| 147 | want to install the full package before running the tests, the minimal
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| 148 | set of utilities can be installed by running the following instructions
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| 149 | as the <systemitem class="username">root</systemitem> user:
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| 150 | </para>
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| 151 |
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[06908bf6] | 152 | <screen role="root"
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| 153 | remap="test"><userinput>make -C tools install_tools_dynamic &&
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[1ba8e5ee] | 154 | make -C udev install &&
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[99fcc47] | 155 | make -C libdm install</userinput></screen>
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| 156 |
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| 157 | <para>
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[06908bf6] | 158 | To test the results, issue, as the
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| 159 | <systemitem class="username">root</systemitem> user:
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| 160 | </para>
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| 161 |
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| 162 | <screen role="root"
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[213d18c] | 163 | remap="test"><userinput>LC_ALL=en_US.UTF-8 make check_local</userinput></screen>
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[06908bf6] | 164 |
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| 165 | <para>
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[213d18c] | 166 | Some tests may hang. In this case they can be skipped by adding
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| 167 | <command>S=<testname></command> to the <command>make</command>
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| 168 | command.
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[06908bf6] | 169 | Other targets are available and can be listed with
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| 170 | <command>make -C test help</command>. The test timings are very dependent
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| 171 | on the speed of the disk(s), and on the number of enabled kernel options.
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[f9431b6] | 172 | </para>
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[20c731a] | 173 |
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[6c6f393] | 174 | <!-- Results for LVM2.2.02.176:
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| 175 | ### 292 tests: 177 passed, 46 skipped, 0 timed out, 60 warned, 9 failed
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[5d01724] | 176 |
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| 177 | Results for LVM2.2.03.01:
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| 178 | ### 302 tests: 182 passed, 43 skipped, 0 timed out, 62 warned, 15 failed
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[23ed085] | 179 |
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| 180 | Results for LVM2.2.03.05:
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| 181 | ### 326 tests: 255 passed, 58 skipped, 0 timed out, 2 warned, 11 failed
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[1c6b54be] | 182 |
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| 183 | Results for LVM2.2.03.09:
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| 184 | ### 338 tests: 212 passed, 41 skipped, 0 timed out, 70 warned, 15 failed
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[d5f6e8e] | 185 |
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| 186 | Results for LVM2.2.03.11:
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| 187 | ### 357 tests: 231 passed, 32 skipped, 0 timed out, 77 warned, 17 failed
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[51ba03e] | 188 |
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| 189 | Results for LVM2.2.03.14:
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| 190 | ### 389 tests: 304 passed, 73 skipped, 0 timed out, 2 warned, 10 failed
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[f9478ee] | 191 |
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| 192 | Results for LVM2.2.03.16:
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| 193 | ### 395 tests: 241 passed, 145 skipped, 0 timed out, 1 warned, 8 failed
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[213d18c] | 194 |
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| 195 | Results for LVM2.2.03.17:
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| 196 | ### 403 tests: 333 passed, 61 skipped, 0 timed out, 3 warned, 6 failed
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[187200ac] | 197 |
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| 198 | Results for LVM2.2.03.20 [pierre]:
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| 199 | ### 407 tests: 324 passed, 75 skipped, 0 timed out, 3 warned, 5 failed
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[20c731a] | 200 | -->
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| 201 |
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[f9431b6] | 202 | <para>
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[af8a78d] | 203 | The tests do not implement the <quote>expected fail</quote> possibility,
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[8558044] | 204 | and a small number of test failures is expected by upstream.
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| 205 | <!-- 1 -->More failures may happen because some kernel options are missing.
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| 206 | For example, the lack of the <emphasis>dm-delay</emphasis> device
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| 207 | mapper target explains some failures.
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| 208 | <!-- 2 -->Some tests may fail if there is insufficient free space available
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| 209 | in the partition with the /tmp directory. At least one test fails if 16 TB
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[e43a4270] | 210 | is not available.
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| 211 | <!-- 3 -->Some tests are flagged <quote>warned</quote> if
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[f9431b6] | 212 | <ulink url='https://github.com/jthornber/thin-provisioning-tools'>
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| 213 | thin-provisioning-tools</ulink> are not installed. A workaround is to
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| 214 | add the following flags to <command>configure</command>:
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| 215 | </para>
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| 216 |
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| 217 | <screen role="nodump"><userinput> --with-thin-check= \
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| 218 | --with-thin-dump= \
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| 219 | --with-thin-repair= \
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| 220 | --with-thin-restore= \
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| 221 | --with-cache-check= \
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| 222 | --with-cache-dump= \
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| 223 | --with-cache-repair= \
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| 224 | --with-cache-restore= \</userinput></screen>
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| 225 |
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| 226 | <para>
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[0dc5c2e1] | 227 | Some tests may hang. They can be removed if necessary, for example:
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| 228 | <command>rm test/shell/lvconvert-raid-reshape.sh</command>. The tests
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| 229 | generate a lot of kernel messages, which may clutter your terminal. You
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| 230 | can disable them by issuing <command>dmesg -D</command> before running
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| 231 | the tests (do not forget to issue <command>dmesg -E</command> when tests
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| 232 | are done).
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[fbcb3846] | 233 |
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| 234 | <note><simpara>The checks create device nodes in the /tmp directory. The
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[e43a4270] | 235 | tests will fail if /tmp is mounted with the nodev option.
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| 236 | </simpara></note>
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[c627795] | 237 | </para>
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[8bc3edae] | 238 |
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[c627795] | 239 | <para>
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| 240 | Now, as the <systemitem class="username">root</systemitem> user:
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| 241 | </para>
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[8bc3edae] | 242 |
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[bbc76b21] | 243 | <screen role="root" revision="sysv"><userinput>make install
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[213d18c] | 244 | rm -fv /usr/lib/udev/rules.d/69-dm-lvm.rules</userinput></screen>
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[55dc313] | 245 |
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| 246 | <screen role="root" revision="systemd"><userinput>make install
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| 247 | make install_systemd_units</userinput></screen>
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[8bc3edae] | 248 |
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| 249 | </sect2>
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| 250 |
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| 251 | <sect2 role="commands">
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| 252 | <title>Command Explanations</title>
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| 253 |
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[e94d178] | 254 | <para>
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[22e249a] | 255 | <command>PATH+=:/usr/sbin</command>: The path
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| 256 | must contain
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[e94d178] | 257 | <filename class='directory'>/usr/sbin</filename> for proper system tool
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[41d504a] | 258 | detection by the <command>configure</command> script. This instruction
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[41e2bf5] | 259 | ensures that PATH is properly set even if you build as an unprivileged user.
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[e94d178] | 260 | </para>
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| 261 |
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[c627795] | 262 | <para>
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[2800af7] | 263 | <parameter>--enable-cmdlib</parameter>: This switch enables
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[c627795] | 264 | building of the shared command library. It is required
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| 265 | when building the event daemon.
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| 266 | </para>
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| 267 |
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| 268 | <para>
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[2800af7] | 269 | <parameter>--enable-pkgconfig</parameter>: This switch enables
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[c627795] | 270 | installation of <command>pkg-config</command> support files.
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| 271 | </para>
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| 272 |
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| 273 | <para>
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[2800af7] | 274 | <parameter>--enable-udev_sync</parameter>: This switch enables
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[c627795] | 275 | synchronisation with <application>Udev</application> processing.
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| 276 | </para>
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| 277 |
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| 278 | <para>
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| 279 | <option>--enable-dmeventd</option>: This switch enables
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| 280 | building of the <application>Device Mapper</application>
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| 281 | event daemon.
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| 282 | </para>
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[8bc3edae] | 283 |
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[bbc76b21] | 284 | <para revision="sysv">
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| 285 | <command>rm .../69-dm-lvm.rules</command>: Under certain circumstances,
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| 286 | this udev rule calls <command>systemd-run</command>, which is not
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| 287 | available on sysv. It performs actions that are done by another boot
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| 288 | script anyway, so it is not needed.
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| 289 | </para>
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| 290 |
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[55dc313] | 291 | <para revision="systemd">
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| 292 | <command>make install_systemd_units</command>: This is needed to install
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| 293 | a unit that activates logical volumes at boot. It is not installed
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| 294 | by default.
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| 295 | </para>
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| 296 |
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[8bc3edae] | 297 | </sect2>
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| 298 |
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[ff12c0f] | 299 | <sect2 role="configuration" revision="systemd">
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| 300 | <title>Configuring LVM2</title>
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| 301 |
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| 302 | <sect3 id="lvm2-config">
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| 303 | <title>Config File</title>
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| 304 | <para>
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| 305 | <filename>/etc/lvm/lvm.conf</filename>
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| 306 | </para>
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| 307 |
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| 308 | <indexterm zone="lvm2 lvm2-config">
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| 309 | <primary
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| 310 | sortas="e-etc-lvm-lvm.conf">/etc/lvm/lvm.conf</primary>
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| 311 | </indexterm>
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| 312 | </sect3>
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| 313 |
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| 314 | <sect3><title>Configuration Information</title>
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| 315 | <para>
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| 316 | The default configuration still references the obsolete <filename
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| 317 | class="directory">/var/lock</filename> directory. This creates
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[9169ed5d] | 318 | a deadlock at boot time. Change this (as the <systemitem
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[ff12c0f] | 319 | class="username">root</systemitem> user):
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| 320 | </para>
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| 321 |
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| 322 | <screen role="root"><userinput>sed -e '/locking_dir =/{s/#//;s/var/run/}' \
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| 323 | -i /etc/lvm/lvm.conf</userinput></screen>
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| 324 |
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| 325 | </sect3>
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| 326 | </sect2>
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| 327 |
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[8bc3edae] | 328 | <sect2 role="content">
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| 329 | <title>Contents</title>
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| 330 |
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| 331 | <segmentedlist>
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| 332 | <segtitle>Installed Programs</segtitle>
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| 333 | <segtitle>Installed Libraries</segtitle>
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[c3c56b2] | 334 | <segtitle>Installed Directories</segtitle>
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[8bc3edae] | 335 |
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| 336 | <seglistitem>
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[c627795] | 337 | <seg>
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[51ba03e] | 338 | blkdeactivate, dmeventd (optional), dmsetup, fsadm, lvm, lvmdump,
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| 339 | and lvm_import_vdo.
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[23ed085] | 340 | There are also numerous symbolic links to lvm that implement specific
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[09765cf] | 341 | functionalities
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[c627795] | 342 | </seg>
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| 343 | <seg>
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[23ed085] | 344 | libdevmapper.so and liblvm2cmd.so; optional:
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[a037dab] | 345 | libdevmapper-event.so, libdevmapper-event-lvm2.so,
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[8ec0245] | 346 | libdevmapper-event-lvm2mirror.so, libdevmapper-event-lvm2raid.so,
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[51ba03e] | 347 | libdevmapper-event-lvm2snapshot.so, libdevmapper-event-lvm2thin.so,
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| 348 | and libdevmapper-event-lvm2vdo.so
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[c627795] | 349 | </seg>
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[c3c56b2] | 350 | <seg>
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[a037dab] | 351 | /etc/lvm and
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[51ba03e] | 352 | /usr/lib/device-mapper (optional)
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[c3c56b2] | 353 | </seg>
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[8bc3edae] | 354 | </seglistitem>
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| 355 | </segmentedlist>
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| 356 |
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| 357 | <variablelist>
|
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| 358 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
|
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| 359 | <?dbfo list-presentation="list"?>
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[61b95ac4] | 360 |
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| 361 | <?dbhtml list-presentation="table"?>
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[8bc3edae] | 362 |
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[8ed30d52] | 363 | <varlistentry id="blkdeactivate">
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| 364 | <term><command>blkdeactivate</command></term>
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| 365 | <listitem>
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| 366 | <para>
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[4c24eb0a] | 367 | is a utility to deactivate block devices
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[8ed30d52] | 368 | </para>
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| 369 | <indexterm zone="lvm2 blkdeactivate">
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| 370 | <primary sortas="b-blkdeactivate">blkdeactivate</primary>
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| 371 | </indexterm>
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| 372 | </listitem>
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| 373 | </varlistentry>
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| 374 |
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[a037dab] | 375 | <varlistentry id="dmeventd">
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| 376 | <term><command>dmeventd</command></term>
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| 377 | <listitem>
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| 378 | <para>
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[4c24eb0a] | 379 | (optional) is the Device Mapper event daemon
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[a037dab] | 380 | </para>
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| 381 | <indexterm zone="lvm2 dmeventd">
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| 382 | <primary sortas="b-dmeventd">dmeventd</primary>
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| 383 | </indexterm>
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| 384 | </listitem>
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| 385 | </varlistentry>
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| 386 |
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[8bc3edae] | 387 | <varlistentry id="dmsetup">
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| 388 | <term><command>dmsetup</command></term>
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| 389 | <listitem>
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[c627795] | 390 | <para>
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[4c24eb0a] | 391 | is a low level logical volume management tool
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[c627795] | 392 | </para>
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[8bc3edae] | 393 | <indexterm zone="lvm2 dmsetup">
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| 394 | <primary sortas="b-dmsetup">dmsetup</primary>
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| 395 | </indexterm>
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| 396 | </listitem>
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| 397 | </varlistentry>
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| 398 |
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| 399 | <varlistentry id="fsadm">
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| 400 | <term><command>fsadm</command></term>
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| 401 | <listitem>
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[c627795] | 402 | <para>
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[4c24eb0a] | 403 | is a utility used to resize or check filesystem on a device
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[c627795] | 404 | </para>
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[8bc3edae] | 405 | <indexterm zone="lvm2 fsadm">
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| 406 | <primary sortas="b-fsadm">fsadm</primary>
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| 407 | </indexterm>
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| 408 | </listitem>
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| 409 | </varlistentry>
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| 410 |
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| 411 | <varlistentry id="lvm">
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| 412 | <term><command>lvm</command></term>
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| 413 | <listitem>
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[c627795] | 414 | <para>
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| 415 | provides the command-line tools for <application>LVM2</application>.
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[b9c353b] | 416 | Commands are implemented via symbolic links to this program to
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[c627795] | 417 | manage physical devices (pv*), volume groups (vg*) and logical
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[4c24eb0a] | 418 | volumes (lv*)
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[c627795] | 419 | </para>
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[8bc3edae] | 420 | <indexterm zone="lvm2 lvm">
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| 421 | <primary sortas="b-lvm">lvm</primary>
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| 422 | </indexterm>
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| 423 | </listitem>
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| 424 | </varlistentry>
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| 425 |
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[23ed085] | 426 | <!--
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[8bc3edae] | 427 | <varlistentry id="lvmconf">
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| 428 | <term><command>lvmconf</command></term>
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| 429 | <listitem>
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[c627795] | 430 | <para>
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[0d7900a] | 431 | is a script that modifies the locking configuration in
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[c627795] | 432 | the <application>LVM2</application> configuration file.
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| 433 | </para>
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[8bc3edae] | 434 | <indexterm zone="lvm2 lvmconf">
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| 435 | <primary sortas="b-lvmconf">lvmconf</primary>
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| 436 | </indexterm>
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| 437 | </listitem>
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| 438 | </varlistentry>
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[23ed085] | 439 | -->
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[8bc3edae] | 440 |
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| 441 | <varlistentry id="lvmdump">
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| 442 | <term><command>lvmdump</command></term>
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| 443 | <listitem>
|
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[c627795] | 444 | <para>
|
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| 445 | is a tool used to dump various information concerning
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[4c24eb0a] | 446 | <application>LVM2</application>
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[c627795] | 447 | </para>
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[8bc3edae] | 448 | <indexterm zone="lvm2 lvmdump">
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| 449 | <primary sortas="b-lvmdump">lvmdump</primary>
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| 450 | </indexterm>
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| 451 | </listitem>
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| 452 | </varlistentry>
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| 453 |
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| 454 | <varlistentry id="vgimportclone">
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| 455 | <term><command>vgimportclone</command></term>
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| 456 | <listitem>
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[c627795] | 457 | <para>
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[4c24eb0a] | 458 | is used to import a duplicated VG (e.g. hardware snapshot)
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[c627795] | 459 | </para>
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[8bc3edae] | 460 | <indexterm zone="lvm2 vgimportclone">
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| 461 | <primary sortas="b-vgimportclone">vgimportclone</primary>
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| 462 | </indexterm>
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| 463 | </listitem>
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| 464 | </varlistentry>
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| 465 |
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| 466 | <varlistentry id="libdevmapper">
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[4c24eb0a] | 467 | <term><filename class="libraryfile">libdevmapper.so</filename></term>
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[8bc3edae] | 468 | <listitem>
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[c627795] | 469 | <para>
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| 470 | contains the <application>Device Mapper</application> API
|
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[4c24eb0a] | 471 | functions
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[c627795] | 472 | </para>
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[8bc3edae] | 473 | <indexterm zone="lvm2 libdevmapper">
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| 474 | <primary sortas="c-libdevmapper">libdevmapper.so</primary>
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| 475 | </indexterm>
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| 476 | </listitem>
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| 477 | </varlistentry>
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| 478 |
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| 479 | </variablelist>
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| 480 |
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| 481 | </sect2>
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| 482 |
|
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| 483 | </sect1>
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