[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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[e440af5] | 14 | tests. -pierre, August 2020
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[e5e327a] | 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='valgrind'/>,
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| 91 | <xref linkend='which'/>,
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[b643f16b] | 92 | <xref linkend='xfsprogs'/> (all four may be used, but are not required,
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[d5f6e8e] | 93 | for tests),
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[b643f16b] | 94 | <ulink
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| 95 | url='https://mirrors.edge.kernel.org/pub/linux/kernel/people/jeffm/reiserfsprogs/'>
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| 96 | reiserfsprogs</ulink>,
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[99fcc47] | 97 | <ulink url='https://github.com/jthornber/thin-provisioning-tools'>
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[d5f6e8e] | 98 | thin-provisioning-tools</ulink>, and
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| 99 | <ulink url="https://github.com/dm-vdo/vdo">vdo</ulink>
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[b5e8375] | 100 | </para>
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| 101 |
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[8bc3edae] | 102 | </sect2>
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| 103 |
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[c627795] | 104 | <sect2 role="kernel" id="lvm2-kernel">
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[7e1df8f9] | 105 | <title>Kernel Configuration</title>
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| 106 |
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[c627795] | 107 | <para>
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[421128a1] | 108 | Enable the following options in the kernel configuration
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[c627795] | 109 | and recompile the kernel:
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| 110 | </para>
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[7e1df8f9] | 111 |
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[b5e8375] | 112 | <note><para>
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| 113 | There are several other Device Mapper options in the kernel beyond those
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| 114 | listed below. In order to get reasonable results if running the
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| 115 | regression tests, all must be enabled either internally or as a module.
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[302a619] | 116 | The tests will all time out if Magic SysRq key is not enabled.
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[b5e8375] | 117 | </para></note>
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| 118 |
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[d67d543] | 119 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 120 | href="lvm2-kernel.xml"/>
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[7e1df8f9] | 121 |
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| 122 | <indexterm zone="lvm2 lvm2-kernel">
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| 123 | <primary sortas="d-lvm2">lvm2</primary>
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| 124 | </indexterm>
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| 125 |
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| 126 | </sect2>
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| 127 |
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[8bc3edae] | 128 | <sect2 role="installation">
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[c627795] | 129 | <title>Installation of LVM2</title>
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[8bc3edae] | 130 |
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[c627795] | 131 | <para>
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| 132 | Install <application>LVM2</application> by running the following
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| 133 | commands:
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| 134 | </para>
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[8bc3edae] | 135 |
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[22e249a] | 136 | <screen><userinput>PATH+=:/usr/sbin \
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[e94d178] | 137 | ./configure --prefix=/usr \
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[4591404] | 138 | --enable-cmdlib \
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| 139 | --enable-pkgconfig \
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[46a9711b] | 140 | --enable-udev_sync &&
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[c470ab9] | 141 | make</userinput></screen>
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[8bc3edae] | 142 |
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[c627795] | 143 | <para>
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[99fcc47] | 144 | The tests use <application>udev</application> for logical volume
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[8991a7cb] | 145 | synchronization, so the LVM udev rules and some utilities need to
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[99fcc47] | 146 | be installed before running the tests. If you are installing
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| 147 | <application>LVM2</application> for the first time, and do not
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| 148 | want to install the full package before running the tests, the minimal
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| 149 | set of utilities can be installed by running the following instructions
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| 150 | as the <systemitem class="username">root</systemitem> user:
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| 151 | </para>
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| 152 |
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[06908bf6] | 153 | <screen role="root"
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| 154 | remap="test"><userinput>make -C tools install_tools_dynamic &&
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[1ba8e5ee] | 155 | make -C udev install &&
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[99fcc47] | 156 | make -C libdm install</userinput></screen>
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| 157 |
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| 158 | <para>
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[06908bf6] | 159 | To test the results, issue, as the
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| 160 | <systemitem class="username">root</systemitem> user:
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| 161 | </para>
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| 162 |
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| 163 | <screen role="root"
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[213d18c] | 164 | remap="test"><userinput>LC_ALL=en_US.UTF-8 make check_local</userinput></screen>
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[06908bf6] | 165 |
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| 166 | <para>
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[213d18c] | 167 | Some tests may hang. In this case they can be skipped by adding
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| 168 | <command>S=<testname></command> to the <command>make</command>
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| 169 | command.
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[06908bf6] | 170 | Other targets are available and can be listed with
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| 171 | <command>make -C test help</command>. The test timings are very dependent
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| 172 | on the speed of the disk(s), and on the number of enabled kernel options.
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[f9431b6] | 173 | </para>
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[20c731a] | 174 |
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[6c6f393] | 175 | <!-- Results for LVM2.2.02.176:
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| 176 | ### 292 tests: 177 passed, 46 skipped, 0 timed out, 60 warned, 9 failed
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[5d01724] | 177 |
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| 178 | Results for LVM2.2.03.01:
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| 179 | ### 302 tests: 182 passed, 43 skipped, 0 timed out, 62 warned, 15 failed
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[23ed085] | 180 |
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| 181 | Results for LVM2.2.03.05:
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| 182 | ### 326 tests: 255 passed, 58 skipped, 0 timed out, 2 warned, 11 failed
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[1c6b54be] | 183 |
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| 184 | Results for LVM2.2.03.09:
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| 185 | ### 338 tests: 212 passed, 41 skipped, 0 timed out, 70 warned, 15 failed
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[d5f6e8e] | 186 |
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| 187 | Results for LVM2.2.03.11:
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| 188 | ### 357 tests: 231 passed, 32 skipped, 0 timed out, 77 warned, 17 failed
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[51ba03e] | 189 |
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| 190 | Results for LVM2.2.03.14:
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| 191 | ### 389 tests: 304 passed, 73 skipped, 0 timed out, 2 warned, 10 failed
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[f9478ee] | 192 |
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| 193 | Results for LVM2.2.03.16:
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| 194 | ### 395 tests: 241 passed, 145 skipped, 0 timed out, 1 warned, 8 failed
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[213d18c] | 195 |
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| 196 | Results for LVM2.2.03.17:
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| 197 | ### 403 tests: 333 passed, 61 skipped, 0 timed out, 3 warned, 6 failed
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[187200ac] | 198 |
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| 199 | Results for LVM2.2.03.20 [pierre]:
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| 200 | ### 407 tests: 324 passed, 75 skipped, 0 timed out, 3 warned, 5 failed
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[20c731a] | 201 | -->
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| 202 |
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[f9431b6] | 203 | <para>
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[af8a78d] | 204 | The tests do not implement the <quote>expected fail</quote> possibility,
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[8558044] | 205 | and a small number of test failures is expected by upstream.
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| 206 | <!-- 1 -->More failures may happen because some kernel options are missing.
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| 207 | For example, the lack of the <emphasis>dm-delay</emphasis> device
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| 208 | mapper target explains some failures.
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| 209 | <!-- 2 -->Some tests may fail if there is insufficient free space available
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| 210 | in the partition with the /tmp directory. At least one test fails if 16 TB
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[e43a4270] | 211 | is not available.
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| 212 | <!-- 3 -->Some tests are flagged <quote>warned</quote> if
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[f9431b6] | 213 | <ulink url='https://github.com/jthornber/thin-provisioning-tools'>
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| 214 | thin-provisioning-tools</ulink> are not installed. A workaround is to
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| 215 | add the following flags to <command>configure</command>:
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| 216 | </para>
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| 217 |
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| 218 | <screen role="nodump"><userinput> --with-thin-check= \
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| 219 | --with-thin-dump= \
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| 220 | --with-thin-repair= \
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| 221 | --with-thin-restore= \
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| 222 | --with-cache-check= \
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| 223 | --with-cache-dump= \
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| 224 | --with-cache-repair= \
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| 225 | --with-cache-restore= \</userinput></screen>
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| 226 |
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| 227 | <para>
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[0dc5c2e1] | 228 | Some tests may hang. They can be removed if necessary, for example:
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| 229 | <command>rm test/shell/lvconvert-raid-reshape.sh</command>. The tests
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| 230 | generate a lot of kernel messages, which may clutter your terminal. You
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| 231 | can disable them by issuing <command>dmesg -D</command> before running
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| 232 | the tests (do not forget to issue <command>dmesg -E</command> when tests
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| 233 | are done).
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[fbcb3846] | 234 |
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| 235 | <note><simpara>The checks create device nodes in the /tmp directory. The
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[e43a4270] | 236 | tests will fail if /tmp is mounted with the nodev option.
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| 237 | </simpara></note>
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[c627795] | 238 | </para>
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[8bc3edae] | 239 |
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[c627795] | 240 | <para>
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| 241 | Now, as the <systemitem class="username">root</systemitem> user:
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| 242 | </para>
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[8bc3edae] | 243 |
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[bbc76b21] | 244 | <screen role="root" revision="sysv"><userinput>make install
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[213d18c] | 245 | rm -fv /usr/lib/udev/rules.d/69-dm-lvm.rules</userinput></screen>
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[55dc313] | 246 |
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| 247 | <screen role="root" revision="systemd"><userinput>make install
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| 248 | make install_systemd_units</userinput></screen>
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[8bc3edae] | 249 |
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| 250 | </sect2>
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| 251 |
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| 252 | <sect2 role="commands">
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| 253 | <title>Command Explanations</title>
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| 254 |
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[e94d178] | 255 | <para>
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[22e249a] | 256 | <command>PATH+=:/usr/sbin</command>: The path
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| 257 | must contain
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[e94d178] | 258 | <filename class='directory'>/usr/sbin</filename> for proper system tool
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[41d504a] | 259 | detection by the <command>configure</command> script. This instruction
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[41e2bf5] | 260 | ensures that PATH is properly set even if you build as an unprivileged user.
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[e94d178] | 261 | </para>
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| 262 |
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[c627795] | 263 | <para>
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[2800af7] | 264 | <parameter>--enable-cmdlib</parameter>: This switch enables
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[c627795] | 265 | building of the shared command library. It is required
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| 266 | when building the event daemon.
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| 267 | </para>
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| 268 |
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| 269 | <para>
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[2800af7] | 270 | <parameter>--enable-pkgconfig</parameter>: This switch enables
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[c627795] | 271 | installation of <command>pkg-config</command> support files.
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| 272 | </para>
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| 273 |
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| 274 | <para>
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[2800af7] | 275 | <parameter>--enable-udev_sync</parameter>: This switch enables
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[c627795] | 276 | synchronisation with <application>Udev</application> processing.
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| 277 | </para>
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| 278 |
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| 279 | <para>
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| 280 | <option>--enable-dmeventd</option>: This switch enables
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| 281 | building of the <application>Device Mapper</application>
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| 282 | event daemon.
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| 283 | </para>
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[8bc3edae] | 284 |
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[bbc76b21] | 285 | <para revision="sysv">
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| 286 | <command>rm .../69-dm-lvm.rules</command>: Under certain circumstances,
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| 287 | this udev rule calls <command>systemd-run</command>, which is not
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| 288 | available on sysv. It performs actions that are done by another boot
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| 289 | script anyway, so it is not needed.
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| 290 | </para>
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| 291 |
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[55dc313] | 292 | <para revision="systemd">
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| 293 | <command>make install_systemd_units</command>: This is needed to install
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| 294 | a unit that activates logical volumes at boot. It is not installed
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| 295 | by default.
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| 296 | </para>
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| 297 |
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[8bc3edae] | 298 | </sect2>
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| 299 |
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[ff12c0f] | 300 | <sect2 role="configuration" revision="systemd">
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| 301 | <title>Configuring LVM2</title>
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| 302 |
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| 303 | <sect3 id="lvm2-config">
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| 304 | <title>Config File</title>
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| 305 | <para>
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| 306 | <filename>/etc/lvm/lvm.conf</filename>
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| 307 | </para>
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| 308 |
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| 309 | <indexterm zone="lvm2 lvm2-config">
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| 310 | <primary
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| 311 | sortas="e-etc-lvm-lvm.conf">/etc/lvm/lvm.conf</primary>
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| 312 | </indexterm>
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| 313 | </sect3>
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| 314 |
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| 315 | <sect3><title>Configuration Information</title>
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| 316 | <para>
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| 317 | The default configuration still references the obsolete <filename
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| 318 | class="directory">/var/lock</filename> directory. This creates
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[9169ed5d] | 319 | a deadlock at boot time. Change this (as the <systemitem
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[ff12c0f] | 320 | class="username">root</systemitem> user):
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| 321 | </para>
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| 322 |
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| 323 | <screen role="root"><userinput>sed -e '/locking_dir =/{s/#//;s/var/run/}' \
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| 324 | -i /etc/lvm/lvm.conf</userinput></screen>
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| 325 |
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| 326 | </sect3>
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| 327 | </sect2>
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| 328 |
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[8bc3edae] | 329 | <sect2 role="content">
|
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| 330 | <title>Contents</title>
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| 331 |
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| 332 | <segmentedlist>
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| 333 | <segtitle>Installed Programs</segtitle>
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| 334 | <segtitle>Installed Libraries</segtitle>
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[c3c56b2] | 335 | <segtitle>Installed Directories</segtitle>
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[8bc3edae] | 336 |
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| 337 | <seglistitem>
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[c627795] | 338 | <seg>
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[51ba03e] | 339 | blkdeactivate, dmeventd (optional), dmsetup, fsadm, lvm, lvmdump,
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| 340 | and lvm_import_vdo.
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[23ed085] | 341 | There are also numerous symbolic links to lvm that implement specific
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[09765cf] | 342 | functionalities
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[c627795] | 343 | </seg>
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| 344 | <seg>
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[23ed085] | 345 | libdevmapper.so and liblvm2cmd.so; optional:
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[a037dab] | 346 | libdevmapper-event.so, libdevmapper-event-lvm2.so,
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[8ec0245] | 347 | libdevmapper-event-lvm2mirror.so, libdevmapper-event-lvm2raid.so,
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[51ba03e] | 348 | libdevmapper-event-lvm2snapshot.so, libdevmapper-event-lvm2thin.so,
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| 349 | and libdevmapper-event-lvm2vdo.so
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[c627795] | 350 | </seg>
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[c3c56b2] | 351 | <seg>
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[a037dab] | 352 | /etc/lvm and
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[51ba03e] | 353 | /usr/lib/device-mapper (optional)
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[c3c56b2] | 354 | </seg>
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[8bc3edae] | 355 | </seglistitem>
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| 356 | </segmentedlist>
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| 357 |
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| 358 | <variablelist>
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| 359 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 360 | <?dbfo list-presentation="list"?>
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[61b95ac4] | 361 |
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| 362 | <?dbhtml list-presentation="table"?>
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[8bc3edae] | 363 |
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[8ed30d52] | 364 | <varlistentry id="blkdeactivate">
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| 365 | <term><command>blkdeactivate</command></term>
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| 366 | <listitem>
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| 367 | <para>
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[4c24eb0a] | 368 | is a utility to deactivate block devices
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[8ed30d52] | 369 | </para>
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| 370 | <indexterm zone="lvm2 blkdeactivate">
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| 371 | <primary sortas="b-blkdeactivate">blkdeactivate</primary>
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| 372 | </indexterm>
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| 373 | </listitem>
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| 374 | </varlistentry>
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| 375 |
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[a037dab] | 376 | <varlistentry id="dmeventd">
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| 377 | <term><command>dmeventd</command></term>
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| 378 | <listitem>
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| 379 | <para>
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[4c24eb0a] | 380 | (optional) is the Device Mapper event daemon
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[a037dab] | 381 | </para>
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| 382 | <indexterm zone="lvm2 dmeventd">
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| 383 | <primary sortas="b-dmeventd">dmeventd</primary>
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| 384 | </indexterm>
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| 385 | </listitem>
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| 386 | </varlistentry>
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| 387 |
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[8bc3edae] | 388 | <varlistentry id="dmsetup">
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| 389 | <term><command>dmsetup</command></term>
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| 390 | <listitem>
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[c627795] | 391 | <para>
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[4c24eb0a] | 392 | is a low level logical volume management tool
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[c627795] | 393 | </para>
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[8bc3edae] | 394 | <indexterm zone="lvm2 dmsetup">
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| 395 | <primary sortas="b-dmsetup">dmsetup</primary>
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| 396 | </indexterm>
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| 397 | </listitem>
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| 398 | </varlistentry>
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| 399 |
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| 400 | <varlistentry id="fsadm">
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| 401 | <term><command>fsadm</command></term>
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| 402 | <listitem>
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[c627795] | 403 | <para>
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[4c24eb0a] | 404 | is a utility used to resize or check filesystem on a device
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[c627795] | 405 | </para>
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[8bc3edae] | 406 | <indexterm zone="lvm2 fsadm">
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| 407 | <primary sortas="b-fsadm">fsadm</primary>
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| 408 | </indexterm>
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| 409 | </listitem>
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| 410 | </varlistentry>
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| 411 |
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| 412 | <varlistentry id="lvm">
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| 413 | <term><command>lvm</command></term>
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| 414 | <listitem>
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[c627795] | 415 | <para>
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| 416 | provides the command-line tools for <application>LVM2</application>.
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[b9c353b] | 417 | Commands are implemented via symbolic links to this program to
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[c627795] | 418 | manage physical devices (pv*), volume groups (vg*) and logical
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[4c24eb0a] | 419 | volumes (lv*)
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[c627795] | 420 | </para>
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[8bc3edae] | 421 | <indexterm zone="lvm2 lvm">
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| 422 | <primary sortas="b-lvm">lvm</primary>
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| 423 | </indexterm>
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| 424 | </listitem>
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| 425 | </varlistentry>
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| 426 |
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[23ed085] | 427 | <!--
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[8bc3edae] | 428 | <varlistentry id="lvmconf">
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| 429 | <term><command>lvmconf</command></term>
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| 430 | <listitem>
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[c627795] | 431 | <para>
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[0d7900a] | 432 | is a script that modifies the locking configuration in
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[c627795] | 433 | the <application>LVM2</application> configuration file.
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| 434 | </para>
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[8bc3edae] | 435 | <indexterm zone="lvm2 lvmconf">
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| 436 | <primary sortas="b-lvmconf">lvmconf</primary>
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| 437 | </indexterm>
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| 438 | </listitem>
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| 439 | </varlistentry>
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[23ed085] | 440 | -->
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[8bc3edae] | 441 |
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| 442 | <varlistentry id="lvmdump">
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| 443 | <term><command>lvmdump</command></term>
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| 444 | <listitem>
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[c627795] | 445 | <para>
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| 446 | is a tool used to dump various information concerning
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[4c24eb0a] | 447 | <application>LVM2</application>
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[c627795] | 448 | </para>
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[8bc3edae] | 449 | <indexterm zone="lvm2 lvmdump">
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| 450 | <primary sortas="b-lvmdump">lvmdump</primary>
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| 451 | </indexterm>
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| 452 | </listitem>
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| 453 | </varlistentry>
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| 454 |
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| 455 | <varlistentry id="vgimportclone">
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| 456 | <term><command>vgimportclone</command></term>
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| 457 | <listitem>
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[c627795] | 458 | <para>
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[4c24eb0a] | 459 | is used to import a duplicated VG (e.g. hardware snapshot)
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[c627795] | 460 | </para>
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[8bc3edae] | 461 | <indexterm zone="lvm2 vgimportclone">
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| 462 | <primary sortas="b-vgimportclone">vgimportclone</primary>
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| 463 | </indexterm>
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| 464 | </listitem>
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| 465 | </varlistentry>
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| 466 |
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| 467 | <varlistentry id="libdevmapper">
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[4c24eb0a] | 468 | <term><filename class="libraryfile">libdevmapper.so</filename></term>
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[8bc3edae] | 469 | <listitem>
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[c627795] | 470 | <para>
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| 471 | contains the <application>Device Mapper</application> API
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[4c24eb0a] | 472 | functions
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[c627795] | 473 | </para>
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[8bc3edae] | 474 | <indexterm zone="lvm2 libdevmapper">
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| 475 | <primary sortas="c-libdevmapper">libdevmapper.so</primary>
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| 476 | </indexterm>
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| 477 | </listitem>
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| 478 | </varlistentry>
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| 479 |
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| 480 | </variablelist>
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| 481 |
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| 482 | </sect2>
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| 483 |
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| 484 | </sect1>
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