[blfs-book] r9448 - in trunk: BOOK BOOK/introduction/welcome BOOK/postlfs/filesystems bootscripts bootscripts/blfs/init.d bootscripts/blfs/services

bdubbs at linuxfromscratch.org bdubbs at linuxfromscratch.org
Thu Feb 16 21:40:02 PST 2012


Author: bdubbs
Date: 2012-02-16 22:39:57 -0700 (Thu, 16 Feb 2012)
New Revision: 9448

Added:
   trunk/BOOK/postlfs/filesystems/aboutlvm.xml
Modified:
   trunk/BOOK/general.ent
   trunk/BOOK/introduction/welcome/changelog.xml
   trunk/BOOK/postlfs/filesystems/filesystems.xml
   trunk/BOOK/postlfs/filesystems/lvm2.xml
   trunk/bootscripts/Makefile
   trunk/bootscripts/blfs/init.d/ntpd
   trunk/bootscripts/blfs/services/bridge
Log:
Add section 'About LVM'
Update kernel requirements in lvm2
Remove -x from ntpd bootscript


Modified: trunk/BOOK/general.ent
===================================================================
--- trunk/BOOK/general.ent	2012-02-17 01:32:24 UTC (rev 9447)
+++ trunk/BOOK/general.ent	2012-02-17 05:39:57 UTC (rev 9448)
@@ -59,7 +59,7 @@
 <!ENTITY lfs-vim-version              "7.3">
 <!-- End LFS versions -->
 
-<!ENTITY blfs-bootscripts-version     "20120206">
+<!ENTITY blfs-bootscripts-version     "20120216">
 <!ENTITY blfs-bootscripts-download    "&downloads-root;/blfs-bootscripts-&blfs-bootscripts-version;.tar.bz2">
 
 <!ENTITY blfs-wiki                    "http://wiki.&lfs-domainname;/blfs/wiki">

Modified: trunk/BOOK/introduction/welcome/changelog.xml
===================================================================
--- trunk/BOOK/introduction/welcome/changelog.xml	2012-02-17 01:32:24 UTC (rev 9447)
+++ trunk/BOOK/introduction/welcome/changelog.xml	2012-02-17 05:39:57 UTC (rev 9448)
@@ -45,6 +45,13 @@
       <para>February 17th, 2012</para>
       <itemizedlist>
         <listitem>
+          <para>[bdubbs] - Add section 'About LVM'.  Update kernel
+          requirements in lvm2.</para>
+        </listitem>
+        <listitem>
+          <para>[bdubbs] - Remove -x from nptd bootscript.</para>
+        </listitem>
+        <listitem>
           <para>[ken] - merge mousetweaks-3.2.1 from Wayne.</para>
         </listitem>
         <listitem>

Copied: trunk/BOOK/postlfs/filesystems/aboutlvm.xml (from rev 9416, trunk/BOOK/postlfs/filesystems/aboutraid.xml)
===================================================================
--- trunk/BOOK/postlfs/filesystems/aboutlvm.xml	                        (rev 0)
+++ trunk/BOOK/postlfs/filesystems/aboutlvm.xml	2012-02-17 05:39:57 UTC (rev 9448)
@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
+  <!ENTITY % general-entities SYSTEM "../../general.ent">
+  %general-entities;
+]>
+
+<sect1 id="aboutlvm">
+  <?dbhtml filename="aboutlvm.html"?>
+
+  <sect1info>
+    <othername>$LastChangedBy$</othername>
+    <date>$Date$</date>
+  </sect1info>
+
+  <title>About Logical Volume Management (LVM)</title>
+
+  <para>LVM manages disk drives.  It allows multiple drives and partitions
+  to be combined into larger <emphasis>volume groups</emphasis>, assists in 
+  making backups through a <emphasis>snapshot</emphasis>, and allows for 
+  dynamic volume resizing. It can also provide mirroring similar to
+  a RAID 1 array.</para>
+
+  <para>A complete discussion of LVM is beyond the scope of this introduction,
+  but basic concepts are presented below.</para>
+  
+  <para>To run any of the commands presented here, the <xref linkend='lvm2'/>
+  package must be installed.  All commands must be run as the <systemitem
+  class="username">root</systemitem> user.</para>
+
+  <para>Management of disks with lvm is accomplished using the following
+  concepts: </para>
+
+  <variablelist>
+    <varlistentry>
+      <term>physical volumes</term>
+      <listitem><para>These are physical disks or partitions such as
+      /dev/sda3 or /dev/sdb.</para></listitem>
+    </varlistentry>
+
+    <varlistentry>
+      <term>volume groups</term>
+      <listitem><para>These are named groups of physical volumes that
+      can be manipulated by the administrator.  The number of physical
+      volumes that make up a volume group is arbitrary.  Physical volumes 
+      can be dynamically added or removed from a volume group.  
+      </para></listitem>
+    </varlistentry>
+
+    <varlistentry>
+      <term>logical volumes</term>
+      <listitem><para>Volume groups may be subdivided into logical volumes.
+      Each logical volume can then be individually formatted as if it were a
+      regular Linux partition. Logical volumes may be dynamically resized by
+      the administrator according to need.</para></listitem>
+
+    </varlistentry>
+  </variablelist> 
+
+  <para>To give a concrete example, suppose that we have two 2 TB disks.
+  Also suppose a really large amount of space is required for a very large database,
+  mounted on <filename class='directory'>/srv/mysql</filename>.  This is what
+  the initial set of partitions would look like:</para>
+
+  <screen><literal>Partition  Use    Size      Partition Type
+/dev/sda1  /boot  100MB     83 (Linux)
+/dev/sda2  /       10GB     83 (Linux)
+/dev/sda3  swap     2GB     82 (Swap)
+/dev/sda4  LVM    remainder 8e (LVM)
+/dev/sdb1  swap     2GB     82 (Swap)
+/dev/sdb2  LVM    remainder 8e (LVM)</literal></screen> 
+
+  <para>First initialize the physical volumes:</para>
+
+  <screen><userinput>pvcreate /dev/sda4 /dev/sdb2</userinput></screen>
+
+  <para>Next create a volume group named lfs-lvm:</para>
+
+  <screen><userinput>vgcreate lfs-lvm /dev/sda4  /dev/sdb2</userinput></screen>
+
+  <para>The status of the volume group can be checked by running the command
+  <command>vgscan</command>. Now create the logical volumes.  Since there is
+  about 3900 GB available, leave about 900 GB free for expansion. Note that the
+  logical volume named <emphasis>mysql</emphasis> is larger than any physical
+  disk.  </para>
+
+  <screen><userinput>lvcreate --name mysql --size 2500G lfs-lvm
+lvcreate --name home  --size  500G lfs-lvm</userinput></screen>
+
+  <para>Finally the logical volumes can be formatted and mounted.  In this
+  example, the jfs file system (<xref linkend='jfsutils'/>) is used for 
+  demonstration purposes.</para>
+
+  <screen><userinput>mkfs -t ext4 /dev/lfs-lvm/home
+mkfs -t jfs  /dev/lfs-lvm/mysql
+mount /dev/lfs-lvm/home /home
+mkdir -p /srv/mysql
+mount /dev/lfs-lvm/mysql /srv/mysql</userinput></screen>
+
+  <para>The LFS boot scripts automatically make these file systems available
+  to the system in the checkfs script.  Edit the <filename>/etc/fstab</filename>
+  file as required to automatically mount them.</para>
+
+  <para>A LVM logical volume can host a root filesystem, but requires the use
+  of an initramfs (initial RAM file system) and is not discussed here.</para>
+  
+  <para>For a more information about LVM, see the <ulink
+  url="http://www.tldp.org/HOWTO/LVM-HOWTO/">LVM HOWTO</ulink> and
+  the lvm man pages.</para>
+
+</sect1>

Modified: trunk/BOOK/postlfs/filesystems/filesystems.xml
===================================================================
--- trunk/BOOK/postlfs/filesystems/filesystems.xml	2012-02-17 01:32:24 UTC (rev 9447)
+++ trunk/BOOK/postlfs/filesystems/filesystems.xml	2012-02-17 05:39:57 UTC (rev 9448)
@@ -22,8 +22,8 @@
   use instead of the default LFS extended file system (ext2/3/4). It also
   provides introductory material on managing disk arrays.</para>
 
-  <!-- <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="ext3.xml"/> -->
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="lvm2.xml"/>
+  <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="aboutlvm.xml"/>
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="jfs.xml"/>
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="mdadm.xml"/>
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="aboutraid.xml"/>

Modified: trunk/BOOK/postlfs/filesystems/lvm2.xml
===================================================================
--- trunk/BOOK/postlfs/filesystems/lvm2.xml	2012-02-17 01:32:24 UTC (rev 9447)
+++ trunk/BOOK/postlfs/filesystems/lvm2.xml	2012-02-17 05:39:57 UTC (rev 9448)
@@ -63,6 +63,25 @@
 
   </sect2>
 
+  <sect2 role="kernel" id='lvm2-kernel'>
+    <title>Kernel Configuration</title>
+
+    <para>Enable the following option in the kernel configuration
+    and recompile the kernel:</para>
+
+<screen><literal>Device Drivers --->
+  Multiple devices driver support (RAID and LVM): Y
+    Device mapper support: Y or M
+    Crypt target support: (optional)
+    Snapshot target: (optional)
+    Mirror target: (optional) </literal></screen>
+
+    <indexterm zone="lvm2 lvm2-kernel">
+      <primary sortas="d-lvm2">lvm2</primary>
+    </indexterm>
+
+  </sect2>
+
   <sect2 role="installation">
     <title>Installation of lvm2</title>
 

Modified: trunk/bootscripts/Makefile
===================================================================
--- trunk/bootscripts/Makefile	2012-02-17 01:32:24 UTC (rev 9447)
+++ trunk/bootscripts/Makefile	2012-02-17 05:39:57 UTC (rev 9448)
@@ -5,10 +5,9 @@
 DIRMODE=755
 CONFMODE=644
 
-# The grep can probably be improved upon.
 all:
 	@grep "^install" Makefile | cut -d ":" -f 1
-	@echo "Select an appropriate install target from the above list" ; exit 1
+	@echo "Select an appropriate install target from the above list" 
 
 create-dirs:
 	install -d -m ${DIRMODE} ${EXTDIR}/rc.d/rc{0,1,2,3,4,5,6,S}.d

Modified: trunk/bootscripts/blfs/init.d/ntpd
===================================================================
--- trunk/bootscripts/blfs/init.d/ntpd	2012-02-17 01:32:24 UTC (rev 9447)
+++ trunk/bootscripts/blfs/init.d/ntpd	2012-02-17 05:39:57 UTC (rev 9448)
@@ -32,7 +32,7 @@
 case "$1" in
    start)
       log_info_msg "Starting ntpd..."
-      start_daemon /usr/sbin/ntpd -gx
+      start_daemon /usr/sbin/ntpd -g
       evaluate_retval
       ;;
 

Modified: trunk/bootscripts/blfs/services/bridge
===================================================================
--- trunk/bootscripts/blfs/services/bridge	2012-02-17 01:32:24 UTC (rev 9447)
+++ trunk/bootscripts/blfs/services/bridge	2012-02-17 05:39:57 UTC (rev 9448)
@@ -5,6 +5,7 @@
 # Description : Bridge Boot Script
 #
 # Authors     : Nathan Coulson - nathan at linuxfromscratch.org
+#               Troy Wu - troy at linuxfromscratch.org
 #               Bruce Dubbs - bdubbs at linuxfromscratch.org
 #
 # Version     : LFS-7.0




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