1 | <?xml version="1.0" encoding="UTF-8"?>
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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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7 | <!ENTITY autofs-download-http "&kernel-dl;/linux/daemons/autofs/v5/autofs-&autofs-version;.tar.xz">
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8 | <!ENTITY autofs-download-ftp " ">
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9 | <!ENTITY autofs-md5sum "06fb59a03c82364a0d788435b6853d70">
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10 | <!ENTITY autofs-size "328 KB">
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11 | <!ENTITY autofs-buildsize "5.7 MB">
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12 | <!ENTITY autofs-time "less than 0.1 SBU">
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13 | ]>
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14 |
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15 | <sect1 id="autofs" xreflabel="Autofs-&autofs-version;">
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16 | <?dbhtml filename="autofs.html"?>
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17 |
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18 |
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19 | <title>autofs-&autofs-version;</title>
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20 |
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21 | <indexterm zone="autofs">
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22 | <primary sortas="a-Autofs">Autofs</primary>
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23 | </indexterm>
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24 |
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25 | <sect2 role="package">
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26 | <title>Introduction to Autofs</title>
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27 |
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28 | <para>
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29 | <application>Autofs</application> controls the operation of the automount
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30 | daemons. The automount daemons automatically mount filesystems when they
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31 | are accessed and unmount them after a period of inactivity. This is done
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32 | based on a set of pre-configured maps.
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33 | </para>
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34 |
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35 | &lfs122_checked;
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36 |
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37 | <bridgehead renderas="sect3">Package Information</bridgehead>
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38 | <itemizedlist spacing="compact">
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39 | <listitem>
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40 | <para>
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41 | Download (HTTP): <ulink url="&autofs-download-http;"/>
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42 | </para>
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43 | </listitem>
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44 | <listitem>
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45 | <para>
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46 | Download (FTP): <ulink url="&autofs-download-ftp;"/>
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47 | </para>
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48 | </listitem>
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49 | <listitem>
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50 | <para>
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51 | Download MD5 sum: &autofs-md5sum;
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52 | </para>
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53 | </listitem>
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54 | <listitem>
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55 | <para>
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56 | Download size: &autofs-size;
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57 | </para>
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58 | </listitem>
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59 | <listitem>
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60 | <para>
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61 | Estimated disk space required: &autofs-buildsize;
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62 | </para>
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63 | </listitem>
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64 | <listitem>
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65 | <para>
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66 | Estimated build time: &autofs-time;
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67 | </para>
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68 | </listitem>
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69 | </itemizedlist>
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70 |
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71 | <bridgehead renderas="sect3">Autofs Dependencies</bridgehead>
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72 |
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73 | <bridgehead renderas="sect4">Required</bridgehead>
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74 | <para role="required">
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75 | <xref linkend="libtirpc"/> and
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76 | <xref linkend="rpcsvc-proto"/>
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77 | </para>
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78 |
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79 | <bridgehead renderas="sect4">Optional</bridgehead>
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80 | <para role="optional">
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81 | <xref linkend="nfs-utils"/>,
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82 | <xref linkend="libnsl"/>,
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83 | <xref linkend="libxml2"/>,
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84 | <xref linkend="mitkrb"/>,
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85 | <xref linkend="openldap"/> (client only), and
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86 | <xref linkend="cyrus-sasl"/>
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87 | </para>
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88 |
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89 | </sect2>
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90 |
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91 | <sect2 role="kernel" id="autofs-kernel">
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92 | <title>Kernel Configuration</title>
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93 |
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94 | <indexterm zone="autofs autofs-kernel">
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95 | <primary sortas="d-Automounter">Automounter</primary>
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96 | </indexterm>
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97 |
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98 | <para>
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99 | Verify that automounter kernel support has been enabled:
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100 | </para>
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101 |
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102 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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103 | href="autofs-kernel.xml"/>
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104 |
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105 | <para>
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106 | Optionally, enable the following options in the kernel configuration:
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107 | </para>
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108 |
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109 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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110 | href="autofs-optional-kernel.xml"/>
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111 |
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112 | <para>
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113 | Recompile and install the new kernel, if necessary.
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114 | </para>
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115 |
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116 | </sect2>
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117 |
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118 | <sect2 role="installation">
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119 |
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120 | <title>Installation of Autofs</title>
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121 | <!--
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122 | <para>
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123 | First fix an issue introduced by glibc-2.36:
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124 | </para>
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125 |
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126 | <screen><userinput>grep -rl linux/fs modules | xargs sed -i "/linux\/fs/d"</userinput></screen>
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127 | -->
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128 | <para>
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129 | Install <application>Autofs</application> by running the following
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130 | commands:
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131 | </para>
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132 |
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133 | <screen revision="sysv"><userinput>./configure --prefix=/usr \
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134 | --with-mapdir=/etc/autofs \
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135 | --with-libtirpc \
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136 | --without-openldap \
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137 | --mandir=/usr/share/man &&
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138 | make</userinput></screen>
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139 |
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140 | <screen revision="systemd"><userinput>./configure --prefix=/usr \
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141 | --with-mapdir=/etc/autofs \
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142 | --with-libtirpc \
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143 | --with-systemd \
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144 | --without-openldap \
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145 | --mandir=/usr/share/man &&
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146 | make</userinput></screen>
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147 |
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148 | <para>
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149 | This package does not come with a test suite.
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150 | </para>
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151 |
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152 | <para>
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153 | Now, as the <systemitem class="username">root</systemitem> user:
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154 | </para>
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155 |
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156 | <screen role="root"><userinput>make install</userinput></screen>
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157 |
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158 | <!-- As of version 5.1.5, the configuration files are not installed anymore -->
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159 | <caution>
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160 | <para>
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161 | If <application>autofs</application> is already installed on your
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162 | system, be sure to backup your configuration files. They'll be
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163 | overwritten by the following command.
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164 | </para>
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165 | </caution>
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166 |
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167 | <para>
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168 | Install the default configuration files, still as the
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169 | <systemitem class="username">root</systemitem> user:
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170 | </para>
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171 |
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172 | <screen role="root"><userinput>make install_samples</userinput></screen>
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173 |
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174 | </sect2>
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175 |
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176 | <sect2 role="commands">
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177 | <title>Command Explanations</title>
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178 |
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179 | <para>
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180 | <parameter>--with-libtirpc</parameter>: This switch forces the package to
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181 | use libtirpc for RPC functionality instead of relying on implementation
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182 | from Glibc, which was removed in LFS 8.1.
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183 | </para>
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184 |
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185 | <para revision="systemd">
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186 | <parameter>--with-systemd</parameter>: This switch enables installation
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187 | of the bundled systemd units.
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188 | </para>
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189 |
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190 | <para>
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191 | <parameter>--without-openldap</parameter>: This switch disables openldap
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192 | if found. If openldap is desired, omit this switch. Note that openldap
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193 | support in autofs requires <xref linkend="mitkrb"/>.
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194 | </para>
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195 |
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196 | </sect2>
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197 |
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198 | <sect2 role="configuration">
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199 | <title>Configuring Autofs</title>
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200 |
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201 | <sect3 id="autofs-config">
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202 | <title>Config Files</title>
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203 |
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204 | <para>
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205 | <filename>/etc/sysconfig/autofs.conf</filename>,
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206 | <filename>/etc/autofs/auto.master</filename>,
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207 | <filename>/etc/autofs/auto.misc</filename>, and
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208 | <filename>/etc/autofs/auto.net</filename>
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209 | </para>
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210 |
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211 | <indexterm zone="autofs autofs-config" >
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212 | <primary sortas="e-etc-sysconfig-autofs.conf">/etc/sysconfig/autofs.conf</primary>
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213 | </indexterm>
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214 |
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215 | <indexterm zone="autofs autofs-config">
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216 | <primary sortas="e-etc-auto.master">/etc/autofs/auto.master</primary>
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217 | </indexterm>
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218 |
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219 | <indexterm zone="autofs autofs-config">
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220 | <primary sortas="e-etc-auto.misc">/etc/autofs/auto.misc</primary>
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221 | </indexterm>
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222 |
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223 | <indexterm zone="autofs autofs-config">
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224 | <primary sortas="e-etc-auto.net">/etc/autofs/auto.net</primary>
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225 | </indexterm>
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226 |
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227 | </sect3>
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228 |
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229 | <sect3>
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230 | <title>Configuration Information</title>
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231 |
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232 | <para>
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233 | The installation process creates <filename>auto.master</filename>,
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234 | <filename>auto.misc</filename>, <filename>auto.smb</filename>, and
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235 | <filename>auto.net</filename>. Replace the
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236 | <filename>auto.master</filename> file with the following commands
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237 | as the <systemitem class="username">root</systemitem> user:
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238 | </para>
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239 |
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240 | <screen role="root"><userinput>mv /etc/autofs/auto.master /etc/autofs/auto.master.bak &&
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241 | cat > /etc/autofs/auto.master << "EOF"
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242 | <literal># Begin /etc/autofs/auto.master
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243 |
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244 | /media/auto /etc/autofs/auto.misc --ghost
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245 | #/home /etc/autofs/auto.home
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246 |
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247 | # End /etc/autofs/auto.master</literal>
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248 | EOF</userinput></screen>
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249 |
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250 | <para>
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251 | This file creates a new media directory,
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252 | <filename>/media/auto</filename> that will overlay any existing
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253 | directory of the same name. In this example, the file,
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254 | <filename>/etc/autofs/auto.misc</filename>, has a line:
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255 | </para>
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256 |
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257 | <screen>cd -fstype=iso9660,ro,nosuid,nodev :/dev/cdrom</screen>
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258 |
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259 | <para>
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260 | that will mount a cdrom as <filename>/media/auto/cd</filename> if
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261 | that directory is accessed. The <option>--ghost</option> option tells
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262 | the automounter to create <quote>ghost</quote> versions (i.e. empty
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263 | directories) of all the mount points listed in the configuration file
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264 | regardless whether any of the file systems are actually mounted or not.
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265 | This is very convenient and highly recommended, because it will show
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266 | you the available auto-mountable file systems as existing directories,
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267 | even when their file systems aren't currently mounted. Without the
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268 | <option>--ghost</option> option, you'll have to remember the names of
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269 | the directories. As soon as you try to access one of them, the
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270 | directory will be created and the file system will be mounted. When
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271 | the file system gets unmounted again, the directory is destroyed too,
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272 | unless the <option>--ghost</option> option was given.
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273 | </para>
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274 |
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275 | <note>
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276 | <para>
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277 | An alternative method would be to specify another automount
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278 | location such as <filename
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279 | class='directory'>/var/lib/auto/cdrom</filename> and create a
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280 | symbolic link from <filename
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281 | class='directory'>/media/cdrom</filename> to the automount location.
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282 | </para>
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283 | </note>
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284 |
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285 | <para>
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286 | The <filename>auto.misc</filename> file must be configured to your
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287 | working hardware. The loaded configuration file should load your cdrom
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288 | if <filename>/dev/cdrom</filename> is active or it can be edited to
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289 | match your device setup. Examples for floppies are available in the
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290 | file and easily activated. Documentation for this file is available
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291 | using the <command>man 5 autofs</command> command.
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292 | </para>
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293 |
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294 | <para>
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295 | In the second line, if enabled, a user's home directory would be
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296 | mounted via NFS upon login. The <filename>/etc/home.auto</filename>
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297 | would need to exist and have an entry similar to:
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298 | </para>
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299 |
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300 | <screen>joe example.org:/export/home/joe</screen>
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301 |
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302 | <para>
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303 | where the directory <filename>/export/home/joe</filename> is
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304 | exported via NFS from the system example.org. NFS shares
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305 | are covered on the next page.
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306 | </para>
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307 |
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308 | <para>
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309 | This package could also be used to mount SMB shares, however that
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310 | feature is not configured in these instructions. For additional
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311 | configuration information, see the man pages for
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312 | <ulink role='man' url='&man;auto.master.5'>auto.master(5)</ulink>.
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313 | There are also web resources such as this <ulink
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314 | url='https://wiki.gentoo.org/wiki/AutoFS'>AUTOFS
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315 | HOWTO</ulink> available.
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316 | </para>
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317 |
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318 | </sect3>
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319 |
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320 | <sect3 id="autofs-init">
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321 | <title><phrase revision="sysv">Boot Script</phrase>
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322 | <phrase revision="systemd">Systemd Unit</phrase></title>
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323 |
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324 | <para revision="sysv">
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325 | <application>autofs</application> installs its own
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326 | boot script, but it has no capability for logging or visual conformance
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327 | with other BLFS scripts. It will be replaced by an enhanced version.
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328 | </para>
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329 |
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330 | <para revision="sysv">
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331 | Install the <filename>/etc/init.d/autofs</filename>
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332 | mount script included with the <xref linkend="bootscripts"/>
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333 | package.
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334 | </para>
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335 |
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336 | <para revision="systemd">
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337 | To start <application>Autofs</application> at boot, enable the
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338 | previously installed systemd unit by running the following command as
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339 | the <systemitem class="username">root</systemitem> user:
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340 | </para>
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341 |
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342 | <indexterm zone="autofs autofs-init">
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343 | <primary sortas="f-autofs-init">autofs</primary>
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344 | </indexterm>
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345 |
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346 | <screen role="root" revision="sysv"><userinput>make install-autofs</userinput></screen>
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347 |
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348 | <screen role="root" revision="systemd"><userinput>systemctl enable autofs</userinput></screen>
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349 |
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350 | <para revision="sysv">
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351 | The time-out variable is set in
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352 | <filename>/etc/sysconfig/autofs.conf</filename>. The installed file sets
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353 | a default of 60 seconds of inactivity before unmounting the device. A
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354 | much shorter time may be necessary to protect buffer writing to a floppy
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355 | if users tend to remove the media prior to the timeout setting.
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356 | </para>
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357 |
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358 | <note revision="systemd">
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359 | <para>
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360 | You can also specify <envar>OPTIONS</envar> variable in the
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361 | <filename>/etc/sysconfig/autofs</filename> file with any additional
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362 | parameters that you might want to pass to the automount daemon.
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363 | </para>
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364 | </note>
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365 |
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366 | </sect3>
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367 |
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368 | </sect2>
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369 |
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370 | <sect2 role="content">
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371 | <title>Contents</title>
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372 |
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373 | <segmentedlist>
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374 | <segtitle>Installed Program</segtitle>
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375 | <segtitle>Installed Libraries</segtitle>
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376 | <segtitle>Installed Directories</segtitle>
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377 |
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378 | <seglistitem>
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379 | <seg>automount</seg>
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380 | <seg>
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381 | libautofs.so.
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382 | lookup_dir.so,
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383 | lookup_file.so,
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384 | lookup_files.so (symlink to lookup_file.so),
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385 | lookup_hosts.so,
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386 | lookup_ldap.so (optional),
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387 | lookup_multi.so,
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388 | lookup_nis.so (symlink to lookup_yp.so),
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389 | lookup_program.so,
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390 | lookup_userhome.so,
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391 | lookup_yp.so,
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392 | mount_afs.so,
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393 | mount_autofs.so,
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394 | mount_bind.so,
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395 | mount_changer.so,
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396 | mount_ext2.so,
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397 | mount_ext3.so (symlink to mount_ext2.so),
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398 | mount_ext4.so (symlink to mount_ext2.so),
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399 | mount_generic.so,
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400 | mount_nfs.so,
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401 | mount_nfs4.so (symlink to mount_nfs.so),
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402 | parse_amd.so, and
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403 | parse_sun.so
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404 | </seg>
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405 | <seg>
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406 | /usr/lib/autofs and
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407 | /etc/autofs
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408 | </seg>
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409 | </seglistitem>
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410 | </segmentedlist>
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411 |
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412 | <variablelist>
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413 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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414 | <?dbfo list-presentation="list"?>
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415 | <?dbhtml list-presentation="table"?>
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416 |
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417 | <varlistentry id="automount">
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418 | <term><command>automount</command></term>
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419 | <listitem>
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420 | <para>
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421 | is the daemon that performs the mounting when a request is
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422 | made for the device
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423 | </para>
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424 | <indexterm zone="autofs automount">
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425 | <primary sortas="b-automount">automount</primary>
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426 | </indexterm>
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427 | </listitem>
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428 | </varlistentry>
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429 |
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430 | </variablelist>
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431 |
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432 | </sect2>
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433 |
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434 | </sect1>
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