Changeset 55dc313

Timestamp:

06/29/2020 07:38:45 AM (4 years ago)

Author:

Pierre Labastie <pieere@…>

Branches:

10.0, 10.1, 11.0, 11.1, 11.2, 11.3, 12.0, 12.1, kea, ken/TL2024, ken/inkscape-core-mods, ken/tuningfonts, lazarus, lxqt, plabs/newcss, plabs/python-mods, python3.11, qt5new, rahul/power-profiles-daemon, renodr/vulkan-addition, trunk, upgradedb, xry111/intltool, xry111/llvm18, xry111/soup3, xry111/test-20220226, xry111/xf86-video-removal

Children:

691f4f70

Parents:

c3a210a

Message:

Add instructions to activate and mount lvm volume in systemd. ticket 13730

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@23342 af4574ff-66df-0310-9fd7-8a98e5e911e0

Files:

• introduction/welcome/changelog.xml (modified) (1 diff)
• postlfs/filesystems/aboutlvm.xml (modified) (2 diffs)
• postlfs/filesystems/lvm2.xml (modified) (2 diffs)

introduction/welcome/changelog.xml

@@ -45 +45 @@
       <para>June 29th, 2020</para>
       <itemizedlist>
+        <listitem revision="systemd">
+          <para>[pierre] - Add instructions and informations for mounting lvm
+          volumes at boot with systemd. Fixes
+          <ulink url="&blfs-ticket-root;13730">#13730</ulink>.</para> 
+        </listitem>
         <listitem>
           <para>[renodr] - Update to gtk+-3.24.21. Fixes

postlfs/filesystems/aboutlvm.xml

@@ -134 +134 @@
 mount /dev/lfs-lvm/mysql /srv/mysql</userinput></screen>
 
-  <para>
+  <para revision="sysv">
     The LFS boot scripts automatically make these file systems available to
     the system in the checkfs script. Edit the <filename>/etc/fstab</filename>
@@ -142 +142 @@
   <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.
+    of an initramfs (initial RAM file system). The initramfs proposed in
+    <xref linkend="initramfs"/> allows to pass the lvm volume in
+    the <parameter>root=</parameter> switch of the kernel command line.
   </para>
+
+  <para revision="systemd">
+    If not using an initramfs, there is a race condition in <application>
+    systemd</application> preventing mounting logical volumes through
+    <filename>/etc/fstab</filename>. You must create a <quote>mount</quote>
+    unit (see systemd.mount(5)) as in the following example, which mounts
+    the <filename class="directory">/home</filename> directory automatically
+    at boot:
+  </para>
+
+<screen role="root" revision="systemd"><userinput>cat &gt; /etc/systemd/system/home.mount &lt;&lt; EOF
+<literal>[Unit]
+Description=Mount the lvm volume /dev/lfs-lvm/home to /home
+
+[Mount]
+What=/dev/lfs-lvm/home
+Where=/home
+Type=ext4
+Options=default
+
+[Install]
+WantedBy=multi-user.target</literal>
+EOF</userinput></screen>
+
+  <note revision="systemd">
+    <para>
+    The name of the unit must be the name of the mount point with the
+    `/' character replaced by `-', omitting the leading one.
+    </para>
+  </note>
+
+  <para revision="systemd">
+    Next the unit must be enabled with:
+  </para>
+
+<screen role="root" revision="systemd"><userinput>systemctl enable home.mount</userinput></screen>
 
   <para>

postlfs/filesystems/lvm2.xml

@@ -230 +230 @@
     </para>
 
-<screen role="root"><userinput>make install</userinput></screen>
+<screen role="root" revision="sysv"><userinput>make install</userinput></screen>
+
+<screen role="root" revision="systemd"><userinput>make install
+make install_systemd_units</userinput></screen>
 
   </sect2>
@@ -265 +268 @@
       building of the <application>Device Mapper</application>
       event daemon.
+    </para>
+
+    <para revision="systemd">
+      <command>make install_systemd_units</command>: This is needed to install
+      a unit that activates logical volumes at boot. It is not installed
+      by default.
     </para>