document cluster verify --no-nsplus1-mem option

[ganeti-local] / man / gnt-cluster.sgml

diff --git a/man/gnt-cluster.sgml b/man/gnt-cluster.sgml
index 4c55449..3af3978 100644 (file)
--- a/man/gnt-cluster.sgml
+++ b/man/gnt-cluster.sgml
@@ -102,6 +102,21 @@
       </para>
 
       <para>
+        The command is executed serially on the selected nodes. If the
+        master node is present in the list, the command will be
+        executed last on the master. Regarding the other nodes, the
+        execution order is somewhat alphabetic (it's smarter so that
+        node2.example.com will be earlier than node10.example.com but
+        after node1.example.com).
+      </para>
+
+      <para>
+        So given the node names node1, node2, node3, node10, node11,
+        with node3 being the master, the order will be: node1, node2,
+        node10, node11, node3.
+      </para>
+
+      <para>
         The command is constructed by concatenating all other command
         line arguments. For example, to list the contents of the
         <filename class="directory">/etc</filename> directory on all
@@ -199,6 +214,7 @@
         <arg>-g <replaceable>vg-name</replaceable></arg>
         <arg>--master-netdev <replaceable>vg-name</replaceable></arg>
         <arg>-m <replaceable>mac-prefix</replaceable></arg>
+        <arg>--no-lvm-storage</arg>
         <arg choice="req"><replaceable>clustername</replaceable></arg>
       </cmdsynopsis>
 
@@ -255,8 +271,13 @@
 
       <para>
         The <option>-g</option> option will let you specify a volume group
-        different than xenvg for ganeti to use when creating instance disks.
-        This volume group must have the same name on all nodes.
+        different than 'xenvg' for ganeti to use when creating instance disks.
+        This volume group must have the same name on all nodes. Once the
+        cluster is initialized this can be altered by using the
+        <command>modify</command> command. If you don't want to use lvm
+        storage at all use the <option>--no-lvm-storage</option> option.
+        Once the cluster is initialized you can change this setup with the
+        <command>modify</command> command.
       </para>
 
       <para>
@@ -273,6 +294,13 @@
         default is aa:00:00.
       </para>
 
+      <para>
+        The <option>--no-lvm-storage</option> allows you to initialize the
+        cluster without lvm support. This means that only instances using
+        files as storage backend will be possible to create. Once the cluster
+        is initialized you can change this setup with the
+        <command>modify</command> command.
+      </para>
     </refsect2>
 
     <refsect2>
@@ -298,6 +326,25 @@
     </refsect2>
 
     <refsect2>
+      <title>MODIFY</title>
+
+      <cmdsynopsis>
+        <command>modify</command>
+        <arg choice="opt">-g <replaceable>vg-name</replaceable></arg>
+        <arg choice="opt">--no-lvm-storage</arg>
+      </cmdsynopsis>
+
+        <para>
+          Modify the options for the cluster.
+        </para>
+
+        <para>
+          The <option>-g</option> and <option>--no-lvm-stoarge</option> are
+          described in the <command>init</command> command.
+        </para>
+    </refsect2>
+
+    <refsect2>
       <title>REMOVE-TAGS</title>
 
       <cmdsynopsis>
@@ -385,6 +432,7 @@
 
       <cmdsynopsis>
         <command>verify</command>
+        <arg choice="opt">--no-nplus1-mem</arg>
       </cmdsynopsis>
 
       <para>
@@ -392,6 +440,12 @@
         respect to running instances, and incurs no downtime of the
         instances.
       </para>
+
+      <para>
+        If the <option>--no-nplus1-mem</option> option is given, ganeti won't
+        check whether if it loses a node it can restart all the instances on
+        their secondaries (and report an error otherwise).
+      </para>
     </refsect2>
 
     <refsect2>