[5046] Added documentation to the admin guide for set-config

doc/guide/ctrl-channel.xml

@@ -161,6 +161,65 @@ will be sent to Kea and the responses received from Kea printed to standard outp
       </para>
     </section> <!-- end of command-list-commands -->
 
+    <section id="command-set-config">
+      <title>set-config</title>
+
+      <para>
+    The <emphasis>set-config</emphasis> command instructs the server to replace
+    its current configuration with the new configuration supplied in the
+    command's arguments. The supplied configuration is expected to be the full
+    configuration for the target server along with an optional Logger
+    configuration.  While optional, the Logger configuration is highly
+    recommended as without it the server will revert to its default logging
+    configuration. The structure of the command is as follows:
+      </para>
+<screen>
+{
+    "command": "set-config",
+    "arguments":  {
+        "&#60;server&#62;": {
+        },
+        "Logging": {
+        }
+     }
+}
+</screen>
+      <para>
+    where &#60;server&#62; is the configuration element name for a given server
+    such as "Dhcp4" or "Dhcp6".  For example:
+      </para>
+<screen>
+{
+    "command": "set-config",
+    "arguments":  {
+        "Dhcp6": {
+            :
+        },
+        "Logging": {
+            :
+        }
+     }
+}
+</screen>
+      <para>
+    If the new configuration proves to be invalid the server will retain
+    its current configuration.  Please note that the new configuration is
+    retained in memory only.  If the server is restarted or a configuration
+    reload is triggered via a signal, the server will use the configuration
+    stored in its configuration file.
+
+	The server's response will contain a numeric code, "result" (0 for success,
+    non-zero on failure), and  a string, "text", describing the outcome:
+<screen>
+    {"result": 0, "text": "Configuration successful." }
+
+    or
+
+    {"result": 1, "text": "unsupported parameter: BOGUS (&#60;string&#62;:16:26)" }
+</screen>
+      </para>
+    </section> <!-- end of command-set-config -->
+
     <section id="command-shutdown">
       <title>shutdown</title>
 
@@ -182,6 +241,8 @@ will be sent to Kea and the responses received from Kea printed to standard outp
       </para>
     </section> <!-- end of command-shutdown -->
 
+
+
     </section> <!-- end of commands supported by both servers -->
 
   </chapter>

doc/guide/dhcp4-srv.xml

@@ -3659,17 +3659,30 @@ src/lib/dhcpsrv/cfg_host_operations.cc -->
 
       <para>
         Communication over control channel is conducted using JSON structures.
-        See the Control Channel section in the Kea Developer's Guide for more details.
+        See the Control Channel section in the Kea Developer's Guide for more
+        details.
+      </para>
+
+      <para>The DHCPv4 server supports the following operational commands:
+        <itemizedlist>
+            <listitem>leases-reclaim</listitem>
+            <listitem>list-commands</listitem>
+            <listitem>set-config</listitem>
+            <listitem>shutdown</listitem>
+        </itemizedlist>
+         as described in <xref linkend="commands-common"/>.  In addition,
+         it supports the following statistics related commands:
+        <itemizedlist>
+            <listitem>statistic-get</listitem>
+            <listitem> statistic-reset</listitem>
+            <listitem>statistic-remove</listitem>
+            <listitem>statistic-get-all</listitem>
+            <listitem>statistic-reset-all</listitem>
+            <listitem>statistic-remove-all</listitem>
+        </itemizedlist>
+        as described here <xref linkend="command-stats"/>.
       </para>
 
-      <para>The DHCPv4 server supports <command>statistic-get</command>,
-      <command>statistic-reset</command>, <command>statistic-remove</command>,
-      <command>statistic-get-all</command>, <command>statistic-reset-all</command>
-      and <command>statistic-remove-all</command>, specified in
-      <xref linkend="command-stats"/>. It also supports
-      <command>list-commands</command> and <command>shutdown</command>,
-      specified in <xref linkend="command-list-commands" /> and
-      <xref linkend="command-shutdown" />, respectively.</para>
     </section>
 
     <section id="dhcp4-std">

doc/guide/dhcp6-srv.xml

@@ -4067,16 +4067,27 @@ If not specified, the default value is:
         See the Control Channel section in the Kea Developer's Guide for more details.
       </para>
 
-      <para>The DHCPv6 server supports <command>statistic-get</command>,
-      <command>statistic-reset</command>, <command>statistic-remove</command>,
-      <command>statistic-get-all</command>, <command>statistic-reset-all</command>
-      and <command>statistic-remove-all</command>, specified in
-      <xref linkend="command-stats"/>. It also supports
-      <command>list-commands</command> and <command>shutdown</command>,
-      specified in <xref linkend="command-list-commands" /> and
-      <xref linkend="command-shutdown" />, respectively.</para>
-    </section>
+      <para>The DHCPv6 server supports the following operational commands:
+        <itemizedlist>
+            <listitem>leases-reclaim</listitem>
+            <listitem>list-commands</listitem>
+            <listitem>set-config</listitem>
+            <listitem>shutdown</listitem>
+        </itemizedlist>
+         as described in <xref linkend="commands-common"/>.  In addition,
+         it supports the following statistics related commands:
+        <itemizedlist>
+            <listitem>statistic-get</listitem>
+            <listitem> statistic-reset</listitem>
+            <listitem>statistic-remove</listitem>
+            <listitem>statistic-get-all</listitem>
+            <listitem>statistic-reset-all</listitem>
+            <listitem>statistic-remove-all</listitem>
+        </itemizedlist>
+        as described here <xref linkend="command-stats"/>.
+      </para>
 
+    </section>
 
       <section>
         <title>User context in IPv6 pools</title>