doc: Improve CentOS package-related documentation

doc/appendix-packages.sgml

@@ -32,6 +32,51 @@
       Note these &repmgr; RPM packages are not designed to work with SuSE/OpenSuSE.
     </para>
 
+    <sect2 id="packages-centos-repositories">
+      <title>CentOS repositories</title>
+
+      <para>
+        &repmgr; packages are available from the 2ndQuadrant repository, and also the PostgreSQL
+        community repository. The 2ndQuadrant repository is updated immediately after each
+        &repmgr; release.
+      </para>
+
+      <table id="centos-2ndquadrant-repository">
+        <title>2ndQuadrant repository</title>
+        <tgroup cols="2">
+          <tbody>
+            <row>
+              <entry>Repository URL:</entry>
+              <entry><ulink url="http://packages.2ndquadrant.com/repmgr/">http://packages.2ndquadrant.com/repmgr/</ulink></entry>
+            </row>
+            <row>
+              <entry>Repository documentation:</entry>
+              <entry><ulink url="https://repmgr.org/docs/4.0/installation-packages.html#INSTALLATION-PACKAGES-REDHAT-2NDQ">https://repmgr.org/docs/4.0/installation-packages.html#INSTALLATION-PACKAGES-REDHAT-2NDQ</ulink></entry>
+            </row>
+          </tbody>
+        </tgroup>
+      </table>
+
+      <table id="centos-pgdg-repository">
+        <title>PostgreSQL community repository (PGDG)</title>
+        <tgroup cols="2">
+          <tbody>
+            <row>
+              <entry>Repository URL:</entry>
+              <entry><ulink url="https://yum.postgresql.org/repopackages.php">https://yum.postgresql.org/repopackages.php</ulink></entry>
+            </row>
+            <row>
+              <entry>Repository documentation:</entry>
+              <entry><ulink url="https://yum.postgresql.org/">https://yum.postgresql.org/</ulink></entry>
+            </row>
+          </tbody>
+        </tgroup>
+      </table>
+
+    </sect2>
+
+    <sect2 id="packages-centos-details">
+      <title>CentOS package details</title>
 
       <para>
         The two tables below list relevant information, paths, commands etc. for the &repmgr; packages on
@@ -59,15 +104,6 @@
 
    <tgroup cols="2">
     <tbody>
-     <row>
-      <entry>Repository URL:</entry>
-      <entry><ulink url="https://yum.postgresql.org/repopackages.php">https://yum.postgresql.org/repopackages.php</ulink></entry>
-     </row>
-
-     <row>
-      <entry>Repository documentation:</entry>
-      <entry><ulink url="https://yum.postgresql.org/">https://yum.postgresql.org/</ulink></entry>
-     </row>
 
      <row>
       <entry>Package name example:</entry>
@@ -128,15 +164,6 @@
 
    <tgroup cols="2">
     <tbody>
-     <row>
-      <entry>Repository URL:</entry>
-      <entry><ulink url="https://yum.postgresql.org/repopackages.php">https://yum.postgresql.org/repopackages.php</ulink></entry>
-     </row>
-
-     <row>
-      <entry>Repository documentation:</entry>
-      <entry><ulink url="https://yum.postgresql.org/">https://yum.postgresql.org/</ulink></entry>
-     </row>
 
      <row>
       <entry>Package name example:</entry>
@@ -192,6 +219,6 @@
    </tgroup>
   </table>
 
-
+    </sect2>
  </sect1>
 </appendix>

doc/install-packages.sgml

@@ -9,7 +9,7 @@
 
   <indexterm>
    <primary>installation</primary>
-   <secondary>on Redhat/CentOS/Fedora etc.</secondary>
+   <secondary>on Red Hat/CentOS/Fedora etc.</secondary>
   </indexterm>
 
   <title>RedHat/Fedora/CentOS</title>
@@ -26,6 +26,11 @@
    at the same time as each &repmgr; release, as it can take some days for
    them to become available via the main PGDG repository. See following section for details:
   </para>
+  <para>
+    For more information on the package contents, including details of installation
+    paths and relevant <link linkend="configuration-service-commands">service commands</link>,
+    see the appendix section <xref linkend="packages-centos">.
+  </para>
 
 
   <sect3 id="installation-packages-redhat-2ndq">