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Add 4.0 release notes
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Ian Barwick
@@ -1,4 +1,8 @@
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<appendix id="appendix-faq" xreflabel="FAQ">
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<indexterm>
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<primary>FAQ (Frequently Asked Questions)</primary>
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</indexterm>
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<title>FAQ (Frequently Asked Questions)</title>
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<sect1 id="faq-general" xreflabel="General">
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doc/appendix-release-notes.sgml
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doc/appendix-release-notes.sgml
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<appendix id="appendix-release-notes" xreflabel="Release notes">
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<title>Release notes</title>
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<indexterm>
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<primary>Release notes</primary>
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</indexterm>
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<para>
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Changes to each &repmgr; release are documented in the release notes.
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Please read the release notes for all versions between
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your current version and the version you are plan to upgrade to
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before performing an upgrade, as there may be version-specific upgrade steps.
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</para>
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<para>
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See also: <xref linkend="upgrading-repmgr">
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</para>
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<sect1 id="release-4.0">
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<title>Release 4.0beta1</title>
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<para><emphasis>Thu Oct 5, 2017</emphasis></para>
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<para>
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repmgr 4.0 is an entirely new version of &repmgr;, providing many
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improvements together with some changes in the way it works.
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In particular changes have been made to some configuration file
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settings and command line options for consistency and clarity.
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</para>
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<para>
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For detailed instructions on upgrading from repmgr 3.x, see
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<xref linkend="upgrading-from-repmgr-3">.
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</para>
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<sect2>
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<title>New command line options</title>
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<para>
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<itemizedlist>
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<listitem><para>
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<literal>--dry-run</literal>: &repmgr; will attempt to perform
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the action as far as possible without making any changes to the
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database
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</para></listitem>
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<listitem>
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<para>
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<literal>--upstream-node-id</literal>: use to specify the upstream node
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the standby will connect later stream from, when <link linkend="repmgr-standby-clone">cloning</link>
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and <link linkend="repmgr-standby-register">registering</link> a standby.
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</para>
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<para>
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This replaces the configuration file parameter <varname>upstream_node</varname>.
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as the upstream node is set when the standby is initially cloned, but can change
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over the lifetime of an installation (due to failovers, switchovers etc.) so it's
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pointless/confusing keeping the original value around in <filename>repmgr.conf</filename>.
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</para></listitem>
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</itemizedlist>
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</para>
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</sect2>
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<sect2>
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<title>Changed command line options</title>
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<para>
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<application>repmgr</application>
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<itemizedlist>
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<listitem><para>
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<literal>--replication-user</literal> has been deprecated; it has been replaced
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by the configuration file option <varname>replication_user</varname>.
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The value (which defaults to the user provided in the <varname>conninfo</varname>
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string) will be stored in the &repmgr; metadata for use by
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<xref linkend="repmgr-standby-clone"> and <xref linkend="repmgr-standby-follow">.
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</para></listitem>
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<listitem><para>
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<literal>--recovery-min-apply-delay</literal> is now a configuration file parameter
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<varname>recovery_min_apply_delay</varname>, to ensure the setting does not get lost
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when a standby follows a new upstream.
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</para></listitem>
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</itemizedlist>
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</para>
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<para>
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<application>repmgrd</application>
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<itemizedlist>
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<listitem><para>
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<literal>--monitoring-history</literal> is deprecated and is replaced by the
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configuration file option <varname>monitoring_history</varname>.
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This enables the setting to be changed without having to modify system service
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files.
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</para></listitem>
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</itemizedlist>
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</para>
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</sect2>
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<sect2>
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<title>Configuration file changes</title>
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<para><emphasis>Required settings</emphasis></para>
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<para>The following 4 parameters are mandatory in <filename>repmgr.conf</filename>:
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<itemizedlist spacing="compact" mark="bullet">
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<listitem>
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<simpara>node_id</simpara>
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</listitem>
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<listitem>
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<simpara>node_name</simpara>
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</listitem>
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<listitem>
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<simpara>conninfo</simpara>
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</listitem>
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<listitem>
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<simpara>data_directory</simpara>
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</listitem>
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</itemizedlist>
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</para>
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<para><emphasis>Renamed settings</emphasis></para>
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<para>
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Some settings have been renamed for clarity and consistency:
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<itemizedlist spacing="compact" mark="bullet">
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<listitem>
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<simpara><varname>node</varname> is now <varname>node_id</varname></simpara>
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</listitem>
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<listitem>
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<simpara><varname>name</varname> is now <varname>node_name</varname></simpara>
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</listitem>
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<listitem>
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<simpara><varname>master_reponse_timeout</varname> is now
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<varname>async_query_timeout</varname> (to better indicate its purpose)
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</simpara>
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</listitem>
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</itemizedlist>
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</para>
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<para>
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The following configuration file parameters have been renamed for consistency
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with other parameters (and conform to the pattern used by PostgreSQL itself,
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which uses the prefix <varname>log_</varname> for logging parameters):
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<itemizedlist spacing="compact" mark="bullet">
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<listitem>
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<simpara><varname>loglevel</varname> is now <varname>log_level</varname></simpara>
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</listitem>
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<listitem>
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<simpara><varname>logfile</varname> is now <varname>log_file</varname></simpara>
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</listitem>
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<listitem>
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<simpara><varname>logfacility</varname> is now <varname>log_facility</varname></simpara>
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</listitem>
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</itemizedlist>
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</para>
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<para><emphasis>Removed settings</emphasis></para>
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<para>
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<itemizedlist spacing="compact" mark="bullet">
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<listitem>
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<simpara><varname>cluster</varname> has been removed</simpara>
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</listitem>
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<listitem>
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<simpara><varname>upstream_node</varname> - see note about
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<literal>--upstream-node-id</literal> above</simpara>
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</listitem>
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<listitem>
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<simpara><varname>retry_promote_interval_secs</varname>this is now redundant due
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to changes in the failover/promotion mechanism; the new equivalent is
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<varname>primary_notification_timeout</varname> </simpara>
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</listitem>
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</itemizedlist>
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</para>
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<para><emphasis>Logging changes</emphasis></para>
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<para>
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<itemizedlist spacing="compact" mark="bullet">
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<listitem>
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<simpara>
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default value for <varname>log_level</varname> is <literal>INFO</literal>
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rather than <literal>NOTICE</literal>.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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new parameter <varname>log_status_interval</varname>, which causes
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<application>repmgrd</application> to emit a status log
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line at the specified interval
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</simpara>
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</listitem>
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</itemizedlist>
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</para>
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</sect2>
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<sect2>
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<title>repmgrd</title>
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<para>
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The `repmgr` shared library has been renamed from <literal>repmgr_funcs</literal> to
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<literal>repmgr</literal>, meaning <varname>shared_preload_libraries</varname>
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in <filename>postgresql.conf</filename> needs to be updated to the new name:
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<programlisting>
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shared_preload_libraries = 'repmgr'</programlisting>
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</para>
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</sect2>
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</sect1>
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</appendix>
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@@ -71,6 +71,7 @@
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<!ENTITY repmgr-cluster-event SYSTEM "repmgr-cluster-event.sgml">
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<!ENTITY repmgr-cluster-cleanup SYSTEM "repmgr-cluster-cleanup.sgml">
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<!ENTITY appendix-release-notes SYSTEM "appendix-release-notes.sgml">
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<!ENTITY appendix-faq SYSTEM "appendix-faq.sgml">
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<!ENTITY appendix-signatures SYSTEM "appendix-signatures.sgml">
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@@ -109,8 +109,9 @@
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&repmgr-cluster-cleanup;
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</part>
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&appendix-faq;
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&appendix-release-notes;
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&appendix-signatures;
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&appendix-faq;
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<![%include-index;[&bookindex;]]>
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<![%include-xslt-index;[<index id="bookindex"></index>]]>
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@@ -4,5 +4,5 @@ Upgrading from repmgr 3
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This document has been integrated into the main repmgr documentation
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and is now located here:
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http://repmgr.org/docs/upgrading-from-repmgr-3.html
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https://repmgr.org/docs/upgrading-from-repmgr-3.html
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