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246 lines
7.5 KiB
XML
246 lines
7.5 KiB
XML
<sect1 id="install-requirements" xreflabel="installation requirements">
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<title>Requirements for installing repmgr</title>
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<indexterm>
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<primary>installation</primary>
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<secondary>requirements</secondary>
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</indexterm>
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<para>
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repmgr is developed and tested on Linux and OS X, but should work on any
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UNIX-like system supported by PostgreSQL itself. There is no support for
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Microsoft Windows.
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</para>
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<para>
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&repmgr; &repmgrversion; is compatible with all PostgreSQL versions from 9.3. See
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section <link linkend="install-compatibility-matrix">&repmgr; compatibility matrix</link>
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for an overview of version compatibility.
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</para>
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<note>
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<simpara>
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If upgrading from &repmgr; 3.x, please see the section <xref linkend="upgrading-from-repmgr-3"/>.
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</simpara>
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</note>
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<para>
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All servers in the replication cluster must be running the same major version of
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PostgreSQL, and we recommend that they also run the same minor version.
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</para>
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<para>
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&repmgr; must be installed on each server in the replication cluster.
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If installing repmgr from packages, the package version must match the PostgreSQL
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version. If installing from source, &repmgr; must be compiled against the same
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major version.
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</para>
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<note>
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<simpara>
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The same "major" &repmgr; version (e.g. <literal>&repmgrversion;.x</literal>) <emphasis>must</emphasis>
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be installed on all node in the replication cluster. We strongly recommend keeping all
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nodes on the same (preferably latest) "minor" &repmgr; version to minimize the risk
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of incompatibilities.
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</simpara>
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<simpara>
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If different "major" &repmgr; versions (e.g. 4.1.x and &repmgrversion;.x)
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are installed on different nodes, in the best case &repmgr; (in particular &repmgrd;)
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will not run. In the worst case, you will end up with a broken cluster.
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</simpara>
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</note>
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<para>
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A dedicated system user for &repmgr; is <emphasis>not</emphasis> required; as many &repmgr; and
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&repmgrd; actions require direct access to the PostgreSQL data directory,
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these commands should be executed by the <literal>postgres</literal> user.
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</para>
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<para>
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See also <link linkend="configuration-prerequisites">Prerequisites for configuration</link>
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for information on networking requirements.
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</para>
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<tip>
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<simpara>
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We recommend using a session multiplexer utility such as <command>screen</command> or
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<command>tmux</command> when performing long-running actions (such as cloning a database)
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on a remote server - this will ensure the &repmgr; action won't be prematurely
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terminated if your <command>ssh</command> session to the server is interrupted or closed.
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</simpara>
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</tip>
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<sect2 id="install-compatibility-matrix">
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<title>&repmgr; compatibility matrix</title>
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<indexterm>
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<primary>repmgr</primary>
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<secondary>compatibility matrix</secondary>
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</indexterm>
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<indexterm>
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<primary>compatibility matrix</primary>
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</indexterm>
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<para>
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The following table provides an overview of which &repmgr; version supports
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which PostgreSQL version.
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</para>
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<table id="repmgr-compatibility-matrix">
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<title>&repmgr; compatibility matrix</title>
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<tgroup cols="3">
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<thead>
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<row>
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<entry>
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&repmgr; version
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</entry>
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<entry>
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Supported?
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</entry>
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<entry>
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Latest release
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</entry>
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<entry>
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Supported PostgreSQL versions
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</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>
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&repmgr; 5.x
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</entry>
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<entry>
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YES
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</entry>
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<entry>
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<link linkend="release-current">&repmgrversion;</link> (&releasedate;)
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</entry>
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<entry>
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9.3, 9.4, 9.5, 9.6, 10, 11, 12
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</entry>
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</row>
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<row>
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<entry>
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&repmgr; 4.x
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</entry>
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<entry>
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NO
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</entry>
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<entry>
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<link linkend="release-4.4">4.4</link> (2019-06-27)
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</entry>
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<entry>
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9.3, 9.4, 9.5, 9.6, 10, 11
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</entry>
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</row>
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<row>
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<entry>
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&repmgr; 3.x
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</entry>
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<entry>
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NO
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</entry>
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<entry>
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<ulink url="https://repmgr.org/release-notes-3.3.2.html">3.3.2</ulink> (2017-05-30)
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</entry>
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<entry>
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9.3, 9.4, 9.5, 9.6
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</entry>
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</row>
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<row>
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<entry>
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&repmgr; 2.x
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</entry>
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<entry>
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NO
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</entry>
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<entry>
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<ulink url="https://repmgr.org/release-notes-2.0.3.html">2.0.3</ulink> (2015-04-16)
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</entry>
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<entry>
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9.0, 9.1, 9.2, 9.3, 9.4
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</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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<important>
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<para>
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The &repmgr; 2.x and 3.x series are no longer maintained or supported.
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We strongly recommend upgrading to the latest &repmgr; version.
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</para>
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<para>
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Following the release of &repmgr; 5.0, there will be no further releases of
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the &repmgr; 4.x series. Note that &repmgr; 5.x is an incremental development
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of the 4.x series and &repmgr; 4.x users should upgrade to this as soon as possible.
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</para>
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</important>
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</sect2>
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<sect2 id="install-postgresql-93-94">
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<title>PostgreSQL 9.3 and 9.4 support</title>
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<indexterm>
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<primary>PostgreSQL 9.3</primary>
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<secondary>repmgr support</secondary>
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</indexterm>
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<para>
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Note that some &repmgr; functionality is not available in PostgreSQL 9.3 and PostgreSQL 9.4:
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</para>
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<itemizedlist spacing="compact" mark="bullet">
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<listitem>
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<para>
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PostgreSQL 9.3 does not support replication slots, so corresponding &repmgr; functionality
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is not available.
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</para>
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</listitem>
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<listitem>
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<para>
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In PostgreSQL 9.3 and PostgreSQL 9.4, <command>pg_rewind</command> is not part of the core
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distribution. <command>pg_rewind</command> will need to be compiled separately to be able
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to use any &repmgr; functionality which takes advantage of it.
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</para>
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</listitem>
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</itemizedlist>
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<important>
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<para>
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PostgreSQL 9.3 has reached the end of its community support period (final release was
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<ulink url="https://www.postgresql.org/docs/9.3/release-9-3-25.html">9.3.25</ulink>
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in November 2018) and will no longer be updated with security or bugfixes.
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</para>
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<para>
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PostgreSQL 9.4 has reached the end of its community support period (final release was
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<ulink url="https://www.postgresql.org/docs/9.4/release-9-4-26.html">9.4.26</ulink>
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in February 2020) and will no longer be updated with security or bugfixes.
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</para>
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<para>
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We recommend that users of these versions migrate to a recent PostgreSQL version
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as soon as possible.
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</para>
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<para>
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For further details, see the <ulink url="https://www.postgresql.org/support/versioning/">PostgreSQL Versioning Policy</ulink>.
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</para>
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</important>
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</sect2>
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</sect1>
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