repmgr/doc/repmgr-daemon-status.sgml

<refentry id="repmgr-daemon-status">
  <indexterm>
    <primary>repmgr daemon status</primary>
  </indexterm>

  <indexterm>
    <primary>repmgrd</primary>
    <secondary>displaying daemon status</secondary>
  </indexterm>

  <refmeta>
    <refentrytitle>repmgr daemon status</refentrytitle>
  </refmeta>

  <refnamediv>
    <refname>repmgr daemon status</refname>
    <refpurpose>display information about the status of <application>repmgrd</application> on each node in the cluster</refpurpose>
  </refnamediv>

  <refsect1>
    <title>Description</title>
    <para>
      This command provides an overview over all active nodes in the cluster and the state
      of each node's <application>repmgrd</application> instance. It can be used to check
      the result of <xref linkend="repmgr-daemon-pause"> and <xref linkend="repmgr-daemon-unpause">
      operations.
    </para>
  </refsect1>

  <refsect1>
    <title>Execution</title>
    <para>
      <command>repmgr daemon status</command> can be executed on any active node in the
      replication cluster. A valid <filename>repmgr.conf</filename> file is required.
    </para>
    <para>
      If PostgreSQL is not running on a node, &repmgr; will not be able to determine the
      status of that node's <application>repmgrd</application> instance.
    </para>
    <note>
      <para>
        After restarting PostgreSQL on any node, the <application>repmgrd</application> instance
        will take a second or two before it is able to update its status. Until then,
        <application>repmgrd</application> will be shown as not running.
      </para>
    </note>

  </refsect1>

  <refsect1>
    <title>Examples</title>
    <para>
      <application>repmgrd</application> running normally on all nodes:
    <programlisting>$ repmgr -f /etc/repmgr.conf daemon status
 ID | Name  | Role    | Status    | Upstream | repmgrd | PID   | Paused? | Upstream last seen
----+-------+---------+-----------+----------+---------+-------+---------+--------------------
 1  | node1 | primary | * running |          | running | 96563 | no      | n/a
 2  | node2 | standby |   running | node1    | running | 96572 | no      | 1 second(s) ago
 3  | node3 | standby |   running | node1    | running | 96584 | no      | 0 second(s) ago</programlisting>
    </para>

    <para>
      <application>repmgrd</application> paused on all nodes (using <xref linkend="repmgr-daemon-pause">):
    <programlisting>$ repmgr -f /etc/repmgr.conf daemon status
 ID | Name  | Role    | Status    | Upstream | repmgrd | PID   | Paused? | Upstream last seen
----+-------+---------+-----------+----------+---------+-------+---------+--------------------
 1  | node1 | primary | * running |          | running | 96563 | yes     | n/a
 2  | node2 | standby |   running | node1    | running | 96572 | yes     | 1 second(s) ago
 3  | node3 | standby |   running | node1    | running | 96584 | yes     | 0 second(s) ago</programlisting>
    </para>

    <para>
      <application>repmgrd</application> not running on one node:
    <programlisting>$ repmgr -f /etc/repmgr.conf daemon status
 ID | Name  | Role    | Status    | Upstream | repmgrd     | PID   | Paused? | Upstream last seen
----+-------+---------+-----------+----------+-------------+-------+---------+--------------------
 1  | node1 | primary | * running |          | running     | 96563 | yes     | n/a
 2  | node2 | standby |   running | node1    | not running | n/a   | n/a     | n/a
 3  | node3 | standby |   running | node1    | running     | 96584 | yes     | 0 second(s) ago</programlisting>
    </para>
  </refsect1>

  <refsect1>
    <title>Options</title>

    <variablelist>

      <varlistentry>
        <term><option>--csv</option></term>
        <listitem>
          <para>
            <command>repmgr daemon status</command> accepts an optional parameter <literal>--csv</literal>, which
            outputs the replication cluster's status in a simple CSV format, suitable for
            parsing by scripts, e.g.:
            <programlisting>
    $ repmgr -f /etc/repmgr.conf daemon status --csv
    1,node1,primary,1,1,5722,1,100,-1,default
    2,node2,standby,1,0,-1,1,100,1,default
    3,node3,standby,1,1,5779,1,100,1,default</programlisting>
          </para>
          <para>
            The columns have following meanings:
            <itemizedlist spacing="compact" mark="bullet">
              <listitem>
                <simpara>
                  node ID
                </simpara>
              </listitem>

              <listitem>
                <simpara>
                  node name
                </simpara>
              </listitem>

              <listitem>
                <simpara>
                  node type (primary or standby)
                </simpara>
              </listitem>

              <listitem>
                <simpara>
                  PostgreSQL server running (1 = running, 0 = not running)
                </simpara>
              </listitem>

              <listitem>
                <simpara>
                  <application>repmgrd</application> running (1 = running, 0 = not running, -1 = unknown)
                </simpara>
              </listitem>

              <listitem>
                <simpara>
                  <application>repmgrd</application> PID (-1 if not running or status unknown)
                </simpara>
              </listitem>

              <listitem>
                <simpara>
                  <application>repmgrd</application> paused (1 = paused, 0 = not paused, -1 = unknown)
                </simpara>
              </listitem>

              <listitem>
                <simpara>
                  <application>repmgrd</application> node priority
                </simpara>
              </listitem>

              <listitem>
                <simpara>
                  interval in seconds since the node's upstream was last seen (this will be -1 if the value could not be retrieved, or the node is primary)
                </simpara>
              </listitem>

			  <listitem>
                <simpara>
                  node location
                </simpara>
              </listitem>

            </itemizedlist>
          </para>
        </listitem>
	  </varlistentry>

	  <varlistentry>
        <term><option>--detail</option></term>
        <listitem>
          <para>
            Display additional information (<literal>location</literal>, <literal>priority</literal>)
			about the &repmgr; configuration.
          </para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><option>--verbose</option></term>
        <listitem>
          <para>
            Display the full text of any database connection error messages
          </para>
        </listitem>
      </varlistentry>

    </variablelist>

  </refsect1>

  <refsect1>
    <title>See also</title>
    <para>
      <xref linkend="repmgr-daemon-pause">, <xref linkend="repmgr-daemon-unpause">, <xref linkend="repmgr-cluster-show">
    </para>
  </refsect1>
</refentry>