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118 lines
4.6 KiB
ReStructuredText
118 lines
4.6 KiB
ReStructuredText
.. _pgagent_install:
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***************************
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`Installing pgAgent`:index:
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***************************
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pgAgent runs as a daemon on Unix systems, and a service on Windows systems. In
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most cases it will run on the database server itself - for this reason, pgAgent
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is not automatically configured when pgAdmin is installed. In some cases
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however, it may be preferable to run pgAgent on multiple systems, against the
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same database; individual jobs may be targeted at a particular host, or left
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for execution by any host. Locking prevents execution of the same instance of a
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job by multiple hosts.
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Database setup
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**************
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Before using pgAdmin to manage pgAgent, you must create the pgAgent extension in
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the maintenance database registered with pgAdmin. To install pgAgent on a
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PostgreSQL host, connect to the *postgres* database, and navigate through the
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*Tools* menu to open the Query tool. For server versions 9.1 or later, and
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pgAgent 3.4.0 or later, enter the following command in the query window, and
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click the *Execute* icon:
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.. code-block:: sql
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CREATE EXTENSION pgagent;
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This command will create a number of tables and other objects in a schema
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called 'pgagent'.
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The database must also have the pl/pgsql procedural language installed - use
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the PostgreSQL CREATE LANGUAGE command to install pl/pgsql if necessary. To
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install pl/pgsql, enter the following command in the query window, and click
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the *Execute* icon:
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.. code-block:: sql
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CREATE LANGUAGE plpgsql;
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Daemon installation on Unix
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***************************
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.. note:: pgAgent is available in Debian/Ubuntu (DEB) and Redhat/Fedora (RPM)
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packages for Linux users, as well as source code. See the
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`pgAdmin Website <https://www.pgadmin.org/download/>`_. for more
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information.
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To install the pgAgent daemon on a Unix system, you will normally need to have
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root privileges to modify the system startup scripts. Modifying system startup
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scripts is quite system-specific so you should consult your system documentation
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for further information.
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The program itself takes few command line options, most of which are only
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needed for debugging or specialised configurations::
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Usage:
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/path/to/pgagent [options] <connect-string>
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options:
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-f run in the foreground (do not detach from the terminal)
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-t <poll time interval in seconds (default 10)>
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-r <retry period after connection abort in seconds (>=10, default 30)>
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-s <log file (messages are logged to STDOUT if not specified)>
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-l <logging verbosity (ERROR=0, WARNING=1, DEBUG=2, default 0)>
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The connection string is a standard PostgreSQL libpq connection string (see
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the `PostgreSQL documentation on the connection string <https://www.postgresql.org/docs/current/libpq.html#libpq-connect>`_
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for further details). For example, the following command line will run pgAgent
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against a server listening on the localhost, using a database called 'pgadmin',
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connecting as the user 'postgres':
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.. code-block:: bash
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/path/to/pgagent hostaddr=127.0.0.1 dbname=postgres user=postgres
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Service installation on Windows
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*******************************
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.. note:: pgAgent is available in a pre-built installer if you use
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`EnterpriseDB's PostgreSQL Installers <https://www.enterprisedb.com/downloads/postgres-postgresql-downloads>`_.
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Use the StackBuilder application to download and install it. If installed
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in this way, the service will automatically be created and the instructions
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below can be ignored.
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pgAgent can install itself as a service on Windows systems. The command line
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options available are similar to those on Unix systems, but include an
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additional parameter to tell the service what to do::
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Usage:
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pgAgent REMOVE <serviceName>
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pgAgent INSTALL <serviceName> [options] <connect-string>
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pgAgent DEBUG [options] <connect-string>
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options:
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-u <user or DOMAIN\user>
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-p <password>
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-d <displayname>
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-t <poll time interval in seconds (default 10)>
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-r <retry period after connection abort in seconds (>=10, default 30)>
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-l <logging verbosity (ERROR=0, WARNING=1, DEBUG=2, default 0)>
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The service may be quite simply installed from the command line as follows
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(adjust the path as required):
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.. code-block:: bash
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"C:\Program Files\pgAgent\bin\pgAgent" INSTALL pgAgent -u postgres -p secret hostaddr=127.0.0.1 dbname=postgres user=postgres
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You can then start the service at the command line using *net start pgAgent*,
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or from the *Services* control panel applet. Any logging output or errors will
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be reported in the Application event log. The DEBUG mode may be used to run
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pgAgent from a command prompt. When run this way, log messages will output to
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the command window.
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