[type/__postgres_conf] New type based on ALTER SYSTEM command
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cdist/conf/type/__postgres_conf/gencode-remote
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cdist/conf/type/__postgres_conf/gencode-remote
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#!/bin/sh -e
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# -*- mode: sh; indent-tabs-mode: t -*-
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#
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# 2019 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
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# 2020 Beni Ruef (bernhard.ruef at ssrq-sds-fds.ch)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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os=$(cat "${__global}/explorer/os")
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state_should=$(cat "${__object}/parameter/state")
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if [ "${state_should}" != 'present' ] && [ "${state_should}" != 'absent' ]
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then
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echo "Invalid state '${state_should}'." \
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'Only "present" and "absent" are acceptable' >&2
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exit 1
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fi
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if [ "${state_should}" = 'present' ] && [ ! -f "${__object}/parameter/value" ]
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then
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echo 'Missing required parameter "value"' >&2
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exit 1
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fi
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# Parameters
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conf_name="${__object_id}"
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if [ -f "${__object}/parameter/value" ]
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then
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conf_value=$(cat "${__object}/parameter/value")
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fi
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if [ "${state_should}" = 'present' ]
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then
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set_command="ALTER SYSTEM SET ${conf_name} = '${conf_value}'"
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check_command="SHOW ${conf_name}"
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else
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set_command="ALTER SYSTEM SET ${conf_name} = DEFAULT"
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fi
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case $os
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in
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openbsd|devuan)
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case $os
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in
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openbsd)
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postgres_user='_postgresql'
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restart_command='/etc/rc.d/postgresql restart'
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;;
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devuan)
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postgres_user='postgres'
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restart_command='/etc/init.d/postgresql restart'
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;;
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esac
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# needs two separate psql commands because ALTER SYSTEM
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# cannot run inside a transaction block
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cat <<-EOF
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su - ${postgres_user} -c "psql postgres -twAc \
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\"${set_command}\""
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su - ${postgres_user} -c "psql postgres -twAc \
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\"SELECT pg_reload_conf()\""
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EOF
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# check success (makes only sense if setting to a non-default value)
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# and restart server if needed
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if [ "${state_should}" = 'present' ]
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then
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cat <<-EOF
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if [ \$(su - ${postgres_user} -c "psql postgres -twAc \"SHOW ${conf_name}\"") != '${conf_value}' ]
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then
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${restart_command}
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fi
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EOF
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fi
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;;
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*)
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echo "Unsupported OS: ${os}" >&2
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exit 1
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;;
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esac
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55
cdist/conf/type/__postgres_conf/man.rst
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cdist/conf/type/__postgres_conf/man.rst
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cdist-type__postgres_conf(7)
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============================
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Configure a PostgreSQL server.
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NOTE: This type might need to be run multiple times to apply all bits of the
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configuration due to ordering requirements.
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SSRQ <cdist--@--ssrq-sds-fds.ch>
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DESCRIPTION
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-----------
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Configure a PostgreSQL server using ALTER SYSTEM.
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REQUIRED PARAMETERS
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-------------------
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value
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The value to setup (can be omitted when state is set to "absent").
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OPTIONAL PARAMETERS
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-------------------
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state
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"present" or "absent". Defaults to "present".
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BOOLEAN PARAMETERS
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------------------
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None.
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EXAMPLES
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--------
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.. code-block:: sh
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# set timezone
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__postgres_conf timezone --value Europe/Zurich
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# reset maximum number of concurrent connections to default (normally 100)
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__postgres_conf max_connections --state absent
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SEE ALSO
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--------
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- `cdist-type(7) <cdist-type.html>`_
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COPYING
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-------
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Copyright \(C) 2020 SSRQ (www.ssrq-sds-fds.ch).
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Free use of this software is granted under the terms
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of the GNU General Public License version 3 (GPLv3).
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1
cdist/conf/type/__postgres_conf/parameter/default/state
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1
cdist/conf/type/__postgres_conf/parameter/default/state
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present
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2
cdist/conf/type/__postgres_conf/parameter/optional
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2
cdist/conf/type/__postgres_conf/parameter/optional
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state
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value
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