Commit 71d79ed6 authored by Darko Poljak's avatar Darko Poljak

Merge branch 'feature/type/__postgres_conf' into 'master'

__postgres_conf: new type

See merge request ungleich-public/cdist!972
parents 1bb696a4 19bf37be
#!/bin/sh -e
# -*- mode: sh; indent-tabs-mode: t -*-
#
# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
os=$("${__explorer:?}/os")
case ${os}
in
(alpine)
echo 'postgres'
;;
(centos|rhel|scientific)
echo 'postgres'
;;
(debian|devuan|ubuntu)
echo 'postgres'
;;
(freebsd)
test -x /usr/local/etc/rc.d/postgresql || {
printf 'could not find postgresql rc script./n' >&2
exit 1
}
pg_status=$(/usr/local/etc/rc.d/postgresql onestatus) || {
printf 'postgresql daemon is not running.\n' >&2
exit 1
}
pg_pid=$(printf '%s\n' "${pg_status}" \
| sed -n 's/^pg_ctl:.*(PID: *\([0-9]*\))$/\1/p')
# PostgreSQL < 9.6: pgsql
# PostgreSQL >= 9.6: postgres
ps -o user -p "${pg_pid}" | sed -n '2p'
;;
(netbsd)
echo 'pgsql'
;;
(openbsd)
echo '_postgresql'
;;
(suse)
echo 'postgres'
;;
(*)
echo "Unsupported OS: ${os}" >&2
exit 1
;;
esac
#!/bin/sh -e
# -*- mode: sh; indent-tabs-mode: t -*-
#
# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
postgres_user=$("${__type_explorer:?}/postgres_user")
conf_name=${__object_id:?}
tolower() { printf '%s' "$*" | tr '[:upper:]' '[:lower:]'; }
tobytes() {
# NOTE: This function treats everything as base 2.
# It is not compatible with SI units.
awk 'BEGIN { FS = "\n" }
/TB$/ { $0 = ($0 * 1024) "GB" }
/GB$/ { $0 = ($0 * 1024) "MB" }
/MB$/ { $0 = ($0 * 1024) "kB" }
/kB$/ { $0 = ($0 * 1024) "B" }
/B?$/ { sub(/ *B?$/, "") }
($0*1) == $0 # is number
' <<-EOF
$1
EOF
}
tomillisecs() {
awk 'BEGIN { FS = "\n" }
/d$/ { $0 = ($0 * 24) "h" }
/h$/ { $0 = ($0 * 60) "min" }
/min$/ { $0 = ($0 * 60) "s" }
/[^m]s$/ { $0 = ($0 * 1000) "ms" }
/ms$/ { $0 *= 1 }
($0*1) == $0 # is number
' <<-EOF
$1
EOF
}
tobool() {
# prints either 'on' or 'off'
case $(tolower "$1")
in
(t|true|y|yes|on|1)
echo 'on' ;;
(f|false|n|no|off|0)
echo 'off' ;;
(*)
printf 'Inavlid bool value: %s\n' "$2" >&2
return 1
;;
esac
return 0
}
quote() { printf '%s\n' "$*" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/"; }
psql_exec() {
su - "${postgres_user}" -c "psql postgres -twAc $(quote "$*")"
}
psql_conf_source() {
# NOTE: SHOW/SET are case-insentitive, so this command should also be.
psql_exec "SELECT CASE WHEN source = 'default' OR setting = boot_val THEN 'default' ELSE source END FROM pg_settings WHERE lower(name) = lower('$1')"
}
psql_conf_cmp() (
IFS='|' read -r lower_name vartype setting unit <<-EOF
$(psql_exec "SELECT lower(name), vartype, setting, unit FROM pg_settings WHERE lower(name) = lower('$1')")
EOF
should_value=$2
is_value=${setting}
# The following case contains special cases for special settings.
case ${lower_name}
in
(archive_command)
if test "${setting}" = '(disabled)'
then
# DAFUQ PostgreSQL?!
# PostgreSQL returns (disabled) if the feature is inactive.
# We cannot compare the values unless it is enabled, first.
return 0
fi
;;
(archive_mode|backslash_quote|constraint_exclusion|force_parallel_mode|huge_pages|synchronous_commit)
# Although only 'on', 'off' are documented, PostgreSQL accepts all
# the "likely" variants of "on" and "off".
case $(tolower "${should_value}")
in
(on|off|true|false|yes|no|1|0)
should_value=$(tobool "${should_value}")
;;
esac
;;
esac
case ${vartype}
in
(bool)
test -z "${unit}" || {
# please fix the explorer if this error occurs.
printf 'units are not supported for vartype: %s\n' "${vartype}" >&2
exit 1
}
should_value=$(tobool "${should_value}")
test "${is_value}" = "${should_value}"
;;
(enum)
test -z "${unit}" || {
# please fix the explorer if this error occurs.
printf 'units are not supported with vartype: %s\n' "${vartype}" >&2
exit 1
}
# NOTE: All enums that are currently defined are lower case, but
# PostgreSQL also accepts upper case spelling.
should_value=$(tolower "$2")
test "${is_value}" = "${should_value}"
;;
(integer)
# split multiples from unit, first (e.g. 8kB -> 8, kB)
case ${unit}
in
([0-9]*)
multiple=${unit%%[!0-9]*}
unit=${unit##*[0-9 ]}
;;
(*) multiple=1 ;;
esac
is_value=$((setting * multiple))${unit}
if expr "${should_value}" : '-\{0,1\}[0-9]*$' >/dev/null
then
# default unit
should_value=$((should_value * multiple))${unit}
fi
# then, do conversion
# NOTE: these conversions work for integers only!
case ${unit}
in
(B|[kMGT]B)
# bytes
is_bytes=$(tobytes "${is_value}")
should_bytes=$(tobytes "${should_value}")
test $((is_bytes)) -eq $((should_bytes))
;;
(ms|s|min|h|d)
# seconds
is_ms=$(tomillisecs "${is_value}")
should_ms=$(tomillisecs "${should_value}")
test $((is_ms)) -eq $((should_ms))
;;
('')
# no unit
is_int=${is_value}
should_int=${should_value}
test $((is_int)) -eq $((should_int))
;;
esac
;;
(real|string)
# NOTE: reals could possibly have units, but currently there none.
test -z "${unit}" || {
# please fix the explorer if this error occurs.
printf 'units are not supported with vartype: %s\n' "${vartype}" >&2
exit 1
}
test "${is_value}" = "${should_value}"
;;
esac
)
psql_exec 'SELECT 1' >/dev/null || {
echo 'Connection to PostgreSQL server failed' >&2
exit 1
}
case $(psql_conf_source "${conf_name}")
in
('')
printf 'Invalid configuration parameter: %s\n' "${conf_name}" >&2
exit 1
;;
(default)
echo absent
;;
(*)
if ! test -f "${__object:?}/parameter/value"
then
echo present
elif psql_conf_cmp "${conf_name}" "$(cat "${__object:?}/parameter/value")"
then
echo present
else
echo different
fi
;;
esac
#!/bin/sh -e
# -*- mode: sh; indent-tabs-mode: t -*-
#
# 2019-2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
# 2020 Beni Ruef (bernhard.ruef at ssrq-sds-fds.ch)
#
# This file is part of cdist.
#
# cdist is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cdist is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
state_is=$(cat "${__object:?}/explorer/state")
state_should=$(cat "${__object:?}/parameter/state")
postgres_user=$(cat "${__object:?}/explorer/postgres_user")
conf_name=${__object_id:?}
if test "${state_is}" = "${state_should}"
then
exit 0
fi
quote() {
for _arg
do
shift
if test -n "$(printf '%s' "${_arg}" | tr -d -c '\t\n \042-\047\050-\052\073-\077\133\\`|~' | tr -c '' '.')"
then
# needs quoting
set -- "$@" "'$(printf '%s' "${_arg}" | sed -e "s/'/'\\\\''/g")'"
else
set -- "$@" "${_arg}"
fi
done
unset _arg
# NOTE: Use printf because POSIX echo interprets escape sequences
printf '%s' "$*"
}
psql_cmd() {
printf 'su - %s -c %s\n' "$(quote "${postgres_user}")" "$(quote "$(quote psql "$@")")"
}
case ${state_should}
in
(present)
test -n "${__object:?}/parameter/value" || {
echo 'Missing required parameter --value' >&2
exit 1
}
cat <<-EOF
exec 3< "\${__object:?}/parameter/value"
$(psql_cmd postgres -tAwq -o /dev/null -v ON_ERROR_STOP=on) <<'SQL'
\\set conf_value \`cat <&3\`
ALTER SYSTEM SET ${conf_name} = :'conf_value';
SELECT pg_reload_conf();
SQL
exec 3<&-
EOF
;;
(absent)
psql_cmd postgres -qwc "ALTER SYSTEM SET ${conf_name} TO DEFAULT"
;;
(*)
printf 'Invalid --state: %s\n' "${state_should}" >&2
printf 'Only "present" and "absent" are acceptable.\n' >&2
exit 1
;;
esac
# Restart PostgreSQL server if required to apply new configuration value
cat <<EOF
if test 't' = "\$($(psql_cmd postgres -twAc "SELECT pending_restart FROM pg_settings WHERE lower(name) = lower('${conf_name}')"))"
then
$(
init=$(cat "${__global:?}/explorer/init")
case ${init}
in
(systemd)
echo 'systemctl restart postgresql.service'
;;
(*openrc*)
echo 'rc-service postgresql restart'
;;
(sysvinit)
echo '/etc/init.d/postgresql restart'
;;
(init)
case $(cat "${__global:?}/explorer/kernel_name")
in
(FreeBSD)
echo '/usr/local/etc/rc.d/postgresql restart'
;;
(OpenBSD|NetBSD)
echo '/etc/rc.d/postgresql restart'
;;
(*)
echo "Unsupported operating system. Don't know how to restart services." >&2
exit 1
esac
;;
(*)
printf "Don't know how to restart services with your init (%s)\n" "${init}" >&2
exit 1
esac
)
fi
EOF
cdist-type__postgres_conf(7)
============================
NAME
----
cdist-type__postgres_conf - Alter PostgreSQL configuration
DESCRIPTION
-----------
Configure a running PostgreSQL server using ``ALTER SYSTEM``.
REQUIRED PARAMETERS
-------------------
value
The value to set (can be omitted if ``--state`` is set to ``absent``).
OPTIONAL PARAMETERS
-------------------
state
``present`` or ``absent``.
Defaults to ``present``.
BOOLEAN PARAMETERS
------------------
None.
EXAMPLES
--------
.. code-block:: sh
# set timezone
__postgres_conf timezone --value Europe/Zurich
# reset maximum number of concurrent connections to default (normally 100)
__postgres_conf max_connections --state absent
SEE ALSO
--------
None.
AUTHORS
-------
Beni Ruef (bernhard.ruef--@--ssrq-sds-fds.ch)
Dennis Camera (dennis.camera--@--ssrq-sds-fds.ch)
COPYING
-------
Copyright \(C) 2019-2021 SSRQ (www.ssrq-sds-fds.ch).
You can redistribute it and/or modify it under the terms of the GNU General
Public License as published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
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