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Cleanup PostgreSQL for state version 17.09 (#25753)

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* postgresql service: make 9.6 the default version for 17.09

* postgresql service: change default superuser for 17.09

Change the default superuser from `root` to `postgres` for state
version 17.09

* postgresql service: change default data directory for 17.09

The new directory includes the schema version of the database.
This makes upgrades easier and is more consistent with other distros.

* updated nixos release notes
This commit is contained in:
Pascal Bach 2017-05-30 22:05:39 +02:00 committed by zimbatm
parent 3fa1be6f49
commit de52d2450e
2 changed files with 26 additions and 5 deletions
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11
nixos/doc/manual/release-notes/rl-1709.xml
View file

@ -78,6 +78,17 @@ rmdir /var/lib/ipfs/.ipfs
</programlisting>
</para>
</listitem>
<listitem>
<para>
The <literal>postgres</literal> default version was changed from 9.5 to 9.6.
</para>
<para>
The <literal>postgres</literal> superuser name has changed from <literal>root</literal> to <literal>postgres</literal> to more closely follow what other Linux distributions are doing.
</para>
<para>
The <literal>postgres</literal> default <literal>dataDir</literal> has changed from <literal>/var/db/postgres</literal> to <literal>/var/lib/postgresql/$psqlSchema</literal> where $psqlSchema is 9.6 for example.
</para>
</listitem>
</itemizedlist>

20
nixos/modules/services/databases/postgresql.nix
View file

@ -38,6 +38,10 @@ let
pre84 = versionOlder (builtins.parseDrvName postgresql.name).version "8.4";
# NixOS traditionally used `root` as superuser, most other distros use `postgres`. From 17.09
# we also try to follow this standard
superuser = (if versionAtLeast config.system.stateVersion "17.09" then "postgres" else "root");
in
{
@ -74,7 +78,7 @@ in
dataDir = mkOption {
type = types.path;
default = "/var/db/postgresql";
example = "/var/lib/postgresql/9.6";
description = ''
Data directory for PostgreSQL.
'';
@ -160,7 +164,13 @@ in
# Note: when changing the default, make it conditional on
# ‘system.stateVersion’ to maintain compatibility with existing
# systems!
mkDefault (if versionAtLeast config.system.stateVersion "16.03" then pkgs.postgresql95 else pkgs.postgresql94);
mkDefault (if versionAtLeast config.system.stateVersion "17.09" then pkgs.postgresql96
else if versionAtLeast config.system.stateVersion "16.03" then pkgs.postgresql95
else pkgs.postgresql94);
services.postgresql.dataDir =
mkDefault (if versionAtLeast config.system.stateVersion "17.09" then "/var/lib/postgresql/${config.services.postgresql.package.psqlSchema}"
else "/var/db/postgresql");
services.postgresql.authentication = mkAfter
''
@ -205,7 +215,7 @@ in
''
# Initialise the database.
if ! test -e ${cfg.dataDir}/PG_VERSION; then
initdb -U root
initdb -U ${superuser}
# See postStart!
touch "${cfg.dataDir}/.first_startup"
fi
@ -237,14 +247,14 @@ in
# Wait for PostgreSQL to be ready to accept connections.
postStart =
''
while ! psql --port=${toString cfg.port} postgres -c "" 2> /dev/null; do
while ! ${pkgs.sudo}/bin/sudo -u ${superuser} psql --port=${toString cfg.port} -d postgres -c "" 2> /dev/null; do
if ! kill -0 "$MAINPID"; then exit 1; fi
sleep 0.1
done
if test -e "${cfg.dataDir}/.first_startup"; then
${optionalString (cfg.initialScript != null) ''
psql -f "${cfg.initialScript}" --port=${toString cfg.port} postgres
${pkgs.sudo}/bin/sudo -u ${superuser} psql -f "${cfg.initialScript}" --port=${toString cfg.port} -d postgres
''}
rm -f "${cfg.dataDir}/.first_startup"
fi