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Merge pull request #657 from nlewo/create-pg-trgm-in-module

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Create `pg_trgm` extension in the NixOS module
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Eelco Dolstra 2019-07-25 17:48:45 +02:00 committed by GitHub
parent 8c9aec5f12 8a0a5ec3a3
commit 5e9439e774
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 35 additions and 5 deletions
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3
hydra-module.nix
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@ -273,6 +273,7 @@ in
runuser -u ${config.services.postgresql.superUser} -- ${config.services.postgresql.package}/bin/createdb -O hydra hydra
touch ${baseDir}/.db-created
fi
echo "create extension if not exists pg_trgm" | runuser -u ${config.services.postgresql.superUser} -- ${config.services.postgresql.package}/bin/psql hydra
''}
if [ ! -e ${cfg.gcRootsDir} ]; then
@ -415,6 +416,8 @@ in
hydra-users hydra-queue-runner hydra
hydra-users hydra-www hydra
hydra-users root hydra
# The postgres user is used to create the pg_trgm extension for the hydra database
hydra-users postgres postgres
'';
services.postgresql.authentication = optionalString haveLocalDB

19
src/sql/hydra.sql
View file

@ -690,7 +690,20 @@ create index IndexJobsetEvalsOnJobsetId on JobsetEvals(project, jobset, id desc)
create index IndexBuildsOnNotificationPendingSince on Builds(notificationPendingSince) where notificationPendingSince is not null;
#ifdef POSTGRESQL
-- Provide an index used by LIKE operator on builds.drvpath (search query)
CREATE EXTENSION pg_trgm;
CREATE INDEX IndexTrgmBuildsOnDrvpath ON builds USING gin (drvpath gin_trgm_ops);
-- The pg_trgm extension has to be created by a superuser. The NixOS
-- module creates this extension in the systemd prestart script. We
-- then ensure the extension has been created before creating the
-- index. If it is not possible to create the extension, a warning
-- message is emitted to inform the user the index creation is skipped
-- (slower complex queries on builds.drvpath).
do $$
begin
create extension if not exists pg_trgm;
-- Provide an index used by LIKE operator on builds.drvpath (search query)
create index IndexTrgmBuildsOnDrvpath on builds using gin (drvpath gin_trgm_ops);
exception when others then
raise warning 'Can not create extension pg_trgm: %', SQLERRM;
raise warning 'HINT: Temporary provide superuser role to your Hydra Postgresql user and run the script src/sql/upgrade-57.sql';
raise warning 'The pg_trgm index on builds.drvpath has been skipped (slower complex queries on builds.drvpath)';
end$$;
#endif

18
src/sql/upgrade-57.sql
View file

@ -1,2 +1,16 @@
CREATE EXTENSION pg_trgm;
CREATE INDEX IndexTrgmBuildsOnDrvpath ON builds USING gin (drvpath gin_trgm_ops);
-- The pg_trgm extension has to be created by a superuser. The NixOS
-- module creates this extension in the systemd prestart script. We
-- then ensure the extension has been created before creating the
-- index. If it is not possible to create the extension, a warning
-- message is emitted to inform the user the index creation is skipped
-- (slower complex queries on builds.drvpath).
do $$
begin
create extension if not exists pg_trgm;
-- Provide an index used by LIKE operator on builds.drvpath (search query)
create index IndexTrgmBuildsOnDrvpath on builds using gin (drvpath gin_trgm_ops);
exception when others then
raise warning 'Can not create extension pg_trgm: %', SQLERRM;
raise warning 'HINT: Temporary provide superuser role to your Hydra Postgresql user and run the script src/sql/upgrade-57.sql';
raise warning 'The pg_trgm index on builds.drvpath has been skipped (slower complex queries on builds.drvpath)';
end$$;