47 lines
2.4 KiB
Bash
Executable File
47 lines
2.4 KiB
Bash
Executable File
#!/bin/bash
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# Postgres backup/restore hook for the immich `database` service (VectorChord/pgvecto.rs image).
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# Invoked by backupbot-two via the deploy labels:
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# backupbot.backup.pre-hook = "/pg_backup.sh backup"
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# backupbot.backup.volumes.postgres.path = "backup.sql"
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# backupbot.restore.post-hook = "/pg_backup.sh restore"
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# Backup dumps the immich DB to backup.sql (gzip) inside the postgres volume; backupbot archives that
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# file. Restore reads it back and reimports.
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#
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# The immich DB runs the VectorChord/pgvecto.rs extensions. A plain pg_dump emits
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# SELECT pg_catalog.set_config('search_path', '', false);
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# near the top; on reimport that empty search_path leaves the vector/vchord types + operator classes
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# unresolvable, so the first statement that references them errors. immich's official restore
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# (docs.immich.app/administration/backup-and-restore) rewrites that line to put `public, pg_catalog`
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# back on the search_path BEFORE the import. Without that rewrite a single-transaction import aborts
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# wholesale and nothing is restored (the bug in the original ci/pg-backup attempt). We keep
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# --single-transaction --set ON_ERROR_STOP=on (immich upstream) so a genuine failure is loud rather
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# than silently leaving a half-restored DB.
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set -e
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BACKUP_FILE='/var/lib/postgresql/data/backup.sql'
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export PGPASSWORD=$(cat "${POSTGRES_PASSWORD_FILE:-/run/secrets/db_password}")
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DB_USER="${POSTGRES_USER:-postgres}"
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DB_NAME="${POSTGRES_DB:-immich}"
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function backup {
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pg_dump -U "$DB_USER" "$DB_NAME" | gzip > "$BACKUP_FILE"
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}
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function restore {
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# immich-server holds TCP connections to the DB; terminate them so DROP DATABASE can proceed
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# (the matrix-synapse pg_hba "local trust" trick does not cover networked connections).
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psql -U "$DB_USER" -d postgres -c \
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"SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE datname='${DB_NAME}' AND pid<>pg_backend_pid();"
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psql -U "$DB_USER" -d postgres -c "DROP DATABASE ${DB_NAME} WITH (FORCE);"
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createdb -U "$DB_USER" "$DB_NAME"
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# Rewrite the empty search_path the VectorChord dump sets so vector/vchord type + operator
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# references resolve during the import (immich upstream restore procedure), then import.
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gunzip -c "$BACKUP_FILE" \
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| sed "s/SELECT pg_catalog.set_config('search_path', '', false);/SELECT pg_catalog.set_config('search_path', 'public, pg_catalog', true);/g" \
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| psql -U "$DB_USER" -d "$DB_NAME" --single-transaction --set ON_ERROR_STOP=on
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}
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$@
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