Merge pull request #93 from zalando/feature/ensure_logfiles_exist

Ensure postgresql logfiles all exist

postgres-appliance/launch.sh

@@ -6,6 +6,10 @@ if [ $? -ne 1 ]; then echo "ERROR: Supervisord is already running"; exit 1; fi
 mkdir -p "$PGROOT" && chown -R postgres:postgres "$PGROOT"
 mkdir -p "$PGLOG" && chown -R postgres:postgres "$PGLOG"
 
+## Ensure all logfiles exist, most appliances will have
+## a foreign data wrapper pointing to these files
+for i in $(seq 0 7); do touch "${PGLOG}/postgresql-$i.csv"; done
+
 python3 /configure_spilo.py all
 (
     sudo PATH="$PATH" -u postgres /patroni_wait.sh -t 3600 -- /postgres_backup.sh "$WALE_ENV_DIR" "$PGDATA"