feat: restrict access to postgres socket

files/postgres/postgresql.conf

@@ -18,6 +18,9 @@ hba_file = '/etc/postgres/pg_hba.conf'
 # because we want only uni socket connections
 listen_addresses = ''
 
+# Forbide access to users not in group postgres
+unix_socket_permissions = 0770
+
 
 #-------------------------------------------------------------------------------
 # REPORTING AND LOGGING

netoik-db.spec

@@ -22,6 +22,10 @@ Install the database management system called postgresql with a predefined confi
 %make_install
 
 %post
+# Create sock directory if not existing
+mkdir --parents --mode 755 "%{_rundir}/postgresql"
+chown postgres:postgres "%{_rundir}/postgresql"
+
 # Restart services
 systemctl daemon-reload
 systemctl reenable postgresql.service
@@ -30,7 +34,8 @@ systemctl restart postgresql.service
 # Create databases and users from DB_USERS variable (separator is ",") if not existing
 IFS="," read -ra users <<< "$DB_USERS";
 for user in "${users[@]}"; do
-  if ! runuser --user=postgres -- psql --quiet --tuples-only --command='\du' | grep --invert-match postgres | grep --quiet "$user"; then
+  usermod --append --groups postgres "$user";
+  if ! runuser --user=postgres -- psql --quiet --tuples-only --command='\du' | grep --quiet "$user"; then
     runuser --user=postgres -- createuser "$user"
     runuser --user=postgres -- createdb --owner="$user" "$user"
   fi
@@ -46,4 +51,3 @@ done
 
 %changelog
 %autochangelog
-