diff --git a/schema/01_initial.sql b/schema/01_initial.sql
index 587bab5..c7acbfb 100644
--- a/schema/01_initial.sql
+++ b/schema/01_initial.sql
@@ -13,6 +13,10 @@ create table if not exists pools(
   layer3domain_id integer not null references layer3domains(id),
   name varchar(128) unique,
   attributes jsonb not null default '{}'::jsonb,
+  created_at timestamptz not null default now(),
+  created_by varchar(128) not null,
+  modified_at timestamptz not null default now(),
+  modified_by varchar(128) not null,
   primary key(layer3domain_id, id)
 );