feat: POSTGRES example — add pg-table-reader HTTP function

examples/POSTGRES/code/table-reader/requirements.txt

@@ -0,0 +1 @@
+psycopg2-binary==2.9.9

examples/POSTGRES/code/table-reader/table_reader.py

@@ -0,0 +1,27 @@
+# 2026-03-18
+# table_reader.py — HTTP-функция: читает строки из terraform_demo_table и возвращает JSON.
+# Подключается к Postgres через env vars (те же что у sql-runner).
+import os
+import psycopg2
+import psycopg2.extras
+
+
+def list_rows(event):
+    # Возвращает все строки terraform_demo_table в порядке убывания created_at.
+    connection = psycopg2.connect(
+        host=os.environ["PGHOST"],
+        port=os.environ.get("PGPORT", "5432"),
+        dbname=os.environ["PGDATABASE"],
+        user=os.environ["PGUSER"],
+        password=os.environ["PGPASSWORD"],
+        sslmode=os.environ.get("PGSSLMODE", "require"),
+    )
+    try:
+        cursor = connection.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
+        cursor.execute(
+            "SELECT id, title, created_at::text FROM terraform_demo_table ORDER BY created_at DESC"
+        )
+        rows = [dict(row) for row in cursor.fetchall()]
+        return {"rows": rows, "count": len(rows)}
+    finally:
+        connection.close()

examples/POSTGRES/resources.tf

@@ -95,3 +95,38 @@ resource "sless_job" "postgres_table_init_job" {
   depends_on = [nubes_postgres_database.db]
 }
 
+# HTTP-функция читает строки из terraform_demo_table и возвращает JSON.
+# Использует те же credentials что и sql-runner.
+# Доступна по URL: https://sless.kube5s.ru/fn/<namespace>/pg-table-reader
+resource "sless_function" "postgres_table_reader" {
+  name        = "pg-table-reader"
+  runtime     = "python3.11"
+  entrypoint  = "table_reader.list_rows"
+  memory_mb   = 128
+  timeout_sec = 30
+
+  env_vars = {
+    PGHOST     = local.pg_host
+    PGPORT     = "5432"
+    PGDATABASE = local.pg_database
+    PGUSER     = local.pg_username
+    PGPASSWORD = local.pg_password
+    PGSSLMODE  = "require"
+  }
+
+  source_dir = "${path.module}/code/table-reader"
+
+  depends_on = [sless_job.postgres_table_init_job]
+}
+
+resource "sless_trigger" "postgres_table_reader_http" {
+  name     = "pg-table-reader-http"
+  type     = "http"
+  function = sless_function.postgres_table_reader.name
+  enabled  = true
+}
+
+output "table_reader_url" {
+  value = sless_trigger.postgres_table_reader_http.url
+}
+