feat: add infra's terraform configs (#164)

* feat: add infra's terraform configs

* feat: add databases for openobserve - multi clusters

* fix: openobserve's db name

hosts/idols-aquamarine/postgresql.nix

@@ -12,7 +12,9 @@
   dataDir = "/data/apps/postgresql/${package.psqlSchema}";
 in {
   # Create Directories
+  # https://www.freedesktop.org/software/systemd/man/latest/tmpfiles.d.html#Type
   systemd.tmpfiles.rules = [
+    "d /data/apps/postgresql 0755 ${user} ${user}"
     "d ${dataDir} 0755 ${user} ${user}"
   ];
 
@@ -32,12 +34,18 @@ in {
     # Ensures that the specified databases exist.
     ensureDatabases = [
       "mytestdb" # for testing
-      "openobserve"
       "juicefs"
+      # openobserve for every k8s clusters
+      "o2_k3s_test_1"
+      "o2_k3s_prod_1"
     ];
     ensureUsers = [
       {
-        name = "openobserve";
+        name = "o2_k3s_test_1";
+        ensureDBOwnership = true;
+      }
+      {
+        name = "o2_k3s_prod_1";
         ensureDBOwnership = true;
       }
       {