1734 adding config and maintenance window

infra/config/example.ts

@@ -11,7 +11,10 @@ export const config: EnvConfig = {
   },
   domain: "metriport.com",
   subdomain: "fhir",
-  dbName: "my_db",
-  dbUsername: "my_db_user",
+  fhirDatabase: {
+    name: "my_db",
+    username: "my_db_user",
+    maintenanceWindow: "Sun:02:00-Sun:02:30",
+  },
 };
 export default config;

infra/lib/env-config.ts

@@ -4,14 +4,40 @@ export type EnvConfig = {
   environmentType: EnvType;
   region: string;
   vpcId: string;
-  zone: { // Private hosted zone for this region
+  zone: {
+    // Private hosted zone for this region
     id: string;
     name: string;
-  }
+  };
   domain: string;
   subdomain: string;
-  dbName: string;
-  dbUsername: string;
+  fhirDatabase: {
+    /**
+     * The name of the database.
+     */
+    name: string;
+    /**
+     * The FHIR username to connect to the database.
+     */
+    username: string;
+    /**
+     * From CDK: A preferred maintenance window day/time range. Should be specified as a range ddd:hh24:mi-ddd:hh24:mi (24H Clock UTC).
+     *
+     * Example: 'Sun:23:45-Mon:00:15'.
+     *
+     * Must be at least 30 minutes long.
+     *
+     * @see: https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/USER_UpgradeDBInstance.Maintenance.html#Concepts.DBMaintenance
+     */
+    maintenanceWindow: string;
+    /**
+     * From CDK: The minimum number of Aurora capacity units (ACUs) for a DB instance in an Aurora Serverless v2 cluster.
+     *
+     * You can specify ACU values in half-step increments, such as 8, 8.5, 9, and so on. The smallest value that you can use is 0.5.
+     *
+     * @see — http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-rds-dbcluster-serverlessv2scalingconfiguration.html#cfn-rds-dbcluster-serverlessv2scalingconfiguration-mincapacity
+     */
+  };
   slack?: {
     workspaceId: string;
     alertsChannelId: string;

infra/lib/fhir-server-stack.ts

@@ -114,9 +114,8 @@ export class FHIRServerStack extends Stack {
     const { minDBCap, maxDBCap, minSlowLogDurationInMs } = settings();
 
     // create database credentials
+    const dbConfig = props.config.fhirDatabase;
     const dbClusterName = "fhir-server";
-    const dbName = props.config.dbName;
-    const dbUsername = props.config.dbUsername;
     const dbPasswordSecret = new secret.Secret(this, "FHIRServerDBPassword", {
       secretName: "FHIRServerDBPassword",
       generateSecretString: {
@@ -125,7 +124,7 @@ export class FHIRServerStack extends Stack {
       },
     });
     const dbCreds = Credentials.fromPassword(
-      dbUsername,
+      dbConfig.username,
       dbPasswordSecret.secretValue
     );
     // aurora serverlessv2 db
@@ -148,8 +147,9 @@ export class FHIRServerStack extends Stack {
         vpc: this.vpc,
         instanceType: new InstanceType("serverless"),
       },
+      preferredMaintenanceWindow: dbConfig.maintenanceWindow,
       credentials: dbCreds,
-      defaultDatabaseName: dbName,
+      defaultDatabaseName: dbConfig.name,
       clusterIdentifier: dbClusterName,
       storageEncrypted: true,
       parameterGroup,
@@ -174,7 +174,7 @@ export class FHIRServerStack extends Stack {
 
     return {
       dbCluster,
-      dbCreds: { username: dbUsername, password: dbPasswordSecret },
+      dbCreds: { username: dbConfig.username, password: dbPasswordSecret },
     };
   }
 
@@ -205,10 +205,10 @@ export class FHIRServerStack extends Stack {
 
     // Prep DB related data to the server
     if (!dbCreds.password) throw new Error(`Missing DB password`);
+    const dbConfig = props.config.fhirDatabase;
     const dbAddress = dbCluster.clusterEndpoint.hostname;
     const dbPort = dbCluster.clusterEndpoint.port;
-    const dbName = props.config.dbName;
-    const dbUrl = `jdbc:postgresql://${dbAddress}:${dbPort}/${dbName}`;
+    const dbUrl = `jdbc:postgresql://${dbAddress}:${dbPort}/${dbConfig.name}`;
 
     // Run some servers on fargate containers
     const fargateService =

infra/lib/shared/cloudwatch-metric.ts

@@ -1,4 +1,9 @@
-import { Alarm, ComparisonOperator, Metric, TreatMissingData } from "aws-cdk-lib/aws-cloudwatch";
+import {
+  Alarm,
+  ComparisonOperator,
+  Metric,
+  TreatMissingData,
+} from "aws-cdk-lib/aws-cloudwatch";
 import { SnsAction } from "aws-cdk-lib/aws-cloudwatch-actions";
 import { Construct } from "constructs";
 

infra/lib/shared/config.ts

@@ -24,8 +24,10 @@ export async function initConfig(node: Node): Promise<EnvConfig> {
   const configPath = `../../config/${env}.ts`;
   const configModule = await import(configPath);
   if (!configModule || !configModule.default) {
-    throw new Error(`Ensure config is defined, could not fine file ${configPath}`);
+    throw new Error(
+      `Ensure config is defined, could not fine file ${configPath}`
+    );
   }
   config = configModule.default as EnvConfig;
   return config;
-}
+}

infra/lib/shared/target-group.ts

@@ -1,7 +1,13 @@
 import { Duration } from "aws-cdk-lib";
-import { ComparisonOperator, TreatMissingData } from "aws-cdk-lib/aws-cloudwatch";
+import {
+  ComparisonOperator,
+  TreatMissingData,
+} from "aws-cdk-lib/aws-cloudwatch";
 import { SnsAction } from "aws-cdk-lib/aws-cloudwatch-actions";
-import { ApplicationTargetGroup, HttpCodeTarget } from "aws-cdk-lib/aws-elasticloadbalancingv2";
+import {
+  ApplicationTargetGroup,
+  HttpCodeTarget,
+} from "aws-cdk-lib/aws-elasticloadbalancingv2";
 import { Construct } from "constructs";
 import { addAlarmToMetric } from "../shared/cloudwatch-metric";