get configs from context (#23)

Setup context environments using cdk.json so that we can deploy
to different environments (dev/stage/prod)

.github/workflows/check.yml

@@ -25,7 +25,7 @@ jobs:
           AWS_LOADER_S3_SECRET_ACCESS_KEY=DUMMY_S3_SECRET_KEY
           SECURITY_KEY=00000
           EOT
-      - name: cdk synth
+      - name: cdk --context env=dev synth
         uses: youyo/aws-cdk-github-actions@v2
         with:
           cdk_subcommand: 'synth'

README.md

@@ -46,7 +46,7 @@ $ pip install -r requirements.txt -r requirements-dev.txt
 At this point you can now synthesize the CloudFormation template for this code.
 
 ```
-$ cdk synth
+$ cdk --context env=dev synth
 ```
 
 To add additional dependencies, for example other CDK libraries, just add
@@ -74,7 +74,7 @@ execute the validations by running `pre-commit run --all-files`.
 
 Verify CDK to Cloudformation conversion by running [cdk synth]:
 ```text
-cdk synth
+cdk --context env=dev synth
 ```
 The Cloudformation output is saved to the `cdk.out` folder
 

app.py

@@ -11,19 +11,19 @@
 from openchallenges.load_balancer_stack import LoadBalancerStack
 from openchallenges.service_props import ServiceProps
 
-# get configs from file
+# get secrets from file
 configs = Properties()
 with open(".openchallenges", "rb") as config_file:
     configs.load(config_file)
 
-DNS_NAMESPACE = "openchallenges.io"
-VPC_CIDR = "10.255.92.0/24"
-
 app = cdk.App()
+env_context = app.node.try_get_context("dev")
 
 bucket_stack = BucketStack(app, "openchallenges-buckets")
-network_stack = NetworkStack(app, "openchallenges-network", VPC_CIDR)
-ecs_stack = EcsStack(app, "openchallenges-ecs", network_stack.vpc, DNS_NAMESPACE)
+network_stack = NetworkStack(app, "openchallenges-network", env_context["VPC_CIDR"])
+ecs_stack = EcsStack(
+    app, "openchallenges-ecs", network_stack.vpc, env_context["DNS_NAMESPACE"]
+)
 
 mariadb_props = ServiceProps(
     "openchallenges-mariadb",

cdk.json

@@ -62,6 +62,10 @@
     "@aws-cdk/aws-codepipeline:crossAccountKeysDefaultValueToFalse": true,
     "@aws-cdk/aws-codepipeline:defaultPipelineTypeToV2": true,
     "@aws-cdk/aws-kms:reduceCrossAccountRegionPolicyScope": true,
-    "@aws-cdk/aws-eks:nodegroupNameAttribute": true
+    "@aws-cdk/aws-eks:nodegroupNameAttribute": true,
+    "dev": {
+        "VPC_CIDR": "10.255.92.0/24",
+        "DNS_NAMESPACE": "openchallenges.io"
+      }
   }
 }

tests/unit/test_network_stack.py

@@ -0,0 +1,17 @@
+import aws_cdk as core
+import aws_cdk.assertions as assertions
+
+from openchallenges.network_stack import NetworkStack
+
+
+def test_vpc_created():
+    context = {
+        "dev": {"VPC_CIDR": "10.255.92.0/24", "DNS_NAMESPACE": "openchallenges.io"}
+    }
+
+    app = core.App(context=context)
+    env_context = app.node.try_get_context("dev")
+    vpc_cidr = env_context["VPC_CIDR"]
+    network = NetworkStack(app, "NetworkStack", vpc_cidr)
+    template = assertions.Template.from_stack(network)
+    template.has_resource_properties("AWS::EC2::VPC", {"CidrBlock": vpc_cidr})