parameterize log group, maxevent, and lambda role name

tools/lambda-promtail/template.yaml

@@ -13,6 +13,10 @@ Parameters:
     Description: The maximum of concurrent executions you want to reserve for the function.
     Type: Number
     Default: 2
+  MaximumEventAgeInSeconds:
+    Description: The maximum age of a request that Lambda sends to a function for processing.
+    Type: Number
+    Default: 21600
   Username:
     Description: The basic auth username, necessary if writing directly to Grafana Cloud Loki.
     Type: String
@@ -51,6 +55,14 @@ Parameters:
     Description: Determines whether to verify the TLS certificate
     Type: String
     Default: "false"
+  LogGroupName:
+    Description: Name of the CloudWatch Log Group to subscribe from.
+    Type: String
+    Default: "/aws/lambda/some-lamda-log-group"
+  IAMRoleName:
+    Description: Name of the LambdaPromtailRole IAM Role.
+    Type: String
+    Default: "iam_for_lambda"
 
 Resources:
   LambdaPromtailRole:
@@ -59,26 +71,26 @@ Resources:
       AssumeRolePolicyDocument:
         Version: '2012-10-17'
         Statement:
-        - Effect: Allow
-          Principal:
-            Service:
-            - lambda.amazonaws.com
-          Action:
-          - sts:AssumeRole
-      Description: "Lambda Promtail Role"
-      Policies:
-      - PolicyName: logs
-        PolicyDocument:
-          Version: '2012-10-17'
-          Statement:
           - Effect: Allow
+            Principal:
+              Service:
+                - lambda.amazonaws.com
             Action:
-            - logs:CreateLogGroup
-            - logs:CreateLogStream
-            - logs:PutLogEvents
-            - logs:PutSubscriptionFilter
-            Resource: arn:aws:logs:*:*:*
-      RoleName: iam_for_lambda
+              - sts:AssumeRole
+      Description: "Lambda Promtail Role"
+      Policies:
+        - PolicyName: logs
+          PolicyDocument:
+            Version: '2012-10-17'
+            Statement:
+              - Effect: Allow
+                Action:
+                  - logs:CreateLogGroup
+                  - logs:CreateLogStream
+                  - logs:PutLogEvents
+                  - logs:PutSubscriptionFilter
+                Resource: arn:aws:logs:*:*:*
+      RoleName: !Ref IAMRoleName
   LambdaPromtailFunction:
     Type: AWS::Lambda::Function
     Properties:
@@ -119,6 +131,7 @@ Resources:
     Properties:
       FunctionName: !Ref LambdaPromtailFunction
       MaximumRetryAttempts: 2
+      MaximumEventAgeInSeconds: !Ref MaximumEventAgeInSeconds
       Qualifier: !GetAtt LambdaPromtailVersion.Version
   # Copy this block and modify as required to create Subscription Filters for
   # additional CloudWatch Log Groups.
@@ -128,9 +141,9 @@ Resources:
     Properties:
       DestinationArn: !GetAtt LambdaPromtailFunction.Arn
       FilterPattern: ""
-      LogGroupName: "/aws/lambda/some-lamda-log-group"
+      LogGroupName: !Ref LogGroupName
 
 Outputs:
   LambdaPromtailFunction:
     Description: "Lambda Promtail Function ARN"
-    Value: !GetAtt LambdaPromtailFunction.Arn
+    Value: !GetAtt LambdaPromtailFunction.Arn