LoadBalancer names cannot be longer then 32 characters..

Longer names will fail with:

 AmazonElasticLoadBalancingV2; Status Code: 400; Error Code: ValidationError;

 Fairly straight forward approach, truncate at 32 characters.
 Considering that we append "LoadBalancer" to every name and it is 12
 characters the name should stay useful. We can decide later if "LB" is
 better then a truncated "LoadBalan".

 The golden test data needed to be updated because its names were also
 over 32 characters.

 Fixes #160.

Signed-off-by: Nicolas De Loof <nicolas.deloof@gmail.com>

ecs/pkg/amazon/backend/cloudformation.go

@@ -218,7 +218,9 @@ func getLoadBalancerSecurityGroups(project *types.Project, template *cloudformat
 }
 
 func createLoadBalancer(project *types.Project, template *cloudformation.Template) string {
-	loadBalancerName := fmt.Sprintf("%sLoadBalancer", strings.Title(project.Name))
+
+	// load balancer names are limited to 32 characters total
+	loadBalancerName := fmt.Sprintf("%.32s", fmt.Sprintf("%sLoadBalancer", strings.Title(project.Name)))
 	// Create LoadBalancer if `ParameterLoadBalancerName` is not set
 	template.Conditions["CreateLoadBalancer"] = cloudformation.Equals("", cloudformation.Ref(ParameterLoadBalancerARN))
 

ecs/pkg/amazon/backend/cloudformation_test.go

@@ -34,7 +34,7 @@ func TestSimpleWithOverrides(t *testing.T) {
 }
 
 func TestRolePolicy(t *testing.T) {
-	template := convertYaml(t, `
+	template := convertYaml(t, "test", `
 version: "3"
 services:
   foo:
@@ -54,14 +54,14 @@ services:
 }
 
 func TestMapNetworksToSecurityGroups(t *testing.T) {
-	template := convertYaml(t, `
+	template := convertYaml(t, "test", `
 version: "3"
 services:
   test:
     image: hello_world
     networks:
-      - front-tier 
+      - front-tier
-      - back-tier 
+      - back-tier
 
 networks:
   front-tier:
@@ -79,7 +79,7 @@ networks:
 }
 
 func TestLoadBalancerTypeApplication(t *testing.T) {
-	template := convertYaml(t, `
+	template := convertYaml(t, "test123456789009876543211234567890", `
 version: "3"
 services:
   test:
@@ -89,12 +89,13 @@ services:
 `)
 	lb := template.Resources["TestLoadBalancer"].(*elasticloadbalancingv2.LoadBalancer)
 	assert.Check(t, lb != nil)
+	assert.Check(t, len(lb.Name) <= 32)
 	assert.Check(t, lb.Type == elbv2.LoadBalancerTypeEnumApplication)
 	assert.Check(t, len(lb.SecurityGroups) > 0)
 }
 
 func TestServiceReplicas(t *testing.T) {
-	template := convertYaml(t, `
+	template := convertYaml(t, "test", `
 version: "3"
 services:
   test:
@@ -108,7 +109,7 @@ services:
 }
 
 func TestLoadBalancerTypeNetwork(t *testing.T) {
-	template := convertYaml(t, `
+	template := convertYaml(t, "test", `
 version: "3"
 services:
   test:
@@ -123,7 +124,7 @@ services:
 }
 
 func TestServiceMapping(t *testing.T) {
-	template := convertYaml(t, `
+	template := convertYaml(t, "test", `
 version: "3"
 services:
   test:
@@ -163,7 +164,7 @@ func get(l []ecs.TaskDefinition_KeyValuePair, name string) string {
 }
 
 func TestResourcesHaveProjectTagSet(t *testing.T) {
-	template := convertYaml(t, `
+	template := convertYaml(t, "test", `
 version: "3"
 services:
   test:
@@ -207,7 +208,7 @@ func load(t *testing.T, paths ...string) *types.Project {
 	return project
 }
 
-func convertYaml(t *testing.T, yaml string) *cloudformation.Template {
+func convertYaml(t *testing.T, name string, yaml string) *cloudformation.Template {
 	dict, err := loader.ParseYAML([]byte(yaml))
 	assert.NilError(t, err)
 	model, err := loader.Load(types.ConfigDetails{

ecs/pkg/amazon/backend/testdata/simple/simple-cloudformation-with-overrides-conversion.golden

@@ -260,10 +260,10 @@
       },
       "Type": "AWS::EC2::SecurityGroupIngress"
     },
-    "TestSimpleWithOverridesLoadBalancer": {
+    "TestSimpleWithOverridesLoadBalan": {
       "Condition": "CreateLoadBalancer",
       "Properties": {
-        "Name": "TestSimpleWithOverridesLoadBalancer",
+        "Name": "TestSimpleWithOverridesLoadBalan",
         "Scheme": "internet-facing",
         "SecurityGroups": [
           {