Add Loadbalancer stickiness option (cloudposse#84)

* add lb stickiness options

* add variables for stickiness options

* update stickiness options in readme

* add stickiness option

* remove lb_cookie from default values

* Revert "remove lb_cookie from default values"

This reverts commit add7a91.

* remove stickiness type value

* add stickiness settings for classic lb

* remove policy name from stickiness option

* test remove alb stickiness config

* Revert "test remove alb stickiness config"

This reverts commit 44a15d4.

* remove stickiness type option

Author: bhegazy

README.md

@@ -128,6 +128,8 @@ Available targets:
 | ssh_listener_port | SSH port | string | `22` | no |
 | ssh_source_restriction | Used to lock down SSH access to the EC2 instances. | string | `0.0.0.0/0` | no |
 | stage | Stage, e.g. 'prod', 'staging', 'dev', or 'test' | string | - | yes |
+| stickiness_enabled | Set to true to enable sticky sessions. This option is only applicable to environments with a classic load balancer or an application load balancer. | string | `false` | no |
+| stickiness_lb_cookie_duration | Lifetime, in seconds, of the sticky session cookie. This option is only applicable to environments with a classic load balancer or an application load balancer. | string | `86400` | no |
 | tags | Additional tags (e.g. `map('BusinessUnit`,`XYZ`) | map | `<map>` | no |
 | tier | Elastic Beanstalk Environment tier, e.g. ('WebServer', 'Worker') | string | `WebServer` | no |
 | update_level | The highest level of update to apply with managed platform updates | string | `minor` | no |

docs/terraform.md

@@ -65,6 +65,8 @@
 | ssh_listener_port | SSH port | string | `22` | no |
 | ssh_source_restriction | Used to lock down SSH access to the EC2 instances. | string | `0.0.0.0/0` | no |
 | stage | Stage, e.g. 'prod', 'staging', 'dev', or 'test' | string | - | yes |
+| stickiness_enabled | Set to true to enable sticky sessions. This option is only applicable to environments with a classic load balancer or an application load balancer. | string | `false` | no |
+| stickiness_lb_cookie_duration | Lifetime, in seconds, of the sticky session cookie. This option is only applicable to environments with a classic load balancer or an application load balancer. | string | `86400` | no |
 | tags | Additional tags (e.g. `map('BusinessUnit`,`XYZ`) | map | `<map>` | no |
 | tier | Elastic Beanstalk Environment tier, e.g. ('WebServer', 'Worker') | string | `WebServer` | no |
 | update_level | The highest level of update to apply with managed platform updates | string | `minor` | no |

main.tf

@@ -998,6 +998,29 @@ resource "aws_elastic_beanstalk_environment" "default" {
     name      = "Protocol"
     value     = "HTTP"
   }
+  ###===================== Load Balancer stickiness settings =====================================================###
+  setting {
+    namespace = "aws:elasticbeanstalk:environment:process:default"
+    name      = "StickinessEnabled"
+    value     = "${var.stickiness_enabled}"
+  }
+  setting {
+    namespace = "aws:elasticbeanstalk:environment:process:default"
+    name      = "StickinessLBCookieDuration"
+    value     = "${var.stickiness_lb_cookie_duration}"
+  }
+  # This should make it work with Classic Load balancer
+  # https://github.com/terraform-providers/terraform-provider-aws/issues/4000
+  setting {
+    namespace = "aws:elb:policies"
+    name      = "Stickiness Policy"
+    value     = "${var.stickiness_enabled}"
+  }
+  setting {
+    namespace = "aws:elb:policies"
+    name      = "Stickiness Cookie Expiration"
+    value     = "${var.stickiness_lb_cookie_duration}"
+  }
 
   ###===================== Notification =====================================================###
 

variables.tf

@@ -142,6 +142,16 @@ variable "application_port" {
   description = "Port application is listening on"
 }
 
+variable "stickiness_enabled" {
+  default     = "false"
+  description = "Set to true to enable sticky sessions"
+}
+
+variable "stickiness_lb_cookie_duration" {
+  default     = "86400"
+  description = "Lifetime, in seconds, of the sticky session cookie"
+}
+
 variable "ssh_listener_enabled" {
   default     = "false"
   description = "Enable ssh port"