Error: Error creating IAM Role lambda-notify_slack: EntityAlreadyExists: Role with name lambda-notify_slack already exists.
	status code: 409, request id: f1f0c7d6-68c7-49ab-962b-b0b00615cdce

Error: Creating CloudWatch Log Group failed: ResourceAlreadyExistsException: The specified log group already exists:  The CloudWatch Log Group '/aws/lambda/notify_slack' already exists.

Once for_each is implemented, then a list of slack_channel can be passed in.

# for_each was supposed to be released in 0.12, still not in 0.12.29 release. 
module "notify_slack" {
  for_each   = var.slack_channel
  source  = "terraform-aws-modules/notify-slack/aws"
  version = "~> v3.5.0"

  sns_topic_name    = "slack-${each.key}"
  slack_channel     = each.key
  slack_username    = var.slack_username == "" ? var.environment : var.slack_username
  slack_webhook_url = var.slack_webhook_url
}

$ git diff
diff --git a/main.tf b/main.tf
index 4a0ee36..7398989 100644
--- a/main.tf
+++ b/main.tf
@@ -30,8 +30,6 @@ locals {
     actions   = ["kms:Decrypt"]
     resources = [var.kms_key_arn]
   }
-
-  lambda_function_name  = var.lambda_function_name == "" ? "${var.sns_topic_name}" : var.lambda_function_name
 }
 
 data "aws_iam_policy_document" "lambda" {
@@ -51,7 +49,7 @@ data "aws_iam_policy_document" "lambda" {
 resource "aws_cloudwatch_log_group" "lambda" {
   count = var.create ? 1 : 0
 
-  name              = "/aws/lambda/${local.lambda_function_name}"
+  name              = "/aws/lambda/${var.lambda_function_name}"
   retention_in_days = var.cloudwatch_log_group_retention_in_days
   kms_key_id        = var.cloudwatch_log_group_kms_key_id
 
@@ -73,7 +71,7 @@ module "lambda" {
 
   create = var.create
 
-  function_name = local.lambda_function_name
+  function_name = var.lambda_function_name
   description   = var.lambda_description
 
   handler                        = "notify_slack.lambda_handler"
@@ -95,7 +93,7 @@ module "lambda" {
   }
 
   create_role               = true
-  role_name                 = "${var.iam_role_name_prefix}-${local.lambda_function_name}"
+  role_name                 = "${var.iam_role_name_prefix}-${var.lambda_function_name}"
   role_permissions_boundary = var.iam_role_boundary_policy_arn
   role_tags                 = var.iam_role_tags
 
diff --git a/variables.tf b/variables.tf
index 19298ca..fbcfe97 100644
--- a/variables.tf
+++ b/variables.tf
@@ -13,7 +13,7 @@ variable "create_sns_topic" {
 variable "lambda_function_name" {
   description = "The name of the Lambda function to create"
   type        = string
-  default     = ""
+  default     = "notify_slack"
 }
 
 variable "lambda_description" {

terraform {
  required_version = ">= 1.0.0, < 2.0.0"
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 3.27"
    }
  }
}

provider "aws" {
  profile = "default"
  region  = "us-west-1"
}

terraform {
  backend "s3" {
    bucket         = "<bucket name>"
    key            = "aws-notify-slack-test"
    region         = "us-west-1"
  }
}

module "notify_slack_test" {
  source               = "terraform-aws-modules/notify-slack/aws"
  version              = "4.18"

  sns_topic_name       = "terraform-aws-modules-notify-slack-test"
  lambda_function_name = "terraform-aws-modules-notify-slack-test"
  slack_webhook_url    = var.slack_webhook_url
  slack_channel        = "test"
  slack_username       = "AWS (terraform-aws-modules-notify-slack-test)"
  slack_emoji          = ":warning:"
  create               = true
  create_sns_topic     = true
}

Error: Error refreshing state: 1 error(s) occurred:

* module.notify_slack.data.aws_iam_policy_document.lambda: data.aws_iam_policy_document.lambda: value of 'count' cannot be computed

resource "aws_kms_key" "this" {
  description = "KMS key for notify-slack test"
}

resource "aws_kms_alias" "this" {
  name          = "alias/kms-test-key"
  target_key_id = "${aws_kms_key.this.id}"
}

data "aws_kms_ciphertext" "slack_url" {
  # i'm aware this is wrong :)
  plaintext = "https://hooks.slack.com/services/AAA/BBB/CCC"
  # or?
  # key_id    = "${aws_kms_key.this.key_id}"
  key_id    = "${aws_kms_key.this.arn}"
}

module "notify_slack" {
  source = "terraform-aws-modules/notify-slack/aws"
  version = "1.3.0"

  sns_topic_name = "slack-topic"

  slack_webhook_url = "${data.aws_kms_ciphertext.slack_url.ciphertext_blob}"
  slack_channel     = "aws-notification"
  slack_username    = "reporter"

  kms_key_arn = "${aws_kms_key.this.arn}"
}

resource "aws_cloudwatch_metric_alarm" "LambdaDuration" {
  alarm_name          = "NotifySlackDuration"
  comparison_operator = "GreaterThanOrEqualToThreshold"
  evaluation_periods  = "1"
  metric_name         = "Duration"
  namespace           = "AWS/Lambda"
  period              = "60"
  statistic           = "Average"
  threshold           = "5000"
  alarm_description   = "Duration of notifying slack exceeds threshold"

  alarm_actions = ["${module.notify_slack.this_slack_topic_arn}"]

  dimensions {
    FunctionName = "${module.notify_slack.notify_slack_lambda_function_name}"
  }
}

# module.notify_slack.aws_cloudwatch_log_group.lambda[0] will be created
  + resource "aws_cloudwatch_log_group" "lambda" {
      + arn               = (known after apply)
      + id                = (known after apply)
      + name              = "/aws/lambda/slack-notifications"
      + retention_in_days = 0
    }

# module.notify_slack.module.lambda.aws_cloudwatch_log_group.lambda[0] will be created
  + resource "aws_cloudwatch_log_group" "lambda" {
      + arn               = (known after apply)
      + id                = (known after apply)
      + name              = "/aws/lambda/slack-notifications"
      + retention_in_days = 0
      + tags              = {
          + "Terraform"    = "true"
        }
    }

Error: Creating CloudWatch Log Group failed: ResourceAlreadyExistsException: The specified log group already exists:  The CloudWatch Log Group '/aws/lambda/slack-notifications' already exists.

  on .terraform/modules/notify_slack.lambda/terraform-aws-lambda-1.18.0/main.tf line 109, in resource "aws_cloudwatch_log_group" "lambda":
 109: resource "aws_cloudwatch_log_group" "lambda" {

Terraform v1.0.9
on darwin_amd64

+ provider registry.terraform.io/hashicorp/aws v3.74.0
+ provider registry.terraform.io/hashicorp/external v2.2.0
+ provider registry.terraform.io/hashicorp/local v2.1.0
+ provider registry.terraform.io/hashicorp/null v3.1.0
+ provider registry.terraform.io/hashicorp/template v2.2.0

resource "aws_kms_ciphertext" "slack_url" {
  count     = terraform.workspace == "prod" ? 1 : 0
  plaintext = "https://hooks.slack.com/services/TC________ss"
  key_id    = aws_kms_key.notify_slack[count.index].arn
}

module "notify_slack" {
  count   = terraform.workspace == "prod" ? 1 : 0
  source  = "terraform-aws-modules/notify-slack/aws"
  version = "~> 4.0"

  sns_topic_name = "slack-sns-topic"

  slack_webhook_url = aws_kms_ciphertext.slack_url[count.index].ciphertext_blob
  slack_channel     = "foo_alerts"
  slack_username    = "CloudWatch"

  kms_key_arn = aws_kms_key.notify_slack[count.index].arn

  lambda_description = "Lambda function which sends notifications to Slack"
  log_events         = true

  tags = {
    Name = "cloudwatch-alerts-to-slack"
  }
}

Error: Duplicate variable declaration
│
│   on .terraform/modules/notify_slack/variables.tf line 135:
│  135: variable "lambda_function_tags" {
│
│ A variable named "lambda_function_tags" was already declared at .terraform/modules/notify_slack/variables 2.tf:135,1-32. Variable names must be unique within a module.
╵
╷
│ Error: Duplicate variable declaration
│
│   on .terraform/modules/notify_slack/variables.tf line 141:
│  141: variable "lambda_function_vpc_subnet_ids" {
│
│ A variable named "lambda_function_vpc_subnet_ids" was already declared at .terraform/modules/notify_slack/variables 2.tf:141,1-42. Variable names must be unique within a module.
╵
╷
│ Error: Duplicate variable declaration
│
│   on .terraform/modules/notify_slack/variables.tf line 147:
│  147: variable "lambda_function_vpc_security_group_ids" {
│
│ A variable named "lambda_function_vpc_security_group_ids" was already declared at .terraform/modules/notify_slack/variables 2.tf:147,1-50. Variable names must be unique within a module.
╵
╷
│ Error: Duplicate variable declaration
│
│   on .terraform/modules/notify_slack/variables.tf line 153:
│  153: variable "lambda_function_store_on_s3" {
│
│ A variable named "lambda_function_store_on_s3" was already declared at .terraform/modules/notify_slack/variables 2.tf:153,1-39. Variable names must be unique within a module.
╵
╷
│ Error: Duplicate variable declaration
│
│   on .terraform/modules/notify_slack/variables.tf line 159:
│  159: variable "lambda_function_s3_bucket" {
│
│ A variable named "lambda_function_s3_bucket" was already declared at .terraform/modules/notify_slack/variables 2.tf:159,1-37. Variable names must be unique within a module.
╵
╷
│ Error: Duplicate variable declaration
│
│   on .terraform/modules/notify_slack/variables.tf line 165:
│  165: variable "sns_topic_tags" {
│
│ A variable named "sns_topic_tags" was already declared at .terraform/modules/notify_slack/variables 2.tf:165,1-26. Variable names must be unique within a module.
╵
╷
│ Error: Duplicate variable declaration
│
│   on .terraform/modules/notify_slack/variables.tf line 171:
│  171: variable "cloudwatch_log_group_tags" {
│
│ A variable named "cloudwatch_log_group_tags" was already declared at .terraform/modules/notify_slack/variables 2.tf:171,1-37. Variable names must be unique within a module.
╵
╷
│ Error: Duplicate variable declaration
│
│   on .terraform/modules/notify_slack/variables.tf line 177:
│  177: variable "subscription_filter_policy" {
│
│ A variable named "subscription_filter_policy" was already declared at .terraform/modules/notify_slack/variables 2.tf:177,1-38. Variable names must be unique within a module.
╵
╷
│ Error: Duplicate required providers configuration
│
│   on .terraform/modules/notify_slack/versions.tf line 4, in terraform:
│    4:   required_providers {
│
│ A module may have only one required providers configuration. The required providers were previously configured at .terraform/modules/notify_slack/versions 2.tf:4,3-21.

Error: Creating CloudWatch Log Group failed: ResourceAlreadyExistsException: The specified log group already exists:  The CloudWatch Log Group '/aws/lambda/notify_slack' already exists.

module "notify_slack" {
  for_each = toset([
    "builds-develop",
    "builds-release",
    "builds-misc"
  ])

  source  = "terraform-aws-modules/notify-slack/aws"
  version = "~> 4.0"

  lambda_function_name = "${each.key}-slack"
  sns_topic_name       = "${each.key}-slack"
  slack_webhook_url    = "https://coolurl"
  slack_channel        = each.key
  slack_username       = "Jenkins"
}

Error: failed to execute "python3": Traceback (most recent call last):
  File ".terraform/modules/notify_slack.lambda/package.py", line 1228, in <module>
    main()
  File ".terraform/modules/notify_slack.lambda/package.py", line 1224, in main
    exit(args.command(args))
  File ".terraform/modules/notify_slack.lambda/package.py", line 1068, in prepare_command
    os.makedirs(artifacts_dir)
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/os.py", line 221, in makedirs
    mkdir(name, mode)
FileExistsError: [Errno 17] File exists: 'builds'




Error: failed to execute "python3": Traceback (most recent call last):
  File ".terraform/modules/notify_slack.lambda/package.py", line 1228, in <module>
    main()
  File ".terraform/modules/notify_slack.lambda/package.py", line 1224, in main
    exit(args.command(args))
  File ".terraform/modules/notify_slack.lambda/package.py", line 1068, in prepare_command
    os.makedirs(artifacts_dir)
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/os.py", line 221, in makedirs
    mkdir(name, mode)
FileExistsError: [Errno 17] File exists: 'builds'

To work with
module.infra.module.slack_notification.module.cloudwatch_event_notification.data.archive_file.notify_slack[0]
its original provider configuration at
provider["registry.terraform.io/-/archive"] is required, but it has been
removed. This occurs when a provider configuration is removed while objects
created by that provider still exist in the state. Re-add the provider
configuration to destroy
module.infra.module.slack_notification.module.cloudwatch_event_notification.data.archive_file.notify_slack[0],
after which you can remove the provider configuration again.

  ~ resource "aws_iam_policy" "additional_json" {
        arn    = "arn:aws:iam::XXXX:policy/notify_slack"
        id     = "arn:aws:iam::XXXX:policy/notify_slack"
        name   = "notify_slack"
        path   = "/"
      ~ policy = jsonencode(
          ~ {
              ~ Statement = [
                  ~ {
                        Action   = [
                            "logs:PutLogEvents",
                            "logs:CreateLogStream",
                        ]
                        Effect   = "Allow"
                      ~ Resource = "arn:aws:logs:eu-central-1:XXXX:log-group:/aws/lambda/notify_slack:*" -> "arn:aws:logs:eu-central-1:XXXX:log-group:/aws/lambda/notify_slack"
                        Sid      = "AllowWriteToCloudwatchLogs"
                    },
                ]
                Version   = "2012-10-17"
            }
        )
    }

module "notify_slack_module" {
  source = "github.com/terraform-aws-modules/terraform-aws-notify-slack.git?ref=v3.0.0"
  sns_topic_name    = var.some_topic
  slack_webhook_url = var.slack_webhook_url
  slack_channel     = var.slack_channel
  slack_username    = var.slack_username
  lambda_function_name = "function_name"
}

  # module.notify_slack_module.module.lambda.null_resource.archive[0] must be replaced
-/+ resource "null_resource" "archive" {
      ~ id       = "5201291547049430426" -> (known after apply)
      ~ triggers = { # forces replacement
            "filename"  = "builds/d75764cc658ab477397eb09fabff2b67473cfe1246224a1e50360327a2c8e7a3.zip"
          ~ "timestamp" = "1591642297725210000" -> "1591643174300057800"
        }
    }

* module.notify_slack.aws_lambda_function.notify_slack: 1 error(s) occurred:

* aws_lambda_function.notify_slack: Unable to load "/Users/srutner/infrastructure/terraform/providers/aws/us_east_1_dev/.terraform/modules/8e09be21bce706ab71a4446c9c3501c9/terraform-aws-modules-terraform-aws-notify-slack-cd06615/functions/notify_slack.zip": open /Users/srutner/infrastructure/terraform/providers/aws/us_east_1_dev/.terraform/modules/8e09be21bce706ab71a4446c9c3501c9/terraform-aws-modules-terraform-aws-notify-slack-cd06615/functions/notify_slack.zip: no such file or directory

Expecting value: line 1 column 1 (char 0): JSONDecodeError
Traceback (most recent call last):
File "/var/task/notify_slack.py", line 76, in lambda_handler
message = json.loads(event['Records'][0]['Sns']['Message'])
File "/var/lang/lib/python3.6/json/__init__.py", line 354, in loads
return _default_decoder.decode(s)
File "/var/lang/lib/python3.6/json/decoder.py", line 339, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/var/lang/lib/python3.6/json/decoder.py", line 357, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Error: Provider configuration not present

To work with
module.tivo_cluster.module.notify-slack.module.lambda.data.aws_caller_identity.current[0]
its original provider configuration at
module.tivo_cluster.provider["registry.terraform.io/-/aws"] is required, but
it has been removed. This occurs when a provider configuration is removed
while objects created by that provider still exist in the state. Re-add the
provider configuration to destroy
module.tivo_cluster.module.notify-slack.module.lambda.data.aws_caller_identity.current[0],
after which you can remove the provider configuration again.


Error: Provider configuration not present

To work with
module.tivo_cluster.module.notify-slack.module.lambda.data.aws_partition.current[0]
its original provider configuration at
module.tivo_cluster.provider["registry.terraform.io/-/aws"] is required, but
it has been removed. This occurs when a provider configuration is removed
while objects created by that provider still exist in the state. Re-add the
provider configuration to destroy
module.tivo_cluster.module.notify-slack.module.lambda.data.aws_partition.current[0],
after which you can remove the provider configuration again.


Error: Provider configuration not present

To work with
module.tivo_cluster.module.notify-slack.module.lambda.data.aws_region.current[0]
its original provider configuration at
module.tivo_cluster.provider["registry.terraform.io/-/aws"] is required, but
it has been removed. This occurs when a provider configuration is removed
while objects created by that provider still exist in the state. Re-add the
provider configuration to destroy
module.tivo_cluster.module.notify-slack.module.lambda.data.aws_region.current[0],
after which you can remove the provider configuration again.

  required_providers {
    aws = ">= 2.35, < 4.0"
  }

  required_providers {
    aws = {
      source = "hashicorp/aws"
      version = ">= 2.35, < 4.0"
    }
  }

Error: failed to execute "python3": Traceback (most recent call last):
  File ".terraform/modules/notify_slack.lambda/terraform-aws-lambda-1.6.0/package.py", line 6, in <module>
    raise RuntimeError("A python version 3.7 or newer is required")
RuntimeError: A python version 3.7 or newer is required


  on .terraform/modules/notify_slack.lambda/terraform-aws-lambda-1.6.0/package.tf line 3, in data "external" "archive_prepare":
   3: data "external" "archive_prepare" {

module.notify_slack["my_app"].module.lambda.null_resource.archive[0]: Destroying... [id=8360185324643769328]
module.notify_slack["my_app"].module.lambda.null_resource.archive[0]: Destruction complete after 0s
module.notify_slack["my_app"].module.lambda.data.external.archive_prepare[0]: Reading... [id=-]
module.notify_slack["my_app"].module.lambda.data.external.archive_prepare[0]: Read complete after 0s [id=-]
aws_autoscaling_notification.an["my_app"]: Creating...
module.notify_slack["my_app"].module.lambda.null_resource.archive[0]: Creating...
module.notify_slack["my_app"].module.lambda.null_resource.archive[0]: Provisioning with 'local-exec'...
module.notify_slack["my_app"].module.lambda.null_resource.archive[0] (local-exec): Executing: ["python3" ".terraform/modules/notify_slack.lambda/package.py" "build" "--timestamp" "1605787059469616800" "builds/5b24c39941d01dbddea733983e6a591d958660e6eeb0fcd7965098fb348aeeaa.plan.json"]
module.notify_slack["my_app"].module.lambda.null_resource.archive[0] (local-exec): Traceback (most recent call last):
module.notify_slack["my_app"].module.lambda.null_resource.archive[0] (local-exec):   File ".terraform/modules/notify_slack.lambda/package.py", line 1246, in <module>
module.notify_slack["my_app"].module.lambda.null_resource.archive[0] (local-exec):     main()
module.notify_slack["my_app"].module.lambda.null_resource.archive[0] (local-exec):   File ".terraform/modules/notify_slack.lambda/package.py", line 1242, in main
module.notify_slack["my_app"].module.lambda.null_resource.archive[0] (local-exec):     exit(args.command(args))
module.notify_slack["my_app"].module.lambda.null_resource.archive[0] (local-exec):   File ".terraform/modules/notify_slack.lambda/package.py", line 1113, in build_command
module.notify_slack["my_app"].module.lambda.null_resource.archive[0] (local-exec):     with open(args.build_plan_file) as f:
module.notify_slack["my_app"].module.lambda.null_resource.archive[0] (local-exec): FileNotFoundError: [Errno 2] No such file or directory: 'builds/5b24c39941d01dbddea733983e6a591d958660e6eeb0fcd7965098fb348aeeaa.plan.json'
aws_autoscaling_notification.an["my_app"]: Creation complete after 0s [id=arn:aws:sns:eu-west-1:380983831295:my_app]
Error: Error running command 'builds/5b24c39941d01dbddea733983e6a591d958660e6eeb0fcd7965098fb348aeeaa.plan.json': exit status 1. Output: Traceback (most recent call last):
  File ".terraform/modules/notify_slack.lambda/package.py", line 1246, in <module>
    main()
  File ".terraform/modules/notify_slack.lambda/package.py", line 1242, in main
    exit(args.command(args))
  File ".terraform/modules/notify_slack.lambda/package.py", line 1113, in build_command
    with open(args.build_plan_file) as f:
FileNotFoundError: [Errno 2] No such file or directory: 'builds/5b24c39941d01dbddea733983e6a591d958660e6eeb0fcd7965098fb348aeeaa.plan.json'

15:43:05
START RequestId: 10f8c40c-7e40-485f-a04e-1a9ae36c3586 Version: $LATEST

15:43:05
[ERROR] 2019-11-20T15:43:05.132Z 10f8c40c-7e40-485f-a04e-1a9ae36c3586 JSON decode error: Expecting value: line 1 column 1 (char 0)

15:43:05
Traceback (most recent call last):

15:43:05
File "/var/task/notify_slack.py", line 64, in notify_slack

15:43:05
message = json.loads(message)

15:43:05
File "/var/lang/lib/python3.7/json/__init__.py", line 348, in loads

15:43:05
return _default_decoder.decode(s)

15:43:05
File "/var/lang/lib/python3.7/json/decoder.py", line 337, in decode

15:43:05
obj, end = self.raw_decode(s, idx=_w(s, 0).end())

15:43:05
File "/var/lang/lib/python3.7/json/decoder.py", line 355, in raw_decode

15:43:05
raise JSONDecodeError("Expecting value", s, err.value) from None

15:43:05
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

15:43:05
[ERROR] HTTPError: HTTP Error 404: Not Found Traceback (most recent call last):   File "/var/task/notify_slack.py", line 84, in lambda_handler     notify_slack(subject, message, region)   File "/var/task/notify_slack.py", line 77, in notify_slack     urllib.request.urlopen(req, data)   File "/var/lang/lib/python3.7/urllib/request.py", line 222, in urlopen     return opener.open(url, data, timeout)

15:43:05
END RequestId: 10f8c40c-7e40-485f-a04e-1a9ae36c3586

15:43:05
REPORT RequestId: 10f8c40c-7e40-485f-a04e-1a9ae36c3586 Duration: 381.32 ms Billed Duration: 400 ms Memory Size: 128 MB Max Memory Used: 72 MB Init Duration: 329.24 ms

terraform {
  required_version = ">= 0.15"
}
provider "aws" {
  region = "eu-west-1"
}

module "slack_notifications" {
  source  = "terraform-aws-modules/notify-slack/aws"
  version = "4.13.0"

  sns_topic_name = "topic-name"

  slack_webhook_url = "https://fake-url.com"
  slack_channel     = "some-channel"
  slack_username    = "AWS Cloud Watch - Dead-letter queue alarms"

  cloudwatch_log_group_retention_in_days = 14

  iam_role_name_prefix = ""

  lambda_function_name = "lambda-name"
  lambda_description   = "description"
}

│ Error: Error in function call
│
│   on .terraform/modules/slack_notifications.lambda/iam.tf line 23, in data "aws_iam_policy_document" "assume_role":
│   23:       identifiers = distinct(concat(slice(list("lambda.amazonaws.com", "edgelambda.amazonaws.com"), 0, var.lambda_at_edge ? 2 : 1), var.trusted_entities))
│
│ Call to function "list" failed: the "list" function was deprecated in
│ Terraform v0.12 and is no longer available; use tolist([ ... ]) syntax to
│ write a literal list.
╵
╷
│ Error: Error in function call
│
│   on .terraform/modules/slack_notifications.lambda/outputs.tf line 98, in output "s3_object":
│   98:   value       = map("bucket", local.s3_bucket, "key", local.s3_key, "version_id", local.s3_object_version)
│     ├────────────────
│     │ local.s3_bucket is a string, known only after apply
│     │ local.s3_key will be known only after apply
│     │ local.s3_object_version will be known only after apply
│
│ Call to function "map" failed: the "map" function was deprecated in
│ Terraform v0.12 and is no longer available; use tomap({ ... }) syntax to
│ write a literal map.
|
│ Error: Error in function call
│
│   on .terraform/modules/slack_notifications/main.tf line 29, in locals:
│   29:     resources = [replace("${element(concat(aws_cloudwatch_log_group.lambda[*].arn, list("")), 0)}:*", ":*:*", ":*")]
│
│ Call to function "list" failed: the "list" function was deprecated in
│ Terraform v0.12 and is no longer available; use tolist([ ... ]) syntax to
│ write a literal list.

[DEBUG] provider.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = transport is closing"
[DEBUG] provider: plugin process exited: path=.terraform/providers/registry.terraform.io/hashicorp/random/3.1.0/linux_amd64/terraform-provider-random_v3.1.0_x5 pid=9848
[DEBUG] provider: plugin exited
[DEBUG] provider.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = transport is closing"
[DEBUG] provider: plugin process exited: path=.terraform/providers/registry.terraform.io/hashicorp/archive/2.2.0/linux_amd64/terraform-provider-archive_v2.2.0_x5 pid=9836
[DEBUG] provider: plugin exited
[DEBUG] provider: plugin process exited: path=.terraform/providers/registry.terraform.io/hashicorp/template/2.2.0/linux_amd64/terraform-provider-template_v2.2.0_x4 pid=9798
[DEBUG] provider: plugin exited
[DEBUG] provider.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = transport is closing"
[DEBUG] provider: plugin process exited: path=.terraform/providers/registry.terraform.io/hashicorp/external/2.2.0/linux_amd64/terraform-provider-external_v2.2.0_x5 pid=9824
[DEBUG] provider: plugin exited
[DEBUG] provider.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = transport is closing"
[DEBUG] provider: plugin process exited: path=.terraform/providers/registry.terraform.io/hashicorp/local/2.1.0/linux_amd64/terraform-provider-local_v2.1.0_x5 pid=9886
[DEBUG] provider: plugin exited
[DEBUG] provider.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = transport is closing"
[DEBUG] provider: plugin process exited: path=.terraform/providers/registry.terraform.io/hashicorp/null/3.1.0/linux_amd64/terraform-provider-null_v3.1.0_x5 pid=9785
[DEBUG] provider: plugin exited
[DEBUG] provider.stdio: received EOF, stopping recv loop: err="rpc error: code = Unavailable desc = transport is closing"
[DEBUG] provider: plugin process exited: path=.terraform/providers/registry.terraform.io/hashicorp/aws/4.2.0/linux_amd64/terraform-provider-aws_v4.2.0_x5 pid=9872
[DEBUG] provider: plugin exited

slack_channel     = "aws-notification"
slack_username    = "reporter"
slack_emoji       = ":thing:"

Given a version number MAJOR.MINOR.PATCH, increment the:

MAJOR version when you make incompatible API changes,
MINOR version when you add functionality in a backwards compatible manner

resource "aws_sns_topic" "my_sns" {
  name  = "my-sns"
}

module "notify_slack" {
  source  = "terraform-aws-modules/notify-slack/aws"
  version = "2.0.0"
  slack_channel        = "my_channel"
  slack_username       = "My SNS"
  slack_webhook_url    = "https://hooks.slack.com/services/<SNIP>"
  sns_topic_name       = aws_sns_topic.my_sns.name  #<<<<<<<
  create_sns_topic     = false                #<<<<<<<<<
  slack_emoji          = ":yuk:"
  lambda_function_name = "${var.name_prefix}-my-slack-lambda"
}

$ terraform apply 
module.notify_slack.aws_cloudwatch_log_group.lambda[0]: Creating...
module.notify_slack.aws_sns_topic.this[0]: Creating...
aws_cloudwatch_log_group.lambda[0]: Creating...
module.notify_slack.aws_iam_role.lambda[0]: Creating...
aws_iam_role.lambda[0]: Creating...
aws_sns_topic.this[0]: Creating...
aws_cloudwatch_log_group.lambda[0]: Creation complete after 3s [id=/aws/lambda/notify_slack]
data.aws_iam_policy_document.lambda[0]: Refreshing state...
module.notify_slack.aws_sns_topic.this[0]: Creation complete after 3s [id=arn:aws:sns:eu-west-2:2603123456:slack-topic]
aws_sns_topic.this[0]: Creation complete after 3s [id=arn:aws:sns:eu-west-2:2603123456:slack-topic]
module.notify_slack.aws_iam_role.lambda[0]: Creation complete after 3s [id=lambda20200105142156051900000001]
aws_iam_role.lambda[0]: Creation complete after 3s [id=lambda20200105142156052100000002]
aws_iam_role_policy.lambda[0]: Creating...
aws_lambda_function.notify_slack[0]: Creating...
aws_iam_role_policy.lambda[0]: Creation complete after 3s [id=lambda20200105142156052100000002:lambda-policy-20200105142159112700000003]
aws_lambda_function.notify_slack[0]: Still creating... [10s elapsed]
aws_lambda_function.notify_slack[0]: Still creating... [20s elapsed]
aws_lambda_function.notify_slack[0]: Creation complete after 22s [id=notify_slack]
aws_sns_topic_subscription.sns_notify_slack[0]: Creating...
aws_lambda_permission.sns_notify_slack[0]: Creating...
aws_lambda_permission.sns_notify_slack[0]: Creation complete after 2s [id=AllowExecutionFromSNS]
aws_sns_topic_subscription.sns_notify_slack[0]: Creation complete after 3s [id=arn:aws:sns:eu-west-2:2603123456:slack-topic:c0afe839-0b4b-4d44-b5ec-19df0a00fee4]

Error: Creating CloudWatch Log Group failed: OperationAbortedException: A conflicting operation is currently in progress against this resource. Please try again.
	status code: 400, request id: 67b61c29-cd84-4b01-bbd8-3e645d2c084e '/aws/lambda/notify_slack'

  on .terraform/modules/notify_slack/terraform-aws-modules-terraform-aws-notify-slack-415fe44/main.tf line 26, in resource "aws_cloudwatch_log_group" "lambda":
  26: resource "aws_cloudwatch_log_group" "lambda" {

Error: Error applying plan:

1 error(s) occurred:

* module.databases.module.rds_notify_slack.module.notify_slack.aws_lambda_function.notify_slack: 1 error(s) occurred:

* aws_lambda_function.notify_slack: Unable to load ".terraform/modules/3a5c185cc1a32f4eca766d82a36b2ef2/functions/notify_slack.zip": open .terraform/modules/3a5c185cc1a32f4eca766d82a36b2ef2/functions/notify_slack.zip: no such file or directory

Terraform does not automatically rollback in the face of errors.
Instead, your Terraform state file has been partially updated with
any resources that successfully completed. Please address the error
above and apply again to incrementally change your infrastructure.

module "notify_slack" {
  source               = "git::https://github.com/terraform-aws-modules/terraform-aws-notify-slack?ref=tags/v1.10.0"
  create               = "${var.create}"
  create_sns_topic     = "${var.create_sns_topic}"
  create_with_kms_key  = "${var.create_with_kms_key}"
  slack_webhook_url    = "${var.slack_webhook_url}"
  slack_channel        = "${var.slack_channel}"
  slack_username       = "${var.slack_username}"
  slack_emoji          = "${var.slack_emoji}"
  kms_key_arn          = "${var.kms_key_arn}"
  sns_topic_name       = "${var.sns_topic_name}"
}

module "rds_notify_slack" {
  source            = "../notify_slack"
  slack_webhook_url = "https://hooks.slack.com/services/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"
  slack_channel     = "aws-rds-backup"
  slack_username    = "aws-notify"
  sns_topic_name    = "${terraform.workspace}-rds-events"
  create_sns_topic  = true
}

  on .terraform/modules/....notify-slack/terraform-aws-modules-terraform-aws-notify-slack-415fe44/iam.tf line 9, in locals:
   9:     resources = [aws_cloudwatch_log_group.lambda[0].arn]
    |----------------
    | aws_cloudwatch_log_group.lambda is empty tuple

The given key does not identify an element in this collection value.

  ~ module.notify_slack_engineering.aws_lambda_function.notify_slack
      filename:           "/Users/foo/src/project/.terraform/modules/d040de6279d8f75cc8478e75c8a39e23/terraform-aws-modules-terraform-aws-notify-slack-5cdd039/functions/notify_slack.zip" => "/Users/bar/src/project/.terraform/modules/d040de6279d8f75cc8478e75c8a39e23/terraform-aws-modules-terraform-aws-notify-slack-5cdd039/functions/notify_slack.zip"
      last_modified:      "2018-04-17T23:20:20.668+0000" => <computed>