Difference between revisions of "Terraform meta argument: count"
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↑ https://www.terraform.io/docs/language/meta-arguments/count.html
↑ https://registry.terraform.io/modules/terraform-aws-modules/s3-bucket/aws/latest
m (Welcome moved page Terraform: count to Terraform meta argument: count) |
(→Error) |
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| (33 intermediate revisions by 6 users not shown) | |||
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| − | * https://www.terraform.io/docs/language/meta-arguments/count.html | + | * <code>count</code> <ref>https://www.terraform.io/docs/language/meta-arguments/count.html</ref> [[meta argument]] |
| − | *<code>count = [[length]](var.[[subnet_ids]])</code> | + | * count.index |
| − | *<code>[[count]] = var.[[vpc_cidr_block]] != null ? 1 : 0</code> | + | |
| + | == Examples == | ||
| + | * <code> count = [[length]](var.[[subnet_ids]])</code> | ||
| + | * <code> [[count]] = var.[[vpc_cidr_block]] != null ? 1 : 0</code> | ||
| + | * <code>count = [[local.]]create_node_sg ? 1 : 0</code> | ||
| + | * <code> count = var.istest == true ? 3 : 0</code> | ||
| + | |||
| + | * <code> count = 0 </code> | ||
| + | |||
| + | Terraform does not allow to use count inside [[module block]].<ref>https://registry.terraform.io/modules/terraform-aws-modules/s3-bucket/aws/latest</ref> | ||
| + | |||
| + | resource "[[aws_instance]]" "dev" { | ||
| + | ami = "ami-082b5a644766e0e6f" | ||
| + | instance_type = "t2.micro" | ||
| + | count = 2 | ||
| + | } | ||
| + | |||
| + | resource "aws_instance" "your_new_instance_in_test" { | ||
| + | ami = "ami-082b5a644766e0e6f" | ||
| + | instance_type = "t2.micro" | ||
| + | count = [[var]].istest == true ? 3 : 0 | ||
| + | } | ||
| + | |||
| + | resource "aws_instance" "your_new_conditional_instance { | ||
| + | count = var.your_env == "PRE" ? 1 : 0 | ||
| + | ami = "ami-082b5a644766e0e6f" | ||
| + | instance_type = "t2.micro" | ||
| + | } | ||
| + | |||
| + | |||
| + | variable "elb_names" { | ||
| + | type = list | ||
| + | default = ["dev-loadbalancer", "stage-loadbalanacer","prod-loadbalancer"] | ||
| + | } | ||
| + | |||
| + | resource "aws_iam_user" "lb" { | ||
| + | name = var.elb_names[count.index] | ||
| + | count = 2 | ||
| + | path = "/system/" | ||
| + | } | ||
| + | |||
| + | |||
| + | resource "aws_ecs_service" "your_service" { | ||
| + | count = [[var.]]your_env_name == "PROD" ? 1 : 0 | ||
| + | .../... | ||
| + | [[task_definition]] = "${aws_ecs_task_definition.dashboards_task[0].family}:${aws_ecs_task_definition.dashboards_task[0].revision}" | ||
| + | .../... | ||
| + | } | ||
| + | |||
| + | |||
| + | == Error == | ||
| + | * <code>[[Error: Unexpected resource instance key]]</code> | ||
| + | * <code>[[Error: Missing resource instance key]]</code> | ||
| + | * [[Error: Invalid index]] | ||
| + | |||
| + | == Related == | ||
| + | * <code>[[for_each]]</code> | ||
| + | * <code># [[aws_instance]].your-instance-name has moved to aws_instance.your-instance-name[0]</code> | ||
| + | * [[Terraform conditional expressions]] | ||
| + | * <code>[[count.index]]</code> | ||
== See also == | == See also == | ||
| − | * {{Terraform}} | + | * {{count}} |
| + | * {{terraform functions}} | ||
| + | * {{Terraform meta-arguments}} | ||
[[Category:Terraform]] | [[Category:Terraform]] | ||
Latest revision as of 10:13, 26 June 2023
Examples[edit]
count = length(var.subnet_ids)count = var.vpc_cidr_block != null ? 1 : 0count = local.create_node_sg ? 1 : 0count = var.istest == true ? 3 : 0
count = 0
Terraform does not allow to use count inside module block.[2]
resource "aws_instance" "dev" { ami = "ami-082b5a644766e0e6f" instance_type = "t2.micro" count = 2 }
resource "aws_instance" "your_new_instance_in_test" {
ami = "ami-082b5a644766e0e6f"
instance_type = "t2.micro"
count = var.istest == true ? 3 : 0
}
resource "aws_instance" "your_new_conditional_instance {
count = var.your_env == "PRE" ? 1 : 0
ami = "ami-082b5a644766e0e6f"
instance_type = "t2.micro"
}
variable "elb_names" {
type = list
default = ["dev-loadbalancer", "stage-loadbalanacer","prod-loadbalancer"]
}
resource "aws_iam_user" "lb" {
name = var.elb_names[count.index]
count = 2
path = "/system/"
}
resource "aws_ecs_service" "your_service" {
count = var.your_env_name == "PROD" ? 1 : 0
.../...
task_definition = "${aws_ecs_task_definition.dashboards_task[0].family}:${aws_ecs_task_definition.dashboards_task[0].revision}"
.../...
}
Error[edit]
Related[edit]
for_each# aws_instance.your-instance-name has moved to aws_instance.your-instance-name[0]- Terraform conditional expressions
count.index
See also[edit]
- Terraform meta argument: count
- Terraform functions, Terraform collection functions:
tolist,toset,length,sum,file,join,depends_on,zipmap,replace,lookup,read files,concat,merge, templatefile, for_each, format, element, slice, try, filebase64, upper, filemd5, coalesce, formatlist, flatten - Terraform: Meta-Arguments:
count,depends_on,lifecycle: [ prevent_destroy | ignore_changes ]
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