将命令作为变量传递给ECS任务定义

Question

有没有办法将Docker命令作为Terraform变量传递给Terraform中定义的ECS任务定义？

Answer 1

根据aws_ecs_task_definition文档，container_definitions属性是一个未解析的JSON对象，它是一个容器定义数组，可以直接传递给AWS API。该对象的属性之一是command。

对文档进行一些解释，您会得到一个示例任务定义，如：

resource "aws_ecs_task_definition" "service" {
family                = "service"
container_definitions = <<DEFINITIONS
[
{
"name": "first",
"image": "service-first",
"command": ["httpd", "-f", "-p", "8080"],
"cpu": 10,
"memory": 512,
"essential": true
}
]
DEFINITIONS
}

Answer 2

如果根模块没有传递任何内容，您可以尝试以下方法将command作为具有模板条件的变量。service.json

[
{
...
],
%{ if command != "" }
"command"  : [${command}],
%{ endif ~}
...
}
]

集装箱.tf

data "template_file" "container_def" {
count    = 1
template = file("${path.module}/service.json")
vars = {
command        = var.command != "" ? join(",", formatlist(""%s"", var.command)) : ""
}
}

主.tf

module "example" {
...
command                 = ["httpd", "-f", "-p", "8080"]
...
}

变量.tf

variable "command" {
default = ""
}