如何为多个构建使用相同的源

问题描述

我想删除以下打包脚本中的重复代码。我想要的是运行相同的构建，我希望其结果是两个名称不同的 AMI。

这是一个工作示例的味道：

source "amazon-ebs" "head" {
    profile = "$(var.aws_profile}"
    access_key = "${var.aws_access_key}"
    secret_key = "${var.aws_secret_key}"
    instance_type = "${var.instance_type}"
    region = "${var.aws_region}"
    source_ami_filter {
        filters = {
            virtualization-type = "hvm"
            name = "${var.base_ami_name}"
            root-device-type = "ebs"
        }
        owners = [ "1234567890" ]
        most_recent = true
    }
    launch_block_device_mappings {
            device_name = "/dev/sda1"
            volume_size = "${var.volume_size}"
            volume_type = "gp2"
            delete_on_termination = true
    }
    ssh_username = "centos"
    ami_name = "head-{{timestamp}}"
}


source "amazon-ebs" "worker" {
    profile = "$(var.aws_profile}"
    access_key = "${var.aws_access_key}"
    secret_key = "${var.aws_secret_key}"
    instance_type = "${var.instance_type}"
    region = "${var.aws_region}"
    source_ami_filter {
        filters = {
            virtualization-type = "hvm"
            name = "${var.base_ami_name}"
            root-device-type = "ebs"
        }
        owners = [ "1234567890" ]
        most_recent = true
    }
    launch_block_device_mappings {
            device_name = "/dev/sda1"
            volume_size = "${var.volume_size}"
            volume_type = "gp2"
            delete_on_termination = true
    }
    ssh_username = "centos"
    ami_name = "worker-{{timestamp}}"
}



################
# Builder
################

build {
    #source "amazon-ebs.head" {
    #  name = "worker"
    #}

    sources = ["source.amazon-ebs.head","source.amazon-ebs.worker"]

显然这有点长，几乎完全重复。我想要的是更接近的东西：

source "amazon-ebs" "head" {
    profile = "$(var.aws_profile}"
    access_key = "${var.aws_access_key}"
    secret_key = "${var.aws_secret_key}"
    instance_type = "${var.instance_type}"
    region = "${var.aws_region}"
    source_ami_filter {
        filters = {
            virtualization-type = "hvm"
            name = "${var.base_ami_name}"
            root-device-type = "ebs"
        }
        owners = [ "125523088429" ]
        most_recent = true
    }
    launch_block_device_mappings {
            device_name = "/dev/sda1"
            volume_size = "${var.volume_size}"
            volume_type = "gp2"
            delete_on_termination = true
    }
    ssh_username = "centos"
    ami_name = "head-{{timestamp}}"
}


################
# Builder
################

build {
    source "amazon-ebs.head" {
      ami_name = "worker-{{timestamp}}"
    }

    sources = ["source.amazon-ebs.head",]

或任何类似的东西。但我似乎无法让它工作。首先，我无法从第一个源中完全删除 ami_name，因为这是一个必填字段。如果我尝试使用变量（例如向源添加名称字段，然后使用 {{.Name}} 而不是显式 ami_name），我将不会收到错误消息。

当然，这样的事情一定是可能的，对吧？还是我应该放弃？显然它应该像 the documentation implies 一样简单，但同一个例子实际上对我不起作用......

解决方法

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