template_file data source that covers multiple templates

[John Parfitt]

i have about 10 different, unique userdata files, for separate instances. However I want to pass a common variable to all of them without creating 10 "template_file" resources. Something like this, which doesn't work, because it just sets "template" to whatever the last one is:

data "template_file" "userdata" {

    template = "${file("${path.module}/userdata_olympus.conf")}"

    template = "${file("${path.module}/userdata_vpn.conf")}"

    template = "${file("${path.module}/userdata_nat.conf")}"

    vars {

        domain_suffix = "${var.domain_suffix}"

    }

}

data "template_file" "userdata_puppetdb" {

    template = "${file("${path.module}/userdata_puppetdb.conf")}"

    vars {

        domain_suffix = "${var.domain_suffix}"

        puppetmaster_ip = "${aws_instance.puppet_server.private_ip}"

    }

}

Where the first block uses the common "domain_suffix" variable, and then any other resource would be for instances that require unique variables.

[Tom Davidson]

would this do what your after, if not, can you explain more?:

template = "{join(",", file("${path.module}/userdata_olympus.conf"), file("${path.module}/userdata_vpn.conf"), file("${path.module}/userdata_nat.conf")}"

[John Parfitt]

I'm just looking for some sort of regex, like: 

data "template_file" "userdata" {

    template = "${file("${path.module}/userdata_*.conf")}"

    vars {

        domain_suffix = "${var.domain_suffix}"

    }

}

so that all userdata files that use the "domain_suffix" variable are included. i don't want to have to create a template_file resource for each userdata (the userdata files are all slightly different, but they use the same variable).

[John Parfitt]

bump

The best I can explain is that I have 10 instances, each instance has a different userdata file, but each userdata file shares a single, common variable that I want to pass to it.

userdata_sql.conf

userdata_nginx.conf

userdata_app.conf

For each of these I want to pass a variable using a single "template_file" resource that covers all of those userdata files.

I want to do this:

data "template_file" "userdata_files" {

  template = "${file("${path.module}/userdata_*.conf")}"

  

  vars {

    domain_suffix = "${var.domain_suffix}"

  }

}

Instead of this:

data "template_file" "userdata_sql" {

  template = "${file("${path.module}/userdata_sql.conf")}"

  

  vars {

    domain_suffix = "${var.domain_suffix}"

  }

}

data "template_file" "userdata_nginx" {

  template = "${file("${path.module}/userdata_nginx.conf")}"

  

  vars {

    domain_suffix = "${var.domain_suffix}"

  }

}

data "template_file" "userdata_app" {

  template = "${file("${path.module}/userdata_app.conf")}"

  

  vars {

    domain_suffix = "${var.domain_suffix}"

  }

}

Does that make sense?

[John Parfitt]

Tom - that syntax didn't work and I couldn't get it to NOT error. I tried using "format" instead of "join" and i was able to get terraform to run, but it ended up giving every instance the same userdata.

On Sunday, February 26, 2017 at 8:49:35 AM UTC-8, Tom Davidson wrote: