How do you create an archive file in Terraform? - terraform

Question

I have this code in terraform:
data "archive_file" "lambdazip" {
type = "zip"
output_path = "lambda_launcher.zip"
source_dir = "lambda/etc"
source_dir = "lambda/node_modules"
source {
content = "${data.template_file.config_json.rendered}"
filename = "config.json"
}
}
I get the following errors when I do terraform plan:
* data.archive_file.lambdazip: "source": conflicts with source_dir
("lambda/node_modules")
* data.archive_file.lambdazip: "source_content_filename": conflicts
with source_dir ("lambda/node_modules")
* data.archive_file.lambdazip: "source_dir": conflicts with
source_content_filename ("/home/user1/experiments/grascenote-
poc/init.tpl")
I am using terraform version v0.9.11

Answer 1

#Ram is correct. You cannot use both source_dir and source arguments in the same archive_file data source.
config_json.tpl
{"test": "${override}"}
Terraform
Terraform 0.12 and higher
Use templatefile()
main.tf
# create the template file config_json separately from the archive_file block
resource "local_file" "config" {
content = templatefile("${path.module}/config_json.tpl", {
override = "my value"
})
filename = "${path.module}/lambda/etc/config.json"
}
Terraform 0.11 and below
Use template provider.
main.tf
data "template_file" "config_json" {
template = "${file("${path.module}/config_json.tpl")}"
vars = {
override = "my value"
}
}
# create the template file config_json separately from the archive_file block
resource "local_file" "config" {
content = "${data.template_file.config_json.rendered}"
filename = "${path.module}/lambda/etc/config.json"
}
Next steps
Add to main.tf
# now you can grab the entire lambda source directory or specific subdirectories
data "archive_file" "lambdazip" {
type = "zip"
output_path = "lambda_launcher.zip"
source_dir = "${path.module}/lambda/"
depends_on = [
local_file.config,
]
}
Terraform run
$ terraform init
$ terraform apply
data.template_file.config_json: Refreshing state...
data.archive_file.lambdazip: Refreshing state...
An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
+ create
Terraform will perform the following actions:
+ local_file.config
id: <computed>
content: "{\"test\": \"my value\"}\n"
filename: "/Users/user/lambda/config.json"
Plan: 1 to add, 0 to change, 0 to destroy.
Do you want to perform these actions?
Terraform will perform the actions described above.
Only 'yes' will be accepted to approve.
Enter a value: yes
local_file.config: Creating...
content: "" => "{\"test\": \"my value\"}\n"
filename: "" => "/Users/user/lambda/config.json"
local_file.config: Creation complete after 0s (ID: 05894e86414856969d915db57e21008563dfcc38)
Apply complete! Resources: 1 added, 0 changed, 0 destroyed.
List the contents of the new zip file
$ unzip -l lambda_launcher.zip
Archive: lambda_launcher.zip
Length Date Time Name
--------- ---------- ----- ----
21 01-01-2049 00:00 etc/config.json
22 01-01-2049 00:00 node_modules/index.js
--------- -------
43 2 files

Answer 2

In case of node.js lambda function,
You need to use "resource.local_file" with "depends_on".
And separate "rendering file" with "directory".
First, Put static directory(etc, node_modules) into "lambda" folder without rendering files.
Second, Put rendering files into any other path.
data "template_file" "config_json" {
template = "${file("${path.module}/config_json.tpl")}"
vars = {
foo = "bar"
}
}
resource "local_file" "config_json" {
content = "${data.template_file.config_json.rendered}"
filename = "${path.module}/lambda/config.json"
}
data "archive_file" "lambda_zip" {
type = "zip"
output_path = "${path.module}/lambda_function.zip"
source_dir = "${path.module}/lambda"
# It is important to this process.
depends_on = [
"local_file.config_json"
]
}
resource "aws_lambda_function" "lambda" {
filename = "${path.module}/lambda_function.zip"
function_name = "lambda_function"
role = "${aws_iam_role.lambda.arn}"
handler = "index.handler"
runtime = "nodejs10.x"
}
resource "aws_iam_role" "lambda" {
...