https://github.com/runyontr/remote-state-datasource
https://github.com/runyontr/remote-state-datasource
Last synced: 2 months ago
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- Host: GitHub
- URL: https://github.com/runyontr/remote-state-datasource
- Owner: runyontr
- Created: 2021-08-16T11:49:01.000Z (almost 4 years ago)
- Default Branch: main
- Last Pushed: 2021-08-16T11:49:23.000Z (almost 4 years ago)
- Last Synced: 2025-01-30T11:29:28.466Z (4 months ago)
- Language: HCL
- Size: 6.27 MB
- Stars: 0
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Terraform state
## Source
In order for another terraform run to read data from a statefile, it needs to be available as an `output`. In the `source folder, we create a statefile that has a single number as an output:
```bash
❯ cd source
❯ tf apply
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:
# random_integer.priority will be created
+ resource "random_integer" "priority" {
+ id = (known after apply)
+ max = 50000
+ min = 1
+ result = (known after apply)
}
Plan: 1 to add, 0 to change, 0 to destroy.
Changes to Outputs:
+ random = (known after apply)
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
random_integer.priority: Creating...
random_integer.priority: Creation complete after 0s [id=24906]
Apply complete! Resources: 1 added, 0 changed, 0 destroyed.
Outputs:
random = 24906
❯ tf output
random = 24906
```
Created a random number of 24906 that we will read in the following section
## Reading
Reading from a statefile requires the use of a [Remote State Datasource](https://www.terraform.io/docs/language/state/remote-state-data.html). The example here reads from a local file, but a remote backend (e.g. s3) is also allowed.
This terraform reads from the other state file and prints off the same random number:
```bash
❯ cd read
❯ tf apply
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:
# null_resource.example1 will be created
+ resource "null_resource" "example1" {
+ id = (known after apply)
}
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
null_resource.example1: Creating...
null_resource.example1: Provisioning with 'local-exec'...
null_resource.example1 (local-exec): Executing: ["/bin/sh" "-c" "echo Random Number: $OUTPUT"]
null_resource.example1 (local-exec): Random Number: 24906
null_resource.example1: Creation complete after 0s [id=2995480828739082113]
Apply complete! Resources: 1 added, 0 changed, 0 destroyed.
```