#atmos (2022-02)

https://avp.fandom.com/wiki/Atmosphere_Processing_Plant

lol

Not yet

We were using a softlink for the atmos yaml file until the recent addition of the ATMOS_BASE_PATH env var which we now set to $(pwd) of the repo root

export ATMOS_BASE_PATH=$(pwd)

i havent noticed any issues since.

are you using the latest 1.3.26 of atmos?

That’s kind of what I ended up doing. I’ll do more tests to see if both are necessary, but setting ATMOS_BASE_PATH is definitely required now.

the ENV var is required

otherwise there is no way to set the correct base path since it can be executed from ant=y folder (root of the repo, or any component folder). And the path needs to be absolute

the latest version of geodesic sets ATMOS_BASE_PATH automatically

or you can do export ATMOS_BASE_PATH=$(pwd) in your Dockefile

Thanks Andriy! I haven’t had a look at geodesic for a while because it wasn’t trivial to port to M1 and had some compatibility issues. Have just seen Erik’s comment on that issue so will give it another go.

geodesic should work now on M1

or just add export ATMOS_BASE_PATH=$(pwd) to your Dockefile

while we are still working on good atmos docs :slightly_smiling_face: , the example shows a complete solution using tenant https://github.com/cloudposse/atmos/tree/master/examples/complete

it also shows all new features like stack and components folders, component multiple inheritance , etc.

this config shows all the settings regarding tenant https://github.com/cloudposse/atmos/blob/master/examples/complete/rootfs/usr/local/etc/atmos/atmos.yaml

the stacks show folder structure with multiple stages (accounts) and multiple tenants https://github.com/cloudposse/atmos/tree/master/examples/complete/stacks

then use commands like

atmos terraform plan test/test-component-override-3 -s tenant1-ue2-dev

@Andriy Knysh (Cloud Posse) – not sure a confluence link is helpful here?

deleted, I thought it was public

here is a list of atmos commands that work with the example

atmos version
atmos describe config
atmos describe component test/test-component-override -s tenant1-ue2-dev
atmos describe component infra/infra-server -s tenant1-ue2-dev
atmos terraform plan test/test-component-override -s tenant1-ue2-dev
atmos terraform deploy top-level-component1 -s tenant1-ue2-dev
atmos terraform deploy top-level-component1 -s tenant1-ue2-dev --deploy-run-init=true
atmos terraform destroy top-level-component1 -s tenant1-ue2-dev
atmos terraform validate test/test-component-override -s tenant1-ue2-dev
atmos terraform output test/test-component-override -s tenant1-ue2-dev
atmos terraform graph test/test-component-override -s tenant1-ue2-dev
atmos terraform show test/test-component-override -s tenant1-ue2-dev
atmos terraform workspace test/test-component-override --stack=tenant1-ue2-dev
atmos terraform varfile test/test-component-override -s tenant1-ue2-dev
atmos terraform varfile test/test-component-override -s tenant1-ue2-dev -f ./varfile.json
atmos terraform generate backend test/test-component-override -s tenant1-ue2-dev
atmos terraform clean test/test-component-override -s=tenant1-ue2-dev
atmos terraform workspace test/test-component-override --stack=tenant1-ue2-dev
atmos terraform shell test/test-component-override -s=tenant1-ue2-dev
atmos helmfile diff infra/infra-server -s tenant1-ue2-dev

It’s on our short term roadmap

We might take a slightly different approach though. I want the functionality built into atmos

Maybe we can do cookie cutter for the exposure

Cc @Andriy Knysh (Cloud Posse)

Since atmos is in go, cookie cutter in python, thinking to use one of the open source go projects

Go has a cookiecutter equiv? I’ve always just used cookiecutter to scaffold out example or template things like tf modules or starter projects for other languages like Go

I suppose gomplate with some clever flags/pipes could do much of the same

There is an abandoned project called boilr we may use for inspiration

No code ever dies

well, except the bad code hopefully I guess….

So you were thinking maybe just an atmos init command instead?

it is an opinionated tool after all so that would make sense

atmos generate <a lot of things>

we don’t put any config for a component in globals.yaml anymore (since it triggers all Spacelift stacks). All default config for a component goes into catalog/<component>.yaml

also, the latest atmos does not require setting workspace_key_prefix see https://github.com/cloudposse/atmos/pull/77

you can override it if needed, but it’s set automatically now

I should be able to do this after the state is merged into s3, right?

atmos terraform plan tfstate-backend -s root

For some reason, plan is thinking it needs to recreate the same s3 bucket/dynamo db tables I’ve already done. Maybe I can’t do

so in cold-start, you first create it using local state

then add the backend config for s3 to the component

run the command, TF should ask you to move the state

and it will move it automatically

@Andriy Knysh (Cloud Posse) – is there a way to tell what backend will be used when you use atmos terraform plan? After apply, I’m seeing the state in components/terraform/root-route53/terraform.tfstate.d/ue1-root/terraform.tfstate but I don’t know how to show that I’m not setup correctly

(my assumption is that file should be blank like it is in tfstate-backend )

you have to add the backend file to each component

in backend.tf.json

{
  "terraform": {
    "backend": {
      "s3": {
        "acl": "bucket-owner-full-control",
        "bucket": "xxx-uw2-root-tfstate",
        "dynamodb_table": "xxx-uw2-root-tfstate-lock",
        "encrypt": true,
        "key": "terraform.tfstate",
        "region": "us-west-2",
        "role_arn": "arn:aws:iam::xxxx:role/xxx-gbl-root-terraform",
        "workspace_key_prefix": "xxxxx"
      }
    }
  }
}

or even better:

https://github.com/cloudposse/atmos/blob/master/examples/complete/rootfs/usr/local/etc/atmos/atmos.yaml#L30

set it to true, and atmos will generate the backend automatically (from the component/stack config)

Hi Marton! welcome.

check out these docs

https://docs.cloudposse.com/tutorials/atmos-getting-started/

also look at this working example https://github.com/cloudposse/atmos/tree/master/examples/complete - it shows how to organize/separate components (terraform code/logic) and stacks (configuration)

you can just clone the repo and run these commands from the root of the repo

go run github.com/cloudposse/atmos version
go run github.com/cloudposse/atmos describe config
go run github.com/cloudposse/atmos terraform plan test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos terraform apply test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos terraform deploy test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos terraform validate test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos terraform output test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos terraform graph test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos terraform show test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos terraform workspace test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos describe component test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos describe component test/test-component-override-3 -s tenant1-ue2-dev
go run github.com/cloudposse/atmos describe component infra/infra-server -s tenant1-ue2-dev
go run github.com/cloudposse/atmos terraform generate backend test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos terraform clean test/test-component-override -s tenant1-ue2-dev
go run github.com/cloudposse/atmos terraform shell test/test-component-override -s tenant1-ue2-dev

thank you, I’ve been down the rabbit hole but now I can start looking at these.

Thank you again!

i think you want dns-primary for xyz.com and dns-delegated for any subdomain

Everyone loves the term “stack” it seems. People can’t get enough of it.

https://github.com/mineiros-io/terramate/blob/main/docs/hcl-generation.md

seems like they’ve taken a terragrunt approach

adopted HCL

interesting

Yeah definitely terragruntesque. I’m not actually sure how they differ honestly.

I may write up a post on the differences between the various Terra frameworks. I feel like folks would be interested in that.

That would be medium worthy!

I’d buy that for a dollar

@Andriy Knysh (Cloud Posse) Friendly suggestion to check out using git rebase --interactive to cut down on the commit log. It can be a great way to clean up a long running set of changes like this with a succinct message.

something went wrong with the GH action for the release. We use “Squash and Merge” so usually we don’t see all those commits

Ah yeah that makes sense as Squash from GH UI should’ve solved this too.