#atlantis - April 2019 | Slack Archive

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27 messages

Discuss the Atlantis (runatlantis.io)
Archive: https://archive.sweetops.com/atlantis/

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rohitabout 7 years ago

what is the best way to setup atlantis in AWS ?

Erik Osterman (Cloud Posse)about 7 years ago

this is actually a surprisingly big question.

Erik Osterman (Cloud Posse)about 7 years ago

we've deployed atlantis now many times in many different configurations

Erik Osterman (Cloud Posse)about 7 years ago

our current best practice is to deploy it as an ECS fargate task with an ALB configured with OIDC

Erik Osterman (Cloud Posse)about 7 years ago

https://github.com/cloudposse/terraform-root-modules/tree/master/aws/ecs

aaratnabout 7 years ago

@Erik Osterman (Cloud Posse) - Any hints how we can do this with terragrunt + atlantis ?

Erik Osterman (Cloud Posse)about 7 years ago

to use terragrunt you just need to define your own workflow in the atlantis.yaml

Erik Osterman (Cloud Posse)about 7 years ago

don't depend on the built-in plan and apply steps of atlantis

Erik Osterman (Cloud Posse)about 7 years ago

we define a make workflow that you can borrow

Erik Osterman (Cloud Posse)about 7 years ago

then you just define the steps in your Makefile for the project

aaratnabout 7 years ago

Got it ! We used to use a lot of makefiles before terragrunt but I got what you are saying. Use makefiles + terragrunt on atlantis

Erik Osterman (Cloud Posse)about 7 years ago

https://github.com/cloudposse/testing.cloudposse.co/blob/master/atlantis.yaml

Erik Osterman (Cloud Posse)about 7 years ago


workflows:
  make:
    plan:
      steps:
        - run: "make reset deps"
        - run: "set -o pipefail; make plan | tfmask | scenery --no-color"
    apply:
      steps:
        - run: "set -o pipefail; make apply | tfmask"

Erik Osterman (Cloud Posse)about 7 years ago

so a project just defines a Makefile with a plan and apply target

Erik Osterman (Cloud Posse)about 7 years ago

https://github.com/cloudposse/terraform-root-modules/blob/master/aws/acm/Makefile

Erik Osterman (Cloud Posse)about 7 years ago

our Makefile looks like this

Erik Osterman (Cloud Posse)about 7 years ago

fwiw, we use https://github.com/cloudposse/tfenv

Erik Osterman (Cloud Posse)about 7 years ago(edited)

so we don't need a wrapper like terragrunt

aaratnabout 7 years ago

Interesting !

aaratnabout 7 years ago

Any clues to do a dry run before apply ?

Erik Osterman (Cloud Posse)about 7 years ago

you mean terraform plan?

aaratnabout 7 years ago

the terraform plan doesn't necessarily succeed

aaratnabout 7 years ago

Like for eg. you define a wrong instance type in terraform plan and it will succeed but it will fail when you actually apply it

rohitabout 7 years ago

@Erik Osterman (Cloud Posse) what would be the difference between https://github.com/cloudposse/terraform-root-modules/tree/master/aws/ecs and https://registry.terraform.io/modules/terraform-aws-modules/atlantis/aws/1.17.0 ?

Erik Osterman (Cloud Posse)about 7 years ago

@antonbabenko manages terraform-aws-modules/atlantis

Erik Osterman (Cloud Posse)about 7 years ago(edited)

it uses the #terraform-aws-modules which we (cloudposse) do not manage

antonbabenkoabout 7 years ago

Yeah, I am not very active in #terraform-aws-modules neither, but you can try to ask in public github. Maybe other can help you faster there.

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