Uly.me

cloud engineer

Terraform in a Docker Container

Run Terraform in a Docker container.

docker run --rm -it --name terraform -v ~/.aws:/root/.aws -v $(pwd):/workspace -w /workspace hashicorp/terraform:latest

Create an alias.

alias terraform='docker run --rm -it --name terraform -v ~/.aws:/root/.aws -v $(pwd):/workspace -w /workspace hashicorp/terraform:latest'

Run the command

terraform --version
Terraform v1.0.2
on linux_amd64

GCloud in a Docker Container

You can run a gcloud commands in a Docker container.

docker run -ti --name gcloud-config google/cloud-sdk:latest

Create an alias.

alias gcloud='docker run --rm -ti --volumes-from gcloud-config google/cloud-sdk:latest gcloud'

Run the command.

gcloud --version
Google Cloud SDK 348.0.0
alpha 2021.07.09
app-engine-go 1.9.71
app-engine-java 1.9.90
app-engine-python 1.9.93
app-engine-python-extras 1.9.93
beta 2021.07.09
bigtable 
bq 2.0.70
cbt 0.10.0
cloud-datastore-emulator 2.1.0
cloud-firestore-emulator 1.13.0
cloud-spanner-emulator 1.2.0
core 2021.07.09
datalab 20190610
gsutil 4.65
kpt 0.39.3
local-extract 1.2.0
pubsub-emulator 0.4.1

Create one for gsutil.

alias gsutil='docker run --rm -ti --volumes-from gcloud-config google/cloud-sdk:latest gsutil'

CloudFormation Userdata

Here’s another way to add startup scripts to your instance during creation.

      UserData:
        Fn::Base64: !Sub |
          #cloud-config
          repo_upgrade: none
 
          runcmd:
            # Cloud init startup script
            - "bash /root/setup.sh"
 
          write_files:
            # Cloud init startup script
            - owner: root:root
              permissions: '0644'
              path: /root/setup.sh
              content: |
                #! /bin/bash -x
          write_files:
            # Cloud init startup script
            - owner: root:root
              permissions: '0644'
              path: /root/setup.sh
              content: |
                #! /bin/bash -x
                # run your bash commands here
                date > log.txt
                uptime >>  log.txt

The above script creates a file setup.sh and executes it during instance creation. The output is dumped to log.txt file.