Awesome
Ministry of Justice Instance Scheduler
A Go lambda function for stopping and starting instance, rds resources and autoscaling groups. The function is used by the Ministry of Justice Modernisation Platform and can be re-used in any environment with minimal changes.
Requirements
- AWS Vault with a profile configured to access the core-shared-services account
- Docker installed
- Golang
- SAM CLI - Install the SAM CLI
To install the SAM CLI on macOS:
brew tap aws/tap
brew install aws-sam-cli
Local development
Install dependencies & build the target
cd modernisation-platform-instance-scheduler
make
:warning: Code changes require a rebuild before you're able to run them. Use
local-re-run.shas a utility script when re-running local code changes.
Validate SAM template
aws-vault exec core-shared-services-production -- sam validate
Invoke Function
aws-vault exec core-shared-services-production -- sam local invoke --event event.json
Test Function in the Cloud
aws-vault exec core-shared-services-production -- sam sync --stack-name instance-scheduler --watch
Deploy on sprinkler-development using the local samconfig.toml and preventing prompts and failure when the stack is unchanged. The following command requires the instance-scheduler-ecr-repo ECR repository to be present in order to succeed.
ACCOUNT_ID=$(aws-vault exec sprinkler-development -- aws sts get-caller-identity --query Account --output text)
aws-vault exec sprinkler-development -- sam deploy --no-confirm-changeset --no-fail-on-empty-changeset --region eu-west-2 --image-repository $ACCOUNT_ID.dkr.ecr.eu-west-2.amazonaws.com/instance-scheduler-ecr-repo
Module initialisation. The following commands were used in order to generate the required go.mod and go.sum files prior to the first run of the tests.
cd instance-scheduler
go mod init github.com/ministryofjustice/modernisation-platform-instance-scheduler
go mod tidy
go mod download
Run Tests
cd instance-scheduler
aws-vault exec core-shared-services-production -- go test -v .
Configuration
- Environment variable INSTANCE_SCHEDULING_SKIP_ACCOUNTS: A comma-separated list of account names to be skipped from instance scheduling. For example:
export INSTANCE_SCHEDULING_SKIP_ACCOUNTS="xhibit-portal-development,another-development,". As can be observed in this example, every account name must be suffixed with a leading comma, hence the last comma in the list.