Stop/Start EC2 same instance with terraform?

[manfred.s...@gmail.com]

Is it possible to stop and restart the same EC2 instance without destroying the machine?

It would help in reducing costs and deployment times.

It seems currently always a new instance is started.

[David Adams]

Not with Terraform, but it's pretty easy to stop and start an instance with the CLI tools if you have them installed:

    $ aws ec2 stop-instances --region us-east-2 --instance-ids i-0123456789abcdef

    $ aws ec2 start-instances --region us-east-2 --instance-ids i-0123456789abcdef

If you need to fetch the instance ID quickly, you can define a TF output and get at it that way:

    $ terraform output id

    i-0123456789abcdef

Or if its buried in a module somewhere you can get it from the state:

    $ terraform state show module.service.aws_instance.host |awk '$1=="id"{print $3}'

    i-0123456789abcdef

Combine things and do:

    $ aws ec2 stop-instances --region us-east-2 --instance-ids $( terraform output id )

Enjoy.

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