terraform-ssm-runcommand

This terraform module can be used to execute commands on remote EC2 instances via AWS SSM.

Description

The module uses a null_resource resource which executes either a bash script or a powershell script depending on the detected OS. The scripts are wrappers around AWS CLI send-command, with some extra functionality.

Usage

module "ssm_runcommand_windows" {
  source                      = "github.com/paololazzari/terraform-ssm-runcommand"
  instance_id                 = "i-..."
  target_os                   = "windows"
  command                     = "Get-Process -name 'amazon*'"
  wait_for_command_completion = true
}

module "ssm_runcommand_unix" {
  source                      = "github.com/paololazzari/terraform-ssm-runcommand"
  instance_id                 = "i-..."
  target_os                   = "unix"
  command                     = "ps -ax | grep 'amazon*'"
  wait_for_command_completion = true
}

For other examples, check the examples.

Requirements

Name	Version
terraform	>= 0.13.1
aws	>= 4.20.0
null	>= 3.2.1

Providers

Name	Version
aws	>= 4.20.0
null	>= 3.2.1

Resources

Name	Type
null.ssm_runcommand_provisioner	resource

Modules

No modules.

Inputs

The following inputs are required:

Parameter Name	Description	Type	Required
instance_id	The id of the EC2 instance on which to run the SSM command	string	Yes
target_os	The operating system of the EC2 instance on which to run the SSM command	string	Yes
command	The command to execute on the EC2 instance	string	Yes

The following inputs are optional and can be used to control the behavior of the module:

Parameter Name	Description	Type	Default	Required
wait_for_command_completion	Whether or not the terraform execution should wait for the SSM command to be completed	bool	false	No
ssm_timeout_seconds	How many seconds the SSM agent has to start before the instance is deemed unhealthy	int	60	No
show_command_output	Whether or not the output of the SSM command should be printed	bool	false	No
continue_on_error	Whether or not the terraform execution should continue if the SSM command failed	bool	false	No
log_file	If specified, any outputs will be redirected to it	string	""	No

The following inputs are optional and can be used to specify arguments for the send-command cli request:

Parameter Name	Description	Type	Default	Required
timeout_seconds	If this time is reached and the command hasn't already started running, it won't run	string	""	No
comment	User-specified information about the command, such as a brief description of what the command should do	string	""	No
output_s3_bucket_name	The name of the S3 bucket where command execution responses should be stored	string	""	No
output_s3_key_prefix	The directory structure within the S3 bucket where the responses should be stored	string	""	No
service_role_arn	The ARN of the Identity and Access Management (IAM) service role to use to publish Amazon Simple Notification Service (Amazon SNS) notifications for Run Command commands	string	""	No
notification_config	Configurations for sending notifications	string	""	No
cloud_watch_output_config	Enables Amazon Web Services Systems Manager to send Run Command output to Amazon CloudWatch Logs	string	""	No
alarm_configuration	The CloudWatch alarm you want to apply to your command	string	""	No
endpoint_url	Override command's default URL with the given URL	string	""	No
region	The region to use. Overrides config/env settings	string	""	No

For more information, see the official documentation page.

Outputs

No outputs.

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