AWS TNB supports launching Amazon EC2 instances with custom user data, through the UserData node in Network Service Descriptor (NSD). For more information about custom user data, see User data and shell scripts in the Amazon EC2 User Guide.
During network instantiation, AWS TNB provides the Amazon EC2 instance registration to the cluster through a user-data script. When custom user data is also provided, AWS TNB merges both scripts and passes them on as a multimime script to Amazon EC2. The custom user-data script is run prior to the Amazon EKS registration script.
To use custom variables in the user-data script, add an exclamation mark !
after the open curly brace {. For example, to use MyVariable in
the script, enter: {!MyVariable}
Note
-
AWS TNB supports user-data scripts up to 7 KB in size.
-
Because AWS TNB uses AWS CloudFormation to process and render the
multimimeuser-data script, ensure that the script adheres to all AWS CloudFormation rules.
Syntax
tosca.nodes.AWS.Compute.UserData:
properties:
implementation: String
content_type: StringProperties
-
implementation -
The relative path to the user data script definition. The format must be:
./scripts/script_name.shRequired: Yes
Type: String
-
content_type -
Content type of the user data script.
Required: Yes
Type: String
Possible values:
x-shellscript
Example
ExampleUserData:
type: tosca.nodes.AWS.Compute.UserData
properties:
content_type: "text/x-shellscript"
implementation: "./scripts/customUserData.sh"