Use application parameters injected as environment variables to improve deployment flexibility. Supports standard and encrypted parameters and group-specific configurations for securely storing sensitive information. - CloudOps Orchestration Service

You can use application parameters to store information such as application configurations and passwords. During deployment, these parameters are injected as environment variables into the application's startup and shutdown scripts. This process improves deployment flexibility and security.

Create and use application parameters

Go to the ECS console - Application Management page. On the My Applications tab, click the name of the target application to open the application details page.
Select the Parameters tab, and then click Create Parameter.
In the Create Parameter panel, configure the following parameters, and then click OK.
- Parameter Name: The name of the parameter, which is used as an environment variable in the script. For example, port.
- Type:
  - Custom Parameters: Stores non-sensitive configuration information.
  - Encryption Parameter: Stores sensitive information, such as passwords and API keys. The parameter value is encrypted to improve security.
- Set different values for each group:
  - Yes: Specify a different value for each group. For example, for the port parameter, set the value for Group 1 to 8080 and the value for Group 2 to 8081.
  - No: Set a single value for all application groups.
Use the parameter in the deployment package. In the application startup script, use ${port} to reference the parameter.
```
function start_application() {
  docker run -d -p ${port}:${port} --name my-application image:latest
}

start_application
```
When you publish the deployment package to different application groups, ${port} in the script is parsed into the value specified for the corresponding group. For example, when you publish to Group 1, the value of ${port} is 8080. When you publish to Group 2, the value is 8081.