Parameterize LogGroup name & LogStream Prefix in ECS Task Definition

Question

When we create an ECS Task Definition, we have log configuration which allows us to create log groups, log streams etc. Instead of providing the name for log group and log stream prefix, I want to parameterize these and pass them during execution of the ECS Task Definition. Is this possible? I tried passing something like ${log-group-name} for awslogs-group attribute. But, it is throwing an error saying it has invalid characters. Please help. I am looking for something like below.

```
"logConfiguration": {
                "logDriver": "awslogs",
                "options": {
                    "awslogs-create-group": "true",
                    "awslogs-group": "${log-group-name}",
                    "awslogs-region": "us-east-1",
                    "awslogs-stream-prefix": "${log-stream-prefix}"
                },
            }
```

Donov · Answer

Hi,
How do Launch your ECS Task ?

Often in my CICD pipeline, I'm using a generic ECS Task Definition as template, and I use `sed` to replace all variables inside it to create a new one.

For instance:
```
export CI_AWS_ECS_TASK_DEFINITION_FILE="taskdef.json"
export log-group-name="/ecs/myproject/app"

cp ./files/$CI_AWS_ECS_TASK_DEFINITION_FILE ./artifacts/$CI_AWS_ECS_TASK_DEFINITION_FILE
cd artifacts
sed -i "s||$log-group-name|g" $CI_AWS_ECS_TASK_DEFINITION_FILE
aws ecs register-task-definition --cli-input-json file://artifacts/$CI_AWS_ECS_TASK_DEFINITION_FILE.json
```

Antonio_Lagrotteria · Answer

Check this out: https://github.com/aws/containers-roadmap/issues/74, does it fit your case?

Parameterize LogGroup name & LogStream Prefix in ECS Task Definition

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