Dynamically update a key value inside ecs taskdef.json using shell script

Question

Below is my taskdef.json and want to update few values dynamically using shell script, I'm trying to use JQ but doesn't seem to work as expected.

{
    "containerDefinitions": [{
      "logConfiguration": [{
        "logDriver": "fluentd",
        "options": {
          "tag": "fluentd demo"
        },
        "secretOptions": [{
          "name": "fluentd-address",
          "valueFrom": "arn:aws:ssm:region:aws_account_id:parameter:parameter_name"
        },
        {
            "name": "fluentd-name",
          "valueFrom": "arn:aws:ssm:region:aws_account_id:parameter:parameter_name"
        }
    ]
      }]
    }]
  }

I want the region and aws_account_id to be updated dynamically instead of hardcoding the value directly inside the taskdef.json.Is there a way to update these value?

Yes, there's a way. Please follow the [mcve] guidelines. – peak Mar 03 '21 at 03:37 — peak, Mar 03 '21 at 03:37

score 0 · Answer 1 · answered Mar 03 '21 at 04:39

Not sure if the use of jq is required or not, but you can simplly use sed to do the replacement:

region="us-east-1"
account_id="12345"

sed "s/region/${region}/g; s/aws_account_id/${account_id}/g" /path/to/taskdef.json

if you want to permanently change the values in the input file, add -i:

sed -i "s/region/${region}/g; s/aws_account_id/${account_id}/g" /path/to/taskdef.json

Dynamically update a key value inside ecs taskdef.json using shell script

1 Answers1