AWS CLI Query for pulling image from ecs describe-task-definition?

Question

So I'm trying to pull just the image from a task-definition. I'm running:

aws ecs describe-task-definition --task-definition nameoftaskdefinition --output text

And I'm trying add in the --query option so that result will look like

VAR = $(aws ecs describe-task-definition --task-definition nameoftaskdefinition --output text)

where echo $VAR would return image

Answer 1

Based on the output from the docs, you'll want something like this (untested)

aws ecs describe-task-definition \
    --task-definition nameoftaskdefinition \
    --query 'taskDefinition.containerDefinitions[].image' \
    --output text

Note that depending on your task, you may have multiple containerDefinitions, so the output from that command ($VAR in your example) could be a space separated string