Overview
When deploying projects to AWS ECS using CircleCI, you might encounter a timeout issue where the aws ecs update-service command hangs indefinitely, especially in the Production environment. This problem often arises due to the AWS CLI's default behavior of using a pager for output, which can cause the command to wait for user input, leading to a timeout.
Prerequisites
Ensure you have access to modify your CircleCI configuration.
Familiarity with AWS CLI and CircleCI pipeline setup.
Solution
The issue is caused by the AWS CLI's use of a pager, which waits for user input to proceed. This can be resolved by disabling the pager or setting it to a non-interactive mode. Follow these steps to fix the issue:
Disable AWS CLI Pager:
Set the
AWS_PAGERenvironment variable to an empty string before running theaws ecs update-servicecommand. This prevents the AWS CLI from using a pager.bash export AWS_PAGER=""
Alternative Solution: Set PAGER to Non-Interactive:
Alternatively, set the
PAGERenvironment variable to/bin/catglobally. This ensures that any CLI command uses a non-interactive pager.bash export PAGER="/bin/cat"
Modify CircleCI Configuration:
Update your CircleCI configuration file to include the above environment variable settings in the relevant job steps.
Increase No Output Timeout (Optional):
If the command still takes a long time, consider increasing the
no_output_timeoutin your CircleCI configuration to a larger value, such as 20 minutes.
By implementing these changes, you should be able to resolve the timeout issue and ensure smooth deployments to AWS ECS using CircleCI.