• Enhancement - aws-sdk-go-v2 migration
  • Migrate awserr/request to aws-go-sdk-v2 #4624
  • Migrate jsonutil to encoding/json for aws-sdk-go-v2 migration #4626
• Enhancement - Add support for custom providers to determine the initial amount of available memory on a container instance #4617
• Enhancement - IPv6-only support
  • Include container IPv6 addresses (if available) in container metadata file for bridge mode tasks #4616
  • Create a route for TMDS access on host mode on IPv6-only instances #4633
  • Expand the network blackhole port to allow drop packets for IPv6 #4629
  • Add a DualStackEnabled ECS client option and a SubnetGatewayIPV6Address field under NetworkInterfaceProperties #4632
  • Use IPv6 addresses when generating extraHosts for IPv6-only awsvpc mode tasks #4627
  • SSM Client resolves to dualstack endpoint on IPV6-only instances #4623
  • Support task ENI setup for IPv6 only tasks #4641
• Enhancement - Use ECS_AGENT_PID_NAMESPACE_HOST to run agent container in pid host mode #4595
• Bugfix - reduce unnecessary "redundant state change" logs #4639