EC2 instances do not always have a Name tag, e.g. EKS worker nodes. When the tag is missing, fluentd logs are spammed by the plugin with [warn]: [filter_ec2_metadata] ec2-metadata: unknown placeholder${tagset_name}found in a tag. This PR exposes the ${hostname} placeholder that we can use instead of the Name tag.
EC2 instances do not always have a
Nametag, e.g. EKS worker nodes. When the tag is missing, fluentd logs are spammed by the plugin with[warn]: [filter_ec2_metadata] ec2-metadata: unknown placeholder${tagset_name}found in a tag. This PR exposes the${hostname}placeholder that we can use instead of theNametag.