问题
I am trying to create rules in my ALB so there are parts of the path that I do not forward on to the target. So for example, my underlying service may accept a call like
GET http://hostname/dogs
But in the ALB I might add a version to the path for routing purposes:
GET http://hostname/v1/dogs
or I could call
GET http://hostname/v2/dogs
Both versions would be running in different target groups. I was thinking I could then drop the version part off so that my application doesn't have to be concerned with versioning. However, it's not obvious how I might handle that and it doesn't appear to be possible.
回答1:
This is not something that is currently supported by Application Load Balancer.
CloudFront, however, has a setting called Origin Path that is prepended to the request URI before sending the request to the origin server -- in this case, the origin ALB -- so you'd set the origin path to /v1 if you wanted example.com/dogs to be sent to the ALB as example.com/v1/dogs. CloudFront is a CDN but it has a number of other purposes, such as request rewriting -- it's essentially a massive, globally-distributed reverse proxy with a cache, and supports dynamic as well as static content. More complex rewrites require Lambda@Edge in addition to CloudFront, but prepending a string to certain request path patterns is part of the base feature set.
来源：https://stackoverflow.com/questions/47667372/is-it-possible-to-forward-only-part-of-a-path-using-aws-elb