088df00edc
Newer grafana sends an options request that graphite responds to with a 400 response. This response did not include allowed origin headers because it is a failure case. Update this header and the allowed methods header to always be included even on 400 or other error responses. This should ideally address the CORS errors we see with updated grafana. An alternative is to update grafana to proxy the requests for us, but this is less flexible as other tools may not have built in proxies. The suggestion comes from this stackoverflow question and answer: https://stackoverflow.com/questions/20414669/nginx-add-headers-when-returning-400-codes Change-Id: Icf1179d35e420384da72af839ca329548226ee63
Run Graphite