IssueTracker

Problem you have encountered:

The Customer cannot obtain any Java profiling information from their agent which runs in their GKE containers. Getting the following error:

GRPC: src/core/lib/security/credentials/oauth2/oauth2_credentials.cc:154 Call to http server ended with error 426 [].
Failed to create profile, will retry: 14 (Error occurred when fetching oauth2 token.)

The current version of the profiling agent is triggering the grpc library to make any HTTP/1.0 requests.

What you expected to happen:

The feature to add http/1.1 in grpc-core

Steps to reproduce:

Run the following command manually from the container:

echo "done getting metadata"

TZ='America/Los_Angeles' date +%H:%M:%S

echo "Trying to get token with HTTP 1.1"

curl --http1.1 -Lsv "http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token?alt=text" -H "Metadata-Flavor: Google"

echo " "

echo "Trying to get token with HTTP 1.0"

curl --http1.0 -Lsv "http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token?alt=text" -H "Metadata-Flavor: Google"

echo " "

echo "Trying to get token with HTTP 2.0"

curl --http2 -Lsv "http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token?alt=text" -H "Metadata-Flavor: Google"

echo " "

Other information (workarounds you have tried, documentation consulted, etc):

https://github.com/grpc/grpc/issues/19173

https://github.com/istio/istio/issues/13085#issuecomment-557754573