Sticky-session for path based routing with envoy as sidecar proxy

[vichooz]

My apologies if this comes as a beginner's question

I'd like to understand if the following scenario is supported by envoy-proxy

• the first user’s request comes in without session information
• the request bypass the session server choice since it has no session information
• the request pass through the routing algorithm, where a server is chosen and affected to the client
• the server answers back, setting its own session information
• depending on its configuration, envoy router/LB can either use this session information or setup its own before sending the response back to the client
• the client sends a second request, now with session information he learnt during the first request
• the router/LB choose the server based on the client side information
• the request DOES NOT PASS THROUGH the load-balancing algorithm
• the server answers the request

If it is, are there any examples that I can take a look at for understanding the configurations better? Thanks

[mattklein123]

TL/DR we don't support this today, but this is also discussed in #7218. There hasn't been a good proposal yet on how we would encode upstream information into the session cookie.

[stale]

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in the next 7 days unless it is tagged "help wanted" or other activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in the next 7 days unless it is tagged "help wanted" or other activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed because it has not had activity in the last 37 days. If this issue is still valid, please ping a maintainer and ask them to label it as "help wanted". Thank you for your contributions.