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The router filter implements Thrift forwarding. It will be used in almost all Thrift proxying scenarios. The filter’s main job is to follow the instructions specified in the configured route table.
This filter should be configured with the name envoy.filters.thrift.router.
Statistics
The filter outputs generic routing error statistics in the thrift.<stat_prefix>. namespace.
Name | Type | Description |
|---|---|---|
route_missing | Counter | Total requests with no route found. |
unknown_cluster | Counter | Total requests with a route that has an unknown cluster. |
upstream_rq_maintenance_mode | Counter | Total requests with a destination cluster in maintenance mode. |
no_healthy_upstream | Counter | Total requests with no healthy upstream endpoints available. |
shadow_request_submit_failure | Counter | Total shadow requests that failed to be submitted. |
The filter is also responsible for cluster-level statistics derived from routed upstream clusters. Since these stats utilize the underlying cluster scope, we prefix with the thrift namespace.
Name | Type | Description |
|---|---|---|
thrift.upstream_rq_call | Counter | Total requests with the “Call” message type. |
thrift.upstream_rq_oneway | Counter | Total requests with the “Oneway” message type. |
thrift.upstream_rq_invalid_type | Counter | Total requests with an unsupported message type. |
thrift.upstream_resp_reply | Counter | Total responses with the “Reply” message type. Sums both Successses and Errors. |
thrift.upstream_resp_success | Counter | Total Replies that are considered “Successes”. |
thrift.upstream_resp_error | Counter | Total Replies that are considered “Errors”. |
thrift.upstream_resp_exception | Counter | Total responses with the “Exception” message type. |
thrift.upstream_resp_invalid_type | Counter | Total responses with an unsupported message type. |
thrift.upstream_rq_time | Histogram | total rq time from rq complete to resp complete; includes oneway messages. |
thrift.upstream_rq_size | Histogram | Request message size in bytes per upstream |
thrift.upstream_resp_size | Histogram | Response message size in bytes per upstream |
Note
The request and response size histograms include what’s sent and received during protocol upgrade. However, invalid responses are not included in the response size histogram.
