outbound: Disable informational headers by config#1284
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The proxy may set error messages in the outbound proxy's response headers; but sometimes this isn't desirable, especially on ingresses where the repsonses may be sent to external clients. This change introduces a new configuration, `LINKERD2_PROXY_OUTBOUND_DISABLE_INFORMATIONAL_HEADERS` that can be set to `false` to disable these headers from being included in responses from the outbound proxy. These headers are also disabled by default when ingress mode is enabled.
olix0r
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This release improves the proxy's error handling, introducing a new `l5d-proxy-connection` header to signal from an inbound proxy when its peers outbound connections should be torn down. Furthermore, error handling has been improved so that the `l5d-proxy-error` header is only sent to trusted peers--the inbound proxy only emits this header when its client is meshed; and the outbound proxy can be configured to disable these headers via configuration. --- * build(deps): bump hyper from 0.14.12 to 0.14.13 (linkerd/linkerd2-proxy#1273) * build(deps): bump tracing-subscriber from 0.2.22 to 0.2.23 (linkerd/linkerd2-proxy#1274) * tracing: use `Span::or_current` when spawning tasks (linkerd/linkerd2-proxy#1272) * dns: Log TTL with resolution (linkerd/linkerd2-proxy#1275) * error-respond: Support stack target configuration (linkerd/linkerd2-proxy#1276) * build(deps): bump tracing-subscriber from 0.2.23 to 0.2.24 (linkerd/linkerd2-proxy#1277) * build(deps): bump tracing from 0.1.27 to 0.1.28 (linkerd/linkerd2-proxy#1278) * build(deps): bump tokio from 1.11.0 to 1.12.0 (linkerd/linkerd2-proxy#1279) * build(deps): bump http from 0.2.4 to 0.2.5 (linkerd/linkerd2-proxy#1280) * Support a `l5d-proxy-connection: close` header (linkerd/linkerd2-proxy#1281) * Avoid emitting informational headers to untrusted clients (linkerd/linkerd2-proxy#1282) * outbound: Only honor the `l5d-proxy-connection` header when meshed (linkerd/linkerd2-proxy#1283) * outbound: Disable informational headers by config (linkerd/linkerd2-proxy#1284) * outbound: Strip peer-sent `l5d-proxy-error` headers (linkerd/linkerd2-proxy#1285)
alpeb
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to linkerd/linkerd2
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Sep 23, 2021
This release improves the proxy's error handling, introducing a new `l5d-proxy-connection` header to signal from an inbound proxy when its peers outbound connections should be torn down. Furthermore, error handling has been improved so that the `l5d-proxy-error` header is only sent to trusted peers--the inbound proxy only emits this header when its client is meshed; and the outbound proxy can be configured to disable these headers via configuration. --- * build(deps): bump hyper from 0.14.12 to 0.14.13 (linkerd/linkerd2-proxy#1273) * build(deps): bump tracing-subscriber from 0.2.22 to 0.2.23 (linkerd/linkerd2-proxy#1274) * tracing: use `Span::or_current` when spawning tasks (linkerd/linkerd2-proxy#1272) * dns: Log TTL with resolution (linkerd/linkerd2-proxy#1275) * error-respond: Support stack target configuration (linkerd/linkerd2-proxy#1276) * build(deps): bump tracing-subscriber from 0.2.23 to 0.2.24 (linkerd/linkerd2-proxy#1277) * build(deps): bump tracing from 0.1.27 to 0.1.28 (linkerd/linkerd2-proxy#1278) * build(deps): bump tokio from 1.11.0 to 1.12.0 (linkerd/linkerd2-proxy#1279) * build(deps): bump http from 0.2.4 to 0.2.5 (linkerd/linkerd2-proxy#1280) * Support a `l5d-proxy-connection: close` header (linkerd/linkerd2-proxy#1281) * Avoid emitting informational headers to untrusted clients (linkerd/linkerd2-proxy#1282) * outbound: Only honor the `l5d-proxy-connection` header when meshed (linkerd/linkerd2-proxy#1283) * outbound: Disable informational headers by config (linkerd/linkerd2-proxy#1284) * outbound: Strip peer-sent `l5d-proxy-error` headers (linkerd/linkerd2-proxy#1285)
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The proxy may set error messages in the outbound proxy's response
headers; but sometimes this isn't desirable, especially on ingresses
where the repsonses may be sent to external clients.
This change introduces a new configuration,
LINKERD2_PROXY_OUTBOUND_DISABLE_INFORMATIONAL_HEADERSthat can be setto
falseto disable these headers from being included in responsesfrom the outbound proxy. These headers are also disabled by default when
ingress mode is enabled.