v2.105.0

This proxy release comprises mostly internal changes that set up for
upcoming discovery changes.

A `proxy_build_info` metric has been added to expose proxy build
metadata via the admin interface, i.e., for Prometheus.

v2.104.1

This release only changes how release artifacts are named. There are no
functional changes.

v2.104.0

This release primarily includes a fix for a regression in the tracing
system introduced in v2.101.0.

We have also made some internal changes to reduce latency in benchmarks.

v2.103.0

This release increases the default buffer size to match the proxy's
in-flight request limit. This reduces contention in overload--especially
high-concurrency--situations, substantially reducing tail latency.

v2.102.0

This release fixes a regression that could cause service profile lookups
to be retried indefinitely, despite the server returning an
`InvalidArgument` response (which indicates the proxy should not retry).

v2.101.0

This release primarily features an upgrade of the proxy's underlying
Tokio runtime and its related libraries. We've observed lower latencies
in initial benchmarks, but further testing and burn-in is warranted.

Also, the proxy now honors the `LINKERD_PROXY_LOG_FORMAT=json`
configuration to enable JSON-formatted logging.

v2.100.0

This change modifies the inbound gateway caching so that requests may be
routed to multiple leaves of a traffic split.

v2.99.0

The proxy can now operate as gateway, routing requests from its inbound
proxy to the outbound proxy, without passing the requests to a local
application. This supports Linkerd's multicluster feature by adding a
`Forwarded` header to propagate the original client identity and assist
in loop detection.

v2.98.0

In some ingress setups, the proxy could be tricked into looping requests
through the outbound proxy. We now detect these loops and fail these
requests with a 502, saving your precious CPU.

v2.97.0

This release adds special handling for I/O errors in HTTP responses so
that an `errno` label is included to describe the underlying errors
in the proxy's metrics.