commit b27dfb2
Author: Takanori Ishibashi <[email protected]>
Date:   Wed May 15 05:58:42 2019 +0900

    updaes->updates (linkerd#250)

    Signed-off-by: Takanori Ishibashi <[email protected]>

commit 16441c2
Author: Eliza Weisman <[email protected]>
Date:   Tue May 14 14:40:03 2019 -0700

     Pass router::Config directly to router::Layer (linkerd#253)

    Currently, router `layer`s are constructed with a single argument, a
    type implementing `Recognize`. Then, the entire router stack is built
    with a `router::Config`. However, in linkerd#248, it became necessary to
    provide the config up front when constructing the `router::layer`, as
    the layer is used in a fallback layer. Rather than providing a separate
    type for a preconfigured layer, @olix0r suggested we simply change all
    router layers to accept the `Config` when they're constructed (see
    linkerd#248 (comment)).

    This branch changes `router::Layer` to accept the config up front. The
    `router::Stack` types `make` function now requires no arguments, and the
    implementation of `Service` for `Stack` can be called with any `T` (as
    the target is now ignored).

    Signed-off-by: Eliza Weisman <[email protected]>

commit b70c68d
Author: Eliza Weisman <[email protected]>
Date:   Wed May 15 13:14:04 2019 -0700

    Load balancers fall back to ORIG_DST when no endpoints exist (linkerd#248)

    Currently, when no endpoints exist in the load balancer for a
    destination, we fail the request. This is because we expect endpoints to
    be discovered by both destination service queries _and_ DNS lookups, so
    if there are no endpoints for a destination, it is assumed to not exist.

    In linkerd/linkerd2#2661, we intend to remove the DNS lookup from the
    proxy and instead fall back to routing requests for which no endpoints
    exist in the destination service to their SO_ORIGINAL_DST IP address.
    This means that the current approach of failing requests when the load
    balancer has no endpoints will no longer work.

    This branch introduces a generic `fallback` layer, which composes a
    primary and secondary service builder into a new layer. The primary
    service can fail requests with an error type that propages the original
    request, allowing the fallback middleware to call the fallback service
    with the same request. Other errors returned by the primary service are
    still propagated upstream.

    In contrast to the approach used in linkerd#240, this fallback middleware is
    generic and not tied directly to a load balancer or a router, and can
    be used for other purposes in the future. It relies on the router cache
    eviction added in linkerd#247 to drain the router when it is not being used,
    rather than proactively destroying the router when endpoints are
    available for the lb, and re-creating it when they exist again.

    A new trait, `HasEndpointStatus`, is added in order to allow the
    discovery lookup to communicate the "no endpoints" state to the
    balancer. In addition, we add a new `Update::NoEndpoints` variant to
    `proxy::resolve::Update`, so that when the control plane sends a no
    endpoints update, we switch from the balancer to the no endpoints state
    _immediately_, rather than waiting for all the endpoints to be
    individually removed. When the balancer has no endpoints, it fails all
    requests with a fallback error, so that the fallback middleware

    A subsequent PR (linkerd#248) will remove the DNS lookups from the discovery
    module.

    Closes linkerd#240.

    Signed-off-by: Eliza Weisman <[email protected]>

commit 6525b06
Author: Zahari Dichev <[email protected]>
Date:   Wed May 15 23:35:09 2019 +0300

    Allow disabling tap by setting an env var (linkerd#252)

    This PR fixes linkerd/linkerd2#2811. Now if
    `LINKERD2_PROXY_TAP_DISABLED` is set, the tap is not served at all. The
    approach taken is that  the `ProxyParts` is changed so the
    `control_listener` is now an `Option` that will be None if tap is
    disabled as this control_listener seems to be exclusively used to serve
    the tap. Feel free to suggest a better approach.

    Signed-off-by: Zahari Dichev <[email protected]>

commit 91f32db
Author: Zahari Dichev <[email protected]>
Date:   Thu May 16 00:45:23 2019 +0300

    Assert that outbound TLS works before identity is certified (linkerd#251)

    This commit introduces TLS capabilities to the support server as well as
    tests to ensure that outbound TLS works even when there is no verified
    certificate for the proxy yet.

    Fixes linkerd/linkerd2#2599

    Signed-off-by: Zahari Dichev <[email protected]>

commit 45aadc6
Author: Sean McArthur <[email protected]>
Date:   Wed May 15 14:25:39 2019 -0700

    Update h2 to v0.1.19

    Includes a couple HPACK fixes

    Signed-off-by: Sean McArthur <[email protected]>

commit 3e0e00c
Author: Oliver Gould <[email protected]>
Date:   Thu May 16 08:11:06 2019 -0700

    Update mio to 0.6.17 (linkerd#257)

    To pick up tokio-rs/mio#939