Making it clear H2 websockets don't work by default

Risk Level: n/a
Testing: n/a
Docs Changes: yes
Release Notes: no
#8147

Signed-off-by: Alyssa Wilk <[email protected]>

Description: Upstream from envoyproxy/envoy-wasm the WebAssembly VM support along with the Null VM support and tests. This is the first PR dealing with WebAssembly filter support in envoy.  See https://github.com/envoyproxy/envoy-wasm/blob/master/WASM.md and https://github.com/envoyproxy/envoy-wasm/blob/master/docs/root/api-v2/config/wasm/wasm.rst for details.
Risk Level: Medium
Testing: Unit tests.
Docs Changes: N/A
Release Notes: N/A
Part of #4272 

Signed-off-by: John Plevyak <[email protected]>

Implement QuicStream|Session|Disptacher in Envoy. Weir up QUIC stream and connection with HCM callbacks.

Risk Level: low, not in use
Testing: Added unit tests for all new classes
Part of #2557
Signed-off-by: Dan Zhang <[email protected]>

Split out the generic plugin and FileDescriptorProto traversal bits from
protodoc. This is in aid of the work in #8082 ad #8083, where additional
protoc plugins will be responsible for v2 -> v3alpha API migrations and
translation code generation.

This is only the start really of the api_proto_plugin framework. I
anticipate additional bits of protodoc will move here later, including
field type analysis and oneof handling.

In some respects, this is a re-implementation of some of
https://github.com/lyft/protoc-gen-star in Python. The advantage is that
this is super lightweight, has few dependencies and can be easily
hacked. We also embed various bits of API business logic, e.g.
annotations, in the framework (for now).

Risk level: Low
Testing: diff -ru against previous protodoc.py RST output, identical modulo some
  trivial whitespace that doesn't appear in generated HTML. There are no
  real tests yet, I anticipate adding some golden proto style tests.

Signed-off-by: Harvey Tuch <[email protected]>

Signed-off-by: Tony Allen <[email protected]>

Signed-off-by: Dhi Aurrahman <[email protected]>

Description:
Follow-up to #7911 to make cached values be exposed as const-references, saving on a copy of a string during retrieval.

Risk Level: low
Testing: updated mocks to return references
Docs Changes: none
Release Notes: none

Signed-off-by: Kuat Yessenov <[email protected]>

Add a test ensuring curl was built with the expected features.

Description: Add a test ensuring curl was built with the expected features.
Risk Level: Low.
Testing: n/a.
Docs Changes: n/a.
Release Notes: n/a.

Signed-off-by: Taras Roshko <[email protected]>

* subset lb: allow ring hash/maglev LB to work with subsets

Skip initializing the thread aware LB for a cluster when the subset
load balancer is enabled. Also adds some extra checks for LB policies
that are incompatible with the subset load balancer.

Risk Level: low
Testing: test additional checks
Docs Changes: updated docs w.r.t subset lb compatibility
Release Notes: n/a
Fixes: #7651

Signed-off-by: Stephan Zuercher <[email protected]>

Signed-off-by: Nicolas Flacco <[email protected]>

Description:
Upgrade bazel to 0.29.1 and bazel-toolchains to corresponding version.

Risk Level: Low
Testing: CI
Docs Changes: N/A
Release Notes: N/A

Signed-off-by: Lizan Zhou <[email protected]>

Previously, when in a panic state, requests would be routed to all
hosts. In some cases it is instead preferable to not route any requests.
Add a configuration option for zone-aware load balancers which switches
from routing to all hosts to no hosts.

Closes #7550.

Signed-off-by: James Forcier [email protected]

Risk Level: Low
Testing: 2 new unit tests written; manual testing
Docs Changes: Note about new configuration option added
Release Notes: added

Signed-off-by: James Forcier <[email protected]>

Signed-off-by: Rama Chavali <[email protected]>

Signed-off-by: Pengyuan Bian <[email protected]>

…8189)

Signed-off-by: Antonio Vicente <[email protected]>

Signed-off-by: Lisa Lu <[email protected]>

Description: Looks like the runtime docs moved under operations/. The PR fixes the link.
Risk Level: low
Testing: existing
Docs Changes: this
Release Notes: n/a

Signed-off-by: Derek Argueta <[email protected]>

…llThreads interface to Slot. (#8135)

See the issue in #7902, this PR is to make the SlotImpl detachable from its owner, by introducing a Booker object wraps around a SlotImpl, which bookkeeps all the on-the-fly update callbacks. And on its destruction, if there are still on-the-fly callbacks, move the SlotImpl to an deferred-delete queue, instead of destructing the SlotImpl which may cause an SEGV error.

More importantly, introduce a new runOnAllThreads(ThreadLocal::UpdateCb cb) API to Slot, which requests a Slot Owner to not assume that the Slot or its owner will out-live (in Main thread) the fired on-the-fly update callbacks, and should not capture the Slot or its owner in the update_cb.

Picked RDS and config-providers-framework as examples to demonstrate that this change works. {i.e., changed from the runOnAllThreads(Event::PostCb) to the new runOnAllThreads(TLS::UpdateCb) interface. }

Risk Level: Medium
Testing: unit test
Docs Changes: N/A
Release Notes: N/A
[Optional Fixes #Issue] #7902

Signed-off-by: Xin Zhuang <[email protected]>

Build the config programmatically to make future API changes less
onerous.

Risk Level: low (test change only)
Testing: n/a
Doc Changes: n/a
Release Notes: n/a

Signed-off-by: Stephan Zuercher <[email protected]>