This PR replaces the original boolean used to configure transparent
proxy mode. It was replaced with a string mode that can be set to:
- "": Empty string is the default for when the setting should be
defaulted from other configuration like config entries.
- "direct": Direct mode is how applications originally opted into the
mesh. Proxy listeners need to be dialed directly.
- "transparent": Transparent mode enables configuring Envoy as a
transparent proxy. Traffic must be captured and redirected to the
inbound and outbound listeners.
This PR also adds a struct for transparent proxy specific configuration.
Initially this is not stored as a pointer. Will revisit that decision
before GA.
This is needed in case the client proxy is in TransparentProxy mode.
Typically they won't have explicit configuration for every upstream, so
this ensures the settings can be applied to all of them when generating
xDS config.
New clients in transparent proxy mode can send requests for service
config resolution without any upstream args because they do not have
explicitly defined upstreams.
Old clients on the other hand will never send requests without the
Upstreams args unless they don't have upstreams, in which case we do not
send back upstream config.
As part of this change the indexer will now be case insensitive by using
the lower case value. This should be safe because previously we always
had lower case strings.
This change was made out of convenience. All the other indexers use
lowercase, so we can re-use the indexFromQuery function by using
lowercase here as well.
Previously we were encoding the UUID as a string, but the index it references uses a UUID
so this index can also use an encoded UUID to save a bit of memory.
Prefix queries are generally being used to match part of a partial
index. We can support these indexes by using a function that accept
different types for each subset of the index.
What I found interesting is that in the generic StringFieldIndexer the
implementation for PrefixFromArgs would remove the trailing null, but
at least in these 2 cases we actually want a null terminated string.
We simply want fewer components in the string.
The TestServiceHealthEventsFromChanges function was over 1400 lines.
Attempting to debug test failures in test functions this large is
difficult. It requires scrolling to the line which defines the testcase
because the failure message only includes the line number of the
assertion, not the line number of the test case.
This is an excellent example of where test tables stop working well, and
start being a problem. To mitigate this problem, the runCase pattern can
be used. When one of these tests fails, a failure message will print the
line number of both the test case and the assertion. This allows a
developer to quickly jump to both of the relevant lines, signficanting
reducing the time it takes to debug test failures.
For example, one such failure could look like this:
catalog_events_test.go:1610: case: service reg, new node
catalog_events_test.go:1605: assertion failed: values are not equal
ResolveServiceConfig is called by service manager before the proxy
registration is in the catalog. Therefore we should pass proxy
registration flags in the request rather than trying to fetch
them from the state store (where they may not exist yet).
This is done because after removing ID and NodeName from
ServiceConfigRequest we will no longer know whether a request coming in
is for a Consul client earlier than v1.10.
This enables it to be called for many upstreams or downstreams of a
service while only querying intentions once.
Additionally, decisions are now optionally denied due to L7 permissions
being present. This enables the function to be used to filter for
potential upstreams/downstreams of a service.
Previously this type was defined in structs, but unlike the other types in structs this type
is not used by RPC requests. By moving it to state we can better indicate that this is not
an API type, but part of the state implementation.
I added this recently without realizing that the method already existed and was named
NamespaceOrEmpty. Replace all calls to GetNamespace with NamespaceOrEmpty or NamespaceOrDefault
as appropriate.
Document that this comparison should roughly match MatchesKey
Only sort by overrideKey or service name, but not both
Add namespace to the sort.
The client side also builds a map of these based on the namespace/node/service key, so the only order
that really matters is the ordering of register/dereigster events.
Refactored out a function that can be used for both the snapshot and stream of events to translate
an event into an appropriate connect event.
Previously terminating gateway events would have used the wrong key in the snapshot, which would have
caused them to be filtered out later on.
Also removed an unused function, and some commented out code.
freddygv