1. Store the RLS server name (lookupService field) as a string instead
of as a resolver.Target as this is passed to grpc.Dial when creating
the control channel.
2. Store the default target specified in the ServiceConfig in a field in
the lbConfig struct.
3. Move some constants defined in builder.go to config.go because they
are only used in the latter.
* Add a Resize method which will be invoked by the RLS LB policy when it
receives a new cacheSize in its ServiceConfig.
* Change the size fields in the cache to int64. This is the type of the
cacheSize field in the proto.
* Store the BackoffState field in the cache.Entry by value instead of as
a pointer because it doesn not buy us much (the backoff state is not
shared between the data cache and the pending cache).
Before this change, in EDS balancer, child balancer's state update is handled synchronously, which includes priority handling. This would cause a deadlock if the child policy sends a state update inline when handling addresses (e.g. when roundrobin handles empty address list).
This change moves the child balancer state handling into a goroutine, to avoid the problem.
- More logs in xds bootstrap/resolver/cds/eds
- Bootstrap file content/error
- Request/response on ADS stream
- Actions by client/resolver/balancer
- Content of updates
- Logs prefixed with component name and id
- `[xds-bootstrap]`
- `[xds-client <address>]`
- `[cds-lb <address>]`
- `[eds-lb <address>]`
- The LRS client will find known clusters from the response, and send the loads
- The LRS client support only one cluster now, will be extended to support multiple
This can happen when the xds ClientConn is in transient failure (a
config error on the server address or creds, or a connection error).
When this happens, the new watches should still be handled, and should
be notified of failure when timeout.
* Modified tests to use tlogger.
* Fail on errors, with error expectations.
* Added expects and MixedCapsed grpclb_config tests
* Moved tlogger to grpctest, moved leakcheck tester to grpctest.go
* Added ExpectErrorN()
* Removed redundant leak checks
* Fixed new test
* Made tlogger globals into tlogger methods
* ErrorsLeft -> EndTest
* Removed some redundant lines
* Fixed error in test and empty map in EndTest
