13173
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Ran 06 Mar 2019 09:14PM UTC

Jobs 1

Files 259

Run time 195min

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Build # 13173

Build Type

push

travis-ci

Committed by

web-flow

Commit Message

grpclb: support "pick_first" child policy (#5438)

The PICK_FIRST mode puts all backend addresses in a single Subchannel. There are a few points where it's different from the default ROUND_ROBIN mode:

1. PICK_FIRST doesn't eagerly connect to backends like ROUND_ROBIN does. Instead, it requests for connections when the Subchannel is picked.

2. PICK_FIRST adds tokens to the headers via a different code path (`TokenAttachingTracerFactory`) than ROUND_ROBIN

3. For simple implementation, when the mode is changed by service config when the LoadBalancer is working, we will shut down `GrpclbState` and starts a new one with the new mode. All connections will be closed during the transition. We don't expect this to happen in practice given the specific use case of PICK_FIRST.

Run Details

14187 of 16272 relevant lines covered (87.19%)

0.87 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	13173.1	06 Mar 2019 09:14PM UTC	0	87.19	Travis Job 13173.1

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