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Brian Goff 054abff3b6 Implement optional ring buffer for container logs 
This allows the user to set a logging mode to "blocking" (default), or
"non-blocking", which uses the ring buffer as a proxy to the real log
driver.

This allows a container to never be blocked on stdio at the cost of
dropping log messages.

Introduces 2 new log-opts that works for all drivers, `log-mode` and
`log-size`. `log-mode` takes a  value of "blocking", or "non-blocking"
I chose not to implement this as a bool since it is difficult to
determine if the mode was set to false vs just not set... especially
difficult when merging the default daemon config with the container config.
`log-size` takes a size string, e.g. `2MB`, which sets the max size
of the ring buffer. When the max size is reached, it will start
dropping log messages.

```
BenchmarkRingLoggerThroughputNoReceiver-8           	2000000000	        36.2 ns/op	 856.35 MB/s	       0 B/op	       0 allocs/op
BenchmarkRingLoggerThroughputWithReceiverDelay0-8   	300000000	       156 ns/op	 198.48 MB/s	      32 B/op	       0 allocs/op
BenchmarkRingLoggerThroughputConsumeDelay1-8        	2000000000	        36.1 ns/op	 857.80 MB/s	       0 B/op	       0 allocs/op
BenchmarkRingLoggerThroughputConsumeDelay10-8       	1000000000	        36.2 ns/op	 856.53 MB/s	       0 B/op	       0 allocs/op
BenchmarkRingLoggerThroughputConsumeDelay50-8       	2000000000	        34.7 ns/op	 894.65 MB/s	       0 B/op	       0 allocs/op
BenchmarkRingLoggerThroughputConsumeDelay100-8      	2000000000	        35.1 ns/op	 883.91 MB/s	       0 B/op	       0 allocs/op
BenchmarkRingLoggerThroughputConsumeDelay300-8      	1000000000	        35.9 ns/op	 863.90 MB/s	       0 B/op	       0 allocs/op
BenchmarkRingLoggerThroughputConsumeDelay500-8      	2000000000	        35.8 ns/op	 866.88 MB/s	       0 B/op	       0 allocs/op
```

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
2017-02-01 13:52:37 -05:00
..
api Implement optional ring buffer for container logs 2017-02-01 13:52:37 -05:00
extend Merge pull request #28627 from yongtang/28624-docker-plugin-ls 2017-02-01 16:52:00 +01:00
reference Merge pull request #29692 from yongtang/29492-daemon-shm-size 2017-02-01 16:56:10 +01:00
static_files Putting back the missing image back in the repo. 2016-10-26 12:34:24 +05:30
deprecated.md Merge pull request #28437 from thaJeztah/deprecate-default-network-inspect 2016-12-13 08:58:57 +01:00
README.md Sync docker/docker refs with files mistakenly edited in docker.github.io repo 2016-10-20 10:51:30 -07:00

README.md

The non-reference docs have been moved!

The documentation for Docker Engine has been merged into the general documentation repo.

See the README for instructions on contributing to and building the documentation.

If you'd like to edit the current published version of the Engine docs, do it in the master branch here: https://github.com/docker/docker.github.io/tree/master/engine

If you need to document the functionality of an upcoming Engine release, use the vnext-engine branch: https://github.com/docker/docker.github.io/tree/vnext-engine/engine

The reference docs have been left in docker/docker (this repo), which remains the place to edit them.

The docs in the general repo are open-source and we appreciate your feedback and pull requests!