Before this patch, a log reader is able to block all log writes
indefinitely (and other operations) by simply opening the log stream and
not consuming all the messages.
The reason for this is we protect the read stream from corruption by
ensuring there are no new writes while the log stream is consumed (and
caught up with the live entries).
We can get around this issue because log files are append only, so we
can limit reads to only the section of the file that was written to when
the log stream was first requested.
Now logs are only blocked until all files are opened, rather than
streamed to the client.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: e2209185ed1c959131d4068ec7fc93e194dc0802
Component: engine
the filemode should be 0640 but not 06400
Signed-off-by: Lei Jitang <leijitang@huawei.com>
Upstream-commit: 96ea8eaa1592856e0829c3465e64f93911d3e389
Component: engine
logger.PutMessage, added in #28762 (v17.04.0-ce), clears msg.Source. So journald
and syslog were treating stderr messages as if they were stdout.
Signed-off-by: David Glasser <glasser@davidglasser.net>
Upstream-commit: 917050c5728f2fb9958ccb3ab66a23766f741adc
Component: engine
When closing the log-file, and the file is already
closed, there's no need to log an error.
This patch adds a `closed` boolean to check if the
file was closed, and if so, skip closing the file.
This prevents errors like this being logged:
level=error msg="Error closing logger: invalid argument"
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 07b51ed300429e88871e40b4d67dc031e2e8901c
Component: engine
This is required for swarmkit to be able to filter based on log driver.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 17abacb8946ed89496fcbf07a0288fafe24cb7b0
Component: engine
Logging plugins use the same HTTP interface as other plugins for basic
command operations meanwhile actual logging operations are handled (on
Unix) via a fifo.
The plugin interface looks like so:
```go
type loggingPlugin interface {
StartLogging(fifoPath string, loggingContext Context) error
StopLogging(fifoPath)
```
This means a plugin must implement `LoggingDriver.StartLogging` and
`LoggingDriver.StopLogging` endpoints and be able to consume the passed
in fifo.
Logs are sent via stream encoder to the fifo encoded with protobuf.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 27bd6842f8518780b99fdb42f8e7f84c17856d87
Component: engine
Refactor container logs system to make communicating log messages
internally much simpler. Move responsibility for marshalling log
messages into the REST server. Support TTY logs. Pave the way for fixing
the ambiguous bytestream format. Pave the way for fixing details.
Signed-off-by: Drew Erny <drew.erny@docker.com>
Upstream-commit: 1044093bb0aa12eb8972361a93b9bc8c4ddd857b
Component: engine
text does not appear to contain a placeholder
Signed-off-by: Helen Xie <chenjg@harmonycloud.cn>
Upstream-commit: 2a8d6368d4a930203b93f75914173ab65bf3b0bc
Component: engine
Make sure that the cursor value returned by followJournal() is the last
of the values returned by its goroutine's calls to drainJournal() by
waiting for it, rather than returning a value that may be superceded by
another if we're singalling the goroutine that it should exit by closing
a pipe.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
Upstream-commit: d57c330617efb97cad736a3e4ede82bb46ebbbf2
Component: engine
This loop is not ever going to return since it's never actually setting
the `err` var except on the first iteration.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 7a179972ff963706404f91671960b144dec98d65
Component: engine
RFC 5424 (https://tools.ietf.org/html/rfc5424#section-6.2) requires that
STRUCTURED-DATA be present, either as NILVALUE (-) or as one or more
SD-ELEMENT items. Because Docker doesn't ever create any SD-ELEMENT items,
the format should output the NILVALUE instead. This resolves parsing issues
in various RFC 5424-compliant syslog servers.
Signed-off-by: Mark Parker <godefroi@gmail.com>
Upstream-commit: b7d802bbccdf7ec6e4cc1ead733663cdce9768c0
Component: engine
This reduces allocs and bytes used per log entry significantly as well
as some improvement to time per log operation.
Each log driver, however, must put messages back in the pool once they
are finished with the message.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 3f4fccb65f0ef286c9c4e0f01c4ae7bb09a6ad89
Component: engine
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>
Upstream-commit: 054abff3b67bb5d66323e5418a43c845a3eac8a1
Component: engine
This fix tries to address the issue raised in 29344 where it was
not possible to create log group for awslogs (CloudWatch) on-demand.
Log group has to be created explicitly before container is running.
This behavior is inconsistent with AWS logs agent where log groups
are always created as needed.
There were several concerns previously (See comments in 19617 and 29344):
1. There is a limit of 500 log groups/account/region so resource might
be exhausted if there is any typo or incorrect region.
2. Logs are generated for every container so CreateLogGroup (or equally,
DescribeLogGroups) might be called every time, which is redundant and
potentially surprising.
3. CreateLogStream and CreateLogGroup have different IAM policies.
This fix addresses the issue by add `--log-opt awslogs-create-group`
which by default is `false`. It requires user to explicitly request
that log groups be created as needed.
Related unit test has been updated. And tests have also been done
manually in AWS.
This fix fixes 29334.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: 864b0c2e47e66e1037115b5d7267e641ba776d49
Component: engine
In the journald log driver, attempt to drain the journal 1 more time
after being told to stop following the log. Due to a possible race
condition, sometimes data is written to the journal at almost the same
time the log watch is closed, and depending on the order of operations,
sometimes you miss the last journal entry.
Signed-off-by: Andy Goldstein <agoldste@redhat.com>
Upstream-commit: 76f58d7294259bd9bbc91082077d32bbbcb9fd9a
Component: engine
This commit addresses 2 issues:
1. in `tailfile()` if somehow the `logWatcher.Msg` were to become full and the watcher closed before space was made into it, we were getting stuck there forever since we were not checking for the watcher getting closed
2. when servicing `docker logs`, if the command was cancelled we were not closing the watcher (and hence notifying it to stop copying data)
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
Upstream-commit: fb2bb3653e2755d971f21debfecbd7c878a3c23f
Component: engine
