cb6d7133ac
Refactor autoconfigure registerShutdownHook(boolean) to disableShutdownHook() ( #5565 )
2023-06-22 16:02:32 -05:00
07a1bb4419
Fix various gradle warnings ( #5556 )
2023-06-21 11:15:05 -05:00
26dd5d8fdf
Fix OTLP exporter artifact name in an error message ( #5541 )
2023-06-15 14:02:02 -05:00
bbf7822e67
Use managed guava version in :sdk-extensions:jaeger-remote-sampler ( #5486 )
2023-05-31 06:51:58 -05:00
e05e4fed87
Bump com.google.guava:guava from 31.1-jre to 32.0.0-jre ( #5485 )
...
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2023-05-30 12:05:21 -05:00
85f3fd8545
Enable otlp logs by default ( #5433 )
2023-05-17 09:19:36 -05:00
06cc7c1d67
Merge otlp logs ( #5432 )
2023-05-15 07:14:35 -05:00
8a917e036c
Promote log API / SDK to stable ( #5341 )
2023-05-10 06:45:20 -05:00
030d966c0a
Log Bridge API / SDK cleanup ( #5420 )
2023-05-05 13:37:55 -05:00
db8ade397f
Add new TLS related APIs on Jaeger buiders. ( #5422 )
2023-05-05 13:35:48 -05:00
4af30515a4
fixes jaeger remote sampler service strategies bug ( #5418 )
2023-05-05 07:23:25 -05:00
034d65bfc1
Fix a typo in autoconfigure-spi module. ( #5409 )
2023-04-27 07:30:22 -05:00
fb3dce4593
Fix flakey JaegerRemoteSamplerGrpcNettyTest ( #5385 )
2023-04-16 21:15:00 -05:00
76eaea2959
Add skaffolding for low level exporter SSL API ( #5362 )
2023-04-14 15:46:03 -05:00
ecc41c7f5a
Align BatchLogRecordProcessor defaults with specification ( #5364 )
2023-04-10 14:21:34 -05:00
38e38cb29f
Bump com.diffplug.spotless:spotless-plugin-gradle from 6.17.0 to 6.18.0 ( #5352 )
...
* Bump com.diffplug.spotless:spotless-plugin-gradle from 6.17.0 to 6.18.0
Bumps [com.diffplug.spotless:spotless-plugin-gradle](https://github.com/diffplug/spotless ) from 6.17.0 to 6.18.0.
- [Release notes](https://github.com/diffplug/spotless/releases )
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md )
- [Commits](https://github.com/diffplug/spotless/compare/gradle/6.17.0...gradle/6.18.0 )
---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-plugin-gradle
dependency-type: direct:production
update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>
* spotless
---------
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jack Berg <jberg@newrelic.com>
2023-04-06 15:13:11 -05:00
f4d464a1c0
Bump com.squareup.wire:wire-gradle-plugin from 4.5.2 to 4.5.3 ( #5323 )
...
* Bump com.squareup.wire:wire-gradle-plugin from 4.5.2 to 4.5.3
Bumps [com.squareup.wire:wire-gradle-plugin](https://github.com/square/wire ) from 4.5.2 to 4.5.3.
- [Release notes](https://github.com/square/wire/releases )
- [Changelog](https://github.com/square/wire/blob/master/CHANGELOG.md )
- [Commits](https://github.com/square/wire/compare/4.5.2...4.5.3 )
---
updated-dependencies:
- dependency-name: com.squareup.wire:wire-gradle-plugin
dependency-type: direct:production
update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>
* Remove newly redundant gradle config
* jApiCmp
* Bump to 4.5.4
---------
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jack Berg <jberg@newrelic.com>
2023-04-04 16:11:14 -05:00
fa36775d55
JaegerRemoteSampler use upstream grpc implementation if ManagedChannel is set ( #5287 )
...
* JaegerRemoteSampler only uses upstream grpc implementation if ManagedChannel is set
* Restore builder constructor
2023-03-24 13:35:48 -05:00
e2817eba4d
Drop OTLP exponential histogram environment variable option ( #5290 )
2023-03-16 18:20:25 -07:00
102a03a167
Prepare for 1.24.0 ( #5278 )
...
* Prepare changelog for 1.24.0 release
* Add missing since annotations
2023-03-10 09:36:08 -06:00
2babc69924
Introduce mTLS support for JaegerRemoteSamplerBuilder ( #5209 ) ( #5248 )
2023-03-09 10:11:36 -06:00
018a76670c
Bump com.google.protobuf:protobuf-bom from 3.21.12 to 3.22.0 ( #5237 )
...
* Bump com.google.protobuf:protobuf-bom from 3.21.12 to 3.22.0
Bumps [com.google.protobuf:protobuf-bom](https://github.com/protocolbuffers/protobuf ) from 3.21.12 to 3.22.0.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases )
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/generate_changelog.py )
- [Commits](https://github.com/protocolbuffers/protobuf/compare/v3.21.12...v3.22.0 )
---
updated-dependencies:
- dependency-name: com.google.protobuf:protobuf-bom
dependency-type: direct:production
update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>
* Fix dependencies
* Add japicmp exception for protobuf 3.22 upgrade
* Delete compatibility test
---------
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jack Berg <jberg@newrelic.com>
2023-03-08 09:35:09 -06:00
895075f9e5
Add TlsConfigHelper for additional TLS configurability ( #5246 )
...
* add TlsConfigHelper for additional TLS configurability and wire up internal builders.
* add javadoc and spotless
* add keys for "validity" testing.
* fix tests
* fix tests
* address code review comments
* fix typo
* allow keymanager to be nullable.
* fix test
* so....much...null......away
* backfill tests
* checkstyle
* test coverage
* address code review comments
2023-03-07 12:54:26 -06:00
06158ffc2d
Cleanup readmes ( #5263 )
2023-03-06 09:39:34 -06:00
a483171f75
Allow views to select on instrument unit ( #5255 )
2023-03-01 09:17:05 -06:00
ce18841b5d
Fixed example resource provider classname. ( #5235 )
2023-02-17 10:39:13 -08:00
793cb9db8c
Fix test flake in FullConfigTest ( #5230 )
...
* Fix test flake in FullConfigTest
* spotless
2023-02-15 18:22:49 -06:00
219729a45d
Fix autoconfigure shutdown hook ( #5221 )
...
* Fix autoconfigure shutdown hook
* Add unit test
2023-02-15 12:27:40 -06:00
feb0297c7b
Add Base2 prefix to internal exponential histogram classes ( #5179 )
2023-02-07 10:14:10 -06:00
92403b01b7
Add base2ExponentialHistogram to Aggregation ( #5143 )
2023-02-05 10:54:44 -06:00
cdf13a7c10
docs(readme): fix resource providers property docs ( #5135 )
2023-02-04 08:07:08 -08:00
0ac01c6cec
Event emitter provider ( #5049 )
...
* Split out :api:events
* Remove events from :api:logs
* Log SDK also implements Events API
* Fix example
* Add SdkEventEmitterProvider which delegates to LoggerProvider
* Make eventDomain argument optional
2023-02-03 15:45:40 -06:00
8b01e78f42
Switch from snakeyaml to snakeyaml-engine ( #5138 )
...
* switch from snakeyaml to snakeyaml-engine
* spotless
2023-01-26 15:29:08 -08:00
6edba790d8
Cleanup autoconfigured resources in case of exception ( #5117 )
...
* Cleanup autoconfigured resources in case of exception
* Improve test coverage
* Spotless
* Reduce logging level to info for multiple shutdowns
* Fix build
2023-01-22 09:25:50 -06:00
f28e0ada45
Support parentbased_jaeger_remote sampler. ( #5123 )
2023-01-20 20:05:36 -08:00
a3ac819a0b
support the "none" option for propagator configuration ( #5121 )
2023-01-20 06:27:54 -08:00
2360de9add
Make implicit gradle dependencies explicit ( #5137 )
2023-01-18 16:12:55 -06:00
8897dd4d5c
Revert removal final newline ( #5133 )
...
* Revert removal final newline
* Add to final newlin editorconfigoverride
2023-01-18 08:51:41 -06:00
1e4a7be6be
Bump spotless-plugin-gradle from 6.12.1 to 6.13.0 ( #5126 )
...
* Bump spotless-plugin-gradle from 6.12.1 to 6.13.0
Bumps [spotless-plugin-gradle](https://github.com/diffplug/spotless ) from 6.12.1 to 6.13.0.
- [Release notes](https://github.com/diffplug/spotless/releases )
- [Changelog](https://github.com/diffplug/spotless/blob/main/CHANGES.md )
- [Commits](https://github.com/diffplug/spotless/compare/gradle/6.12.1...plugin-gradle/6.13.0 )
---
updated-dependencies:
- dependency-name: com.diffplug.spotless:spotless-plugin-gradle
dependency-type: direct:production
update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>
* Fix build
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jack Berg <jberg@newrelic.com>
2023-01-17 16:47:56 -06:00
4df4a0ae09
Add shutdown / close to OpenTelemetrySdk ( #5100 )
...
* Add shutdown / close to OpenTelemetrySdk
* Shutdown hook closes instead of shutdown
2023-01-10 16:05:21 -06:00
50e7a17309
Remove deprecated autoconfigure options ( #5098 )
2023-01-09 10:45:30 -06:00
b08edb6504
Add MaxScale config parameter to ExponentialHistogram ( #5044 )
2023-01-06 09:36:48 -06:00
037d7cc293
Cleanup autoconfigure tests ( #5070 )
...
* Cleanup global and surpress logs
* Move SPI implementations to provider package
2022-12-29 16:42:48 -06:00
17e81063ba
Align exemplar filter names with spec ( #5063 )
...
* Align exemplar filter names with spec
* coverage
* spotless
2022-12-29 11:11:39 -06:00
2834b03b88
Move autoconfigure otlp tests ( #5060 )
...
* Unify OtlpHttp{Signal}Exporter testing
* Add header and compression tests
* Move SPI otlp tests to :exporters:otlp
* Improve test coverage
* Improve test coverage
2022-12-29 11:07:47 -06:00
9dfb00249e
Implement prometheus exporter provider ( #5053 )
...
* Implement prometheus exporter provider
* Remove stray comment
* Adjust method visibility
* Delete ClasspathUtil
2022-12-21 09:52:42 -06:00
7f0889a6a3
Move autoconfigure exporter tests ( #5051 )
...
* Move SPI logging-otlp tests to :exporters:logging-otlp
* Move SPI zipkin tests to :exporters:zipkin
* Move SPI jaeger tests to :exporters:jaeger
* Spotless
2022-12-21 08:23:21 -06:00
5b497b115d
Implement otlp exporter providers ( #5003 )
...
* Implement otlp exporter providers
* Remove redundant else
* Restore unsupported protocol test
2022-12-18 07:57:55 -06:00
10e32fe80c
Implement jaeger exporter provider ( #5002 )
2022-12-17 15:20:14 -06:00
551e764df8
JIT exporter metrics ( #4993 )
...
* Build ExporterMetrics instruments just in time
* Exporters use GlobalOpenTelemetry#getMeterProvider() if meter provider is not set
* FullConfigTest reset GlobalOpenTelemetry
* MetricExporters use MeterProvider.noop()
2022-12-17 15:19:00 -06:00
7c6f1bd73e
GlobalOpenTelemetry trigger of autoconfiguration is opt-in ( #5010 )
...
* Do not initialize AutoConfiguredOpenTelemetrySdk in OpenTelemetry.get
* GlobalOpenTelemetry triggers autoconfigure based on env var / system property
2022-12-14 15:10:55 -06:00
2a231d76f8
Move DefaultConfigProperties to autoconfigure-spi ( #5001 )
2022-11-30 10:18:53 -06:00
e79aad8dcd
Implement logging-otlp exporter providers ( #4992 )
2022-11-29 10:39:35 -06:00
0fc41d4c30
Implement zipkin exporter provider ( #4991 )
2022-11-28 14:08:13 -06:00
7dd5c1ccd7
Add auto-configure support for logging-otlp ( #4879 )
...
* Add autoconfigure support for logging-otlp
* Add NotOnClasspath tests
* Fix formatting
* Declare logging-otlp as experimental, add unit test
* Spotless
Co-authored-by: Jack Berg <jberg@newrelic.com>
2022-11-28 11:15:31 -06:00
cbd629c579
Implement logging exporter providers ( #4950 )
2022-11-28 10:14:44 -06:00
ee2d981bdc
Remove support for otel.experimental.sdk.enabled ( #4973 )
2022-11-26 09:16:59 -06:00
61b117079d
De-singleton ZPageServer implementation ( #4935 )
...
* remove the static/singleton nature from ZPageServer
* add convenience method for creating zpages-based sdktracerprovider
* update readme for zpageserver
* oh checkstyle.
* overload build and add test
2022-11-12 08:49:56 -06:00
34beb4d71c
Deprecate :extensions:aws ( #4862 )
...
* Deprecate :extensions:aws
* Add deprecation notice to README.md
* Include link to new location opentelemetry-java-contrib
2022-11-02 12:16:46 -05:00
6184e19812
Make description of Samplers Locale independent ( #4887 )
...
* Make description of Samplers Locale independent
* Switch from String.format to concatanation
* Moved description creation to constructor
2022-10-31 12:26:16 -05:00
52c37d56da
Stop publishing opentelemetry-sdk-extension-resources artifact ( #4828 )
2022-10-31 12:25:36 -05:00
db1d0652b2
Decode resource attributes specified via otel.resource.attributes ( #4756 )
2022-10-18 11:45:34 -05:00
88779d3115
Bump wire-compiler from 4.3.0 to 4.4.2 ( #4856 )
...
* Bump wire-compiler from 4.3.0 to 4.4.2
Bumps [wire-compiler](https://github.com/square/wire ) from 4.3.0 to 4.4.2.
- [Release notes](https://github.com/square/wire/releases )
- [Changelog](https://github.com/square/wire/blob/master/CHANGELOG.md )
- [Commits](https://github.com/square/wire/compare/4.3.0...4.4.2 )
---
updated-dependencies:
- dependency-name: com.squareup.wire:wire-compiler
dependency-type: direct:production
update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>
* Fix ProtoFieldsWireHandler
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jack Berg <jberg@newrelic.com>
2022-10-18 07:52:39 -07:00
99dbcaf3c6
Add support for BatchLogRecordProcessor autoconfiguration ( #4811 )
2022-10-17 14:41:45 -05:00
6fa504df97
Fix broken link ( #4861 )
2022-10-17 13:00:16 -05:00
cc22880bb8
Stop publishing opentelemetry-sdk-extension-aws artifact ( #4830 )
2022-10-14 07:51:17 -05:00
3f4698a536
Ensure done before checking success to help troubleshoot timeout issues ( #4833 )
...
* ensure done before checking success to help troubleshoot timeout issues
* add done check to testDefaultRetryPolicy method as well.
* ensure isDone() before other assertions
2022-10-13 13:13:22 -05:00
3a61673450
Prepare release 1.19.0 ( #4821 )
...
* wip
* Add changelog entry for 1.19.0
* Add new since annotations
* Add late additions to changelog
* PR feedback
* Fix 1.18.0 ref
2022-10-07 09:00:45 -05:00
bd0cf78c39
Ensure GlobalLoggerProvider is set once ( #4804 )
...
* Ensure GlobalLoggerProvider is set once
* Add GlobalLoggerProviderTest
* PR feedback
2022-10-03 13:47:36 -05:00
c37dada000
Add support for new system property otel.sdk.disabled ( #4810 )
...
* Add support for new system property otel.sdk.disabled
* address review comments
2022-10-03 11:51:57 -05:00
7b56506a73
Deprecate opentelemetry-sdk-extension-aws ( #4749 )
2022-10-01 10:08:10 -05:00
3ee7bbd165
Fix ProcessResource directory separator ( #4782 )
...
* Fix ProcessResource directory separator
* spotless
2022-10-01 09:56:15 -05:00
e1519bdd3d
Deprecate opentelemetry-sdk-extension-resources ( #4748 )
2022-10-01 09:54:45 -05:00
a1cf20d1c5
Rename LogProcessor to LogRecordProcessor ( #4772 )
2022-09-26 11:02:49 -05:00
647ed91c15
Rename LogData to LogRecordData ( #4774 )
...
* Rename LogData to LogRecordData
* spotless
2022-09-26 10:30:59 -05:00
9b17be3114
Rename LogExporter to LogRecordExporter ( #4773 )
2022-09-26 09:57:30 -05:00
f7317c6e8d
Split out logs API ( #4764 )
2022-09-22 13:23:52 -05:00
6209109e0a
Change LogEmitter to Logger, LogEmitterProvider to LoggerProvider ( #4721 )
2022-09-16 13:41:30 -05:00
6c11793bd2
Add experimental ConditionalResourceProvider interface ( #4731 )
...
* Add experimental ConditionalResourceProvider interface
* Add tests
2022-09-08 13:10:43 -05:00
aea98ba885
Fix container detection fails in k8s with containerd v1.5.0+ environments ( #4733 )
...
* pr with issue#4730
* PR for issue#4730
Signed-off-by: wuzhaoyin <1449259282@qq.com>
* Annotation adjustment
Signed-off-by: wuzhaoyin <1449259282@qq.com>
* fix code owner review required fail
Signed-off-by: wuzhaoyin <1449259282@qq.com>
Signed-off-by: wuzhaoyin <1449259282@qq.com>
2022-09-08 11:23:45 -05:00
b5ef538e5e
Improve detection of resource attributes on ECS ( #4574 )
...
* Improve detection of resource attributes on ECS
This improves the detection of resource attributes on ECS by fetching ECS metadata from `ECS_CONTAINER_METADATA_URI` or `ECS_CONTAINER_METADATA_URI_V4`.
Previously only `CONTAINER_NAME` and `CONTAINER_ID` id were set.
Now we set:
- CONTAINER_ID
- CONTAINER_NAME
- AWS_ECS_CONTAINER_ARN
- CONTAINER_IMAGE_NAME
- CONTAINER_IMAGE_TAG
- aws.ecs.container.image.id
- AWS_LOG_GROUP_ARNS
- AWS_LOG_GROUP_NAMES
- AWS_LOG_STREAM_NAMES
- AWS_ECS_TASK_ARN
- AWS_ECS_TASK_FAMILY
- AWS_ECS_TASK_REVISION
Especially AWS_LOG_GROUP_ARNS is important so that connection of traces to logs works OOTB on X-Ray.
* Change „24“ to „26“ in fixtures for consistency
`CONTAINER_NAME` and `AWS_ECS_TASK_REVISION` should match
* Implement a few more attributes, fix ARNs
This commit adds implementations for the `aws.ecs.launchtype`
and `aws.logs.stream.arns` attributes, as well as fixing
the generation of log group ARNs.
* EcsResource: Record log group without trailing :*
Both with and without trailing `:*` are valid formats but there is a bug in the OpenTelementry collector which can’t handle the trailing `:*` (for now) (see https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/13702 )
So remove addition of the trailing `:*` for now.
Co-authored-by: Michele Mancioppi <michelem@lumigo.io>
2022-09-08 10:20:58 -05:00
def1c85b60
Drop opentelemetry-sdk-extension-jfr-events, which moved to opentelemetry-java-contrib ( #4703 )
2022-08-25 08:46:45 -05:00
926b57143a
Merge trace and metric incubator ( #4705 )
2022-08-24 09:59:42 -05:00
6eea0389af
Move :sdk-extensions:zpages to :sdk-extensions:tracing-incubator ( #4694 )
2022-08-17 15:41:07 -05:00
b979ea1427
Allow logs to be mutated by LogProcessor ( #4643 )
...
* Allow logs to be mutated by LogProcessor
* wip
* Improve test coverage
2022-08-11 15:52:22 -05:00
77be2e0136
Break out :exporters:common module ( #4575 )
...
* Break out :exporters:common module
* Comment out readme links
* spot
2022-08-08 08:28:24 -05:00
91bd17e09b
Add AutoConfigurationCustomizer#addPropertiesCustomizer() extension p… ( #4608 )
...
* Add AutoConfigurationCustomizer#addPropertiesCustomizer() extension point
* jApiCmp
* Update sdk-extensions/autoconfigure/src/main/java/io/opentelemetry/sdk/autoconfigure/AutoConfiguredOpenTelemetrySdkBuilder.java
Co-authored-by: jack-berg <34418638+jack-berg@users.noreply.github.com>
* since
Co-authored-by: jack-berg <34418638+jack-berg@users.noreply.github.com>
2022-08-07 15:57:33 -05:00
5def2f7fb2
Always pull ghrc.io/open-telemetry/opentelemetry-java/* images ( #4656 )
...
* Always pull ghrc.io/open-telemetry/opentelemetry-java/* images
* Unused import
* Add error logging to collector
* unused imports
* spot
* revert error logging
2022-08-07 15:56:07 -05:00
35680960cb
Fix autoconfigure documentation ( #4658 )
2022-08-07 15:55:36 -05:00
21abfa2b57
Add ConfigurableLogExporterProvider ( #4636 )
2022-07-28 15:04:45 -05:00
467a275825
Add ordering to autoconfigure SPIs ( #4609 )
...
* Add ordering to autoconfigure SPIs
* jApiCmp
* comments
2022-07-27 17:37:02 -05:00
a8086498b1
Add TestLogData, remove public LogDataImpl and LogDataBuilder from log SDK ( #4635 )
...
* Add TestLogData, remove public LogDataImpl and LogDataBuilder from log sdk
* pr comment
2022-07-27 13:15:25 -05:00
2ef73c83af
Support aggregation arguments for view file configuration ( #4588 )
...
* Support aggregation arguments for view file configuration
* Extract getBucketBoundaries function
2022-07-21 09:41:43 -05:00
7a2a5b379d
Update autoconfigure docs for multiple exporters ( #4619 )
2022-07-20 09:39:48 -05:00
d84a111273
Cache HttpUrl for exporters that use OkHttp ( #4616 )
2022-07-19 10:04:54 -05:00
d2a8304b9b
Otlp exporter default aggregation ( #4557 )
...
* Add default aggregation selector option to OTLP metric exporters
* change compose to with
2022-07-05 10:21:04 -05:00
6034c12650
Add javadoc about autoconfigure pitfall ( #4558 )
...
* Add javadoc about autoconfigure pitfall
* more
2022-06-30 09:40:34 -05:00
4c0cbba5d3
Add hyphen normalization to ConfigProperties ( #4564 )
2022-06-30 09:26:29 -05:00
cb864fd209
Fix metrics incubator docs ( #4567 )
2022-06-29 16:24:57 -05:00
0860b3884b
MetricReader and MetricExporter can determine default aggregation by instrument ( #4472 )
...
* MetricReader and MetricExporter can determine default aggregation by instrument
* Add since annotations
2022-06-28 15:39:26 -05:00
jack-berg
Mateusz Rzeszutek
dependabot[bot]
Francisco Bento
DondekarShraddha
chukun
Francisco Bento
jason plumb
Lin Lin
Bruno Medeiros
Fabio Salvini
John Watson
Ben Roling
Łukasz Monkiewicz
Bruno Baptista
wzy531a
Felix Scheinost
Trask Stalnaker