f3599ba3c9
Automatic merge from submit-queue (batch tested with PRs 61962, 58972, 62509, 62606). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Avoid data races in unit tests Setting global flags in unit tests leads to data races like this: ``` ================== WARNING: DATA RACE Write at 0x0000028f5241 by goroutine 47: flag.(*boolValue).Set() /home/jliggitt/.gvm/gos/go1.9.5/src/flag/flag.go:91 +0x7b flag.(*FlagSet).Set() /home/jliggitt/.gvm/gos/go1.9.5/src/flag/flag.go:366 +0x10c flag.Set() /home/jliggitt/.gvm/gos/go1.9.5/src/flag/flag.go:379 +0x76 k8s.io/kubernetes/pkg/kubelet/cm/devicemanager.TestPodContainerDeviceAllocation() /home/jliggitt/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/manager_test.go:549 +0x126 testing.tRunner() /home/jliggitt/.gvm/gos/go1.9.5/src/testing/testing.go:746 +0x16c Previous read at 0x0000028f5241 by goroutine 34: k8s.io/kubernetes/vendor/github.com/golang/glog.(*loggingT).output() /home/jliggitt/go/src/k8s.io/kubernetes/vendor/github.com/golang/glog/glog.go:682 +0x730 k8s.io/kubernetes/vendor/github.com/golang/glog.(*loggingT).printf() /home/jliggitt/go/src/k8s.io/kubernetes/vendor/github.com/golang/glog/glog.go:655 +0x259 k8s.io/kubernetes/vendor/github.com/golang/glog.Errorf() /home/jliggitt/go/src/k8s.io/kubernetes/vendor/github.com/golang/glog/glog.go:1118 +0x74 k8s.io/kubernetes/pkg/kubelet/cm/devicemanager.(*endpointImpl).run() /home/jliggitt/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/endpoint.go:132 +0x1c7e k8s.io/kubernetes/pkg/kubelet/cm/devicemanager.(*ManagerImpl).addEndpoint.func1() /home/jliggitt/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/manager.go:378 +0x3f Goroutine 47 (running) created at: testing.(*T).Run() /home/jliggitt/.gvm/gos/go1.9.5/src/testing/testing.go:789 +0x568 testing.runTests.func1() /home/jliggitt/.gvm/gos/go1.9.5/src/testing/testing.go:1004 +0xa7 testing.tRunner() /home/jliggitt/.gvm/gos/go1.9.5/src/testing/testing.go:746 +0x16c testing.runTests() /home/jliggitt/.gvm/gos/go1.9.5/src/testing/testing.go:1002 +0x521 testing.(*M).Run() /home/jliggitt/.gvm/gos/go1.9.5/src/testing/testing.go:921 +0x206 main.main() k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/_test/_testmain.go:68 +0x1d3 Goroutine 34 (finished) created at: k8s.io/kubernetes/pkg/kubelet/cm/devicemanager.(*ManagerImpl).addEndpoint() /home/jliggitt/go/src/k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/manager.go:377 +0x9d6 ================== --- FAIL: TestPodContainerDeviceAllocation (0.00s) testing.go:699: race detected during execution of test FAIL FAIL k8s.io/kubernetes/pkg/kubelet/cm/devicemanager 0.124s ```
Kubernetes
Kubernetes is an open source system for managing containerized applications across multiple hosts; providing basic mechanisms for deployment, maintenance, and scaling of applications.
Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.
Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF). If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented, consider joining the CNCF. For details about who's involved and how Kubernetes plays a role, read the CNCF announcement.
To start using Kubernetes
See our documentation on kubernetes.io.
Try our interactive tutorial.
Take a free course on Scalable Microservices with Kubernetes.
To start developing Kubernetes
The community repository hosts all information about building Kubernetes from source, how to contribute code and documentation, who to contact about what, etc.
If you want to build Kubernetes right away there are two options:
You have a working Go environment.
$ go get -d k8s.io/kubernetes
$ cd $GOPATH/src/k8s.io/kubernetes
$ make
You have a working Docker environment.
$ git clone https://github.com/kubernetes/kubernetes
$ cd kubernetes
$ make quick-release
For the full story, head over to the developer's documentation.
Support
If you need support, start with the troubleshooting guide, and work your way through the process that we've outlined.
That said, if you have questions, reach out to us one way or another.