ecfff6620c
Automatic merge from submit-queue (batch tested with PRs 51750, 53195, 53384, 53410). 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>. outputs `<none>` for colums not found **What this PR does / why we need it**: outputs `<none>` for columns specified by `-o custom-columns` but not found in object currently kubectl outputs an error of "xxx is not found" when a column is not in the returned json (omitted because of empty value or no such field in the object type at all). This PR suppress this error but outputs `<none>` at that field. This makes it convenient to output the objects details, especially when getting objects of different type in one command. example: ``` $ kubectl get deploy,rs,po -o custom-columns=NAMESPACE:.metadata.namespace,NAME:.metadata.name,REPLICAS:.status.replicas NAMESPACE NAME REPLICAS default deck 1 default deck-433074128 1 default deck-433074128-vxcg9 <none> ``` **Special notes for your reviewer**: **Release note**: ```release-note outputs `<none>` for columns specified by `-o custom-columns` but not found in object ``` @kubernetes/kubectl-reviewers |
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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
If you are less impatient, 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.