Production-Grade Container Scheduling and Management
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Kubernetes Submit Queue 12b344aa7c Merge pull request #39768 from rkouj/check-path-exists
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Check if path exists before performing unmount

This is part 3 of an effort to check if path exists before performing an unmount operation.
[Part 1](https://github.com/kubernetes/kubernetes/pull/38547) and [part 2](https://github.com/kubernetes/kubernetes/pull/39311) involved auditing the different volume plugins and refactoring their `TearDownAt()s` to use the common util function/or create one if absent.

The ideal way to do this change would involve refactoring of the `TearDownAt()s` of these plugins and make a common util function that checks path. (The plugins involved in this PR use someway of unmounting a bind mount and unmounting a global path, there is also refactoring needed to consolidate disk_manager of fc, rbd and iscsi). A non-goal part of this effort can also involve refactoring all the `SetupAt()s`

In the interest of time and considering other higher priority issues that I am caught up with, I am unable to give the time the refactoring needs. Hence I've made the minimum change that would give the desired output.

I am tracking the work pending in this issue: https://github.com/kubernetes/kubernetes/issues/39251

```release-note
NONE
```
2017-01-11 20:57:45 -08:00
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Kubernetes

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Introduction

Kubernetes is an open source system for managing containerized applications across multiple hosts, providing basic mechanisms for deployment, maintenance, and scaling of applications. Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF)

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.


Are you ...

Code of Conduct

The Kubernetes community abides by the CNCF code of conduct. Here is an excerpt:

As contributors and maintainers of this project, and in the interest of fostering an open and welcoming community, we pledge to respect all people who contribute through reporting issues, posting feature requests, updating documentation, submitting pull requests or patches, and other activities.

Community

Do you want to help "shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented? ". If you are a company, you should consider joining the CNCF. For details about who's involved in CNCF and how Kubernetes plays a role, read the announcement. For general information about our community see the website community page.

Join us on social media (Twitter, Google+) and read our blog

Ask questions and help answer them on Slack or Stack Overflow

Attend our key events (kubecon, cloudnativecon, weekly community meeting)

Join a Special Interest Group (SIG)

Contribute

If you're interested in being a contributor and want to get involved in developing Kubernetes, get started with this reading:

You will then most certainly gain a lot from joining a SIG, attending the regular hangouts as well as the community meeting.

If you have an idea for a new feature, see the Kubernetes Features repository for a list of features that are coming in new releases as well as details on how to propose one.

Building Kubernetes for the impatient

If you want to build Kubernetes right away there are two options:

$ go get -d k8s.io/kubernetes
$ cd $GOPATH/src/k8s.io/kubernetes
$ make
$ git clone https://github.com/kubernetes/kubernetes
$ cd kubernetes
$ make quick-release

If you are less impatient, head over to the developer's documentation.

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