9be1191aba
Automatic merge from submit-queue Implement CanMount() for gfsMounter for linux **What this PR does / why we need it**: To implement CanMount() check for glusterfs. If mount binaries are not present on the underlying node, the mount will not proceed and return an error message stating so. Related to issue : https://github.com/kubernetes/kubernetes/issues/36098 Related to similar change for NFS : https://github.com/kubernetes/kubernetes/pull/36280 **Release note**: `Check binaries for GlusterFS on the underlying node before doing mount` Sample output from testing in GCE/GCI: rkouj@rkouj0:~/go/src/k8s.io/kubernetes$ kubectl describe pods Name: glusterfs Namespace: default Node: e2e-test-rkouj-minion-group-kjq3/10.240.0.3 Start Time: Fri, 11 Nov 2016 17:22:04 -0800 Labels: <none> Status: Pending IP: Controllers: <none> Containers: glusterfs: Container ID: Image: gcr.io/google_containers/busybox Image ID: Port: QoS Tier: cpu: Burstable memory: BestEffort Requests: cpu: 100m State: Waiting Reason: ContainerCreating Ready: False Restart Count: 0 Environment Variables: Conditions: Type Status Initialized True Ready False PodScheduled True Volumes: glusterfs: Type: Glusterfs (a Glusterfs mount on the host that shares a pod's lifetime) EndpointsName: glusterfs-cluster Path: kube_vol ReadOnly: true default-token-2zcao: Type: Secret (a volume populated by a Secret) SecretName: default-token-2zcao Events: FirstSeen LastSeen Count From SubobjectPath Type Reason Message --------- -------- ----- ---- ------------- -------- ------ ------- 8s 8s 1 {default-scheduler } Normal Scheduled Successfully assigned glusterfs to e2e-test-rkouj-minion-group-kjq3 7s 4s 4 {kubelet e2e-test-rkouj-minion-group-kjq3} Warning FailedMount Unable to mount volume kubernetes.io/glusterfs/6bb04587-a876-11e6-a712-42010af00002-glusterfs (spec.Name: glusterfs) on pod glusterfs (UID: 6bb04587-a876-11e6-a712-42010af00002). Verify that your node machine has the required components before attempting to mount this volume type. Required binary /sbin/mount.glusterfs is missing |
||
|---|---|---|
| .github | ||
| api | ||
| build-tools | ||
| cluster | ||
| cmd | ||
| contrib | ||
| docs | ||
| examples | ||
| federation | ||
| Godeps | ||
| hack | ||
| hooks | ||
| logo | ||
| pkg | ||
| plugin | ||
| staging | ||
| test | ||
| third_party | ||
| vendor | ||
| www | ||
| .generated_docs | ||
| .gitattributes | ||
| .gitignore | ||
| BUILD | ||
| CHANGELOG.md | ||
| code-of-conduct.md | ||
| CONTRIB.md | ||
| CONTRIBUTING.md | ||
| DESIGN.md | ||
| labels.yaml | ||
| LICENSE | ||
| Makefile | ||
| Makefile.generated_files | ||
| OWNERS | ||
| OWNERS_ALIASES | ||
| README.md | ||
| Vagrantfile | ||
| WORKSPACE | ||
Kubernetes
Are you ...
- Interested in learning more about using Kubernetes? Please see our user-facing documentation on kubernetes.io or try the Scalable Microservices with Kubernetes course
- Interested in hacking on the core Kubernetes code base? Keep reading!
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:
- lean: lightweight, simple, accessible
- portable: public, private, hybrid, multi cloud
- extensible: modular, pluggable, hookable, composable
- self-healing: auto-placement, auto-restart, auto-replication
Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale, combined with best-of-breed ideas and practices from the community.
Kubernetes is ready for Production!
Since the Kubernetes 1.0 release in July 2015 Kubernetes is ready for your production workloads.
Kubernetes can run anywhere!
You can run Kubernetes on your local workstation under Vagrant, cloud providers (e.g. GCE, AWS, Azure), and physical hardware. Essentially, anywhere Linux runs you can run Kubernetes. Checkout the Getting Started Guides for details.
Concepts
Kubernetes works with the following concepts:
- Cluster
- A cluster is a set of physical or virtual machines and other infrastructure resources used by Kubernetes to run your applications. Kubernetes can run anywhere! See the Getting Started Guides for instructions for a variety of services.
- Node
- A node is a physical or virtual machine running Kubernetes, onto which pods can be scheduled.
- Pod
- Pods are a colocated group of application containers with shared volumes. They're the smallest deployable units that can be created, scheduled, and managed with Kubernetes. Pods can be created individually, but it's recommended that you use a replication controller even if creating a single pod.
- Replication controller
- Replication controllers manage the lifecycle of pods. They ensure that a specified number of pods are running at any given time, by creating or killing pods as required.
- Service
- Services provide a single, stable name and address for a set of pods. They act as basic load balancers.
- Label
- Labels are used to organize and select groups of objects based on key:value pairs.
Documentation
Kubernetes documentation is organized into several categories.
- Getting started guides
- for people who want to create a Kubernetes cluster
- for people who want to port Kubernetes to a new environment
- User documentation
- for people who want to run programs on an existing Kubernetes cluster
- in the Kubernetes User Guide: Managing Applications Tip: You can also view help documentation out on http://kubernetes.io/docs/.
- the Kubectl Command Line Interface is a detailed reference on
the
kubectlCLI - User FAQ
- Cluster administrator documentation
- for people who want to create a Kubernetes cluster and administer it
- in the Kubernetes Cluster Admin Guide
- Developer and API documentation
- for people who want to write programs that access the Kubernetes API, write plugins or extensions, or modify the core Kubernetes code
- in the Kubernetes Developer Guide
- see also notes on the API
- see also the API object documentation, a detailed description of all fields found in the core API objects
- Walkthroughs and examples
- hands-on introduction and example config files
- in the user guide
- in the docs/examples directory
- Contributions from the Kubernetes community
- in the docs/contrib directory
- Design documentation and design proposals
- for people who want to understand the design of Kubernetes, and feature proposals
- design docs in the Kubernetes Design Overview and the docs/design directory
- proposals in the docs/proposals directory
- Wiki/FAQ
- in the wiki
- troubleshooting information in the troubleshooting guide
Community, discussion, contribution, and support
See which companies are committed to driving quality in Kubernetes on our community page.
Do you want to help "shape the evolution of technologies that are container packaged, dynamically scheduled and microservices oriented?"
You should consider joining the Cloud Native Computing Foundation. For details about who's involved and how Kubernetes plays a role, read their announcement.
Code of conduct
Participation in the Kubernetes community is governed by the Kubernetes Code of Conduct.
Are you ready to add to the discussion?
We have presence on:
You can also view recordings of past events and presentations on our Media page.
For Q&A, our threads are at:
Want to contribute to Kubernetes?
If you're interested in being a contributor and want to get involved in developing Kubernetes, start in the Kubernetes Developer Guide and also review the contributor guidelines.
Or, if you just have an idea for a new feature, see the Kubernetes Features repository for details on how to propose it.
Also, please see our expectations for members of the Kubernetes community.
Support
While there are many different channels that you can use to get ahold of us, you can help make sure that we are efficient in getting you the help that you need.
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. We don't bite!
Community resources
- Awesome-kubernetes - http://ramitsurana.github.io/awesome-kubernetes
You can find more projects, tools and articles related to Kubernetes on the awesome-kubernetes list. Add your project there and help us make it better.
- CoreKube - https://corekube.com:
Instructive & educational resources for the Kubernetes community. By the community.
- Community Documentation
Here you can learn more about the current happenings in the kubernetes community.