4cd6d34a0b
iptables-restore did not previously perform any locking, meaning that when callers (like kube-proxy) asked iptables-restore to write large numbers of rules, the iptables-restore process might run in parallel with other 'iptables' invocations in kubelet (hostports), docker, and other software. This causes errors like: "CNI request failed with status 400: 'Failed to ensure that nat chain POSTROUTING jumps to MASQUERADE: error checking rule: exit status 4: iptables: Resource temporarily unavailable." or from Docker "Failed to allocate and map port 1095-1095: iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 1095 -j DNAT --to-destination 10.1.0.2:1095 ! -i lbr0: iptables: Resource temporarily unavailable.\n (exit status 4)" iptables-restore "wait" functionality was added in iptables git commit 999eaa241212d3952ddff39a99d0d55a74e3639e but is NOT YET in a released version of iptables. See also https://bugzilla.redhat.com/show_bug.cgi?id=1417234 |
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| api | ||
| build | ||
| cluster | ||
| cmd | ||
| docs | ||
| examples | ||
| federation | ||
| Godeps | ||
| hack | ||
| hooks | ||
| logo | ||
| pkg | ||
| plugin | ||
| staging | ||
| test | ||
| third_party | ||
| translations | ||
| vendor | ||
| .bazelrc | ||
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| .gitattributes | ||
| .gitignore | ||
| BUILD.bazel | ||
| CHANGELOG.md | ||
| code-of-conduct.md | ||
| CONTRIBUTING.md | ||
| labels.yaml | ||
| LICENSE | ||
| Makefile | ||
| Makefile.generated_files | ||
| OWNERS | ||
| OWNERS_ALIASES | ||
| README.md | ||
| Vagrantfile | ||
| WORKSPACE | ||
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.