9587272e1e
Automatic merge from submit-queue (batch tested with PRs 63319, 64248, 64250, 63890, 64233). 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>. Always masquerade node-originating traffic with a service VIP source ip **What this PR does / why we need it**: This is a follow up to make IPVS work on systems without cluster-cidr or masquerade-all. On these systems the best matching network / source IP to reach the service VIP is the service VIP itself - at least for the host network. The workaround is simple: Everything originating on the host (OUTPUT nat chain) with a source IP that is the VIP should be masqueraded. The relevant rule change is the first rule in `KUBE-SERVICES`: ``` Chain KUBE-SERVICES (2 references) pkts bytes target prot opt in out source destination 0 0 KUBE-MARK-MASQ all -- * * 0.0.0.0/0 0.0.0.0/0 match-set KUBE-CLUSTER-IP src,dst 104 6240 KUBE-MARK-MASQ tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp match-set KUBE-NODE-PORT-TCP dst ``` The matching rule could be stricter by matching src(ip),dst(ip),dst(port) but the src ip will only be selected if the VIP should be reached. **Which issue(s) this PR fixes** Fixes #63241 **Special notes for your reviewer**: **Release note**: ```release-note NONE ```
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.