52cc96d5a0
Automatic merge from submit-queue AWS: ELB proxy protocol support via annotation service.beta.kubernetes.io/aws-load-balancer-proxy-protocol This is a ~~work in progress~~ branch that adds support for the Proxy Protocol with Elastic Load Balancers. The proxy protocol is documented here: http://www.haproxy.org/download/1.5/doc/proxy-protocol.txt. It allows us to pass the "real ip" address of a client to pods behind services. As it stands now, we create an ELB policy on the load balancer that enables the proxy protocol. We then enumerate each node port assigned to the load balancer and add our newly created policy to it. The manual process is documented here: http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/enable-proxy-protocol.html Right now, I’m looking to get some feedback on the approach before I dive too much deeper in the code. More precisely, I have questions regarding the following: 1) Right now I just check that a certain annotation exists on the service regardless of what its value is. Assuming we’re going to enable this feature via an annotation, what is the expected experience? This decision likely depends on the answers to the next questions. 2) Right now the implementation enables the proxy protocol on every ELB backend. The actual ELB API expects you to add the policy for each configured backend. Do we want the ability to configure the proxy protocol on a per service port basis? For example, if a service exposes TCP 80 and 443, would we want the ability to only enable the proxy protocol on port 443? Does this overcomplicate the implementation? If we wanted to go this direction we could do something like ... ``` { "service.beta.kubernetes.io/aws-load-balancer-proxy-protocol": "tcp:80,tcp:443" } ``` 3) I avoided this because I was concerned with scope creep and our organization doesn’t need it, but could/should our implementation be adjusted to just handle ELB policies in general? I hadn’t used the ELB API until I started working on this branch so I don’t know how realistic this is. I also don't know how common this use case is as our organization has used our own load balancing setup prior to Kubernetes. This page has a couple of examples at the bottom: http://docs.aws.amazon.com/cli/latest/reference/elb/create-load-balancer-policy.html cc @justinsb <!-- Reviewable:start --> --- This change is [<img src="http://reviewable.k8s.io/review_button.svg" height="35" align="absmiddle" alt="Reviewable"/>](http://reviewable.k8s.io/reviews/kubernetes/kubernetes/24569) <!-- Reviewable:end -->
Kubernetes
Are you ...
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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
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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.
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With the 1.0.1 release Kubernetes is ready to serve your production workloads.
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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.
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Kubernetes works with the following concepts:
- Cluster
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Kubernetes documentation is organized into several categories.
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- 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
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- see also notes on the API
- see also the API object documentation, a detailed description of all fields found in the core API objects
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You should consider joining the Cloud Native Computing Foundation. For details about who's involved and how Kubernetes plays a role, read their announcement.
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