Envoy as a gRPC lookaside load balancer?

[to...@ulfsparre.se]

Hi,

now with the Envoy v2 HDS it seems like Envoy could also used as a gRPC lookaside load balancer, if it implemented that API.

It would be a nice middle ground to deploying Envoy everywhere in a mesh. 

Is there any plans for that and what is your thoughts around that?

[Harvey Tuch]

The plan is to definitely add this support, but there is no concrete implementation in-flight today. +Anna Berenberg who is driving this.

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[Anna Berenberg]

I would like to go a bit different way. I want grpc LB APIs change (v2) to become Envoy APIs. grpc LB team at Google is working on comparison of both - I believe there should not be any major differences as when I designed EDS, I was looking at gRPC LB APIs. 

if we have grpc LB protocol support v2 Envoy APIs (CDS, EDS), then Envoy would become a control plane proxy/stats aggregator for grpc LB traffic.  

Thoughts?

Anna

On Mon, Sep 11, 2017 at 7:03 AM, Harvey Tuch <ht...@google.com> wrote:

The plan is to definitely add this support, but there is no concrete implementation in-flight today. +Anna Berenberg who is driving this.

On Mon, Sep 11, 2017 at 8:08 AM <to...@ulfsparre.se> wrote:

Hi,

now with the Envoy v2 HDS it seems like Envoy could also used as a gRPC lookaside load balancer, if it implemented that API.

It would be a nice middle ground to deploying Envoy everywhere in a mesh. 

Is there any plans for that and what is your thoughts around that?

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[Matt Klein]

Anna,

I agree it would be optimal if gRPC could support the v2 APIs. I would be happy to sync up with the gRPC team whenever on this.

One thing that I think is important is our combined messaging on when people should use gRPC lookaside LB vs. just using Envoy as the direct LB for the gRPC client. This might even be on a per-RPC basis depending on configuration. It probably depends on perf needs, feature set of the gRPC library in question, etc.

Matt 

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Matt Klein

Software Engineer

mkl...@lyft.com

[Anna Berenberg]

yes sounds good. We will do due diligence in API comparison and will call a meeting 

[manilogic]

Hi

Reviving this old mail thread. Do we have the capability in Envoy to act as a lookaside LB? Please provide any examples indicating API/configurations.

To be clear, what I am looking for is Envoy to provide a service like Get-Suitable-Upstream-Endpoint, which will take a URL/service name as an input parameter, pass that thru a set of configured routes/clusters, apply load balancing to pick an endpoint and return that endpoint details as the output.

Mani

On Tuesday, September 12, 2017 at 1:58:07 AM UTC+5:30 Anna Berenberg wrote:

yes sounds good. We will do due diligence in API comparison and will call a meeting 

On Mon, Sep 11, 2017 at 11:52 AM, Matt Klein <mkl...@lyft.com> wrote:

Anna,

I agree it would be optimal if gRPC could support the v2 APIs. I would be happy to sync up with the gRPC team whenever on this.

One thing that I think is important is our combined messaging on when people should use gRPC lookaside LB vs. just using Envoy as the direct LB for the gRPC client. This might even be on a per-RPC basis depending on configuration. It probably depends on perf needs, feature set of the gRPC library in question, etc.

Matt 

On Mon, Sep 11, 2017 at 8:47 AM, 'Anna Berenberg' via envoy-users <envoy...@googlegroups.com> wrote:

I would like to go a bit different way. I want grpc LB APIs change (v2) to become Envoy APIs. grpc LB team at Google is working on comparison of both - I believe there should not be any major differences as when I designed EDS, I was looking at gRPC LB APIs. 

if we have grpc LB protocol support v2 Envoy APIs (CDS, EDS), then Envoy would become a control plane proxy/stats aggregator for grpc LB traffic.  

Thoughts?

Anna

On Mon, Sep 11, 2017 at 7:03 AM, Harvey Tuch <ht...@google.com> wrote:

The plan is to definitely add this support, but there is no concrete implementation in-flight today. +Anna Berenberg who is driving this.

On Mon, Sep 11, 2017 at 8:08 AM <to...@ulfsparre.se> wrote:

Hi,

now with the Envoy v2 HDS it seems like Envoy could also used as a gRPC lookaside load balancer, if it implemented that API.

It would be a nice middle ground to deploying Envoy everywhere in a mesh. 

Is there any plans for that and what is your thoughts around that?

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[Yan Avlasov]

You can achieve this with a custom HTTP filter that sends local reply with the selected host. You can see router filter obtains the host: https://github.com/envoyproxy/envoy/blob/26797819a34cc4461d8cf2c0019463ab4d04509f/source/common/router/router.cc#L591

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