The java one is interesting, but its also a separate repo from the main
grpc one that has the C++ and subsequently node.js LB stuff that I can't
figure out. For example maybe I'm missing it, but while this Java code
makes sense to me:
public HelloWorldClient(String zkAddr) {
this(ManagedChannelBuilder.forTarget(zkAddr)
.loadBalancerFactory(RoundRobinLoadBalancerFactory.getInstance())
.nameResolverFactory(new ZkNameResolverProvider())
.usePlaintext(true));
}
It doesn't help me reconcile how to inject an LB into this node.js code:
new example.RouteGuide('localhost:50051', grpc.credentials.createInsecure());
I.e. there's no managed channel builder in node.js (that I can find) and
the arguments to that constructor are the addr, ssl, and options, of which
there is no definitively list of things I can send that I can tell.
Thanks,
\Peter
On Monday, June 12, 2017 at 10:36:57 AM UTC-6, Makarand Dharmapurikar wrote:
>
> Hi - Another simpler load balancing example is here -
> https://github.com/makdharma/grpc-zookeeper-lb
>
> On Thu, Jun 8, 2017 at 4:05 PM, <[email protected] <javascript:>>
> wrote:
>
>> The golang code is straightforward and somewhat documented so I actually
>> have that part working just fine. I'm specifically looking for how to do
>> that with node.js (or at least C++ as node.js is using that under the
>> covers); I can't find any examples and the docs are about broad concepts
>> but no information on how to actually pass those around to the node.js
>> classes.
>>
>> Thanks,
>> \Peter
>>
>>
>> On Wednesday, June 7, 2017 at 10:17:14 PM UTC-6, Nice Robot wrote:
>>>
>>> Is this what you want :
>>> https://github.com/bsm/grpclb/blob/master/cmd/grpc-lb-client/main.go
>>>
>>> On Sunday, May 21, 2017 at 9:44:37 PM UTC-7, [email protected]
>>> wrote:
>>>>
>>>> Hi,
>>>>
>>>> Sorry to resurrect a somewhat old thread but it seemed the most logical
>>>> place to ask this question: are there samples of setting up a client to
>>>> use
>>>> LB in various languages, specifically node.js? I believe its supported,
>>>> but
>>>> I can't figure out where I'm supposed to even start out at. It'd be nice
>>>> to
>>>> see a client that uses a naming resolver and load balancer, and perhaps a
>>>> sample of writing one's own naming resolver and load balancer.
>>>>
>>>> Thanks,
>>>> \Peter
>>>>
>>>> On Tuesday, August 9, 2016 at 7:19:54 PM UTC-6, Louis Ryan wrote:
>>>>>
>>>>>
>>>>>
>>>>> On Tue, Aug 9, 2016 at 5:58 PM, Pradeep Singh <[email protected]>
>>>>> wrote:
>>>>>
>>>>>> If I take this example with any Service Discovery solution out there,
>>>>>> this is what I understand.
>>>>>>
>>>>>> 1. I get list of IPs for a Service A via Service Discovery Agent.
>>>>>> 2. I connect to all of them via gRPC channels.
>>>>>> 3. Who load balances now when I send a message??? Client?
>>>>>> Or do I connect to all IPs via same channel handle?(Just like zmq)
>>>>>>
>>>>>
>>>>> It varies a little by implementation but generally you just implement
>>>>> the name-resolution part. E.g. in Java
>>>>>
>>>>>
>>>>> https://github.com/grpc/grpc-java/blob/56a2938830eb2c00f4f010318bdc56ca3af7263d/core/src/main/java/io/grpc/internal/DnsNameResolver.java
>>>>>
>>>>> and GRPC channels will use the resolved IPs under the hood. I guess
>>>>> this is similar to what zmq does
>>>>>
>>>>>
>>>>>>
>>>>>> If I have to write my own client side load balancing on my own, it
>>>>>> kind of makes it cumbersome I guess.
>>>>>>
>>>>>> Thanks,
>>>>>> --Pradeep
>>>>>>
>>>>>>
>>>>>> On Tue, Aug 9, 2016 at 5:33 PM, Louis Ryan <[email protected]> wrote:
>>>>>>
>>>>>>> First take a look at
>>>>>>>
>>>>>>> https://github.com/grpc/grpc/blob/master/doc/load-balancing.md
>>>>>>>
>>>>>>> GRPC also supports the ability to plug-in your service discovery
>>>>>>> mechanism of choice which can then be used for client-side
>>>>>>> load-balancing.
>>>>>>>
>>>>>>> On Tue, Aug 9, 2016 at 10:51 AM, <[email protected]> wrote:
>>>>>>>
>>>>>>>> Hi
>>>>>>>>
>>>>>>>> While going through gRPC goals on grpc.io I noticed it mentions
>>>>>>>> Load balancing as one of its design principles or Goals.
>>>>>>>>
>>>>>>>> But I did not find anything which suggests the same.
>>>>>>>>
>>>>>>>> Saw one of the gRPC Demos by Sameer Ajmani on Youtube and he
>>>>>>>> appears to be running some kind of a Server Proxy(some yaml file
>>>>>>>> suggested
>>>>>>>> this).I may be wrong.
>>>>>>>>
>>>>>>>> So, my question is how is this Load Balancing goal achieved by gRPC
>>>>>>>> if I have to use a TCP or HTTP Load balancer Proxy to achieve this?
>>>>>>>>
>>>>>>>> As I understands gRPC server stubs need to run on each and every
>>>>>>>> System providing the Service(s), but what does client need to do if
>>>>>>>> Servers
>>>>>>>> are not behind a Proxy?
>>>>>>>>
>>>>>>>> As I understand gRPC does not have a Service Discovery mechanism,
>>>>>>>> hence the confusion.
>>>>>>>>
>>>>>>>> Could someone please point me to the right direction?
>>>>>>>>
>>>>>>>> PS:- I am a newbie to gRPC, pardon my ignorance. Would appreciate
>>>>>>>> if someone can CMIIW.
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>>
>>>>>>>> --
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>>>>>>>> https://groups.google.com/d/msgid/grpc-io/78cb7ddc-282a-4df2-8e0b-5d60cbd7df71%40googlegroups.com
>>>>>>>>
>>>>>>>> <https://groups.google.com/d/msgid/grpc-io/78cb7ddc-282a-4df2-8e0b-5d60cbd7df71%40googlegroups.com?utm_medium=email&utm_source=footer>
>>>>>>>> .
>>>>>>>> For more options, visit https://groups.google.com/d/optout.
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Pradeep Singh
>>>>>>
>>>>>
>>>>> --
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