Load balancer sample using Consul and Least Connection [TCP]

[ks1990cn]

Closes #1811

• 1811

LoadBalancer Sample using Consul and Least Connection type.

I am creating this PR as a handy guide for local setup and running so any contributor can see loadbalancer in action with minimal repeated setup.

I think this can also help me / anyone as always present setup so just quickly go and make required changes to debug any requested changes / bug.

Proposed Changes

• Under Sample folder, created LoadBalancerDemo
• This folder have 3 Services (Instance1, Instance2 - to demo 2 instances & API Gateway).
• When we hit - /hostname of API Gateway, it loadbalancer will come into picture and with least connection method it will return to which instance it is serving request.
• Ocelot.Sample.Loadbalancer.Common for setup of Consul with Instance 1 and instance 2 (Services)

[ks1990cn]

@raman-m Here you go clean PR.

[raman-m]

@ggnaegi Welcome to code review! This PR will be a sample which goes to the samples folder. Currently we have no Load Balancer + Service Discovery coupling, I guess... Seems we have to compare this sample to the old OcelotServiceDiscovery sample too.

[ks1990cn]

@raman-m @ggnaegi are you reviewing it?

[ks1990cn]

When this gonna be merged @raman-m, just asking is there any dates when you do merges?

[raman-m]

@ggnaegi As a Consul service discovery expert, could you review this piece of coding art please? Let me know the results here and in Slack too plz!

[raman-m]

@ks1990cn commented on Dec 2 When this gonna be merged?

After all criteria of Dev Process are met!... See point 5

[ks1990cn]

@raman-m Is it fine now?

I already had same structure just renamed my project files and folder.

Do you guys have any open slack channel or need to have any privilege to be part of it(just closed one)? @raman-m

[ggnaegi]

@raman-m Is it fine now?

I already had same structure just renamed my project files and folder.

Do you guys have any open slack channel or need to have any privilege to be part of it(just closed one)? @raman-m

@ks1990cn Maybe you could provide a docker-compose project. I was away during week-end.

[ks1990cn]

@raman-m Is it fine now? I already had same structure just renamed my project files and folder. Do you guys have any open slack channel or need to have any privilege to be part of it(just closed one)? @raman-m

@ks1990cn Maybe you could provide a docker-compose project. I was away during week-end.

@ggnaegi If I run on Docker-Compose, I need help for that, I am getting error 500 and my all services are working on docker. do you really need docker support for this sample or just running Consul on docker and rest locally will be okay to demo this?

[ks1990cn]

@ggnaegi @raman-m Here you can see I've created docker-compose and running in debugging mode.

I can hit my dowstream services and I am getting 500 error.

I need help here, what I am missing here?

[ggnaegi]

@ggnaegi @raman-m Here you can see I've created docker-compose and running in debugging mode.

I can hit my dowstream services and I am getting 500 error.

I need help here, what I am missing here?

@ks1990cn it's normal, you are using localhost:8500 for your consul instance. You can't use that address for docker containers, it will never work. You should start your consul instance within the same network as the docker containers. So it's easier to start consul like this:

consul-service:
        image: "consul:latest"
        command: consul agent -dev -log-level=warn -ui -client=0.0.0.0
        hostname: consul
        ports:
            - "8500:8500"
            - "8600:8600"

and then call your docker instance with consul:8500

[raman-m]

Wow! So interesting battle I've missed... 😄

[ks1990cn]

Wow! So interesting battle I've missed... 😄

Haha! Need help here🤣 in #1811

[raman-m]

Haha... haha... But closing well reviewed PRs is not good...