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Load Balancing an application in Kubernetes

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1

Lets say that I have two deployments which contain two instances of a backend application. (Instead of having one deployment with multiple replicas, as they need to be configured differently).

How would you guys go about load balancing between the two? The classic approach would be to set up HAProxy with the two backends. Does this sound right in the context of Kubernetes? Is there a better way to expose two deployments on a single Ingress Controller resource?

kubernetes load-balancing

share|improve this question

asked Mar 21 at 13:43

NeekoyNeekoy

9941022

add a comment | 

1

Lets say that I have two deployments which contain two instances of a backend application. (Instead of having one deployment with multiple replicas, as they need to be configured differently).

How would you guys go about load balancing between the two? The classic approach would be to set up HAProxy with the two backends. Does this sound right in the context of Kubernetes? Is there a better way to expose two deployments on a single Ingress Controller resource?

kubernetes load-balancing

share|improve this question

asked Mar 21 at 13:43

NeekoyNeekoy

9941022

add a comment | 

Lets say that I have two deployments which contain two instances of a backend application. (Instead of having one deployment with multiple replicas, as they need to be configured differently).

How would you guys go about load balancing between the two? The classic approach would be to set up HAProxy with the two backends. Does this sound right in the context of Kubernetes? Is there a better way to expose two deployments on a single Ingress Controller resource?

kubernetes load-balancing

share|improve this question

asked Mar 21 at 13:43

NeekoyNeekoy

9941022

kubernetes load-balancing

kubernetes load-balancing

share|improve this question

asked Mar 21 at 13:43

NeekoyNeekoy

9941022

share|improve this question

asked Mar 21 at 13:43

NeekoyNeekoy

9941022

asked Mar 21 at 13:43

NeekoyNeekoy

9941022

asked Mar 21 at 13:43

NeekoyNeekoy

9941022

2 Answers
2

active

oldest

votes

2

You can define a Service that will be determined by labels selectors. The requests to the service will be spread across the deployments (as the same with ingress)

Example:

apiVersion: v1
kind: Service
metadata:
 labels:
 app: my-deployments
spec:
 ports:
 - port: 80
 selector:
 app: my-deployments

share|improve this answer

answered Mar 21 at 13:50

AmityoAmityo

1,3491018

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  And will the service load-balance in the sense of Round Robin rotation between the backends?
  
  – Neekoy
  Mar 21 at 13:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  depends on the ingress implementation, but usually yes
  
  – Amityo
  Mar 21 at 13:57
  

  
  
  
  

add a comment | 

1

Ideally you should be running one deployment with multiple replicas. Define the service object selecting the backend pods. The service object automatically load balances the backend pods in round Robin fashion.

If you want to load balance multiple deployment objects then define one service each for deployment, ServiceA and serviceB. You should be running ha-proxy load balancing the traffic between ServiceA and serviceB.

We recommend you opt for first approach unless you have a valid reason to consider second approach

share|improve this answer

edited Mar 21 at 14:35

answered Mar 21 at 14:23

P EkambaramP Ekambaram

1,457718

add a comment | 

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2

You can define a Service that will be determined by labels selectors. The requests to the service will be spread across the deployments (as the same with ingress)

Example:

apiVersion: v1
kind: Service
metadata:
 labels:
 app: my-deployments
spec:
 ports:
 - port: 80
 selector:
 app: my-deployments

share|improve this answer

answered Mar 21 at 13:50

AmityoAmityo

1,3491018

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  And will the service load-balance in the sense of Round Robin rotation between the backends?
  
  – Neekoy
  Mar 21 at 13:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  depends on the ingress implementation, but usually yes
  
  – Amityo
  Mar 21 at 13:57
  

  
  
  
  

add a comment | 

2

You can define a Service that will be determined by labels selectors. The requests to the service will be spread across the deployments (as the same with ingress)

Example:

apiVersion: v1
kind: Service
metadata:
 labels:
 app: my-deployments
spec:
 ports:
 - port: 80
 selector:
 app: my-deployments

share|improve this answer

answered Mar 21 at 13:50

AmityoAmityo

1,3491018

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  And will the service load-balance in the sense of Round Robin rotation between the backends?
  
  – Neekoy
  Mar 21 at 13:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  depends on the ingress implementation, but usually yes
  
  – Amityo
  Mar 21 at 13:57
  

  
  
  
  

add a comment | 

You can define a Service that will be determined by labels selectors. The requests to the service will be spread across the deployments (as the same with ingress)

Example:

apiVersion: v1
kind: Service
metadata:
 labels:
 app: my-deployments
spec:
 ports:
 - port: 80
 selector:
 app: my-deployments

share|improve this answer

answered Mar 21 at 13:50

AmityoAmityo

1,3491018

apiVersion: v1
kind: Service
metadata:
 labels:
 app: my-deployments
spec:
 ports:
 - port: 80
 selector:
 app: my-deployments

share|improve this answer

answered Mar 21 at 13:50

AmityoAmityo

1,3491018

answered Mar 21 at 13:50

AmityoAmityo

1,3491018

answered Mar 21 at 13:50

AmityoAmityo

1,3491018

1

Ideally you should be running one deployment with multiple replicas. Define the service object selecting the backend pods. The service object automatically load balances the backend pods in round Robin fashion.

If you want to load balance multiple deployment objects then define one service each for deployment, ServiceA and serviceB. You should be running ha-proxy load balancing the traffic between ServiceA and serviceB.

We recommend you opt for first approach unless you have a valid reason to consider second approach

share|improve this answer

edited Mar 21 at 14:35

answered Mar 21 at 14:23

P EkambaramP Ekambaram

1,457718

add a comment | 

1

Ideally you should be running one deployment with multiple replicas. Define the service object selecting the backend pods. The service object automatically load balances the backend pods in round Robin fashion.

If you want to load balance multiple deployment objects then define one service each for deployment, ServiceA and serviceB. You should be running ha-proxy load balancing the traffic between ServiceA and serviceB.

We recommend you opt for first approach unless you have a valid reason to consider second approach

share|improve this answer

edited Mar 21 at 14:35

answered Mar 21 at 14:23

P EkambaramP Ekambaram

1,457718

add a comment | 

Ideally you should be running one deployment with multiple replicas. Define the service object selecting the backend pods. The service object automatically load balances the backend pods in round Robin fashion.

If you want to load balance multiple deployment objects then define one service each for deployment, ServiceA and serviceB. You should be running ha-proxy load balancing the traffic between ServiceA and serviceB.

We recommend you opt for first approach unless you have a valid reason to consider second approach

share|improve this answer

edited Mar 21 at 14:35

answered Mar 21 at 14:23

P EkambaramP Ekambaram

1,457718

share|improve this answer

edited Mar 21 at 14:35

answered Mar 21 at 14:23

P EkambaramP Ekambaram

1,457718

answered Mar 21 at 14:23

P EkambaramP Ekambaram

1,457718

answered Mar 21 at 14:23

P EkambaramP Ekambaram

1,457718