Connectivity changes during runtime

[networkservicemesh]

Connectivity changes during runtime

[edwarnicke]

@abhiranjeet Let me make sure I understand your question:

When you say

Lets say I have 9 containers running in a cluster which comprise of a Network Service.

Do you mean you have 9 Pods which are Network Service Clients(NSCs) of a particular Network Service?

or

Do you mean you have 9Pods which are Network Service Endpoints (NSEs) composed together to provide the Network Service?

[abhiranjeet]

Sorry for not being clear about this :

• I mean 9 pods which are NSEs composed together to provide the Network Service.

Thanks

[barby1138]

Hi
Did we have any conclusion here.
I also have question how I can recompose NSEs in runtime without redeployment of existing modules?
Lets take the simple case.
with NSC:
lets say I had NSC1->NSE1 NSC2->NSE2
now I want both NSC1->NSE1 NSC2->NSE1

NSE1 and NSE2 represent same networkservice

thanks

[glazychev-art]

Hi @barby1138 ,
I'm not sure if this is a valid case... A particular NSE implements a certain networkservice. NSC requests the service for its functionality.
If NSE1 and NSE2 represent same networkservice then no difference what to connect to.

[denis-tingaikin]

Hello @barby1138 , @abhiranjeet

Actually it's possible to manage traffic from NSCs to NSEs without re-deploying and change NSC and NSEs . We can do it via Network Service. https://networkservicemesh.io/docs/concepts/architecture/#network-service

Say we have next types of NSES: Green, Blue (for example we have a label color). And we want to connect all our NSC only to Green NSES. For this we could simply do next:

For this option, we could simply update destination_selector in the NetworkService definition.

    - source_selector:
      routes:
        - destination_selector:
            color: Green

After some time, we may decide to change the target endpoint to the Blue then we can update the network service definition

   - source_selector:
     routes:
       - destination_selector:
---           color: Green
+++           color: Blue