CODEWITHSUNDEEP
kubernetes
Zach
Zach

Reputation: 129

Get kubernetes cluster ip

I am using an external database that requires you to whitelist IPs for use, and I want a particular service in my k8s cluster to have access to this database.

I don't know which IP address to add to the whitelist. I tried whitelisting the IP field from kubectl describe svc <service_name>. That did not appear to work, so I then tried whitelisting the IP field from kubectl describe pod <pod_name>, which also didn't work.

Ideally I would be able to whitelist the IP from the service instead of the pod, as the pod IP is not static.

Upvotes: 1

Views: 1845

Answers (2)

e-nouri
e-nouri

Reputation: 2626

You cannot whitelist the service IP because there is a sorta of NAT that is connecting pods to pods and containers to containers etc (using etcd). But you can whitelist your global IP, which means you will have access to the database from every pod or service.

Read more about the network here

Upvotes: 2

Jordan Liggitt
Jordan Liggitt

Reputation: 18111

Services only route incoming traffic. Whitelisting a service IP for outgoing traffic doesn't make sense given that architecture. There is also not a 1:many correspondence between services and pods... multiple services could "select" (route to) the same pod.

The IP address for outgoing network traffic from pods ultimately depends on the network setup of the nodes the pods are running on.

Upvotes: 1

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