For communication inside a cluster, pods use services. Usually, that needs to define internal endpoints with service URL format.
NB: It is important to set up namespace part correctly.
If not, requests can come to unexpected service, which will cause errors.
Fully qualified endpoint format is:
http://<service-name>.<namespace>.svc.<cluster>:<service-port>Where
<service-name>.<namespace>.svc.<cluster>- hostname of service<service-port>- port of service
For example:
- hostname is
elasticsearch-master.elastic.svc.cluster.local - service port is
9200 - final URL is
http://elasticsearch-master.elastic.svc.cluster.local:9200
If pods run in the same namespace and cluster, it can be simplified to:
http://<service-name>:<service-port>For example: http://elasticsearch-master:9200