# CFK Cluster link

**URL:** <https://forum.confluent.io/t/cfk-cluster-link/37258>\
**Category:** Cluster Replication\
**Created:** [16 February 2025 21:23 UTC](https://forum.confluent.io/t/cfk-cluster-link/37258 "2025-02-16T21:23:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![agvsap1](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.confluent.io/agvsap1/32/4942_2.png) [@agvsap1](https://forum.confluent.io/u/agvsap1)\
**Post date:** [16 February 2025 21:23 UTC](https://forum.confluent.io/t/cfk-cluster-link/37258/1 "2025-02-16T21:23:19Z")

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Hi

I have created this ClusterLink, but kafka pods reports this errors en destination cluster:

```auto
[ERROR] 2025-02-16 16:54:05,790 [kafka-admin-client-thread | cluster-link-client-admin-clusterlink-tfn-global-destination-2] org.apache.kafka.clients.NetworkClient initiateReverseConnect - [AdminClient clientId=cluster-link-client-admin-clusterlink-tfn-global-destination-2] Error initiating reverse connection to node localhost:0 (id: -1 rack: null)

```

```auto
kind: ClusterLink
apiVersion: platform.confluent.io/v1beta1
metadata:
name: clusterlink-tfn-global
namespace: kafkades
spec:
configs:
connections.max.idle.ms: "350000"
cluster.link.retry.timeout.ms: "900000"
sourceInitiatedLink:
linkMode: Destination
destinationKafkaCluster:
kafkaRestClassRef:
name: kafkarestclass
namespace: kafkades
sourceKafkaCluster:
authentication:
type: mtls
tls:
enabled: true
secretRef: kafka-tls-secret-kafkaadmin
bootstrapEndpoint: kafkapro.sistemasti.int:443
clusterID: pm9MXZPnTqqhRc7PjV7U8w
kafkaRestClassRef:
name: kafkarestclass
namespace: kafkapro
mirrorTopics:
- name: test
mirrorTopicOptions:
autoCreateTopics:
enabled: true

```

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<div class="post-metadata">

**Author:** ![mansisinha](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.confluent.io/mansisinha/32/4959_2.png) [@mansisinha](https://forum.confluent.io/u/mansisinha)\
**Post date:** [24 February 2025 08:25 UTC](https://forum.confluent.io/t/cfk-cluster-link/37258/2 "2025-02-24T08:25:14Z")

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Hi, There might be a configuration issue, such as a missing or incorrect bootstrap server definition in the cluster link configuration. An error with `localhost:0` suggests that the bootstrap server is not correctly set. You can check the kafka properties file and ensure that the correct bootstrap server is specified.

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<div class="post-metadata">

**Author:** ![agvsap1](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.confluent.io/agvsap1/32/4942_2.png) [@agvsap1](https://forum.confluent.io/u/agvsap1)\
**Post date:** [24 February 2025 13:34 UTC](https://forum.confluent.io/t/cfk-cluster-link/37258/3 "2025-02-24T13:34:43Z")

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Hi

bootstrap server definition in the cluster link configuration is correct. The cluster source is expoxed by openshift route and the bootstrapEndpoint is this route of OpenShift; perhaps the issue is because the reverse connection doesn´t work fine witk openshift route / haproxy balancer.