# Elastic can't connect remote cluster

**URL:** <https://discuss.elastic.co/t/elastic-cant-connect-remote-cluster/283003>\
**Category:** Elasticsearch\
**Tags:** ccs-cross-cluster-search\
**Created:** [September 1, 2021, 7:45am UTC](https://discuss.elastic.co/t/elastic-cant-connect-remote-cluster/283003 "2021-09-01T07:45:49Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![lisiyu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lisiyu/32/91545_2.png) [@lisiyu](https://discuss.elastic.co/u/lisiyu)\
**Post date:** [September 1, 2021, 7:45am UTC](https://discuss.elastic.co/t/elastic-cant-connect-remote-cluster/283003/1 "2021-09-01T07:45:49Z")

</div>

Verison

```auto
elasticsearch: 7.13.1

```

cluster-one and cluster-two have same config.

```auto
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: elasticsearch
  labels:
    app: elasticsearch
spec:
  selector:
    matchLabels:
      app: elasticsearch
  serviceName: "elasticsearch"
  replicas: 1
  template:
    metadata:
      labels:
        app: elasticsearch
    spec:
      terminationGracePeriodSeconds: 10
      containers:
      - name: elasticsearch
        image: elasticsearch:7.13.1
        ports:
        - containerPort: 9200
          name: es-cli
        - containerPort: 9300
          name: es-iner
        env:
        - name: discovery.type
          value: single-node

```

The Use the cluster update settings API to dynamically configure remote settings on every node in the cluster-two.The remote seeds is `cluster-one:9300`

```auto
PUT _cluster/settings
{
  "persistent": {
    "cluster": {
      "remote": {
        "eks1": {
          "seeds": [
            "cluster-one:9300"
          ]
        }
      }
    }
  }
}

```

But `GET _remote/info`,is show

```auto
{
  "eks1" : {
    "connected" : false,
    "mode" : "sniff",
    "seeds" : [
      "cluster-one:9300"
    ],
    "num_nodes_connected" : 0,
    "max_connections_per_cluster" : 3,
    "initial_connect_timeout" : "30s",
    "skip_unavailable" : false
  }
}

```

I try to connect `cluster-one:9300` on cluster-two node. Return `This is not an HTTP`  
The cluster-one logs :

```auto
{"type": "server", "timestamp": "2021-09-01T07:20:21,021Z", "level": "INFO", "component": "o.e.c.s.ClusterSettings", "cluster.name": "cluster-two", "node.name": "elasticsearch-0", "message": "updating [cluster.remote.eks1.seeds] from [[]] to [[\"cluster-one:9300\"]]", "cluster.uuid": "NHNbWruqQmGJ7Y7yl8Kg7A", "node.id": "TNLCNX_sRFCRbIHJIUXutg" }
{"type": "server", "timestamp": "2021-09-01T07:20:31,038Z", "level": "WARN", "component": "o.e.t.RemoteClusterService", "cluster.name": "cluster-two", "node.name": "elasticsearch-0", "message": "failed to connect to new remote cluster eks1 within 10s", "cluster.uuid": "NHNbWruqQmGJ7Y7yl8Kg7A", "node.id": "TNLCNX_sRFCRbIHJIUXutg" }
{"type": "server", "timestamp": "2021-09-01T07:20:51,108Z", "level": "WARN", "component": "o.e.t.SniffConnectionStrategy", "cluster.name": "cluster-two", "node.name": "elasticsearch-0", "message": "fetching nodes from external cluster [eks1] failed", "cluster.uuid": "NHNbWruqQmGJ7Y7yl8Kg7A", "node.id": "TNLCNX_sRFCRbIHJIUXutg" ,
"stacktrace": ["org.elasticsearch.transport.ConnectTransportException: [elasticsearch-0][xxxxxx:9300] connect_timeout[30s]",
"at org.elasticsearch.transport.TcpTransport$ChannelsConnectedListener.onTimeout(TcpTransport.java:977) ~[elasticsearch-7.13.1.jar:7.13.1]",
"at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:673) ~[elasticsearch-7.13.1.jar:7.13.1]",
"at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) [?:?]",
"at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) [?:?]",
"at java.lang.Thread.run(Thread.java:831) [?:?]"] }

```

I don't know what is the wrong.How to fix it?

---

<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [September 1, 2021, 10:22pm UTC](https://discuss.elastic.co/t/elastic-cant-connect-remote-cluster/283003/2 "2021-09-01T22:22:36Z")

</div>

Just so I am following here, are you setting up CCS or CCR here?

---

<div class="post-metadata">

**Author:** ![lisiyu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lisiyu/32/91545_2.png) [@lisiyu](https://discuss.elastic.co/u/lisiyu)\
**Post date:** [September 2, 2021, 2:20am UTC](https://discuss.elastic.co/t/elastic-cant-connect-remote-cluster/283003/3 "2021-09-02T02:20:17Z")

</div>

> [@warkolm](#):
>
> CCS

```auto
PUT _cluster/settings
{
  "persistent": {
    "cluster": {
      "remote": {
        "eks1": {
          "seeds": [
            "cluster-one:9300"
          ]
        }
      }
    }
  }
}

```

s there a problem with my understanding 🤣? This step is setting up CCS

---

<div class="post-metadata">

**Author:** ![lisiyu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lisiyu/32/91545_2.png) [@lisiyu](https://discuss.elastic.co/u/lisiyu)\
**Post date:** [September 2, 2021, 2:41am UTC](https://discuss.elastic.co/t/elastic-cant-connect-remote-cluster/283003/4 "2021-09-02T02:41:47Z")

</div>

> [@warkolm](#):
>
> setting up CCS

kibana setting remote cluster

 ![image](https://us1.discourse-cdn.com/elastic/original/3X/2/8/28eb813759bb22a6108adfdfa1cbb31302824a7e.jpeg)

The remote cluster is single-node, I setup the `transport.tcp.port=9300`

```auto
  containers:
      - name: elasticsearch
        image: elasticsearch:7.13.1
        ports:
        - containerPort: 9200
          name: es-cli
        - containerPort: 9300
          name: es-iner
        env:
        - name: discovery.type
          value: single-node
        - name: cluster.name
          value: eks1
        - name: transport.tcp.port
          value: '9300'

```

---

<div class="post-metadata">

**Author:** ![lisiyu](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/lisiyu/32/91545_2.png) [@lisiyu](https://discuss.elastic.co/u/lisiyu)\
**Post date:** [September 8, 2021, 8:47am UTC](https://discuss.elastic.co/t/elastic-cant-connect-remote-cluster/283003/5 "2021-09-08T08:47:09Z")

</div>

I fix it. Because Elastic is created in a different K8S cluster, it cannot be resolved to a specific ES address through SVC, so it is always disconnected

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [October 6, 2021, 8:47am UTC](https://discuss.elastic.co/t/elastic-cant-connect-remote-cluster/283003/6 "2021-10-06T08:47:13Z")

</div>

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