# Cluster node discovery failed
**URL:** https://discuss.elastic.co/t/cluster-node-discovery-failed/155653
**Category:** Elasticsearch
**Tags:** docker
**Created:** [November 7, 2018, 3:50am UTC](https://discuss.elastic.co/t/cluster-node-discovery-failed/155653 "2018-11-07T03:50:21Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@wujiaxin159](https://discuss.elastic.co/u/wujiaxin159)
#### Post date: [November 7, 2018, 3:50am UTC](https://discuss.elastic.co/t/cluster-node-discovery-failed/155653/1 "2018-11-07T03:50:21Z")
elk version: 6.3.0
Using docker container
Server IP: 9.77.10.27 --\> Docker IP: 172.17.0.2
Server IP: 9.77.10.28 --\> Docker IP: 172.17.0.3
9.77.10.27 config
```
cluster.name: elk
node.name: node-1
network.host: 0.0.0.0
discovery.zen.ping.unicast.hosts: ["9.77.10.27:9300","9.77.10.28:9300"]
discovery.zen.minimum_master_nodes: 1
node.master: true
node.data: true
transport.tcp.port: 9300
```
9.77.10.27 config
```
cluster.name: elk
node.name: node-2
network.host: 0.0.0.0
discovery.zen.ping.unicast.hosts: ["9.77.10.27:9300","9.77.10.28:9300"]
discovery.zen.minimum_master_nodes: 1
node.master: true
node.data: true
transport.tcp.port: 9300
```
After starting, there is only one node in the clusters of monitoring.
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [November 7, 2018, 6:27am UTC](https://discuss.elastic.co/t/cluster-node-discovery-failed/155653/2 "2018-11-07T06:27:53Z")
What are the logs saying? Any kind of firewall that would not expose port 9300?
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [November 7, 2018, 6:36am UTC](https://discuss.elastic.co/t/cluster-node-discovery-failed/155653/3 "2018-11-07T06:36:12Z")
Also what does your docker config file/command look like?
---
### Author:  [@wujiaxin159](https://discuss.elastic.co/u/wujiaxin159)
#### Post date: [November 7, 2018, 6:59am UTC](https://discuss.elastic.co/t/cluster-node-discovery-failed/155653/4 "2018-11-07T06:59:02Z")
Yes, the port is open and can be requested in docker.
---
### Author:  [@wujiaxin159](https://discuss.elastic.co/u/wujiaxin159)
#### Post date: [November 9, 2018, 2:05am UTC](https://discuss.elastic.co/t/cluster-node-discovery-failed/155653/6 "2018-11-09T02:05:27Z")
Docker Bridged mode binding host host IP failed, binding container IP causes cluster discovery failure.Just switch to host mode.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [December 7, 2018, 2:05am UTC](https://discuss.elastic.co/t/cluster-node-discovery-failed/155653/7 "2018-12-07T02:05:31Z")
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