# Node joining docker **URL:** \ **Category:** Elasticsearch\ **Tags:** docker\ **Created:** [December 5, 2020, 5:22pm UTC](https://discuss.elastic.co/t/node-joining-docker/257742 "2020-12-05T17:22:19Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Bonzo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bonzo/32/77793_2.png) [@Bonzo](https://discuss.elastic.co/u/Bonzo)\ **Post date:** [December 5, 2020, 5:22pm UTC](https://discuss.elastic.co/t/node-joining-docker/257742/1 "2020-12-05T17:22:20Z")
Hi I have problem joining a data node to the cluster. I m using docker in 2 separate machines. Both machines can talk to each other. My first docker: -- Master docker run -d --name elastic -p 9200:9200 -p 9300:9300 -e "cluster.name=my-cluster-test" -e"node.name=my-name" -e "node.master=true" -e "node.data=false" -e"network.host=0.0.0.0" -e"network.publish\_host=1.2.3.202" -e"cluster.initial\_master\_nodes=12.3.202" [docker.elastic.co/elasticsearch/elasticsearch:7.9.0](http://docker.elastic.co/elasticsearch/elasticsearch:7.9.0) My second: -- Data working docker run -d --name elastic -p 9200:9200 -p 9300:9300 -e "cluster.name=my-cluster-test" -e "node.master=false" -e "node.data=true" -e "node.name=my-name-2" -e "network.host=0.0.0.0" -e "network.publish\_host=1.2.3.203" -e "discovery.seed\_hosts=1.2.3.202" [docker.elastic.co/elasticsearch/elasticsearch:7.9.0](http://docker.elastic.co/elasticsearch/elasticsearch:7.9.0) The log is telling: ... "node.name": "my-name-2", "message": "master not discovered yet: have discovered [{my-name-2}{Je7lyXm9QI-139Sq-LrrFA}{CEjg2sdCTMuOzDrQf7bqAQ}{1.2.3.203}{1.2.3.203:9300}{dilrt}{ml.machine\_memory=16617246720, xpack.installed=true, transform.node=true, ml.max\_open\_jobs=20}]; discovery will continue using [1.2.3.202:9300] from hosts providers and from last-known cluster state; node term 0, last-accepted version 0 in term 0" } PS: From the data node (inside the container) I can ping the master . ---
**Author:** ![xeraa](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xeraa/32/48181_2.png) [@xeraa](https://discuss.elastic.co/u/xeraa)\ **Post date:** [December 6, 2020, 4:36am UTC](https://discuss.elastic.co/t/node-joining-docker/257742/2 "2020-12-06T04:36:57Z")
1. Please format your code for better readability. 2. `-e"cluster.initial_master_nodes=12.3.202"` seems to miss a dot between 1 and 2. 3. I'm not sure that is the correct `node.name` for your scenario, see the documentation on [cluster.initial\_master\_nodes](https://www.elastic.co/guide/en/elasticsearch/reference/current/important-settings.html#initial_master_nodes). ---
**Author:** ![Bonzo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bonzo/32/77793_2.png) [@Bonzo](https://discuss.elastic.co/u/Bonzo)\ **Post date:** [December 6, 2020, 3:05pm UTC](https://discuss.elastic.co/t/node-joining-docker/257742/3 "2020-12-06T15:05:23Z")
Ah, sorry about that. The missing dot is just typos. I also read the documentation (of course). ---
**Author:** ![Bonzo](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/bonzo/32/77793_2.png) [@Bonzo](https://discuss.elastic.co/u/Bonzo)\ **Post date:** [December 12, 2020, 3:56pm UTC](https://discuss.elastic.co/t/node-joining-docker/257742/4 "2020-12-12T15:56:51Z")
The problem was a local firewall. By running: sudo firewall-cmd --zone=public --add-masquerade --permanent sudo firewall-cmd --reload $ sudo systemctl restart docker Then problem is gone ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [January 9, 2021, 3:57pm UTC](https://discuss.elastic.co/t/node-joining-docker/257742/5 "2021-01-09T15:57:19Z")
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