# Node Discovery in elasticsearch on amazon EC2 **URL:** \ **Category:** Elasticsearch\ **Created:** [December 7, 2015, 5:39am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490 "2015-12-07T05:39:23Z")\ **Posts on this page:** 18\ **Page:** 1
**Author:** ![siddharth\_gupta](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@siddharth\_gupta](https://discuss.elastic.co/u/siddharth_gupta)\ **Post date:** [December 7, 2015, 5:39am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/1 "2015-12-07T05:39:23Z")
Hello, I was using elastic search 1.7.0 on amzon EC2 and everything was working fine. The nodes were able to discover each other and joined together. But when I switched to elasticsearch 2.1.0 things have been difficult. The nodes are not able to discover each other. Have they made any difference ? Please help me with this issue. Thanks & regards Siddharth ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [December 7, 2015, 6:35am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/2 "2015-12-07T06:35:13Z")
Probably `network.host` not set. ---
**Author:** ![vladmiller](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vladmiller/32/5909_2.png) [@vladmiller](https://discuss.elastic.co/u/vladmiller)\ **Post date:** [December 7, 2015, 7:23am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/3 "2015-12-07T07:23:50Z")
Perhaps there could be few issues. - Make sure your ES nodes listen on correct interface - Make sure your security groups are open and set to allow 9300-9400 traffic between nodes - Use aws-ec2 discovery plugin to discover other nodes Also check error logs to see if there any useful information ---
**Author:** ![siddharth\_gupta](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@siddharth\_gupta](https://discuss.elastic.co/u/siddharth_gupta)\ **Post date:** [December 7, 2015, 11:42am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/4 "2015-12-07T11:42:12Z")
Thanks for your reply! When i set \*\*network.host : _ec2:publicIpv4_ \*\* the publish address is same as the IP of my instance but when I start the nodes it says bound address could not be assigned. Do you know what can be the missing part ? Thanks & regards Siddharth Gupta ---
**Author:** ![siddharth\_gupta](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@siddharth\_gupta](https://discuss.elastic.co/u/siddharth_gupta)\ **Post date:** [December 7, 2015, 11:45am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/5 "2015-12-07T11:45:04Z")
@vladmiller Thanks for the reply. I am sure about the last two points in your reply. Can you please elaborate a little about the first one ? Error logs do not show any useful information. Thanks & Regards Siddharth Gupta. ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [December 7, 2015, 1:47pm UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/6 "2015-12-07T13:47:07Z")
Can you share your logs? ---
**Author:** ![vladmiller](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vladmiller/32/5909_2.png) [@vladmiller](https://discuss.elastic.co/u/vladmiller)\ **Post date:** [December 8, 2015, 3:53am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/7 "2015-12-08T03:53:38Z")
Here is my config. I am using cloud-aws plugin to discover other nodes Sorry, cannot paste it properly here [http://pastebin.com/e8Ert1h7](http://pastebin.com/e8Ert1h7) ---
**Author:** ![siddharth\_gupta](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@siddharth\_gupta](https://discuss.elastic.co/u/siddharth_gupta)\ **Post date:** [December 8, 2015, 9:07am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/8 "2015-12-08T09:07:30Z")
@dadoonet [m] publish\_address {52.23.160.86:9300}, bound\_addresses {127.0.0.1:9300}, {[::1]:9300} where 'm' is the name of my node. publish address is fine but I think there is some problem with bound\_address. Am I right ? When I use network.host: ec2:publicIpv4 it says: Exception in thread "main" BindTransportException[Failed to bind to [9300-9400]]; nested: ChannelException[Failed to bind to: /52.23.160.86:9400]; nested: BindException[Cannot assign requested address]; Likely root cause: java.net.BindException: Cannot assign requested address Can you see something through it ? Thanks & Regards Sidddharth Gupta ---
**Author:** ![siddharth\_gupta](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@siddharth\_gupta](https://discuss.elastic.co/u/siddharth_gupta)\ **Post date:** [December 8, 2015, 9:13am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/9 "2015-12-08T09:13:39Z")
> [@siddharth\_gupta](#): > > [m] publish\_address {52.23.160.86:9300}, bound\_addresses {127.0.0.1:9300}, {[::1]:9300} > > where 'm' is the name of my node. publish address is fine but I think there is some problem with bound\_address. Am I right ? > > When I use network.host: ec2:publicIpv4 it says: > > Exception in thread "main" BindTransportException[Failed to bind to [9300-9400]]; nested: ChannelException[Failed to bind to: /52.23.160.86:9400]; nested: BindException[Cannot assign requested address];Likely root cause: java.net.BindException: Cannot assign requested address > > Can you see something through it ? Thanks & regards Siddharth ---
**Author:** ![siddharth\_gupta](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@siddharth\_gupta](https://discuss.elastic.co/u/siddharth_gupta)\ **Post date:** [December 8, 2015, 9:14am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/10 "2015-12-08T09:14:40Z")
I used the same config on elasticsearch 2.1.0 It is working fine in elasticsearch 1.7.1 ---
**Author:** ![siddharth\_gupta](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@siddharth\_gupta](https://discuss.elastic.co/u/siddharth_gupta)\ **Post date:** [December 8, 2015, 9:19am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/11 "2015-12-08T09:19:27Z")
When I start the other node it says:: [2015-12-08 09:18:16,192][WARN][discovery] [m+d] waited for 30s and no initial state was set by the discovery [2015-12-08 09:18:16,272][INFO][http] [m+d] publish\_address {52.23.160.86:9201}, bound\_addresses {127.0.0.1:9201}, {[::1]:9201} [2015-12-08 09:18:16,274][INFO][node] [m+d] started That means the node has started but the node has not joined the old one. ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [December 8, 2015, 9:22am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/12 "2015-12-08T09:22:49Z")
Your config is wrong for sure. May be share it with us? ---
**Author:** ![siddharth\_gupta](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@siddharth\_gupta](https://discuss.elastic.co/u/siddharth_gupta)\ **Post date:** [December 8, 2015, 10:30am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/15 "2015-12-08T10:30:46Z")
``` cluster.name: my-app node.name: m+d node.data: true node.master: true bootstrap.mlockall: true network.publish_host: _ec2:publicIpv4_ discovery.ec2.host_type: public_dns cloud.aws.access_key: XXXXXXXXXXXXXXXXXXXXXXX cloud.aws.secret_key: XXXXXXXXXXXXXXXXXXXXXXX discovery.zen.ping.timeout: 30s discovery.zen.ping.multicast.enabled: false discovery.type: ec2 discovery.zen.ping.unicast.hosts: ["ec2-52-23-160-86.compute-1.amazonaws.com"] discovery.zen.minimum_master_nodes: 2 http.cors.enabled: true http.cors.allow-origin: "*" ``` ---
**Author:** ![siddharth\_gupta](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@siddharth\_gupta](https://discuss.elastic.co/u/siddharth_gupta)\ **Post date:** [December 8, 2015, 10:31am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/16 "2015-12-08T10:31:41Z")
Above is my elasticsearch.yml Can you point out where I am messing things up Thanks Siddharth ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [December 8, 2015, 5:12pm UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/17 "2015-12-08T17:12:52Z")
I edited your answer to shows only uncommented settings. Some comments: - Set `network.publish_host: _ec2_` - Remove `network.publish_host: _ec2:publicIpv4_` - Remove `discovery.ec2.host_type: public_dns` - Remove `discovery.zen.ping.unicast.hosts: ["ec2-52-23-160-86.compute-1.amazonaws.com"]` - Remove `discovery.zen.ping.multicast.enabled: false` And restart... So basically try `elasticsearch.yml`: ```auto cluster.name: my-app node.name: m+d bootstrap.mlockall: true network.host: _ec2_ cloud.aws.access_key: XXXXXXXXXXXXXXXXXXXXXXX cloud.aws.secret_key: XXXXXXXXXXXXXXXXXXXXXXX discovery.type: ec2 discovery.zen.minimum_master_nodes: 2 ``` Let me know how it goes. ---
**Author:** ![siddharth\_gupta](https://avatars.discourse-cdn.com/v4/letter/s/dec6dc/32.png) [@siddharth\_gupta](https://discuss.elastic.co/u/siddharth_gupta)\ **Post date:** [December 16, 2015, 6:03am UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/18 "2015-12-16T06:03:45Z")
That worked ! Thanks a lot! ---
**Author:** ![Python\_Coder](https://avatars.discourse-cdn.com/v4/letter/p/aeb1de/32.png) [@Python\_Coder](https://discuss.elastic.co/u/Python_Coder)\ **Post date:** [February 20, 2016, 2:47pm UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/19 "2016-02-20T14:47:01Z")
gorgeous 😉 ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 11:14pm UTC](https://discuss.elastic.co/t/node-discovery-in-elasticsearch-on-amazon-ec2/36490/20 "2017-07-05T23:14:44Z")