# Why doesn't elect master node? **URL:** \ **Category:** Elasticsearch\ **Created:** [April 22, 2020, 6:39am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190 "2020-04-22T06:39:53Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![hgdo](https://avatars.discourse-cdn.com/v4/letter/h/7cd45c/32.png) [@hgdo](https://discuss.elastic.co/u/hgdo)\ **Post date:** [April 22, 2020, 6:39am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190/1 "2020-04-22T06:39:53Z")
Hi. I created a Elasticsearch cluster with 2 servers. Elasticsearch Cluster version is 7.6.2. Each server has three master nodes. I am currently doing a failover test. First, if you kill server 1 that has a master node, the master node is elected from server 2. Second, if you restart server 1 and kill server 2, the master node is not elected from server 1. I want to know why the Masternode is not elected from the second. Thank you. ---
**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:** [April 22, 2020, 6:44am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190/2 "2020-04-22T06:44:18Z")
> [@hgdo](#): > > the master node is not elected from server 1 What node on what server is elected? ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [April 22, 2020, 6:47am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190/3 "2020-04-22T06:47:13Z")
If you have a total of 6 master eligible nodes a strict majority of these (4) need to be available to elect a master. You can therefore not have a highly available cluster with just 2 servers. If any of the servers went down I would expect no master to be elected. If you are seeing anything different you may have some incorrect configuration somewhere or missing a node from your cluster. ---
**Author:** ![hgdo](https://avatars.discourse-cdn.com/v4/letter/h/7cd45c/32.png) [@hgdo](https://discuss.elastic.co/u/hgdo)\ **Post date:** [April 22, 2020, 6:57am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190/5 "2020-04-22T06:57:32Z")
Thank you. To configure a high availability cluster with 2 servers, how do you configure the nodes on each server? ---
**Author:** ![hgdo](https://avatars.discourse-cdn.com/v4/letter/h/7cd45c/32.png) [@hgdo](https://discuss.elastic.co/u/hgdo)\ **Post date:** [April 22, 2020, 6:59am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190/6 "2020-04-22T06:59:49Z")
No master node was elected anywhere. ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [April 22, 2020, 7:20am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190/7 "2020-04-22T07:20:19Z")
You can not do that. A minimum of 3 servers are required. ---
**Author:** ![hgdo](https://avatars.discourse-cdn.com/v4/letter/h/7cd45c/32.png) [@hgdo](https://discuss.elastic.co/u/hgdo)\ **Post date:** [April 22, 2020, 7:33am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190/9 "2020-04-22T07:33:41Z")
The server I said means one os. That is, there are three master nodes in one os. The cluster consists of 2 os (server), each with 3 master nodes. In the same sense (1 server = 1 os), is it correct to say that you need 3 servers? ---
**Author:** ![Christian\_Dahlqvist](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/christian_dahlqvist/32/4617_2.png) [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)\ **Post date:** [April 22, 2020, 7:57am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190/10 "2020-04-22T07:57:40Z")
In order to be able to take down a full host/server you need a minimum of 3. If you take down one out of two servers you lose half the nodes which does not allow a majority to be formed. The third server can however be smaller as it only needs to hold a single small dedicated master node. ---
**Author:** ![hgdo](https://avatars.discourse-cdn.com/v4/letter/h/7cd45c/32.png) [@hgdo](https://discuss.elastic.co/u/hgdo)\ **Post date:** [April 23, 2020, 4:55am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190/11 "2020-04-23T04:55:07Z")
Ok. I understand. I'll try what you said. Thank you! ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 21, 2020, 4:55am UTC](https://discuss.elastic.co/t/why-doesnt-elect-master-node/229190/12 "2020-05-21T04:55:10Z")
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