# Does multinode cluster require different certificates or just one will suffice?

**URL:** <https://discuss.elastic.co/t/does-multinode-cluster-require-different-certificates-or-just-one-will-suffice/328963>\
**Category:** Elasticsearch\
**Tags:** elastic-stack-security, docker\
**Created:** [March 30, 2023, 5:00pm UTC](https://discuss.elastic.co/t/does-multinode-cluster-require-different-certificates-or-just-one-will-suffice/328963 "2023-03-30T17:00:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Umang\_Pachaury](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/umang_pachaury/32/113523_2.png) [@Umang\_Pachaury](https://discuss.elastic.co/u/Umang_Pachaury)\
**Post date:** [March 30, 2023, 5:00pm UTC](https://discuss.elastic.co/t/does-multinode-cluster-require-different-certificates-or-just-one-will-suffice/328963/1 "2023-03-30T17:00:01Z")

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Hey team,  
I have a multi node cluster running which has a hot warm architecture. I have multiple hot nodes running on a single machine as docker images and multiple warm nodes running on another machine(this is also a single machine) as docker images. Like this I have multiple machines running multiple docker images. Now I am thinking of implementing elastic security on the cluster. My question is that will all these nodes require their own certificate or I just get one certificate and that single certificate will work for all those nodes. What I am trying to say is that suppose I have 10 node cluster running with docker on 2 machines, 5 nodes running as docker images on 1 machine and other 5 nodes on another machine, Now if I enable security do I have to have 10 certificates for all the 10 nodes or a single certificate will work for all the 10 nodes and if I have kibana running as a docker image will that single certificate also work there or I need a separate certificate for that.

Regards

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**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:** [March 30, 2023, 11:05pm UTC](https://discuss.elastic.co/t/does-multinode-cluster-require-different-certificates-or-just-one-will-suffice/328963/2 "2023-03-30T23:05:56Z")

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You can have a certificate that applies to multiple nodes, take a look at [Updating node security certificates | Elasticsearch Guide [8.7] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/current/update-node-certs.html)

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [April 27, 2023, 11:06pm UTC](https://discuss.elastic.co/t/does-multinode-cluster-require-different-certificates-or-just-one-will-suffice/328963/3 "2023-04-27T23:06:55Z")

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