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Add Java and OS recommendations #62

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Jul 9, 2021
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Add Java and OS recommendations #62

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93409f1
Add Java and OS recommendations
aetter Jun 23, 2021
29feadf
Update compatibility.md
aetter Jun 28, 2021
b812610
Add example version, correct command
aetter Jul 8, 2021
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17 changes: 17 additions & 0 deletions _opensearch/install/compatibility.md
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---
layout: default
title: Compatibility
parent: Install OpenSearch
nav_order: 2
---

# Operating system and JVM compatibility
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- We recommend installing OpenSearch on RHEL- or Debian-based Linux distributions that use [systemd](https://en.wikipedia.org/wiki/Systemd), such as CentOS, Amazon Linux 2, and Ubuntu (LTS). OpenSearch should work on many Linux distributions, but we only test a handful.
- The OpenSearch tarball ships with a compatible version of Java in the `jdk` directory. To find its version, run `./bin/opensearch --version`.
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To use a different Java installation, set the `OPENSEARCH_JAVA_HOME` environment variable to the Java install location. We recommend Java 11 (LTS), but OpenSearch also works with Java 8.
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@aetter aetter Jun 23, 2021 •
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@peterzhuamazon It looks like our gradle build can test on a wide variety of Java versions (8-12 and 14?), but my understanding is that we only want people using the LTS ones for self-installs (8, 11, eventually 17). Again, let me know if I've got it wrong here.


OpenSearch version | Compatible Java versions | Recommended operating systems
:--- | :--- | :---
1.x | 8, 11 | Red Hat Enterprise Linux 7, 8; CentOS 7, 8; Amazon Linux 2; Ubuntu 16.04, 18.04, 20.04
4 changes: 2 additions & 2 deletions _opensearch/install/docker.md
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layout: default
title: Docker
parent: Install OpenSearch
nav_order: 1
nav_order: 3
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# Docker image
Expand All @@ -16,7 +16,7 @@ docker pull opensearchproject/opensearch-dashboards:{{site.opensearch_version}}

To check available versions, see [Docker Hub](https://hub.docker.com/u/opensearchproject).

OpenSearch images use `centos:7` as the base image. If you run Docker locally, we recommend allowing Docker to use at least 4 GB of RAM in **Preferences** > **Resources**.
OpenSearch images use `amazonlinux:2` as the base image. If you run Docker locally, set Docker to use at least 4 GB of RAM in **Preferences** > **Resources**.
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Hey @peterzhuamazon, this change is the result of my sleuthing, but let me know if I got it wrong.



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