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To Perform the following steps to prepare the search servers for Elasticsearch, perform the following steps.

1. Verify

   your

   the servers against the Hardware Requirements for Elasticsearch.

2. Appropriately cable the servers to your network infrastructure so

   that, once configured, they will be

   they are reachable from the Swarm nodes.

3. Install RHEL/CentOS 7 Linux and apply any required updates.

   For

   Contact DataCore Support for questions about enabling or disabling IPv6

   , contact Support

   .

   Info
   title Best practice
   Use RHEL/CentOS Minimal Server (with Compatibility Libraries), which is the standard for Swarm development and testing. RHEL/CentOS Desktop consumes extra resources that Elasticsearch can use, alters the OS configuration to emphasize user interface vs. server performance, and requires additional updating and security maintenance.

4. Configure the servers with static IP addresses.

5. Configure DNS, if desired.

6. Adjust the server firewall rules. See https://firewalld.org.
   

   If on CentOS 7 you install and run iptables, you must adjust

   Adjust the rules to permit the following ports if on CentOS 7 install and run iptables:

   • Allow public access on these ports:

     Code Block
     language bash
     firewall-cmd --permanent --zone=public --add-port=9200/tcp firewall-cmd --permanent --zone=public --add-port=9300/tcp firewall-cmd --reload

   • For SwarmFS access, search

     Search the Support portal for SwarmNFS 2.x - Access to Elasticsearch (IPTables) for SwarmFS access.

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Remove OpenJDK Package

yum remove java-1.8.0-openjdk