Playbook elastic

Configure and tuning Elasticsearch hosts.

Works in theses clusters:

• master.* (for manager cluster)
• data.* (for storage data)
• proxy.* (for forward requests)

Pay attention: This playbook doesnt install elasticsearch or jdk packages AND doesnt reboot ES or host!!
Some configs needs reboot service for works!

Tested:

• CentOS-7.6
• Elasticsearch-6.7.0 (xpack basic)
• jdk1.8 (Oracle)

Learnings

• If you clone VM, remember to delete the path contents /var/lib/elasticsearch/nodes/*

References

• Download elastic-oss: https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.7.0.rpm
• API: https://www.elastic.co/guide/en/elasticsearch/reference/6.7/cluster.html
• Examples:
  • cluster stats: curl -X GET "<host address>:9200/_cluster/stats?human&pretty"
  • cluster pending tasks: curl -X GET "<host address>:9200/_cluster/pending_tasks"

Examples how execute

Check syntax: ansible-playbook -i production microservices.yml --syntax-check
If root user run: ansible-playbook -u root -i production microservices.yml
If sudo run: ansible-playbook -b -i production microservices.yml

Check facts from OS

Run: ansible -u root -k -i "<hostname or address>," -m setup <hostname or address>