This is a setup of an ELK-stack version 6.6 with Filebeat on separate virtual machines. Communication between Logstash and Filebeat servers is secured with ssl_certificates. In this setup the certificate authority is self generated.

CA authority:

$ openssl genrsa -des3 -out files/certs/myCA.key 2048
$ openssl req -x509 -new -nodes -key files/certs/myCA.key -sha256 -days 1825 -out files/certs/myCA.pem

Self signed certificate:

The CN of certificate must match the name of ELK host.

$ openssl genrsa -out files/certs/filebeat.key 2048
$ openssl req -new -key files/certs/filebeat.key -out files/certs/filebeat.csr
$ openssl x509 -req -in files/certs/filebeat.csr -CA files/certs/myCA.pem -CAkey files/certs/myCA.key -CAcreateserial -out files/certs/filebeat.crt -days 1825 -sha256

Vagrantfile needs plugins hostmanager and disksize to be installed:

$ vagrant plugin install vagrant-hostmanager
$ vagrant plugin install vagrant-disksize

Configurations for Vagrantfile are in vagrantfile.yaml. Contains names and ip addresses of the virtual machines

Configurations for ansible setup are in elk.yml. Contains names of hosts which have to mach with vagrantfile.yaml hosts. Index templates arevlocated in roles/elasticsearch/files/templates/*.json. Includes number of shards and replicas.