ELK Sample Install (#37)

Updated Readme.md to include a Sample ELK Install guide addressing multiple issues around ELK Cluster/Node Configuration.

README.md

@@ -43,7 +43,7 @@ Requirements
 *   Vulnerability Scanner
 *   Optional: Message broker such as Kafka or RabbitMQ 
 
-<a id="installreq">Install Requirements (may require sudo)</a>
+<a id="installreq">Install Requirements-VulnWhisperer(may require sudo)</a>
 --------------------
 
 **First, install dependant modules**
@@ -64,6 +64,89 @@ python setup.py install
 
 Now you're ready to pull down scans. (see <a href="#run">run section</a>)
 
+
+Install Requirements-ELK Node **\*SAMPLE\***
+--------------------
+The following instructions should be utilized as a **Sample Guide** in the absence of an existing ELK Cluster/Node. This will cover a Debian example install guide of a stand-alone node of Elasticsearch & Kibana.
+
+While Logstash is included in this install guide, it it recommended that a seperate host pulling the VulnWhisperer data is utilized with Logstash to ship the data to the Elasticsearch node.
+
+*Please note there is a docker-compose.yml available as well.*
+
+**Debian:** *(https://www.elastic.co/guide/en/elasticsearch/reference/5.6/deb.html)*
+```shell
+sudo apt-get install -y default-jre
+wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -
+sudo apt-get install apt-transport-https
+echo "deb https://artifacts.elastic.co/packages/5.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-5.x.list
+sudo apt-get update && sudo apt-get install elasticsearch kibana logstash
+sudo /bin/systemctl daemon-reload
+sudo /bin/systemctl enable elasticsearch.service
+sudo /bin/systemctl enable kibana.service
+sudo /bin/systemctl enable logstash.service
+```
+
+**Elasticsearch & Kibana Sample Config Notes** 
+
+Utilizing your favorite text editor:
+*   Grab your host IP and change the IP of your /etc/elasticsearch/elasticsearch.yml file. (This defaults to 'localhost')
+*   Validate Elasticsearch is set to run on port 9200 (Default)
+*   Grab your host IP and change the IP of your /etc/kibana/kibana.yml file. (This defaults to 'localhost') *Validate that Kibana is pointing to the correct Elasticsearch IP (This was set in the previous step)*
+*   Validate Kibana is set to run on port 5601 (Default)
+
+*Start elasticsearch and validate they are running/communicating with one another:* 
+```shell
+sudo service elasticsearch start
+sudo service kibana start
+```
+OR
+```shell
+sudo systemctl start elasticsearch.service
+sudo systemctl start kibana.service
+```
+
+**Logstash Sample Config Notes**
+
+*   Copy/Move the Logstash .conf files from */VulnWhisperer/logstash/* to */etc/logstash/conf.d/*
+*   Validate the Logstash.conf files *input* contains the correct location of VulnWhisper Scans in the *input.file.path* directory identified below:
+```
+input {
+  file {
+    path => "/opt/vulnwhisperer/nessus/**/*"
+    start_position => "beginning"
+    tags => "nessus"
+    type => "nessus"
+  }
+}
+```
+*   Validate the Logstash.conf files *output* contains the correct Elasticsearch IP set during the previous step above: (This will default to localhost)
+```
+output {
+  if "nessus" in [tags] or [type] == "nessus" {
+    #stdout { codec => rubydebug }
+    elasticsearch {
+      hosts => [ "localhost:9200" ]
+      index => "logstash-vulnwhisperer-%{+YYYY.MM}"
+    }
+  }
+```
+*   Validate logstash has the correct file permissions to read the location of the VulnWhisperer Scans
+
+Once configured run Logstash: (Running Logstash as a service will pick up all the files in */etc/logstash/conf.d/* If you would like to run only one logstash file please reference the command below):
+
+Logstash as a service:
+```shell
+sudo service logstash start
+```
+*OR*
+```shell
+sudo systemctl start logstash.service
+```
+Single Logstash file:
+```shell
+sudo /usr/share/logstash/bin/logstash --path.settings /etc/logstash/ -f /etc/logstash/conf.d/1000_nessus_process_file.conf
+```
+
 Configuration
 -----