Adds newrelic-infra snippet.

More information is available here
https://docs.newrelic.com/docs/infrastructure/new-relic-infrastructure/getting-started/welcome-new-relic-infrastructure

Author: gottfrois

cloud66/newrelic-infra

@@ -0,0 +1,21 @@
+# {{Description: This deploy hook will run the following code snippet to automate the installation of NewRelic, and requires the NEWRELIC_KEY environment variable to be set on a stack.}}
+if [ -z "$NEWRELIC_KEY" ]
+then
+        >&2 echo "Please set your NEWRELIC_KEY environment variable"
+        exit 1
+else
+        if [ -s /etc/apt/sources.list.d/newrelic-infra.list ]
+		then
+        	sudo rm -f /etc/apt/sources.list.d/newrelic-infra.list
+          printf "deb [arch=amd64] https://download.newrelic.com/infrastructure_agent/linux/apt trusty main" | sudo tee -a /etc/apt/sources.list.d/newrelic-infra.list
+		else
+          printf "deb [arch=amd64] https://download.newrelic.com/infrastructure_agent/linux/apt trusty main" | sudo tee -a /etc/apt/sources.list.d/newrelic-infra.list
+		fi
+
+    printf "license_key: %s\n" "$NEWRELIC_KEY" | sudo tee -a /etc/newrelic-infra.yml
+
+		sudo wget -O- https://download.newrelic.com/infrastructure_agent/gpg/newrelic-infra.gpg | sudo apt-key add -
+		sudo apt-get update -y
+		sudo DEBIAN_FRONTEND=noninteractive apt-get -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" install newrelic-infra
+    sudo initctl start newrelic-infra
+fi