Install DCOS datadog metrics plugin on all dcos nodes (https://github.com/dcos/dcos-metrics/blob/master/docs/quickstart/datadog.md)

installDCOSDataDogMetricsPlugin.sh

#!/bin/bash

# Usage : bash installDCOSDataDogMetricsPlugin.sh <Datadog API KEY>

DDAPI=$1

if [[ -z $DDAPI ]]; then
    echo "[Datadog Plugin] Need datadog API key as parameter."
    echo "[Datadog Plugin] Usage : bash installDCOSDataDogMetricsPlugin.sh <Datadog API KEY>."
fi
tmpScriptMaster=$(mktemp "/tmp/installDatadogPlugin-XXXXXXXX")
tmpScriptAgent=$(mktemp "/tmp/installDatadogPlugin-XXXXXXXX")

declare agent=$tmpScriptAgent
declare master=$tmpScriptMaster

for role in "agent" "master"
do
cat <<EOF > ${!role}
curl -s -o /opt/mesosphere/bin/dcos-metrics-datadog -L https://downloads.mesosphere.io/dcos-metrics/plugins/datadog
chmod +x /opt/mesosphere/bin/dcos-metrics-datadog
echo "[Datadog Plugin] Downloaded dcos datadog metrics plugin."

export DD_API_KEY=$DDAPI
export AGENT_ROLE=$role

sudo curl -s -o /etc/systemd/system/dcos-metrics-datadog.service https://downloads.mesosphere.io/dcos-metrics/plugins/datadog.service
echo "[Datadog Plugin] Downloaded dcos-metrics-datadog.service."
sudo sed -i "s/--dcos-role master/--dcos-role \$AGENT_ROLE/g;s/--datadog-key .*/--datadog-key \$DD_API_KEY/g" /etc/systemd/system/dcos-metrics-datadog.service
echo "[Datadog Plugin] Updated dcos-metrics-datadog.service with DD API Key and agent role."
sudo systemctl daemon-reload
sudo systemctl start dcos-metrics-datadog.service
echo "[Datadog Plugin] dcos-metrics-datadog.service is started !"
servStatus=\$(sudo systemctl is-failed dcos-metrics-datadog.service)
echo "[Datadog Plugin] dcos-metrics-datadog.service status : \${servStatus}"
#sudo systemctl status dcos-metrics-datadog.service | head -3
#sudo journalctl -u dcos-metrics-datadog
EOF
done

echo "[Datadog Plugin] Temp script for master saved at : $tmpScriptMaster"
echo "[Datadog Plugin] Temp script for agent saved at : $tmpScriptAgent"

for i in `dcos node | egrep -v "TYPE|master" | awk '{print $1}'` 
do 
    echo -e "\n###> Node - $i"
    dcos node ssh --option LogLevel=quiet --option StrictHostKeyChecking=no --master-proxy --private-ip=$i < $tmpScriptAgent
    echo -e "======================================================="
done

for i in `dcos node | egrep -v "TYPE|agent" | awk '{print $2}'` 
do 
    echo -e "\n###> Master Node - $i"
    dcos node ssh --option LogLevel=quiet --option StrictHostKeyChecking=no --master-proxy --private-ip=$i < $tmpScriptMaster
    echo -e "======================================================="
done

# Check status of dcos-metrics-datadog.service on all nodes.
#for i in `dcos node | egrep -v "TYPE|master" | awk '{print $1}'` ; do  echo -e "\n###> $i"; dcos node ssh --option StrictHostKeyChecking=no --option LogLevel=quiet --master-proxy --private-ip=$i "sudo systemctl is-failed dcos-metrics-datadog.service"; echo -e "======================================\n"; done