A simple node-red based remote command scheduler. The flows can be invoked either through http or can be initiated through an MQTT payload. The flow subscribes to a topic which is the hostname.

Git clone the repo and run the install script as follows.

git clone http://github.com/sajayantony/cmdport
sudo ./cmdport/scripts/install.sh testbroker testuser testpassword

This sets up the flow and connects to the broker and makes the machine ready for remote commands. Refer install.sh for details.
The following commands should be used to setup or remove the agent as needed.

sudo update-rc.d cmdport defaults 
sudo update-rc.d -f cmdport remove

1. Use the following instructions to setup an MQTT broker for command dispatch.

   sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa
   sudo apt-get update
   sudo apt-get -y install mosquitto
   sudo apt-get -y install mosquitto-clients
   

2. Configure the password and disable anonymous access

   sudo mosquitto_passwd -c /etc/mosquitto/pwfile  <username>
   sudo nano /etc/mosquitto/mosquitto.conf
   

3. Add the following

   password_file /etc/mosquitto/pwfile
   allow_anonymous false
   

4. Restart the service

   sudo service mosquitto restart
   

5. To be able to connect to the broker you need to open up the port 1883 for Mosquitto. Follow the bread crumb described below and add port 1883.

   VM >> Settings >> Network Interfaces >> Network Interface >> Settings >> Network Security Group >> Settings >> Inbound Rules