Installing VOLTTRON

Install Required Software

Ensure that all the required packages are installed.

Clone VOLTTRON source code

From version 6.0 VOLTTRON supports two message bus - ZMQ and RabbitMQ.

git clone https://github.com/VOLTTRON/volttron --branch <branch name>

For other options see: Getting VOLTTRON

Setup virtual environment

The VOLTTRON project includes a bootstrap script which automatically downloads dependencies and builds VOLTTRON. The script also creates a Python virtual environment for use by the project which can be activated after bootstrapping with “. env/bin/activate”. This activated Python virtual environment should be used for subsequent bootstraps whenever there are significant changes. The system’s Python need only be used on the initial bootstrap.

Steps for ZMQ

cd <volttron clone directory>
python bootstrap.py
source env/bin/activate

Proceed to Testing the Installation.

Steps for RabbitMQ

1. Install Erlang version 21 packages

For RabbitMQ based VOLTTRON, some of the RabbitMQ specific software packages have to be installed. If you are running an Debian or CentOS system, you can install the RabbitMQ dependencies by running the rabbit dependencies script, passing in the os name and approriate distribution as a parameter. The following are supported

  • debian bionic (for Ubuntu 18.04)
  • debian xenial (for Ubuntu 16.04)
  • debian xenial (for Linux Mint 18.04)
  • debian stretch (for Debian Stretch)
  • centos 7 (for CentOS 7)
  • centos 6 (for CentOS 6)

Example command

./scripts/rabbit_dependencies.sh debian xenial

Alternatively

You can download and install Erlang from Erlang Soultion Please include OTP/components - ssl, public_key, asn1, and crypto. Also lock version of Erlang using the yum-plugin-versionlock

2. Configure hostname

Make sure that your hostname is correctly configured in /etc/hosts. See this link for more details. If you are testing with VMs make please make sure to provide unique host names for each of the VM you are using.

Hostname should be resolvable to a valid ip when running on bridged mode. RabbitMQ checks for this during initial boot. Without this (for example, when running on a VM in NAT mode) RabbitMQ start would fail with the error “unable to connect to empd ( port 4369) on <hostname>.”

Note: RabbitMQ startup error would show up in syslog (/var/log/messages) file and not in RabbitMQ logs (/var/log/rabbitmq/rabbitmq@hostname.log)

3. Bootstrap

Install the required software by running the bootstrap script with –rabbitmq option

cd volttron

# bootstrap.py --help will show you all of the "package options" such as
# installing required packages for volttron central or the platform agent.

python bootstrap.py --rabbitmq [optional install directory. defaults to
 <user_home>/rabbitmq_server]

This will build the platform and create a virtual Python environment and dependencies for RabbitMQ. It also installs RabbitMQ server as the current user. If an install path is provided, path should exists and be writeable. RabbitMQ will be installed under <install dir>/rabbitmq_server-3.7.7 Rest of the documentation refers to the directory <install dir>/rabbitmq_server-3.7.7 as $RABBITMQ_HOME

You can check if RabbitMQ server is installed by checking it’s status.

$RABBITMQ_HOME/sbin/rabbitmqctl status

Please note, RABBITMQ_HOME environment variable can be set in ~/.bashrc. If doing so, it needs to be set to RabbitMQ installation directory (default path is <user_home>/rabbitmq_server/rabbitmq_server/rabbitmq_server-3.7.7)

echo 'export RABBITMQ_HOME=$HOME/rabbitmq_server/rabbitmq_server-3.7.7'|sudo tee --append ~/.bashrc | source ~/.bashrc

4. Activate the environment

source env/bin/activate

5. Create RabbitMQ setup for VOLTTRON

vcfg --rabbitmq single [optional path to rabbitmq_config.yml]

Refer to examples/configurations/rabbitmq/rabbitmq_config.yml for a sample configuration file. At a minimum you would need to provide the host name and a unique common-name (under certificate-data) in the configuration file. Note. common-name must be unique and the general conventions is to use -root-ca.

Running the above command without the optional configuration file parameter will prompt user for all the needed data at the command prompt and use that to generate a rabbitmq_config.yml file in VOLTTRON_HOME directory.

This scripts creates a new virtual host and creates SSL certificates needed for this VOLTTRON instance. These certificates get created under the sub directory “certificates” in your VOLTTRON home (typically in ~/.volttron). It then creates the main VIP exchange named “volttron” to route message between platform and agents and alternate exchange to capture unrouteable messages.

NOTE: We configure RabbitMQ instance for a single volttron_home and volttron_instance. This script will confirm with the user the volttron_home to be configured. volttron instance name will be read from volttron_home/config if available, if not user will be prompted for volttron instance name. To run the scripts without any prompts, save the volttron instance name in volttron_home/config file and pass the volttron home directory as command line argument For example: “vcfg –vhome /home/vdev/.new_vhome –rabbitmq single”

Following is the example inputs for “vcfg –rabbitmq single” command. Since no config file is passed the script prompts for necessary details.

Your VOLTTRON_HOME currently set to: /home/vdev/new_vhome2

Is this the volttron you are attempting to setup?  [Y]:
Creating rmq config yml
RabbitMQ server home: [/home/vdev/rabbitmq_server/rabbitmq_server-3.7.7]:
Fully qualified domain name of the system: [cs_cbox.pnl.gov]:

Enable SSL Authentication: [Y]:

Please enter the following details for root CA certificates
Country: [US]:
State: Washington
Location: Richland
Organization: PNNL
Organization Unit: Volttron-Team
Common Name: [volttron1-root-ca]:
Do you want to use default values for RabbitMQ home, ports, and virtual host: [Y]: N
Name of the virtual host under which RabbitMQ VOLTTRON will be running: [volttron]:
AMQP port for RabbitMQ: [5672]:
http port for the RabbitMQ management plugin: [15672]:
AMQPS (SSL) port RabbitMQ address: [5671]:
https port for the RabbitMQ management plugin: [15671]:
INFO:rmq_setup.pyc:Starting rabbitmq server
Warning: PID file not written; -detached was passed.
INFO:rmq_setup.pyc:**Started rmq server at /home/vdev/rabbitmq_server/rabbitmq_server-3.7.7
INFO:requests.packages.urllib3.connectionpool:Starting new HTTP connection (1): localhost
INFO:requests.packages.urllib3.connectionpool:Starting new HTTP connection (1): localhost
INFO:requests.packages.urllib3.connectionpool:Starting new HTTP connection (1): localhost
INFO:rmq_setup.pyc:
Checking for CA certificate

INFO:rmq_setup.pyc:
Root CA (/home/vdev/new_vhome2/certificates/certs/volttron1-root-ca.crt) NOT Found. Creating root ca for volttron instance
Created CA cert
INFO:requests.packages.urllib3.connectionpool:Starting new HTTP connection (1): localhost
INFO:requests.packages.urllib3.connectionpool:Starting new HTTP connection (1): localhost
INFO:rmq_setup.pyc:**Stopped rmq server
Warning: PID file not written; -detached was passed.
INFO:rmq_setup.pyc:**Started rmq server at /home/vdev/rabbitmq_server/rabbitmq_server-3.7.7
INFO:rmq_setup.pyc:

#######################

Setup complete for volttron home /home/vdev/new_vhome2 with instance name=volttron1
Notes:
- Please set environment variable VOLTTRON_HOME to /home/vdev/new_vhome2 before starting volttron
- On production environments, restrict write access to
/home/vdev/new_vhome2/certificates/certs/volttron1-root-ca.crt to only admin user. For example: sudo chown root /home/vdev/new_vhome2/certificates/certs/volttron1-root-ca.crt
- A new admin user was created with user name: volttron1-admin and password=default_passwd.
You could change this user's password by logging into https://cs_cbox.pnl.gov:15671/ Please update /home/vdev/new_vhome2/rabbitmq_config.yml if you change password

#######################

Testing the Installation

We are now ready to start VOLTTRON instance. If configured with RabbitMQ message bus a config file would have been generated in $VOLTTRON_HOME/config with the entry message-bus=rmq. If you need to revert back to ZeroMQ based VOLTTRON, you will have to either remove “message-bus” parameter or set it to default “zmq” in $VOLTTRON_HOME/config. The following command starts volttron process in the background

volttron -vv -l volttron.log&

This enters the virtual Python environment and then starts the platform in debug (vv) mode with a log file named volttron.log.

Warning

If you plan on running VOLTTRON in the background and detaching it from the terminal with the disown command be sure to redirect stderr and stdout to /dev/null. Some libraries which VOLTTRON relies on output directly to stdout and stderr. This will cause problems if those file descriptors are not redirected to /dev/null

#To start the platform in the background and redirect stderr and stdout
#to /dev/null
volttron -vv -l volttron.log > /dev/null 2>&1&

Next, start an example listener to see it publish and subscribe to the message bus:

scripts/core/upgrade-listener

This script handles several different commands for installing and starting an agent after removing an old copy. This simple agent publishes a heartbeat message and listens to everything on the message bus. Look at the VOLTTRON log to see the activity:

tail volttron.log
2016-10-17 18:17:52,245 (listeneragent-3.2 11367) listener.agent INFO: Peer: 'pubsub', Sender: 'listeneragent-3.2_1':, Bus: u'', Topic: 'heartbeat/listeneragent-3.2_1', Headers: {'Date': '2016-10-18T01:17:52.239724+00:00', 'max_compatible_version': u'', 'min_compatible_version': '3.0'}, Message: {'status': 'GOOD', 'last_updated': '2016-10-18T01:17:47.232972+00:00', 'context': 'hello'}

To stop the platform:

volttron-ctl shutdown --platform

Note: The default working directory is ~/.volttron. The default directory for creation of agent packages is ~/.volttron/packaged

Next Steps

Now that the project is configured correctly, see the following links for agent development:

Please refer to related topics to for advanced setup instructions