Set Up and Run SmokeDetector

Setting Up SmokeDetector

Basic setup

To set up SmokeDetector (SD), please execute the following commands:

git clone https://github.com/Charcoal-SE/SmokeDetector.git
cd SmokeDetector
git checkout deploy
sudo pip3 install -r requirements.txt --upgrade
pip3 install --user -r user_requirements.txt --upgrade

Next, copy config.sample to a new file called config, and edit the values required. If you are going to be running this SmokeDetector instance as a normal SD instance with metasmoke, see the “config” file with MS below.

You should now be able to run SmokeDetector.

Running SmokeDetector with metasmoke

You will need a keybase account. You will also need to have the “smoke detector runner” role on metasmoke (MS). Contact an MS admin to request the role. When given the role, you should separately be added to the “charcoal” channel on keybase.

The “config” file with MS

In the files section for the keybase “charcoal” channel, there is a “config” file. You should use that config file as a basis for the “config” file you use in your “SmokeDetector” directory.

• Set location to the name you choose for your SD instance. This should be your username, followed by a slash and an identifier that’s unique among all your Smokey instances. This is the name that your instance will display in messages in chat and what will be displayed on MS for status.
• Set metasmoke_key
  • On metasmoke in the dropdown for your username, select “My SmokeDetectors”.
  • Click on “create a new key” and enter the name you used for location above.
  • Once you complete the dialog, your SD instance will be listed and you can copy the “Key” to metasmoke_key.
• Save the “config” file, as those are the only changes you need.

Run SmokeDetector

At this point, you should be able to run SmokeDetector using the instructions below.

Setting up an AWS EC2 linux instance for SmokeDetector

Using a AWS EC2 instance can be a quick way to get an SD instance up and running. Based on reports from @iBug in chat, a t2.micro instance, what’s available from the AWS Free Tier for 12 months, doesn’t have enough CPU credits for the instance to be the active SD instance full-time. It’s expected that a t3.micro, which actually costs less than a t2.micro, once past the free period, should be sufficient for a full-time active SD instance. However, a t2.micro instance does appear to be enough for SD to run as a standby instance to fill in on an irregular basis.

To set-up a t2.micro instance for SD you can do the following:

• Create the EC2 instance (launch a AWS instance tutorial)
  • Create an AWS account (address, verifiable phone number, and credit card required) and Sign-in to the AWS console.
  • Click “Launch Instance ->”
  • Click “Select” for “Amazon Linux AMI 2018.03.0 (HVM), SSD Volume Type - ami-0cd3dfa4e37921605” (the first one in the Amazon Machine Image (AMI) list)
    • You can pick any flavor of Linux you’re familiar with, just remember to substitute installation commands for the correct package manager. For example, the above version of Linux uses yum. Other versions may use apt-get, rpm, or pacman etc. In addition, other versions of Linux may already have versions of some of the packages installed in the commands below, or may be missing yet other packages. The commands listed below were only tested in the AMI mentioned above.
  • Click “Review and Launch”
  • Click “Launch”
  • Create a public key pair, or use one you’ve previously created.
    • If creating a new public key pair, download the private key to somewhere on your system from which you can run ssh.
  • Click “View Instances”
  • Select the new instance
  • Click “Connect”
  • Use ssh to connect to EC2 instance:
    • Copy-&-paste the example ssh line in the popup into a command line running in the directory where you stored the .pem file with the private key (created or selected earlier).

• Execute the following commands. You can copy-&-paste all of them at one time. The commands above the blank line get your EC2 instance to where SmokeDetector can be installed (only tested in the AMI mentioned above). The commands below the blank line clone SmokeDetector from GitHub and install its Python dependencies (the commands below the blank line are a duplicate of those at the top of this page, but are included below to make copy-&-pasting easier):

  sudo yum -y update
  sudo yum -y install gcc
  sudo yum -y install git
  sudo yum -y install python36
  sudo yum -y install python36-devel
  sudo python3 -m pip install pip --upgrade
    
  git clone https://github.com/Charcoal-SE/SmokeDetector.git
  cd SmokeDetector
  git config user.email "[email protected]"
  git config user.name "SmokeDetector"
  git checkout deploy
  sudo /usr/local/bin/pip3 install -r requirements.txt --upgrade
  pip3 install --user -r user_requirements.txt --upgrade
  

• Create the “config” file
  • See The “config” file with MS above if you are going to use this SD instance with metasmoke.
  • If you are not going to run this SD instance with metasmoke, then copy config.sample to a new file called config, and edit the values required.

Running SmokeDetector

To run, use python3 nocrash.py, or python3 nocrash.py standby (preferably in a daemon-able mode, like a screen session). You can also use python3 ws.py, but then SmokeDetector will be shut down after 6 hours; when running from nocrash.py, ws.py will automatically be restarted. (This is to be sure that closed WebSockets, if any, are reopened.)

nocrash.py

nocrash.py is the controlling Python code for SmokeDetector. It runs ws.py, which is the SD instance, in a subprocess and restarts the SD instance when it stops. ws.py may stop as the result of various chat !!/ commands, or do to errors. The syntax for nocrash.py is:

nocrash.py [standby] [--loglevel=(debug|info|warning|error)] [no_se_activity_scan]

The standby option starts the SD instance in standby mode.

The no_se_activity_scan option causes the SD instance not to watch the SE WebSocket for new posts, even when the instance is active. This gives you an SD instance which will listen for commands in chat, but won’t be scanning for new posts, other than ones you !!/scan or !!/report.

_{Portions of this page were taken from README.md.}