Buy Raspberry PI and SD card.
Download Raspbian Jessie Lite:
Unpack the image file, insert the SD cart, and write the image onto the card.
On a mac, using the terminal, first identify the sd card disk:
Unmount the disk identified, for example /dev/disk1 (not disk1s1)
diskutil unmountDisk /dev/disk1
Write the image
sudo dd bs=1m if=2017-04-10-raspbian-jessie-lite.img of=/dev/disk1
Now over to the PI
Insert the SD card, connect a monitor and a keyboard, connect a network cable, boot up
Set password and enable SSH in raspi config that starts on first boot.
If you don’t have a monitor, these are the keystrokes needed in the current version of Rasbpian Jessie Lite (4.4) to enable SSH, enter them slowly to be sure the raspberry has time to do stuff:
Power on the PI. Wait 2 minutes for it to boot to be sure. Type "pi" + ENTER Type "raspberry" + ENTER Type "sudo raspi-config" + ENTER (if you're not on an american keyboard the - sign is on the key to the right of 0) Arrow down 8 times + ENTER Arrow down 3 times + ENTER ENTER + ENTER TAB + TAB + ENTER
Find out the IP and connect via SSH using the terminal:
If you want to connect the raspberry directly to your mac via an ethernet cable;
Make sure you have DHCP enabled in Network Preferences, Go to Sharing menu, enable Internet Sharing from Wi-Fi.
Connect the raspberry, let it boot up, type
to find out the IP, one of the devices should be it, it’s usually something like 192.168.2.2.
Connect with the ssh command as mentioned above.
Once you’r in, first update and upgrade
sudo apt-get update sudo apt-get upgrade
Set the su password:
Install node via for example from Heroku
wget http://node-arm.herokuapp.com/node_latest_armhf.deb sudo dpkg -i node_latest_armhf.deb
Ok, now node is installed and we’re all set.
The following instructions assumes you already have created a node app that you want to pull from a git repository.
Create a deployment directory, i usually create deploy in /opt/deploy/xxx
You should generally never use sudo with git commands, so make sure pi is the owner of the deployment directory:
sudo chown -R pi /opt/deploy/
To set up git access, if this PI will be managed by others that don’t know your git password, it’s a good idea to set up deployment ssh key. That way you can pull from git without a password.
Refer to your git service documentation on how to set this up.
I use bitbucket, here’s the procedure:
First, on the PI, create a SSH key:
Just press enter for “enter a file” and password.
To get the content of the key, type:
Select and copy to clipboard.
Then go to the git hosting service in add this key.
Then you should be able to clone:
git clone ssh://[email protected]:XXXX/XXXX.git
If this does not work and you get permission denied errors – make sure you don’t run the command as sudo, but instead set the correct owner.
Next install node modules, in the root folder of the project
Assuming you have a package.json file that specifies the dependencies.
Test run the app:
Next up, you want to set up the node app to start on boot.
Recently I’ve been using Express generator more and more;
express –view=hbs –git myproject
I prefer using Process Manager 2:
sudo npm install pm2 -g
Next, set up pm2 to start on boot
sudo pm2 startup systemd -u pi
Next start the app
pm2 start app.js
Try it out by rebooting. It’s recommended to restart and stop the PI using commands like reboot, to prevent possible errors and loss of data:
When you log on again, the command:
Should show the app running.
Also, get to know the other pm2 commands, like pm2 restart, pm2 stop and pm2 delete.
And note that pm2 puts everything that is written to the console in ~/.pm2/logs/ for debugging.
If you want to use port 80 without running the app as sudo (which you generally shouldn’t) here’s one way to solve this:
sudo apt-get install libcap2-bin sudo setcap cap_net_bind_service=+ep /usr/local/bin/node
That’s it. Now you have an autostarting, git deployable node.js application running on the raspberry.
I will soon add: How to set fixed ip + how to connect the pi directly to a mac.