This is a WordPress site with nginx running in a Docker container on Raspberry PI3.

This site is a demo about running a LEMP (Linux+Nginx+MySql+PHP) on a hardware low-power consumption.

The Raspberry model B normally consumes 230 mA when in idle mode while using 500 mA at least with no device connected ( see https://raspi.tv/2018/how-much-power-does-raspberry-pi-3b-use-power-measurements and  https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/README.md ) , anyway the power of a Raspberry model B is less than 4W. 

It’s running Raspbian, based on Debian 8.

Docker is v. 1.12.4 , nginx is 1.6.2 and kernel 4.4.34-v7.

WordPress is 4.9.8 and using plugins like Metaslider, Google Doc Embedder and other.

There is another container running nginx with  a WikiMedia site .

December 2018

 

And now the system is growing … 

The stack is made up by 4 Raspberry running Kubernetes as 1 Master and 3 Nodes …  

After some problems with SD cards, following the link  https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md,  the cluster Kubernetes is booting from USB key with a significative performance improvement.

If you’ve a B3+, everything is OK but, if you’re using a B3, you have to add the parameter program_usb_boot_mode=1 to the file /boot/config.txt