Docker with ClusterHAT

[Sammy Herring]

Dear all,

Hope you are well,

I'm a proud new owner of a Raspberry Pi ClusterHAT from the wonderful folks at Pimoroni. I've been playing around with the cluster and setup Webmin to control them all easily - for example to run cron jobs. However, I'm looking for advice in setting up Docker on the cluster. I've done a little research on setting up Docker on a single Raspberry Pi and it seems possible to do so on a single pi (albeit with some hindrance) but I am not certain on how to structure such a cluster.

Thanks,

Sam

[Didier Lüthi]

Hi Sammy,

I begin the POC :
http://blog.alexellis.io/live-deep-dive-pi-swarm/

[Anthony E.]

Thanks for the link Didier!  Following Alex's info at that link and the docs on the docker site it was very easy to get docker up and going on a Pi2 and four Pi Zeros using the ClusterHAT and create a docker swarm out of them.

Anthony

[Alex Ellis]

Hi all - it's Alex here, glad found the write-up useful!

I'm writing a tutorial on OTG networking and how to create a Docker Swarm - you can see a twitter post here:

I am trying to do this without a ClusterHAT initially because it makes the tutorial more accessible - the problem I'm finding is that the Pi2 can not supply power to 4x Pi Zeros and my Pi3 is very unreliable when powering 4x Zeros. I.e. I will get into a booting / rebooting loop when they're connected at once and can boot fine with none plugged in.

I'm using the black Official RPi power supply.

Alex

[Alex Ellis]

Initial proofs of the work:

https://twitter.com/alexellisuk/status/775798793736511488

Alex

[Didier Lüthi]

Hi Alex,

Thank you for your tutorial, my Swarm cluster works perfectly with 1x Raspi 2 and 4x Raspi Zero!

https://twitter.com/sky4055/status/776530055212204033

Didier