Pither.com / Simon
Development, systems administration, parenting and business

Variable substitution in docker-compose .env env-files

I was recently given an existing set of files to create a collection of Docker containers via the docker-compose tool. Unfortunately this rapidly led to some annoyances with variable substitutions within a docker-compose (.env) env-file. This is the kind of thing I mean:

DOMAIN=example.org
EMAIL=admin@${DOMAIN}

The problem was that they don't seem to be supported in docker-compose 1.25.5 (as shipped …

Tags: technology


I've started a podcast!

It seems to be the thing to do these days, starting a podcast, so I thought I'd join in.

I've been a fan of property since I was very young. While my career has primarily followed other things, I've been a property investor (fancy term for a landlord) for nearly twenty years.

More recently I've also moved my main career …



Photo Friday: 2019-12-20

The "tree house" at (Chartwell)[https://www.nationaltrust.org.uk/chartwell], and a view out from inside it.

Taken in August 2018.

View from the tree house

Chartwell tree house

Tags: photo-friday











Photo Friday: 2019-10-04

Another building focussed photo this week, this time with the Shard as the main feature. Taken as we wandered to The Tower of London.

Taken in August 2019.

The Shard across the Thames

Tags: photo-friday




Redhill technology events: Red Sprite

Since March, Neil (of Terzo Digital) and I have been running a relaxed and free technology evening each month.

We created Red Sprite as a way to give back to the local community while also having fun. The events are intended to educate as well as entertain; with a variety of formats and topics being covered.

Having passed our …