G'day:
(That's a callback of sorts to today's earlier article Clustering a PHP app with Kubernetes (or "Why the f*** do I put myself through this shite?"), which clocks in a ~5500 words).
To do the equivalent in a dev environment with Docker Swarm, one does this:
$ docker swarm init --advertise-addr 127.0.0.1 Swarm initialized: current node (fn3o7kmnep81j28xjsth094z6) is now a manager.
And then one does this:
$ docker service create \
--name php \
--replicas 3 \
--publish published=9000,target=9000 \
--env-file docker/envVars.public \
--env-file docker/php/envVars.public \
--env-file docker/php/envVars.prod.public \
--env-file docker/envVars.private \
--env-file docker/php/envVars.private \
--host host.docker.internal:host-gateway \
adamcameron/php8-on-k8s:latest
fw3j4qtrpe2lgesr0x3tbeiaa
overall progress: 3 out of 3 tasks
1/3: running [==================================================>]
2/3: running [==================================================>]
3/3: running [==================================================>]
verify: Service fw3j4qtrpe2lgesr0x3tbeiaa converged
And then… erm… no actually that's it. That works. Done.
Obviously this (and the other article) and for dev-ony messing around with things, and I have no idea how to manage Kubernetes or Docker Swarm. But one took a week to work out WTF. And the other took about an hour. Inciuding the time it's gonna take to write this.
Source code has been updated in the repo I was using before, and tagged as 0.9. It's changes to the README.md, and making a label more generic ("Pod name" => "Instance ID").
Oh, and I was working from these docs: Manuals / Docker Engine / Swarm mode. Beyond a point I was able to guess what I needed to do.
Righto.
--
Adam
