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A comment on My VM is lighter and safer than your container. Parent comment

Re:My VM is lighter and safer than your container by berdario on Friday November 03, 2017 @05:18AM (#15617738)
> Gone are the days of building a VM from scratch, following instructions for a previous version of the OS, installing 10 dependencies, installing the app, cursing when it fails half way through, installing another missing dependency, installing the app again, bouncing the server, and then having it all fall apart again because the app isn't registered to run as a service at startup (because you missed that step).

Weird, You wouldn't have to deal with Nginx and services for local development

What you describe doesn't sound like local development... But rather acceptance/manual integration or product/feature review/approval

But in places with good automation there's tools or a pipeline that automatically spins up instances (potentially containers) with your branch/feature and automatically link them to other services and exposes them

From this point of view, docker can be useful for deployments... But it's mostly useless for development, since it doesn't help with keeping prod/Dev environments identical to each other

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Re:My VM is lighter and safer than your container by koolba on Friday November 03, 2017 @07:49AM (#15618383)
> What you describe doesn't sound like local development... But rather acceptance/manual integration or product/feature review/approval

> ...

> But it's mostly useless for development, since it doesn't help with keeping prod/Dev environments identical to each other

If you're working on a feature that integrates with LDAP, you need an LDAP accessible locally. Docker lets you spin one up near instantly. The alternative I'm describing is to install the LDAP server locally or in a VM. Both are definitely options, but they're significantly more intrusive or involve (or both).

Ditto for a Postgres DB, a Redis server, or any other external resource needed by your app. It's not just for integration tests. You need them available to develop against and Docker provides a consistent way for everybody to spin up those resources quickly.

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