Re: containers

We use Docker and now Kubernetes extensively in CICD software testing, including in some cases Oracle databases. In a product I worked in previously, we used Docker to spin up dozens of Oracle RAC systems daily. This was a couple of years ago when Oracle told us it was impossible and pointless.

Seth

On Wed, May 29, 2019 at 2:17 AM Tim Hall <tim_at_oracle-base.com> wrote:

> Hi.
>
> We are using Docker for the application layer mostly. We have out Oracle
> REST Data Services (ORDS) running on Tomcat inside Docker. It's awesome and
> saves me so much time and is so much more flexible compared to when I was
> using regular tomcat instances. I think Docker fits in the middle tier so
> well that I now get annoyed when I have to use a regular VM.
>
> For one project I do web servers (Nginx), app servers (Rails) and
> databases (PorsgreSQL) all in Docker, using Swarm to define the
> infrastructure. I'm very happy with it. Small footprint database etc. Every
> weekend I rebuild all the images and replace the whole infrastructure with
> the latest & greatest in a few minutes. The "maintenance window" is a
> complete replacement of the entire stack. Docker is awesome for this.
> Obviously, config and data is kept in persistent volumes so it isn't lost.
>
> Typically I wouldn't recommend using Oracle in Docker. It works. I do it
> for demos, but really it's a play thing. I can't imagine doing anything
> serious with an Oracle database and Docker. Speaking to other folks, I get
> the same vibe from them. Large monolithic applications (Oracle, WebLogic
> etc.) don't play too well with Docker. They don't follow the typical
> container lifecycle of throw it away and replace with a newer version of
> the software.
>
> I've written a bunch of stuff about it here.
>
> https://oracle-base.com/articles/linux/articles-linux#docker
>
> I think that pretty much sums up my opinion on it, but it is just my
> opinion. :)
>
> Cheers
>
> Tim...
>
>>
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