Re: containers

Interestingly, RAC on Docker is now *officially* supported for dev and test environments. See doc id 2216342.1
<https://support.oracle.com/epmos/faces/DocContentDisplay?id=2216342.1>.

On Wed, May 29, 2019 at 10:30 AM Seth Miller <sethmiller.sm_at_gmail.com> wrote:

> 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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