Re: automating database creation

Hi Nenad,
DBCA, other than creating the database, does things it is not requested to do (e.g. registering the database as single-instance with srvctl if it detects the Clusterware but the option RAC is not chosen). A customer of mine was using DBCA in a nicely automated environment (600+ databases) but at every new version DBCA was introducing a new surprise (and DBUA FWIW, I am a fan of autoupgrade but I dislike DBUA). Creating a database with your own scripts allows you to have full control on the options, the pre and post executions, the logging, etc. What I would do if I have to start again is to have a first script that automates the creation of new templates from scratch (CREATE DATABASE {{tpl_name}} ...) and a second one that clones the template: copy of datafiles + create controlfile + dbid + add tempfiles, nothing complex at all. In this way you can also integrate the database creation with the management of your ACFS filesystem, if you want to leverage snapshots. The same goes for the PDBS, it is not just a matter of "create pluggable database", there are tons of actions to do to create them properly for your environment.

Ansible, python or shell (if done properly) are good solutions for that. Then you can integrate with something like RunDeck (or ORDS/DBMS_SCHEDULER to stay in the Oracle scope) to add a REST interface for a higher level of automation/integration with 3rd party tools.

Just my 2 cents.

-- 
Ludovico


Il giorno ven 14 ago 2020 alle ore 15:29 Noveljic Nenad <
nenad.noveljic_at_vontobel.com> ha scritto:



> Thank you, Yogi, for your detailed answer. Also thanks to all others who


> responded to my e-mail.

>

>

>

> Our current automation seems similar to yours – a home grown program

> (Perl, in this case) that creates file systems, listener configuration,

> ldap aliases, runs cat*sql, and some environment specific scripts based on

> application configurations, registers to OEM, RMAN, etc.. But since for 20c

> we have to move from Solaris/non-multi-tenant/ZFS to

> Linux/multi-tenant/ACFS, we, effectively, have to build everything from

> scratch. In doing so, we’d like to transition from Perl to Python, too.

> It’s also a good opportunity to review and improve our current practices.

> (Niall, I’m also against completely rebuilding something that works well,

> but we’re forced by the circumstances.)

>

>

>

> The main dilemma is whether to switch to dbca. We evaluated it 10 years

> ago and decided against it. Your answer is crisp and clear. Interestingly,

> it’s opposite to what others suggested. We plan to evaluate dbca for

> ourselves, but, at the same time, other people’s insights, specially about

> the pitfalls, are invaluable. Obviously, if we decide to use dbca, we’d

> need to remove unused options, either by deinstalling them or using our own

> templates.

>

>

>

> Best regards,

>

>

>

> Nenad

>

> https://nenadnoveljic.com/blog/about/

> <https://urldefense.com/v3/__https:/nenadnoveljic.com/blog/about/__;!!GvC3Dl69FG1X3k3XzQ!KZ-YtPjOpVdKpz3XqsB6VQJHXbGyHr_h57YFQFFviDiZM22g94_c6JpozP7S4lBodw$>

>

>

>

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