[debian-mysql] Jessie -> Stretch Migration

[Robie Basak]

Hi Frederic,

On Wed, Dec 07, 2016 at 05:58:16PM +0000, PICCA Frederic-Emmanuel wrote:
> In prder to install tango-db we need a running mysql-server.

If in tango-db.postinst you need a MySQL/MariaDB server to be configured
and running, then I'd have thought you'd need a Pre-Depends on
"default-mysql-server | virtual-mysql-server" or similar (or use the
-core equivalents and arrange this yourself). Otherwise the mysql
package postinst won't be guaranteed to have finished, so the daemon may
not have been started. I don't know if this is correct, but at least
that's a starting point.

However, I see that tango-db uses dbconfig-mysql as the mechanism to get
a database, rather than using mysql packaging directly. So in this case,
what you should do depends on the interface that dbconfig publishes. I'm
not familiar with this - dbconfig is not maintained as part of this
team. So I think perhaps you need to ask the dbconfig maintainer, and if
there's a problem with what mysql/mariadb packaging is doing then the
dbconfig maintainer can raise that with us.

HTH,

Robie
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