Re: Help setting dbconfig-common for MariaDB, not MySQL
On Mon, 2 Jan 2023 17:08:25 +0100, Paul Gevers wrote: >Hi Marc, > >On 02-01-2023 16:58, Marc Haber wrote: >> On Mon, 2 Jan 2023 16:31:17 +0100, Paul Gevers >> wrote: >>> On 02-01-2023 14:21, Alessandro Vesely wrote: A user complained that MySQL doesn't work, because it misses the INET6 type that the example settings use. >>> >>> And is this an absolute must? (It's an example after all?) >> >> It is. We need to stop having "disable IPv6" as measure 1 if something >> doesn't work right. It's the default IP protocol for a decade. > >Are you saying that MySQL doesn't support IPv6? Or just that the "INET6 >type" in the context of MariaDB is a MariaDB specific implementation of >something? (Sorry, I didn't investigate and assumed the latter). I didn't investigate and assumed some kind of the former. Anyway, since we have a diversion between MySQL and MariaDB here that causes dbconfig-common to trip over an IPv6 issue, I see the usual solution coming over the horizon and wanted to object against that one. Greetings Marc -- -- !! No courtesy copies, please !! - Marc Haber | " Questions are the | Mailadresse im Header Mannheim, Germany | Beginning of Wisdom " | Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 621 72739834
Re: Help setting dbconfig-common for MariaDB, not MySQL
On Mon 02/Jan/2023 16:31:17 +0100 Paul Gevers wrote: Hi Alessandro, Hi, thanks for replying. On 02-01-2023 14:21, Alessandro Vesely wrote: please pardon my ignorance about Debian install. I'm distributing a software which could use various DBMS'es by setting a number of parameters. Example parameters are only given for MariaDB. I distribute a debian/ directory that Debian users can use to prepare a package instead of configure, make, make install. However, the debian/postinst supports MariaDB only. Do I understand you correctly that you don't want to support MySQL? Yes, it'd be too much work to create, test, and debug the settings for an alternative DBMS. A user complained that MySQL doesn't work, because it misses the INET6 type that the example settings use. And is this an absolute must? (It's an example after all?) Well the reference example started using INET6 a few years ago, to store both IPv4 and IPv6 addresses. It simplified settings somewhat. Reverting to the previous state is too bad. A user needing to work with MySQL can replace INET6 with a suitable BLOB, and change all the related queries and configs accordingly. The existing debian/postinst won't work in that case. It could be easily adapted, IF the relevant queries and configs were given... Now I've added "mariadb-client | mariadb-server | dbconfig-no-thanks" to the Debian clause in debian/control. I think that's wrong. At least it would fail to install dbconfig-common in case there is a mariadb-client installed. Also, I wonder about the mariadb-server part. mariadb-server depends on the versioned mariadb-server-* package which depends on the versioned mariadb-client-* package. So in case mariadb-client wouldn't be able to be fulfilled, mariadb-server as the second alternative isn't going to help. And in my opinion you should not depend on the server part. As with most databases, the server part can live on a different host and package should really not force the server to be on the same host. Would "mariadb-client | dbconfig-no-thanks" work? But see below. I'm not clear how I could add an (optional) Conflicts mysql-something, also because I see no mysql-server in the package cache. mysql-server is available in unstable, but we don't want to support both MySQL and MariaDB in Debian stable at the same time, so currently MySQL is blocked from migration. However, derivatives choose differently (Ubuntu supports MySQL in their releases). Indeed, the user who complained was on Ubuntu 22.04 and MySQL version 8.0.23. He asked me to add MariaDB to the list of requirements. Perhaps he can install requirements according to what I write in debian/control Depend. If I only require mariadb-client and then the server is MySQL, it won't run. Is there a way to fail if a user chooses to install the DB but MariaDB is missing? Or is the above enough? I don't think you can do it with dependencies. If you really want to go this route, you have to detect it during run time. Yeah, not very nice, but still better to discover it at runtime. The database creation with INET6 types will fail on Ubuntu. Than
Re: Help setting dbconfig-common for MariaDB, not MySQL
Hi Marc, On 02-01-2023 16:58, Marc Haber wrote: On Mon, 2 Jan 2023 16:31:17 +0100, Paul Gevers wrote: On 02-01-2023 14:21, Alessandro Vesely wrote: A user complained that MySQL doesn't work, because it misses the INET6 type that the example settings use. And is this an absolute must? (It's an example after all?) It is. We need to stop having "disable IPv6" as measure 1 if something doesn't work right. It's the default IP protocol for a decade. Are you saying that MySQL doesn't support IPv6? Or just that the "INET6 type" in the context of MariaDB is a MariaDB specific implementation of something? (Sorry, I didn't investigate and assumed the latter). Paul OpenPGP_signature Description: OpenPGP digital signature
Re: Help setting dbconfig-common for MariaDB, not MySQL
On Mon, 2 Jan 2023 16:31:17 +0100, Paul Gevers wrote: >On 02-01-2023 14:21, Alessandro Vesely wrote: >> A user complained that MySQL doesn't work, because it misses the INET6 >> type that the example settings use. > >And is this an absolute must? (It's an example after all?) It is. We need to stop having "disable IPv6" as measure 1 if something doesn't work right. It's the default IP protocol for a decade. Greetings Marc -- -- !! No courtesy copies, please !! - Marc Haber | " Questions are the | Mailadresse im Header Mannheim, Germany | Beginning of Wisdom " | Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 621 72739834
Re: Help setting dbconfig-common for MariaDB, not MySQL
Hi Alessandro, On 02-01-2023 14:21, Alessandro Vesely wrote: please pardon my ignorance about Debian install. I'm distributing a software which could use various DBMS'es by setting a number of parameters. Example parameters are only given for MariaDB. I distribute a debian/ directory that Debian users can use to prepare a package instead of configure, make, make install. However, the debian/postinst supports MariaDB only. Do I understand you correctly that you don't want to support MySQL? Or that you don't know how to support both at the same time? Most packages in Debian that are using MariaDB or MySQL can easily support both (hence we have the default-mysql-client and virtual-mysql-client packages), and indeed dbconfig-common treats them as equal. A user complained that MySQL doesn't work, because it misses the INET6 type that the example settings use. And is this an absolute must? (It's an example after all?) Now I've added "mariadb-client | mariadb-server | dbconfig-no-thanks" to the Debian clause in debian/control. I think that's wrong. At least it would fail to install dbconfig-common in case there is a mariadb-client installed. Also, I wonder about the mariadb-server part. mariadb-server depends on the versioned mariadb-server-* package which depends on the versioned mariadb-client-* package. So in case mariadb-client wouldn't be able to be fulfilled, mariadb-server as the second alternative isn't going to help. And in my opinion you should not depend on the server part. As with most databases, the server part can live on a different host and package should really not force the server to be on the same host. I'm not clear how I could add an (optional) Conflicts mysql-something, also because I see no mysql-server in the package cache. mysql-server is available in unstable, but we don't want to support both MySQL and MariaDB in Debian stable at the same time, so currently MySQL is blocked from migration. However, derivatives choose differently (Ubuntu supports MySQL in their releases). As mentioned above, the server part can be on a different host, but ependencies are not able to describe incompatibility with what runs on the other host. Is there a way to fail if a user chooses to install the DB but MariaDB is missing? Or is the above enough? I don't think you can do it with dependencies. If you really want to go this route, you have to detect it during run time. Paul OpenPGP_signature Description: OpenPGP digital signature
Help setting dbconfig-common for MariaDB, not MySQL
Hi, please pardon my ignorance about Debian install. I'm distributing a software which could use various DBMS'es by setting a number of parameters. Example parameters are only given for MariaDB. I distribute a debian/ directory that Debian users can use to prepare a package instead of configure, make, make install. However, the debian/postinst supports MariaDB only. A user complained that MySQL doesn't work, because it misses the INET6 type that the example settings use. Now I've added "mariadb-client | mariadb-server | dbconfig-no-thanks" to the Debian clause in debian/control. I'm not clear how I could add an (optional) Conflicts mysql-something, also because I see no mysql-server in the package cache. Is there a way to fail if a user chooses to install the DB but MariaDB is missing? Or is the above enough? Thanks in advance for any hint Ale --
