zomo technology

krb5.conf and KDC protocol

Thursday, 08. 9. 2007  –  Category: all, sw

FreeBSD lets you do this:

[realms]
        FOO.FOOCORP.CO.UK = {
                kdc = tcp/kdc.foo.foocorp.co.uk
        }

Linux doesn’t let you specify the protocol, and will bork in a typically Kerberosly weird way should you try.

Debian / Ubuntu Exim wedging?

Tuesday, 08. 7. 2007  –  Category: all, sw

Is it doing TLS?

It’s likely running out of entropy. Debian package Exim linked against GNU’s TLS library, rather than the more common OpenSSL. It’ll suck /dev/random dry very quickly.

Lousy under-the-gun hack:

root@shangrila:/dev# rm random && mknod -m 664 /dev/random c 1 9
root@shangrila:/dev# ls -l /dev/*random
crw-rw-r-- 1 root root 1, 9 Aug  7 17:39 /dev/random
crw-rw-rw- 1 root root 1, 9 Aug  7 13:42 /dev/urandom
root@shangrila:/dev# 

This is bad for all kinds of reasons… (644 is what the manual says set it to, hmm.). Better ways exist.

Debian jib

mysqldump’s –skip-opt

Thursday, 12. 14. 2006  –  Category: all, sw

--skip-opt is a useful option to mysqldump – amongst other things it disables the extended INSERT syntax producing an INSERT per table row. That’s good for examing individual rows in the dump.

However, it also disables --create-options. This flag prevents any MySQL-specific schema stuff appearing in the dump. Unfortunately (for me, during a live deploy) is that this includes auto_increment:

$ mysqldump --no-data foo_livedb globalize_translations
-- MySQL dump 10.9
--
-- Host: localhost    Database: foo_livedb
-- ------------------------------------------------------
-- Server version       4.1.18-log

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

--
-- Table structure for table `globalize_translations`
--

DROP TABLE IF EXISTS `globalize_translations`;
CREATE TABLE `globalize_translations` (
  `id` int(11) NOT NULL auto_increment,
  `type` varchar(255) default NULL,
  `tr_key` varchar(255) default NULL,
  `table_name` varchar(255) default NULL,
  `item_id` int(11) default NULL,
  `facet` varchar(255) default NULL,
  `language_id` int(11) default NULL,
  `pluralization_index` int(11) default NULL,
  `text` text,
  PRIMARY KEY  (`id`),
  KEY `index_globalize_translations_on_tr_key_and_language_id` (`tr_key`,`language_id`),
  KEY `globalize_translation_table_item_lang` (`table_name`,`item_id`,`language_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

$ mysqldump --no-data --skip-opt foo_livedb globalize_translations
-- MySQL dump 10.9
--
-- Host: localhost    Database: foo_livedb
-- ------------------------------------------------------
-- Server version       4.1.18-log
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

--
-- Table structure for table `globalize_translations`
--

CREATE TABLE `globalize_translations` (
  `id` int(11) NOT NULL,
  `type` varchar(255) default NULL,
  `tr_key` varchar(255) default NULL,
  `table_name` varchar(255) default NULL,
  `item_id` int(11) default NULL,
  `facet` varchar(255) default NULL,
  `language_id` int(11) default NULL,
  `pluralization_index` int(11) default NULL,
  `text` text,
  PRIMARY KEY  (`id`),
  KEY `index_globalize_translations_on_tr_key_and_language_id` (`tr_key`,`language_id`),
  KEY `globalize_translation_table_item_lang` (`table_name`,`item_id`,`language_id`)
);

/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;