вторник, 22 декабря 2015 г.

Bye-bye, sysidtool, hello sysding

Often you want to have some simple tool to configure basic system settings after installation, such as ip settings, time zone settings, locales and so on. More important, installer also sometimes needs similar utility, which would run on first boot and initialize basic system parameters. For example, OmniOS runs /.initialboot script on the first boot. Solaris historically had sysidtool service, which read /etc/sysidcfg file and used it to configure zones or base system. Sysidtool also had ncurses-based interface to perform basic zone configuration.
The disadvantage of sysidtool is that it is a closed source tool, and you cannot fix it if you want it to do a bit more. So, we switched to sysding in OpenIndiana Hipster.
Sysding was originally written by Olaf Bohlen (Agnar at #oi-dev) to configure multiple illumos/Solaris zones. It doesn't have interactive interface, but has a set of utility functions to write configuration scripts. File /etc/sysding.conf is a simple ksh script, sourced by /lib/svc/method/sysding on . /lib/svc/method/sysding predefines some useful functions which can be necessary for initial configuration. Sample configuration file can look like
setup_timezone Europe/Moscow
setup_locale en_US.UTF-8
setup_user_password root '$5$+Fu+utqXFqU=$RD2LbFipqwKc2srNFYnVkda9U6K2pmMajvuR3iyHzR'
setup_interface PRIMARY v4
setup_route default
setup_ns_dns "stud.lan" "stud.lan notebook.lan" ""

Using it, sysding will set timezone, locale, root password, network settings on first boot and reboot zone (or NGZ), because /etc/default/init was changed. It also cares about setting root password to 'NP' at first boot in zone if it's empty and you haven't specified one. Without this you wouldn't be able to "zlogin" to the zone. It can do a bit more. If you are interested, look at /lib/svc/method/sysding . If you want to have some customizations for your environment, create pull requests against https://github.com/OpenIndiana/sysding/, but don't forget two things: test your changes thoroughly and keep in mind that sysding was created to be a simple configuration tool.

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