User story #8230
Updated by Alexis Mousset over 7 years ago
h2. Status of package management This table only considers latest versions of techniques and generic methods. |_.name|_.OS|_.body|_.package list update frequency (yum update, etc.)|_.package list update frequency configurable?|_.handles installing "latest" version|_.available updates list frequency configurable?|_.handles "update or add if not installed"|_.handles "install a specific, not latest version"|_.execution installed"|_.execution frequency configurable (class persistence)| |rpm package installation 7.0 technique|RHEL/CentOS/SLES|generic_nobulk (in the technique)| 30 minutes | no | yes | yes (default is 60 minutes) | no | no | yes (default to 60 minutes)| |apt package installation 4.0 technique|Ubuntu/Debian|apt_nobulk (in the technique)|30 minutes | no | no | no | no| no | no| |package_install_* generic methods|Debian/Ubuntu|apt_get (in cfengine stdlib)|240 minutes| no | no | no | yes | no| no | |package_install_* generic methods|RHEL/CentOS|yum_rpm (in cfengine stdlib)|240 minutes| no | no | no | yes |no| | no | |package_install_* generic methods|SLES|ncf_generic (in ncf stdlib)|240 minutes | no | no | no | yes|yes yes | no | |package_{present,absent} generic methods|RHEL,Debian/Ubuntu,FreeBSD| | 240 minutes ? | no ? | yes | no ? | yes |yes| | no | Constraints: * The addupdate action does not work * We need to handle "update to latest version" manually using a list of available updates to call CFEngine with a precise version * ncf does not (currently) handles reporting for multiple calls with the same generic method on the same package * We have to stay compatible with all current package management methods Goals: * Ability to ensure the package is in "latest" version * Ability to update or install if needed in a single action * Flexibility on caching/execution frequency to allow: ** Fast actions (provisioning, security updates, ...) ** Low overhead on small/embedded devices * Fix targeting current versions, at least 3.1 h2. Option 1 Make one configurable package management method working properly and use it everywhere. * Use @ncf_generic@ body everywhere in ncf * Add available updates list support to package_install_* ** Move rpm support to the generic method ** Add apt support * Make list update frequency configurable ** ncf configuration parameter ? ** Generic method parameter ? * Make a new version of RPM and APT package techniques using @package_install_@ Issues: * Some people implemented addupdate using directives with add+update on the same package, which cannot be handled properly with ncf reporting h2. Option 2 Make one configurable package management method working properly in ncf, and fix packages techniques by handling add + update actions * Use @ncf_generic@ body everywhere in ncf * Add available updates list support to package_install_* * Add support for available updates in apt technique * Make list update frequency configurable in ncf (and maybe in the techniques too) ** ncf configuration parameter ? ** Generic method parameter ? Issues: * Duplicates a lot of logic in ncf/techniques h2. Other notes We should have a plan to migrate to the new CFEngine package promises, which are now the default in 3.9. This should widely simplify our code on new CFEngine version (Rudder 3.2+). We can use if_version macro feature for this, which will be easier if all package operations are done in a single place.