On Wed, Jul 9, 2014 at 3:12 PM, Andrew Purtell <[email protected]> wrote: > I wonder if relocatable DEBs are possible. (Some quick googling suggests > not?) If not, relocatable RPMs would be a substantial amount of work for a > half measure.
Truly relocatable DEBs are next to impossible. However, after having a chance to deal with this issue back at Cloudera, I'm now firmly convinced that somebody asking for relocatable packages is typically asking for two things: #1 be able to install different versions of the same package side-by-side #2 be able to install under a common subtree (such as /opt/our/hadoop) In both of these cases, the package ends up being treated as a glorifies tarball. Why? Well, because: * pre/post install scriplets are downright *dangerous* in those scenarious * you have to do all the hooks to /etc/init.d &co manually anyway * you can't really use the goodness of yum repos & such. If packages indeed are treated as a glorified tarballs -- what's wrong with dpkg -x pkg.deb /path and rpm2cpio pkg.rpm | cpio -i --make-directories ? > I also think that if looking for deployment vehicles supporting concurrent > installation of multiple component versions, we'd be better served putting > project energy into LXC based deployment management and packaging. (That > could be _really_ interesting, if for example containers have a late binding > on dependencies, where they ask other containers during boot and service > discovery to supply them with packages to install... I know, a crazy idea, > not meant to lead this discussion off on a tangent) Very much +1 to that! At Pivotal (being a home of a world renowned PaaS) we're looking into exactly that. A combination of Docker/LXC and OSv containerized deployments that you can 'bake' on the fly provide for some exciting opportunities. All of this, of course, comes at a price of breaking a traditional CM (Puppet, etc.) model of classical deployment. Anyway, if there's a subset of folks who are interested in the next. gen deployment approaches (especially for ephemeral Hadoop clusters) I'd love to organize a meetup/pow-wow on that subject. Thanks, Roman.
