With moving to docker, the persistent data item really adds a complexity level, but it just means we need to segregate our static and user data for deployment. The main volumes we would need to create would include the following: * cobbler conf and generated profiles * postgresql database * log store
Ephemeral data that can be lost includes: rabbitmq cache local container logs (rsyslog for anything we want to keep) Items not clear about persistent volumes: * Fuel Puppet manifests (so a user can make persistent changes) * RPM/DEB repos (same as above) I understand that Fuel upgrades is meant to accommodate upgrades and rollbacks, so we have to add in a versioning convention to persistent volumes and a way to perform these migrations. On Mon, Feb 10, 2014 at 4:26 PM, Evgeniy L <[email protected]> wrote: > Hi, > > > As many of you may already know we started design/implementation of master > node upgrade feature. Here you can read the design document. > > > So, it's just status update of this feature. > > We want to use docker as containers management tool. > > > Here is Docker's pros and cons > > Pros > > + > http://stackoverflow.com/questions/17989306/what-does-docker-add-to-just-plain-lxc > > + rest API (it will be very useful in case of plugins, when we'll be able to > setup new container from inside another container) > > + lxc requires us to design our own build process and networking > > + docker has a standard dockerfile format and tools to build images and > store them in git and do version management > > Cons > > - additional complexity > > - non-persistent containers, it can be solved with volumes > > http://www.tech-d.net/2013/12/16/persistent-volumes-with-docker-container-as-volume-pattern/ > > http://www.offermann.us/2013/12/tiny-docker-pieces-loosely-joined.html > > http://crosbymichael.com/advanced-docker-volumes.html > > - regarding non-persistent containers will be a lot of questions like "I > patched nailgun but when I rerun container all changes are gone" (can be > solved with documentation) > > > Let us know if you have any ideas or questions. > > Thanks > > -- > Mailing list: https://launchpad.net/~fuel-dev > Post to : [email protected] > Unsubscribe : https://launchpad.net/~fuel-dev > More help : https://help.launchpad.net/ListHelp > -- Mailing list: https://launchpad.net/~fuel-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~fuel-dev More help : https://help.launchpad.net/ListHelp
