Dear Andrew, what about private clouds such as maas? Patrizio
Il giorno mer 24 ma 2017 alle 03:38 Andrew Wilkins < andrew.wilk...@canonical.com> ha scritto: > Hi folks, > > One of the things we're working on for the 2.3 release (not 2.2!) is > persistent storage. What this means is the ability to detach storage from a > unit, and reattach it to another unit keeping the storage contents intact. > We would like to get some feedback before this all gets set in stone. > > With the changes, removing an application unit will detach storage rather > than destroy it as Juju currently does. The storage will then be available > for attaching to another unit using "juju attach-storage <unit> <storage>" > or to a new application unit using "juju deploy <charm> --attach-storage > <storage>"; or for removal using "juju remove-storage <storage>". > > For example, I can deploy postgresql on AWS with EBS storage. If I remove > the postgresql application, I can add another and attach the storage to it: > > $ juju deploy postgresql --storage pgdata=100G,ebs > Located charm "cs:postgresql-148". > Deploying charm "cs:postgresql-148". > (wait for postgresql/0 to become active) > > $ juju remove-application postgresql > removing application postgresql > - will detach storage pgdata/0 > (wait for postgresql/0 and machine 0 to be removed) > > $ juju deploy postgresql postgresql2 --attach-storage pgdata/0 --to > zone=<same-zone-as-postgresql/0> > Located charm "cs:postgresql-148". > Deploying charm "cs:postgresql-148". > (wait for postgresql2/0 to become active) > > If you like, you can confirm for yourself that the data is persisted by > logging into the first machine and runing "sudo -u postgres psql", creating > some data, and then checking that it is still there from the second machine. > > (The --to zone=... is required due to a limitation that we will remove by > the time 2.3 is released. EBS volumes and EC2 instances must be created in > the same AZ, and that's not automatic yet. This is fixed by > https://github.com/juju/juju/pull/7378 which, at the time of writing this > email, has not yet been merged.) > > If you have any interest in these changes, please help us make them great > by testing out this early release: > > $ sudo snap install --channel=edge --classic juju-axw > $ /snap/bin/juju-axw.juju bootstrap ... > > The new/updated commands are: > - juju attach-storage <unit> <storage> > - juju detach-storage <storage> > - juju remove-storage <storage> > - juju deploy <charm> --attach-storage <storage> > > (We'll also be adding --attach-storage to the "juju add-unit" command > soon.) > > Thank you! > > Cheers, > Andrew > -- > Juju mailing list > Juju@lists.ubuntu.com > Modify settings or unsubscribe at: > https://lists.ubuntu.com/mailman/listinfo/juju > -- Patrizio Bassi www.patriziobassi.it http://piazzadelpopolo.patriziobassi.it
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