There is already code for 'juju upgrade-charm'. I know there are plans for it to allow "canary" upgrades (upgrade one, make sure everything is still stable, upgrade the next batch, etc). I think the functionality is very basic at this moment, but it is where I would look. John =:-> <div class="gmail_quote">On May 24, 2013 2:09 PM, <<a href="mailto:franck.dehay@orange.com">franck.dehay@orange.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div lang="FR" link="blue" vlink="purple"><div>Hello, Sorry, I don’t have any answer to offer but I would really like one as well. Our ops teams need a nice way to propagate changes to each node (rolling restart for unstable java stack, cache clearing on web services, apache graceful restart…) Or is the answer: once the api is there, you can code it yourself? Franck Dehay Orange</div><pre>_________________________________________________________________________________________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, France Telecom - Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. This message and its attachments may contain confidential or privileged information that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and delete this message and its attachments. As emails may be altered, France Telecom - Orange is not liable for messages that have been modified, changed or falsified. Thank you. </pre></div> -- Juju mailing list <a href="mailto:Juju@lists.ubuntu.com">Juju@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/juju" target="_blank">https://lists.ubuntu.com/mailman/listinfo/juju</a> </blockquote></div>