[ANN] juju-core 1.9.3 has been released

[David Cheney]

juju-core 1.9.3
===============

A new experimental release of Juju,  juju-core 1.9.3,  is now available 
for testing. This release of the Go port of Juju and should be 
considered experimental.

Getting Juju
------------

juju-core 1.9.3 is available from the Gophers PPA

https://code.launchpad.net/~gophers/+archive/go

Optional configuration changes
------------------------------

  * In this release of juju-core, the public-bucket configuration item 
has acquired a sensible default and can be removed from any EC2 
environment configuration.
  * A new configuration item, public-bucket-region, has been added to 
allow non us-east-1 EC2 environments to discover the correct S3 endpoint 
when downloading their toolsets. This configuration item has a usable 
default and is not expected to needed under normal circumstances.

New and Notable
---------------

This release includes several improvements

  * juju-core now users a direct TLS authenticated connection between 
clients, agents and the state server. The juju cli tool will 
automatically generate and manage the CA and subordinate certificates 
when bootstrapping an environment. This replaces the previous SSH tunnel 
mechanism and is both faster and more reliable.
  * Support for bootstrapping into non us-east-1 environments has 
improved, however please refer to the following section for caveats.

Known bugs and limitations
--------------------------

As this is an early release of Juju in Go there are a number of features 
which are still to be implemented. A non exhaustive list of known issues 
is as follows.

  * EC2 is the only supported provider.
  * Raring series environments are not supported.
  * default-series is not respected, the series of the environment will 
match the series of the machine which issued the juju bootstrap command. 
#1074064
  * Most types of relations are supported, but they are not displayed in 
juju status. #1073966
  * The ssl-hostname-verification configuration key is not valid in an 
environments.yaml configuration. The EC2 provider does perform ssl host 
verification by virtue of only talking to https endpoints. As a 
temporary measure, please remove this key from your environments.yaml. 
#1074025
  * us-east-1 is the most reliable region to deploy into. Due to subtle 
differences in the EC2 regions, juju bootstrap may fail. This has 
improved in 1.9.3, but is still problematic. The current workaround is 
to use us-east-1, retry your juju deploy command, or change your control 
bucket after destroying your previous environment. #1042107
  * The juju-core package currently cannot be installed in parallel with 
juju 0.5/0.6 due to conflicting ownership of /usr/bin/juju (and others). 
This may be mitigated in the future with alternatives.
  * destroy-service is not yet implemented. As a workaround you can 
remove all the units assigned to a service. This is issue #1027878.
  * terminate-machine is not yet implemented. #1073976
  * Constraints are not yet implemented. #1027873
  * Subordinate charms are not yet implemented.

We encourage everyone to subscribe the mailing list at 
juju-dev at lists.canonical.com, or join us on #juju-dev on freenode.

Dave Cheney
On behalf of the Juju team
https://launchpad.net/juju-core