Comment 55 for bug 1727355

using juju 1.25.13 (from ppa:juju/stable) in an updated trusty system this problem is still there, to solve it default-series can be set.

root@juju1:~# apt-cache policy distro-info-data
distro-info-data:
  Installed: 0.18ubuntu0.8
  Candidate: 0.18ubuntu0.8
  Version table:
 *** 0.18ubuntu0.8 0
        500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     0.18ubuntu0.7 0
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
     0.18 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
root@juju1:~# cat .juju/environments.yaml
default: maas

environments:
    maas:
        type: maas
        maas-server: 'http://1.2.3.4/MAAS/'
        maas-oauth: 'XXXX'
        bootstrap-timeout: 1800

root@juju1:~# juju bootstrap --constraints tags=virtual --upload-tools=true
Bootstrapping environment "maas"
Starting new instance for initial state server
Launching instance
WARNING no architecture was specified, acquiring an arbitrary node
Bootstrap failed, destroying environment
ERROR failed to bootstrap environment: cannot start bootstrap instance: gomaasapi: got error back from server: 400 BAD REQUEST ({"distro_series": ["'bionic' is not a valid distro_series. It should be one of: '', 'centos/centos66', 'centos/centos70', 'ubuntu/trusty', 'ubuntu/xenial', 'ubuntu/zesty', 'ubuntu/artful'."]})
root@juju1:~# vim .juju/environments.yaml
root@juju1:~# cat .juju/environments.yaml
default: maas

environments:
    maas:
        type: maas
        default-series: xenial
        maas-server: 'http://1.2.3.4/MAAS/'
        maas-oauth: 'XXXX'
        bootstrap-timeout: 1800
root@juju1:~# juju bootstrap --constraints tags=virtual
Bootstrapping environment "maas"
Starting new instance for initial state server
Launching instance
WARNING no architecture was specified, acquiring an arbitrary node
 - /MAAS/api/1.0/nodes/node-203ee4d8-42c9-11e5-9809-5254006803c2/
Installing Juju agent on bootstrap instance
Waiting for address
Attempting to connect to vm9.maas:22
...
Fetching tools: curl ...
Bootstrapping Juju machine agent
Starting Juju machine agent (jujud-machine-0)
Bootstrap agent installed
maas -> maas
Waiting for API to become available
Waiting for API to become available
Bootstrap complete