following yaml + output... I will try to repro it outside so we can actively poke it -- but we don't hit this error very often so I am not hopeful that I will be successful every time.

oil_deployment:
  overrides:
    openstack-origin: cloud:trusty-juno
    source: cloud:trusty-updates/juno
  relations:
  - - keystone
    - mysql
  - - nova-cloud-controller
    - glance
  - - nova-cloud-controller
    - keystone
  - - nova-cloud-controller
    - mysql
  - - nova-cloud-controller
    - rabbitmq-server
  - - glance
    - keystone
  - - glance
    - mysql
  - - cinder
    - glance
  - - cinder
    - keystone
  - - cinder
    - nova-cloud-controller
  - - cinder
    - mysql
  - - cinder
    - rabbitmq-server
  - - openstack-dashboard
    - keystone
  - - heat
    - mysql
  - - heat
    - rabbitmq-server
  - - heat
    - keystone
  - - ceilometer:identity-service
    - keystone:identity-service
  - - ceilometer
    - rabbitmq-server
  - - ceilometer
    - mongodb
  - - ceilometer-agent
    - ceilometer
  - - neutron-gateway
    - mysql
  - - neutron-gateway
    - nova-cloud-controller
  - - nova-compute:amqp
    - rabbitmq-server:amqp
  - - nova-compute
    - nova-cloud-controller
  - - nova-compute
    - glance
  - - neutron-api
    - mysql
  - - neutron-api
    - rabbitmq-server
  - - neutron-api
    - nova-cloud-controller
  - - neutron-api
    - neutron-openvswitch
  - - neutron-api
    - keystone
  - - neutron-openvswitch
    - nova-compute
  - - neutron-openvswitch
    - rabbitmq-server
  - - swift-proxy
    - keystone
  - - swift-proxy
    - swift-storage
  - - ceilometer-agent
    - nova-compute
  - - swift-proxy
    - glance
  - - ceph
    - cinder
  - - ceph
    - nova-compute
  series: trusty
  services:
    ceilometer:
      branch: lp:charms/ceilometer
      to:
      - lxc:nova-compute=0
    ceilometer-agent:
      branch: lp:charms/ceilometer-agent
    ceph:
      branch: lp:~lutostag/charms/trusty/ceph/fix-six-bug
      num_units: 3
      options:
        fsid: 6547bd3e-1397-11e2-82e5-53567c8d32dc
        monitor-count: 3
        monitor-secret: AQCXrnZQwI7KGBAAiPofmKEXKxu5bUzoYLVkbQ==
        osd-devices: /dev/sdc /dev/sdd /srv/ceph
        osd-reformat: 'yes'
    cinder:
      branch: lp:~openstack-charmers/charms/trusty/cinder/next
      options:
        block-device: None
        glance-api-version: 2
        remove-missing: true
    glance:
      branch: lp:~openstack-charmers/charms/trusty/glance/next
      to:
      - lxc:nova-compute=1
    heat:
      branch: lp:~openstack-charmers/charms/trusty/heat/next
      to:
      - lxc:nova-compute=2
    keystone:
      branch: lp:~gnuoy/charms/trusty/keystone/next-1385105
      options:
        admin-password: openstack
        admin-token: ubuntutesting
      to:
      - lxc:cinder=0
    mongodb:
      branch: lp:charms/mongodb
      to:
      - lxc:neutron-gateway=0
    mysql:
      branch: lp:~lutostag/charms/trusty/mysql/fix-six-bug
      to:
      - lxc:nova-cloud-controller=0
    neutron-api:
      branch: lp:charms/neutron-api
      options:
        neutron-security-groups: true
      to:
      - lxc:ceph=0
    neutron-gateway:
      branch: lp:charms/quantum-gateway
      options:
        plugin: nvp
    neutron-openvswitch:
      branch: lp:charms/neutron-openvswitch
    nova-cloud-controller:
      branch: lp:~openstack-charmers/charms/trusty/nova-cloud-controller/next
      options:
        network-manager: Neutron
        quantum-security-groups: 'yes'
    nova-compute:
      branch: lp:~lutostag/charms/trusty/nova-compute/oil
      num_units: 3
      options:
        virt-type: lxc
    openstack-dashboard:
      branch: lp:charms/openstack-dashboard
      to:
      - lxc:ceph=1
    rabbitmq-server:
      branch: lp:charms/rabbitmq-server
      to:
      - lxc:ceph=2
    swift-proxy:
      branch: lp:~lmic/charms/trusty/swift-proxy/fix-six-bug
      options:
        replicas: 3
        swift-hash: fdfef9d4-8b06-11e2-8ac0-531c923c8fae
        zone-assignment: auto
      to:
      - lxc:nova-compute=0
    swift-storage:
      branch: lp:~openstack-charmers/charms/trusty/swift-storage/next
      num_units: 3
      options:
        block-device: /srv/swift.img|10G
        overwrite: 'true'
        zone: 1
      to:
      - nova-compute=0
      - nova-compute=1
      - nova-compute=2
  total_machines: 10
2015-02-12 14:11:33,472 [INFO] oil_ci.deploy.oil_deployer: Deploying from /tmp/tmpEjeZxC
2015-02-12 14:11:33,472 [INFO] oil_ci.juju.juju_deployer: Updating juju config from oil-ci.conf/[juju]
2015-02-12 14:11:33,473 [DEBUG] oil_ci.juju.juju_deployer: juju.no_local_mods = False
2015-02-12 14:11:33,474 [DEBUG] oil_ci.juju.juju_deployer: juju.update_charms = False
2015-02-12 14:11:33,474 [DEBUG] oil_ci.juju.juju_deployer: Converted option overrides to NoneType
2015-02-12 14:11:33,475 [DEBUG] oil_ci.juju.juju_deployer: juju.overrides = None
2015-02-12 14:11:33,476 [DEBUG] oil_ci.juju.juju_deployer: juju.branch_only = False
2015-02-12 14:11:33,477 [DEBUG] oil_ci.juju.juju_deployer: juju.timeout = 3600
2015-02-12 14:11:33,477 [DEBUG] oil_ci.juju.juju_deployer: juju.watch = True
2015-02-12 14:11:33,478 [DEBUG] oil_ci.juju.juju_deployer: juju.verbose = True
2015-02-12 14:11:33,479 [DEBUG] oil_ci.juju.juju_deployer: juju.debug = True
2015-02-12 14:11:33,479 [DEBUG] oil_ci.juju.juju_deployer: juju.rel_wait = 600
2015-02-12 14:11:33,480 [DEBUG] oil_ci.juju.juju_deployer: juju.bootstrap = False
2015-02-12 14:11:33,480 [DEBUG] oil_ci.juju.juju_deployer: Converted option retry_count to NoneType
2015-02-12 14:11:33,481 [DEBUG] oil_ci.juju.juju_deployer: juju.retry_count = None
2015-02-12 14:11:33,483 [DEBUG] oil_ci.juju.juju_deployer: juju.ignore_errors = False
2015-02-12 14:11:33,483 [DEBUG] oil_ci.juju.juju_deployer: juju.deploy_delay = 0
2015-02-12 14:11:33,484 [DEBUG] oil_ci.juju.juju_deployer: juju.log_level = DEBUG
2015-02-12 14:11:33,484 [DEBUG] oil_ci.juju.juju_deployer: juju.maas_base_tag = hw-ok
2015-02-12 14:11:33,485 [DEBUG] oil_ci.juju.juju_deployer: juju.juju_deployer_config_dir = /etc/oil-ci/deployer
2015-02-12 14:11:33,486 [DEBUG] oil_ci.juju.juju_deployer: juju.os_tenant_credentials_file = /etc/oil-ci/os-tenant.conf
2015-02-12 14:11:33,486 [DEBUG] oil_ci.juju.juju_deployer: juju.placement_policy = density
2015-02-12 14:11:33,500 [DEBUG] oil_ci.juju.juju_deployer: Creating loggers for deployer: ['', 'deploy.cli', 'deploy.env', 'deployer', 'deploy.deploy', 'deploy.charm', 'deploy.importer']
2015-02-12 14:11:33,832 [DEBUG] deployer.import: Getting charms...
2015-02-12 14:11:33,833 [DEBUG] deployer.charm:  Branching charm lp:charms/mongodb @ trusty/mongodb
2015-02-12 14:11:36,621 [DEBUG] deployer.charm:  Branching charm lp:~openstack-charmers/charms/trusty/nova-cloud-controller/next @ trusty/nova-cloud-controller
2015-02-12 14:11:39,474 [DEBUG] deployer.charm:  Branching charm lp:~lutostag/charms/trusty/ceph/fix-six-bug @ trusty/ceph
2015-02-12 14:11:42,372 [DEBUG] deployer.charm:  Branching charm lp:~lmic/charms/trusty/swift-proxy/fix-six-bug @ trusty/swift-proxy
2015-02-12 14:11:45,182 [DEBUG] deployer.charm:  Branching charm lp:~openstack-charmers/charms/trusty/heat/next @ trusty/heat
2015-02-12 14:11:48,858 [DEBUG] deployer.charm:  Branching charm lp:charms/neutron-openvswitch @ trusty/neutron-openvswitch
2015-02-12 14:11:51,846 [DEBUG] deployer.charm:  Branching charm lp:~lutostag/charms/trusty/mysql/fix-six-bug @ trusty/mysql
2015-02-12 14:11:55,130 [DEBUG] deployer.charm:  Branching charm lp:charms/neutron-api @ trusty/neutron-api
2015-02-12 14:11:58,029 [DEBUG] deployer.charm:  Branching charm lp:~openstack-charmers/charms/trusty/glance/next @ trusty/glance
2015-02-12 14:12:01,411 [DEBUG] deployer.charm:  Branching charm lp:charms/ceilometer @ trusty/ceilometer
2015-02-12 14:12:05,671 [DEBUG] deployer.charm:  Branching charm lp:~lutostag/charms/trusty/nova-compute/oil @ trusty/nova-compute
2015-02-12 14:12:09,531 [DEBUG] deployer.charm:  Branching charm lp:charms/ceilometer-agent @ trusty/ceilometer-agent
2015-02-12 14:12:13,403 [DEBUG] deployer.charm:  Branching charm lp:~openstack-charmers/charms/trusty/swift-storage/next @ trusty/swift-storage
2015-02-12 14:12:18,092 [DEBUG] deployer.charm:  Branching charm lp:charms/rabbitmq-server @ trusty/rabbitmq-server
2015-02-12 14:12:22,168 [DEBUG] deployer.charm:  Branching charm lp:~gnuoy/charms/trusty/keystone/next-1385105 @ trusty/keystone
2015-02-12 14:12:25,358 [DEBUG] deployer.charm:  Branching charm lp:charms/openstack-dashboard @ trusty/openstack-dashboard
2015-02-12 14:12:28,842 [DEBUG] deployer.charm:  Branching charm lp:~openstack-charmers/charms/trusty/cinder/next @ trusty/cinder
2015-02-12 14:12:32,370 [DEBUG] deployer.charm:  Branching charm lp:charms/quantum-gateway @ trusty/neutron-gateway
2015-02-12 14:12:35,623 [DEBUG] deployer.deploy: Resolving configuration
2015-02-12 14:12:35,688 [DEBUG] deployer.env: Connecting to environment...
2015-02-12 14:12:37,027 [DEBUG] deployer.env: Connected to environment
2015-02-12 14:12:37,029 [INFO] deployer.import: Deploying services...
2015-02-12 14:12:37,030 [DEBUG] deployer.import: <deployer.env.go.GoEnvironment object at 0x2ef8910>
2015-02-12 14:12:38,406 [INFO] deployer.import:  Deploying service ceilometer-agent using local:trusty/ceilometer-agent
2015-02-12 14:12:45,001 [INFO] deployer.import:  Deploying service ceph using local:trusty/ceph
2015-02-12 14:12:59,682 [INFO] deployer.import:  Deploying service cinder using local:trusty/cinder
2015-02-12 14:13:08,992 [INFO] deployer.import:  Deploying service neutron-gateway using local:trusty/quantum-gateway
2015-02-12 14:13:18,362 [INFO] deployer.import:  Deploying service neutron-openvswitch using local:trusty/neutron-openvswitch
2015-02-12 14:13:24,551 [INFO] deployer.import:  Deploying service nova-cloud-controller using local:trusty/nova-cloud-controller
2015-02-12 14:13:33,636 [INFO] deployer.import:  Deploying service nova-compute using local:trusty/nova-compute
2015-02-12 14:13:47,787 [INFO] deployer.import:  Deploying service ceilometer using local:trusty/ceilometer
2015-02-12 14:13:47,788 [DEBUG] deployer.import:  Refetching status for placement deploys
2015-02-12 14:13:54,184 [ERROR] deployer.deploy: Service ceilometer to be deployed with non existant service nova-compute
2015-02-12 14:14:03,897 [INFO] deployer.import:  Deploying service glance using local:trusty/glance
2015-02-12 14:14:03,900 [ERROR] deployer.deploy: Service glance to be deployed with non existant service nova-compute
2015-02-12 14:14:13,202 [INFO] deployer.import:  Deploying service heat using local:trusty/heat
2015-02-12 14:14:13,205 [ERROR] deployer.deploy: Service heat to be deployed with non existant service nova-compute
2015-02-12 14:14:22,570 [INFO] deployer.import:  Deploying service keystone using local:trusty/keystone
2015-02-12 14:14:22,573 [ERROR] deployer.deploy: Service keystone to be deployed with non existant service cinder
2015-02-12 14:14:31,517 [INFO] deployer.import:  Deploying service mongodb using local:trusty/mongodb
2015-02-12 14:14:31,520 [ERROR] deployer.deploy: Service mongodb to be deployed with non existant service neutron-gateway
2015-02-12 14:14:40,398 [INFO] deployer.import:  Deploying service mysql using local:trusty/mysql
2015-02-12 14:14:40,403 [ERROR] deployer.deploy: Service mysql to be deployed with non existant service nova-cloud-controller
2015-02-12 14:14:49,438 [INFO] deployer.import:  Deploying service neutron-api using local:trusty/neutron-api
2015-02-12 14:14:49,442 [ERROR] deployer.deploy: Service neutron-api to be deployed with non existant service ceph
2015-02-12 14:14:59,152 [INFO] deployer.import:  Deploying service openstack-dashboard using local:trusty/openstack-dashboard
2015-02-12 14:14:59,154 [ERROR] deployer.deploy: Service openstack-dashboard to be deployed with non existant service ceph
2015-02-12 14:15:08,318 [INFO] deployer.import:  Deploying service rabbitmq-server using local:trusty/rabbitmq-server
2015-02-12 14:15:08,321 [ERROR] deployer.deploy: Service rabbitmq-server to be deployed with non existant service ceph
2015-02-12 14:15:17,582 [INFO] deployer.import:  Deploying service swift-proxy using local:trusty/swift-proxy
2015-02-12 14:15:17,585 [ERROR] deployer.deploy: Service swift-proxy to be deployed with non existant service nova-compute
2015-02-12 14:15:26,180 [INFO] deployer.import:  Deploying service swift-storage using local:trusty/swift-storage
2015-02-12 14:15:26,182 [ERROR] deployer.deploy: Service swift-storage to be deployed with non existant service nova-compute
2015-02-12 14:15:39,832 [DEBUG] deployer.import: Adding units...
2015-02-12 14:15:41,065 [ERROR] oil_ci.deploy.oil_deployer: Deployment failed: 'ceilometer-agent'
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/oil_ci/deploy/oil_deployer.py", line 140, in deploy
    debug=True, verbose=True)
  File "/usr/lib/python2.7/dist-packages/oil_ci/juju/juju_deployer.py", line 85, in run_deployer
    importer.Importer(env, deploy, options=opts).run()
  File "/usr/lib/python2.7/dist-packages/deployer/action/importer.py", line 202, in run
    self.add_units()
  File "/usr/lib/python2.7/dist-packages/deployer/action/importer.py", line 26, in add_units
    cur_units = len(env_status['services'][svc.name].get('units', ()))
KeyError: 'ceilometer-agent'