VNC console doesn't connect to vcenter instances after reboot DC

[okosse]

Step for reproduce:
1. Create dualhypervisor environment with HTTPS/TLS for Horizon enable
2. Via Horizon create an instance in vcenter availability zone
3. Shutdown or reboot DC node
4. Connect to vnc console

Expected result: Pass

Actual result: Failed to connect to server (code: 1006)

I reproduced all steps with nova availability zone and got pass.
I reproduced all steps with HTTPS/TLS for Horizon disable and got pass.

-------------------------iso version------------------------
api: '1.0'
astute_sha: 6c5b73f93e24cc781c809db9159927655ced5012
auth_required: true
build_id: '298'
build_number: '298'
feature_groups:
- mirantis
fuel-agent_sha: 082a47bf014002e515001be05f99040437281a2d
fuel-library_sha: 0623b4daad438ceeb5dc41b10cdd3011795fff7e
fuel-nailgun-agent_sha: d7027952870a35db8dc52f185bb1158cdd3d1ebd
fuel-ostf_sha: 1f08e6e71021179b9881a824d9c999957fcc7045
fuelmain_sha: 6b83d6a6a75bf7bca3177fcf63b2eebbf1ad0a85
nailgun_sha: d590b26dbb09785b8a8b3651b0ef69746fcf9991
openstack_version: 2015.1.0-7.0
production: docker
python-fuelclient_sha: 486bde57cda1badb68f915f66c61b544108606f3
release: '7.0'
release_versions:
  2015.1.0-7.0:
    VERSION:
      api: '1.0'
      astute_sha: 6c5b73f93e24cc781c809db9159927655ced5012
      build_id: '298'
      build_number: '298'
      feature_groups:
      - mirantis
      fuel-agent_sha: 082a47bf014002e515001be05f99040437281a2d
      fuel-library_sha: 0623b4daad438ceeb5dc41b10cdd3011795fff7e
      fuel-nailgun-agent_sha: d7027952870a35db8dc52f185bb1158cdd3d1ebd
      fuel-ostf_sha: 1f08e6e71021179b9881a824d9c999957fcc7045
      fuelmain_sha: 6b83d6a6a75bf7bca3177fcf63b2eebbf1ad0a85
      nailgun_sha: d590b26dbb09785b8a8b3651b0ef69746fcf9991
      openstack_version: 2015.1.0-7.0
      production: docker
      python-fuelclient_sha: 486bde57cda1badb68f915f66c61b544108606f3
      release: '7.0'

[Alexander Arzhanov (aarzhanov)]

Can't reproduce on:

VERSION:
  feature_groups:
    - mirantis
  production: "docker"
  release: "8.0"
  openstack_version: "2015.1.0-8.0"
  api: "1.0"
  build_number: "275"
  build_id: "275"
  fuel-nailgun_sha: "5ff92bf8e121390ccdfb53cd0c4a1503fb731f5a"
  python-fuelclient_sha: "19b89d9109d7ddffdc0eb4c4c0979485f3ca2146"
  fuel-agent_sha: "6356e90686efcc0f5aa1c6bfc108688975ce9650"
  fuel-nailgun-agent_sha: "a33a58d378c117c0f509b0e7badc6f0910364154"
  astute_sha: "48fd58676debcc85951db68df6d77c22daa55e52"
  fuel-library_sha: "f267761dff972295bc32b42934a13568a2d1725d"
  fuel-ostf_sha: "23b7ae2a1a57de5a3e1861ffb7805394ca339cc2"
  fuel-mirror_sha: "c66309976db831a4081e5e0064028d7c67014b2f"
  fuelmenu_sha: "761685b566af981479e7e0f3c3a5eede5a40400d"
  shotgun_sha: "a0bd06508067935f2ae9be2523ed0d1717b995ce"
  network-checker_sha: "a3534f8885246afb15609c54f91d3b23d599a5b1"
  fuel-upgrade_sha: "1e894e26d4e1423a9b0d66abd6a79505f4175ff6"
  fuelmain_sha: "95b4232a4faf0eb151fcc9aefca833392afa6cdf"