tree 679b865633dcfb4994b4c23ee458f923b0542e0a
parent aa53d49d0914619c4f02d84da390ab8ad44d29c7
author Dennis Dmitriev <ddmitriev@mirantis.com> 1528372673 +0300
committer Dennis Dmitriev <ddmitriev@mirantis.com> 1528482230 +0300

Bootstrap with opened SSH on nodes

master_config.sh script for cfg01-day01 image requires working
SSH service to perform 'ssh-keyscan' to prepare Jenkins.

1. To wait the end of the bootstrap process with opened SSH,
  two flags added:

  /is_cloud_init_started - file on the node, indicates that the
  bootstrap process should wait for the flag /is_cloud_init_finished

  /is_cloud_init_finished - file on the node, indicates that the
  bootstrap process can be finished successfully

2. Backward compatibility:
  - if the SSH service is available, but /is_cloud_init_started not
    found, then the bootstrap process will be finished as successful.
  - if any of (AuthenticationException, BadAuthenticationType)
    exceptions caused, the bootstrap process will be finished as
    successful.

3. For each node, at least 2 successful (in terms of #1 or #2 above)
   SSH checks should pass before the bootstrap is finished.

   That allows to avoid intermediate allowness of ssh service during
   bootstrap using the second check.

   It is necessary for cases when ssh service is started by the
   preparation process but is stopped for a while until the
   cloud-init script is finished or the node is rebooted.

Change-Id: I82fb10efa8a67d080b725a66a3185fc845d2b1a0