[jira] [Commented] (AMBARI-5885) Usability: check that hostnames are resolveable on each host

["Jonathan Hurley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMBARI-5885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14008162#comment-14008162 ] 

Jonathan Hurley commented on AMBARI-5885:
-----------------------------------------

Implemented via custom actions, it was determined that only IP address forward lookup is required for this Usability check.

{noformat}
{
  "RequestInfo": {
    "action": "check_host", 
    "context": "Check host", 
    "parameters": {
      "check_execute_list": "host_resolution_check", 
      "hosts": "c6401.ambari.apache.org, c6402.ambari.apache.org, c6403.ambari.apache.org, foobar, !!!", 
      "threshold": "20"
    }
  }, 
  "Requests/resource_filters": [
    {
      "hosts": "c6401.ambari.apache.org,c6402.ambari.apache.org"
    }
  ]
}
{noformat}

The response is found in the "structured_out" of the task for the request. The structured_out is a key-value pair of all of the requested custom actions. In this case, there is only 1 action, so there is 1 key/value pair in the structured_out response.

{noformat}
{ 
'host_resolution_check': 
  {
  'failures': [
    {'type': 'FORWARD_LOOKUP', 'host': 'foobar', 'cause': [-3, 'Temporary failure in name resolution']}, 
    {'type': 'FORWARD_LOOKUP', 'host': '!!!', 'cause': [-3, 'Temporary failure in name resolution']} ],  
  'failed_count': 2, 
  'success_count': 3, 
  'exit_code': '0'
  'message': 'There were 2 host(s) that could not resolve to an IP address.', 
  }
}
{noformat}

> Usability: check that hostnames are resolveable on each host
> ------------------------------------------------------------
>
>                 Key: AMBARI-5885
>                 URL: https://issues.apache.org/jira/browse/AMBARI-5885
>             Project: Ambari
>          Issue Type: Bug
>    Affects Versions: 1.5.0
>            Reporter: Jonathan Hurley
>            Assignee: Jonathan Hurley
>             Fix For: 1.6.1
>
>
> Check on each host that other hostnames are resolvable and reachable, and check reverse lookup



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