[AMBARI-22883] Create hosts per operating system count summary

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: ambari-server
• Labels: pull-request-available
• Assignee: Scott Duan
• Reporter: Scott Duan
• Created: 30/Jan/18 19:44
• Updated: 05/Mar/18 15:44
• Resolved: 22/Feb/18 20:20

Description

In the install wizard, after host registration, we need to know the number of hosts running each possible operating system.

Example request:

 GET
http://localhost:8080/api/v1/hosts?format=summary

Example response:

{    "operating_systems": [        "redhat6": 75,        "debian7": 100
    ]
}

Note that if there are zero hosts for an operating system type, then it is not included in the array.

This structure allows us to add additional summary information as siblings to "operating_systems" in the future.

Issue Links

• links to: GitHub Pull Request #285
• links to: GitHub Pull Request #458
• links to: GitHub Pull Request #516
• links to: GitHub Pull Request #539