Ticket 03 – Determine Last Application Outage
=============================================

Title: “When was the last outage for this new web server?”
-----------------------------------------------------------

Ticket Description
~~~~~~~~~~~~~~~~~~

  The team is evaluating a newer version of the web server
  running on node *10.1.20.201*. This node is a member of the
  *web_servers_pool* pool on *WestRegion-bigip-01*.

  Before moving forward with broader deployment, the team
  wants to understand the stability of this node.

  How long has it been since this application experienced an outage?

Context
~~~~~~~

  **Device Name:** WestRegion-bigip-01

  **Pool Name:** web_servers_pool

  **Pool Member:** 10.1.20.201:80

Tasks
~~~~~

  Navigate to:

    **Dashboards >> BIG-IP Device >> Device Pools**

  .. image:: ../images/image5.png
      :width: 500px
      :alt: Device Pools Dashboard navigation

  From the Device dropdown, select:

    **WestRegion-bigip-01**

  From the Pool dropdown, select:

    **web_servers_pool**

  Locate the panel:

    **Pool Member Request Rate**

  Click the "Expand panel" button on top right of that panel

  Use the Time Range dropdown in the upper-right corner of the dashboard
  to review historical availability data.

  Try adjusting the range to broader views such as:

    - Last 1 hour (focus on this)
    - Last 24 hours
    - Last 7 Days
    - Last 30 Days

  Identify:

    - Does the pool member request have any anomalies?
    - Does there appear to be any one pool member taking more requests than another?
    - In the graph key, de-select all members EXCEPT member *10.1.20.201:80*

Deliverables
~~~~~~~~~~~~

  Briefly answer the following focusing on *10.1.20.201:80*:

    - What is the highest req p/s that you've observed?

  Review the following for additional information and trends (navigate back to summary page):

    - Observe date and time of the last outage (if any)
    - Approximate duration of the outage
    - Time elapsed since the outage
    - Any observations about stability trends

Hints
~~~~~

  - Hover over points in graph to see event day and time
  - Try expanding the time range (Last 24 Hours, 7 Days, 30 Days).
  - Look for state transitions from isAvailable to unavailable.
  - Zoom in on the graph if necessary to see shorter outages.

This concludes Ticket 3.

Go to `Ticket 04 - Review Connection Count Standard Deviation <../lab04/lab04.html>`_

Go to `Overview <../overview.html>`_