Lab 3.2: Upgrade and scale-up our SSG
-------------------------------------

In the previous lab, we have updated our ``Cloud Environment``. We can now replace 
the instances running in our ``SSG`` **SSGClass2**. 

In the ``BIG-IQ`` UI, go to *Applications* > *Environments* > *Service Scaling Groups* and 
click on your ``SSG`` **SSGClass2**.

Click on the *Configuration* tab, and then *Devices*. This is where you can review 
the ``SSG`` devices that has been deployed. 

.. image:: ../pictures/module3/img_module3_lab2_1.png
 :align: center
 :scale: 50%

|

.. warning:: we recommend to change one device at a time for such process

Select the device called **SSGClass2-1.f5demo.local** and click on the *Replace* button. 

.. image:: ../pictures/module3/img_module3_lab2_2.png
 :align: center
 :scale: 50%

|

As soon as you do this, you'll trigger the replacement of this device by another using 
our updated *Cloud Environment*. You'll see a yellow alert at the top that will look like 
this

.. image:: ../pictures/module3/img_module3_lab2_3.png
 :align: center
 :scale: 50%

|

.. note:: the replacement process is not restricted by the *Maximum Devices(s) Required* 
    limit you have defined in your ``SSG``. It you were already at the maximum capacity of your 
    ``SSG`` the replacement would still happen

You can monitor the deployment of the new instance : 

* via the log files *orchestrator.log* and *restjavad.0.log* on ``BIG-IQ``
* via the alerts available in the ``BIG-IQ`` UI
* monitor the vCenter interface (here you can also check that it has 4 vCPUs instead of 2)

.. image:: ../pictures/module3/img_module3_lab2_4.png
 :align: center
 :scale: 50%

|

After some time, you'll see the new device being discovered by ``BIG-IQ``: 

.. image:: ../pictures/module3/img_module3_lab2_5.png
 :align: center
 :scale: 50%

|

.. note:: During this process, you're still able to deploy applications on top of this 
    ``SSG``

The device will be fully discovered: 

.. image:: ../pictures/module3/img_module3_lab2_6.png
 :align: center
 :scale: 50%

|

Here ``BIG-IQ`` will push the applications on this ``SSG`` device. Once it's done, it will 
remove the device **SSGClass2-1.f5demo.local** and the yellow banner at the top will 
disappear

.. image:: ../pictures/module3/img_module3_lab2_7.png
 :align: center
 :scale: 50%

|

This is the process to do on each device that needs to be replaced. We would need to repeat 
this task on **SSGClass2-2.f5demo.local** to finalize our upgrade/scale-up of our ``SSG``. 
This won't be needed for this lab. 

As you have seen, the upgrade and scale-up process are identical and can be done at the 
same time if needed