7.1.1 Maintenance for zCX 7.1 Software maintenance zCX itself is a component of z/OS, but the Docker images that are used within zCX are not  part of z/OS. As a result, different methods are required to update the software levels of zCX  versus updating the application software that runs within the containers. The application of service to zCX is a two-step process. In the first step, you install the  maintenance into the z/OS system. In the second step, the installed service has to be picked  up by the individual zCX instances. Install zCX service into the system zCX is a component of z/OS. So, fixes to zCX are delivered as PTFs and installed through  SMP/E, which is the component in z/OS that is most commonly used to install products and  fixes. You can and should order and install maintenance to zCX as part of your normal  maintenance procedures for z/OS as a whole. For more information on SMP/E, see the following this link in the IBM Knowledge Center: https://z-esrv01h.servicedpaor.de/zos/knowledgecenter/SSLTBW_2.4.0/com.ibm.zos. v2r4.gim/gim.htm The installation of PTFs with SMP/E does not activate this service for any zCX instance that is  provisioned. If you want to pick up the new service, it is not sufficient to restart an instance.  Instead, to activate the service you must run the upgrade workflow in z/OSMF for each zCX  instance separately. To run the upgrade workflow, you must create a new workflow in z/OSMF as described in  Chapter 4.8.2, “Select the zCX provisioning wo rkflow” on page 63. The file path for the  workflow definition file that upgrades a zCX instance is as follows: You can start the upgrade workflow without having to stop the instance in advance. But as last  steps of the workflow, you are required to stop and restart the instance. Step 1 of the workflow retrieves the instance information. Then, Step 2 checks for the upgrade  version and shows you the currently active software level and also the level that is activated  after this workflow runs, as shown in Figure 7-1 on page 145. 144  Getting started with z/OS Container Extensions Activate Service for zCX instances /usr/lpp/zcx_zos/workflows/upgrade.xml