Getting Started

Log in to the Huawei Cloud console, search for FunctionGraph, and go to the function list.

Figure 1 Huawei Cloud console
View the function created for this solution.

Figure 2 Created function
Go to the function details page, and click Test. In the displayed dialog box, select blank-template, and click Create to create a test event.

Figure 3 Function details page

Figure 4 Configuring a test event
On the function details page, click Test to invoke the function to reinstall or change the OS. If information similar to the following is returned, the execution is successful.

Figure 5 Invoking a function

Figure 6 Execution successful
On the Monitoring tab, view the request logs about OS reinstallation.

Figure 7 Request logs
To reinstall or change the OS of other ECSs, go to the function details page, choose Configuration > Environment Variables, enter variable values by referring to Table 1, and click Save. Then invoke the function again by referring to Step 4.

Figure 8 Setting environment variables