Using SCF and CLB to Quickly Deploy Web Service

Last updated: 2021-08-26 15:29:11

    Overview

    This document describes how to use CLB as the access entry of a serverless service and work with SCF to quickly deploy a web service. In this way, you can enjoy the strengths of Serverless services, such as low cost and OPS-free usage, and smoothly migrate your application to the cloud.

    Directions

    Creating VPC

    Log in to the VPC console to create a VPC and subnet as instructed in Building Up an IPv4 VPC.

    Note

    The VPC should be deployed in the same region as the CLB instance and SCF webpage. This document uses Shanghai as an example.

    Creating CLB instance

    1. Log in to the CLB console to create a CLB instance as instructed in Getting Started with CLB.
      This document uses Shanghai as an example. Select the VPC created in the previous step.
    2. After successful creation, find the target CLB instance on the Instance Management page and configure a listener for it as instructed in Configuring an HTTP Listener.
      This document uses the listener clb-scf-web and listening protocol port number 81 as an example.

    Creating SCF function

    1. Log in to the SCF console and select Function Service on the left sidebar.
    2. At the top of the Function Service page, select the Shanghai region and click Create to enter the function creating page.
      Set the following parameter information and click Next as shown below:
      • Creation Method: select Template.
      • Fuzzy Search: enter "Web static page hosting" and "Python3.6" and search.
        Click Learn More in the template to view relevant information in the Template Details pop-up window, which can be downloaded.
    3. In Basic Configuration, enter the function name and select the function region.
      • Function Name: enter clb-scf-web for example.
      • Region: select the region of the CLB instance, such as Shanghai.
    4. In Trigger Configuration, select Custom Creation and use the trigger to bind CLB to SCF.
      • Triggered Version: select Default Traffic.
      • Trigger Method: select CLB Trigger.
      • Instance ID: select the CLB instance created in the previous step, such as clb_serverless_web.
      • Listener: select the configured listener. In this example, the listener listens on port 81.
      • Domain Name/Host: select Create Rule.
      • Add Domain Name: enter the VIP of the CLB instance in the added domain name.
        Note

        The VIP is the IP address through which CLB provides service to clients.

      • URL Path: enter the URL path of the website starting with /, such as /demo.
    5. Click Complete to redirect to the Deployment Log page and view the function and trigger creation progress.

    Testing CLB entry

    1. Log in to the SCF console and select Function Service on the left sidebar.
    2. At the top of the Function Service page, click the created function clb-scf-web.
    3. On the function details page, select Trigger Management.
    4. On the Trigger Management page, get the trigger access path and view the webpage.