Function Compute:Overview

Background

Container environment

Custom runtime (Debian 10) (in public preview)

• User permission: The function must be executed by the root user.
• Directory permissions: All directories are writable.
• The location of the code in the container: /code.

Custom Runtime

• User permissions
  • If functions are created at and after 00:00:00 December 1, 2021, the functions must be executed by the root user.
  • If functions are created before 00:00:00 December 1, 2021, the functions must be executed by a non-root user.
• Directory permissions
  • If functions are created at and after 00:00:00 December 1, 2021, all the directories are writable.
  • For the functions that are created before 00:00:00 December 1, 2021, data can be written to only the /tmp directory.
• The location of the code in the container: /code.

Information about the runtime environment

Custom runtime (Debian10)

The following programming languages are built into a custom runtime of the Debian 10 type. You can create custom runtimes of the following languages without the need to install third-party interpreters or configure layers:

• Python 2.7 (default Python version)
• Python 3.10.9

Custom Runtime

Use a non-built-in programming language

If you want to create a custom runtime by using a non-built-in language of the custom runtime, you must compress the parser or runtime of the language and your code file into a package and deploy the package in Function Compute. For example, if the runtime environment is Node.js 16, you must download the interpreter required for Node.js 16, compress the interpreter and your code file into a package, and then deploy the package in Function Compute. Perform the following steps:

1. Download the Linux-x64 edition of node to the directory of the code package.

   wget http://mirrors.nju.edu.cn/nodejs/v16.14.2/node-v16.14.2-linux-x64.tar.gz -O node-v16.14.2-linux-x64.tar.gz && tar -zxvf node-v16.14.2-linux-x64.tar.gz && rm -rf node-v16.14.2-linux-x64.tar.gz

2. Configure the startup command by which the custom runtime uses node.

   customRuntimeConfig:
     command:
       - /code/node-v16.14.2-linux-x64/bin/node
     args:
       - 'server.js'
   
   # You can also configure environment variables for the function: PATH=/code/node-v16.14.2-linux-x64/bin:/usr/local/bin/apache-maven/bin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/ruby/bin. 
   # After the configuration is complete, you can directly use the node to start the HTTP server. 

Install dependencies