OpenWhisk PHP动作创建失败：kind 'php:7.3'不在支持集合中

Looks like your OpenWhisk deployment doesn’t support the PHP 7.3 runtime natively—hence the error listing only Node.js-related kinds, blackbox, and sequence as valid options. Let’s walk through the solutions based on your setup:

Why This Happens #

OpenWhisk relies on pre-configured runtime "kinds" to execute actions. If your instance (whether self-hosted or a managed service) hasn’t been set up with the PHP runtime, it won’t recognize php:7.3 as a valid kind.

Solution 1: Add PHP Runtime to Self-Hosted OpenWhisk #

If you’re running your own OpenWhisk instance (e.g., locally with Docker), you can add the PHP 7.3 runtime manually:

• Grab the official PHP runtime image: apache/openwhisk-runtime-php:7.3
• Deploy this runtime to your OpenWhisk cluster. For most setups, this involves updating the platform’s runtime catalog or using wskadmin commands to register the new kind.
• Once registered, re-run your original command:

  wsk action create helloPHP hello.php --kind php:7.3
  

Solution 2: Use Blackbox Mode (For Managed Services or Missing Runtime) #

If you’re using a managed OpenWhisk service that doesn’t offer PHP runtimes, or can’t modify your self-hosted instance, use the blackbox kind to package your PHP code in a custom Docker image:

Step 1: Prepare Your PHP Code #

Update your hello.php to handle input/output properly for blackbox mode (OpenWhisk sends parameters via stdin and expects JSON output to stdout):

<?php
function main(array $args): array {
    $name = $args["name"] ?? "stranger";
    $greeting = "Hello $name!";
    return ["greeting" => $greeting];
}

// Read input from stdin, execute main, output JSON result
$input = json_decode(file_get_contents('php://stdin'), true);
$result = main($input);
echo json_encode($result);
?>

Step 2: Create a Dockerfile #

Create a Dockerfile to build a PHP 7.3 environment with your script:

FROM php:7.3-cli

WORKDIR /action
COPY hello.php .

CMD ["php", "hello.php"]

Step 3: Build and Push the Image #

Build the image and push it to a Docker registry (like Docker Hub):

docker build -t your-username/php-hello:7.3 .
docker push your-username/php-hello:7.3

Step 4: Create the OpenWhisk Action #

Use the blackbox kind to create your action with the custom image:

wsk action create helloPHP --docker your-username/php-hello:7.3

Verify the Action #

Test your action to make sure it works:

wsk action invoke helloPHP --param name "Rakesh" --result

You should get back:

{
    "greeting": "Hello Rakesh!"
}

内容的提问来源于stack exchange，提问作者Rakesh Jesadiya