dockaless:Dockaless-无服务器Docker功能

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Dockaless-无服务器Docker功能 通过将Docker容器集成到无服务器平台或基于lambda的流中。 例子: 创建一个无服务器功能: 此功能可以按原样部署在AWS Lambda上。 var Dockaless = require ( "dockaless" ) var dals = new Dockaless ( ) exports . handler = dals . make_lambda ( "ubuntu" , [ "bash" , "-c" , "ls; ps" ] ) 对于本地测试,可以调用exports.handler({}, () => {}) 。 使用FFmpeg调整视频大小: 可利用此功能与本地函数,远程函数和API链接执行。 利用的最小的,基于Alpine-linux的。 const turtle = require ( "@iopipe/tu
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# Dockaless - Serverless Docker functions Integrate Docker containers into a serverless platform or a lambda-based flow via [turtle](https://github.com/iopipe/turtle). ## Examples: ### Create a serverless function: This function may be deployed on AWS Lambda as-is. ```javascript var Dockaless = require("dockaless") var dals = new Dockaless() exports.handler = dals.make_lambda("ubuntu", [ "bash", "-c", "ls; ps" ]) ``` For local testing, one can call ```exports.handler({}, () => {})```. ### Resizing videos with FFmpeg: This may be leveraged with the [turtle library](https://github.com/iopipe/turtle) to chain execution with local functions, remote functions, and APIs. Utilizes the minimal, Alpine-linux based [ffmpeg image from sjourdan](https://github.com/sjourdan/ffmpeg-docker). ```javascript const turtle = require("@iopipe/turtle")() const Dockaless = require("dockaless") const dals = new Dockaless() exports.handler = turtle.define( turtle.property("url"), turtle.fetch, dals.make_lambda("sjourdan/ffmpeg", [ "-i", "pipe:0", "-vf", "scale=320:240", "pipe:1" ]) ) ``` This example accepts a JSON document containing a "url" key. A video is fetched from this URL and scaled (resized) using ffmpeg. The video is piped back over the network to the caller, but a script could continue by saving this somewhere (such as S3) as in the following example. ### Parallelization This library combined with the IOpipe library can be used to easily build parallelized tasks requiring use of containerized applications. The following example is similar to the previous, but converts an array of videos, saves them to storage, and returns URLs to the uploaded content. ```javascript var AWS = require('aws-sdk') var turtle = require("@iopipe/turtle")() var Dockaless = require("dockaless") var crypto = require("crypto") var dals = new Dockaless() var s3 = new AWS.S3() function put_bucket(event, context) { s3.createBucket({Bucket: event.bucket}, function() { var params = {Bucket: event.bucket, Key: event.key, Body: event.body}; s3.putObject(params, function(err, data) { if (err) context.fail(err) else context.succeed(event) }); }); } exports.handler = turtle.define( turtle.property("urls"), turtle.map( turtle.fetch, dals.make_lambda("sjourdan/ffmpeg", [ "-i", "pipe:0", "-vf", "scale=320:240", "pipe:1" ]), (event, context) => { var video_hash = crypto.createHash('sha256').update(event).digest('hex') put_bucket({ bucket: "your_bucket", key: video_hash }, context) }, (event, callback) => { callback(s3.getSignedUrl('getObject', event)) } ) ) ``` # Reference ### class Dockaless(dockerode_opts) If dockerode options are not provided, local environment variables will be used. Typically, this will attempt to manage a local Docker daemon via its Unix socket. Current options are: * host * port * ca * cert * key See [dockerode documentation](https://github.com/apocas/dockerode) for more details. ### method Dockaless.make_lambda(image, cmd) Image is the name of a Docker image. Cmd are the arguments for the image, overriding CMD. Depending on if there is an entrypoint defined, this either passes arguments to the entrypoint, or executes the command inside the container. (This is standard Docker behavior) # License Apache 2.0
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