Javascripti Unikernelide juurutamine rakenduses Vultr With Ops

Deploying Javascript Unikernels to Vultr

Unikernelid on ühe rakendusega operatsioonisüsteemid. Erinevalt üldotstarbelistest operatsioonisüsteemidest, nagu Linux, ei saa unikernelid sama serveri eksemplari mitut programmi käivitada. Unikernelid on üles ehitatud kõrgetasemeliste keelte kompileerimisega masinakujutisteks, mis jooksevad otse hüperviisoril või paljal metallil. See õpetus juurutab Vultrile lihtsa "tere maailm" JavaScripti veebiserveri.

Eeltingimused

1. UNIX-i sarnane operatsioonisüsteem, sealhulgas:

   • MacOS
   • Debian
   • Ubuntu
   • Fedora
   • Centos

2. Lepingulise Vultr objekt Storage asukohta.

   • Märkige üles oma Object Storage hostinimi. Esimest osa nimetatakse selles õpetuses tsooniks . Näiteks kui teie hostinimi on ewr1.vultrobjects.com, on teie tsoon ewr1 . See õpetus kasutab näitetsooni ewr1 .

3. An active account API key. Make sure your API key allows access from your IP address.

Install Ops

Download and install Ops:

curl https://ops.city/get.sh -sSfL | sh

You can also build it from source, available at https://github.com/nanovms/ops.

• You may need to reboot after installation for Ops to function properly.

Deploy Your First Unikernel

Create a working directory.

$ mkdir opstest
$ cd opstest

Create a Vultr Object Storage bucket. Use a unique name.

Create a file named config.json that specifies your Vultr Object Storage Bucket name and the zone ewr1.

{
  "CloudConfig" :{
    "Zone": "ewr1",
    "BucketName":"your_unique_bucket_name"
  }
}

Create file named hi.js. This simple application spawns a web server to listen on port 8083 and reply "Hello World".

var http = require('http');

console.log("I'm running on Vultr");

http.createServer(function (req, res) {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end('Hello World\n');
}).listen(8083, "0.0.0.0");
console.log('Server running!');

Export the following environment variables.

export TOKEN=my_api_token 
export VULTR_ACCESS=my_vultr_object_storage_access_key 
export VULTR_SECRET=my_vultr_object_storage_secret_key 

Create the Unikernel Image

Next steps:

• Bundle the node 13.6 package with the hi.js JavaScript application into a unikernel disk image.
• Upload the .img disk image to Vultr Object Storage.
• Import the disk image from Vultr Object Storage to a Vultr Cloud snapshot.

Run the following command to perform those steps in one action.

$ ops image create -t vultr -c config.json -z ewr1 -p node_v13.6.0 -a hi.js

List the image to find the image ID of the new snapshot.

$ ops image list -z ewr1 -t vultr

Use the image ID in the second column to create an instance from the snapshot.

$ ops instance create -z ewr1 -t vultr -i my_id

Verify the Vultr Cloud instance is running.

$ ops instance list -z ewr1 -t vultr

Navigate to your the URL for instance's IP address.

$ curl -XGET http://192.0.2.1:8083/
Hello World

You have deployed the "hello world" unikernel. More information about unikernels and Ops are available at: https://nanovms.gitbook.io/ops/vultr and https://ops.city/