kubectl 'exec' and 'cp' equivalent

[saada]

I would like to be able to exec some code on-demand. This is especially relevant for use-cases where I want to use pulumi to build kubernetes operators.

Proposed APIs

exec

// concat stream buffers into entire output strings
const pods = await deployment.getPods()
const {stdout, stderr} = await pods[0].exec("echo", ["hello", "world"])
console.log(stdout, stderr)

execStream

const pods = await deployment.getPods()
const {stdout, stderr} = pods[0].execStream("echo", ["hello", "world"])
stdout.pipe(process.stdout)
stderr.pipe(process.stderr)

cp

import fs from 'fs'
const pods = await deployment.getPods()
const readStream = fs.createReadStream('myfile.txt')
await pods[0].cp(readStream, "/tmp/myfile.txt")

// or from an inline string
import { Readable } from 'stream'
const inlineStream = new Readable()
const inlineFile = `
#!/bin/bash
echo hello world
`
inlineFile.split('\n').forEach(line => inlineStream.push(line))
inlineStream.push(null)
await pods[0].cp(inlineStream, "/tmp/myfile.txt")

[hausdorff]

I've been thinking a lot about this sort of thing too. I think it's super useful, but a key question for me is how this fits into the rest of Pulumi -- the rest of the SDK is highly declarative, and opening the door to imperative APIs that let you mutate existing resources is a huge leap, and one we should consider carefully before committing to. I'll be playing with it more over the next couple months, after which I expect to have stronger opinions.

In the meantime, the official Kubernetes JavaScript client offers these things out of the box. It should be feasible to use this stuff with Pulumi, which should bridge the gap in the short term.

[saada]

Thanks @hausdorff ... In the meantime, I created this: kubernetes-client/javascript#124

[yellowhat]

Are there any update in this?
Thanks

[lblackstone]

Adding this to the Kubernetes provider has not been prioritized, but I believe all of the original use cases can be covered with the use of the pulumi-command provider, or by using the Automation API.

[lblackstone]

We don't have any current plans to add this directly to pulumi-kubernetes. You can run the kubectl commands directly using pulumi-command, or use a k8s client library with Automation API to address these use cases.