kubectl apply -f functionality

[silasbw]

From @therynamo:

"Another nicety would be being able to do something like kubectl apply -f, programatically. So instead of seeing, Error: deployment "insert_deployment_name_here" already exists, it would just overwrite with the new config. However, I may have yet again misread the docs."

[cfellin1]

I'm interested in looking into this @silasbw.

[cfellin1]

RE apply, this seems to get the job done:

const deploymentManifest = require('./nginx-deployment.json')
client.apis.apps.v1.namespaces('default').deployments('nginx-deployment').put({ body: deploymentManifest });

Though please correct me if there's a requirement I'm missing here.

[cfellin1]

Though I suppose it has the downside of working exclusively for replace and not working for create in the way apply does.

[silasbw]

Yeah, what about adding a pattern to examples/? Something like:

try {
  await client.apis.apps.v1.namespaces.post(...);
} catch (err) {
  if (err.code !== 409) throw err;
  await client.apis.apps.v1.namespaces.put(...);
}

I'm reluctant to include it in the kubernetes-client library because it would be introducing a "high-level wrapper" to what is currently a pretty straightforward REST API wrapper.