basic.js

/* eslint no-console:0 */
//
// Demonstrate some of the basics.
//
const Client = require('kubernetes-client').Client

const deploymentManifest = require('./nginx-deployment.json')

async function main () {
  try {
    const client = new Client({ version: '1.13' })

    //
    // Get all the Namespaces.
    //
    const namespaces = await client.api.v1.namespaces.get()
    console.log('Namespaces: ', namespaces)

    //
    // Create a new Deployment.
    //
    const create = await client.apis.apps.v1.namespaces('default').deployments.post({ body: deploymentManifest })
    console.log('Create: ', create)

    //
    // Fetch the Deployment we just created.
    //
    const deployment = await client.apis.apps.v1.namespaces('default').deployments(deploymentManifest.metadata.name).get()
    console.log('Deployment: ', deployment)

    //
    // Change the Deployment Replica count to 10
    //

    const replica = {
      spec: {
        replicas: 10
      }
    }

    const replicaModify = await client.apis.apps.v1.namespaces('default').deployments(deploymentManifest.metadata.name).patch({ body: replica })
    console.log('Replica Modification: ', replicaModify)

    //
    // Modify the image tag
    //
    const newImage = {
      spec: {
        template: {
          spec: {
            containers: [{
              name: 'nginx',
              image: 'nginx:1.8.1'
            }]
          }
        }
      }
    }
    const imageSet = await client.apis.apps.v1.namespaces('default').deployments(deploymentManifest.metadata.name).patch({ body: newImage })
    console.log('New Image: ', imageSet)

    //
    // Remove the Deployment we created.
    //
    const removed = await client.apis.apps.v1.namespaces('default').deployments(deploymentManifest.metadata.name).delete()
    console.log('Removed: ', removed)
  } catch (err) {
    console.error('Error: ', err)
  }
}

main()