Generate a Kubernetes ReplicationController

create-k8s-config.js

// See https://gist.github.com/eschwartz/4f16fcb963954d433753ffe32ce5d5ca
const ReplicationController = require('./ReplicationController');
const fs = require('fs-extra');
// See https://gist.github.com/eschwartz/310a7d9938b60eaf49c8d56c1ccfb759
const loadS3Env = require('./loadS3Env');
const path = require('path');
const Cli = require('admiral-cli');
const co = require('co');

function main() {
  return co(function*() {

    const cliParams = parseCliParams();
    const params = require(cliParams.paramsFile);

    // Load .env file from S3
    const env = yield loadS3Env(params.envFile);

    // Create the ReplicationController
    const rc = ReplicationController(Object.assign({ env }, params));

    // Write files
    fs.outputJsonSync(path.join(cliParams.outDir, 'ReplicationController.json'), rc);
  });
}

main()
  .then(() => {
    console.log('Done.');
    process.exit(0);
  })
  .catch(err => {
    console.error(err);
    process.exit(1);
  });

function parseCliParams() {
  const cli = new Cli()
    .option({
      name: 'paramsFile',
      description: 'Location of params.json file',
      type: 'path',
      shortFlag: '-c',
      longFlag: '--config',
      length: 1,
      required: true
    })
    .option({
      name: 'outDir',
      description: 'Where to output generated k8s config file',
      type: 'path',
      shortFlag: '-o',
      longFlag: '--output',
      length: 1,
      required: false
    });

  return cli.parse();
}

create-k8s-config.ts

// See https://gist.github.com/eschwartz/4f16fcb963954d433753ffe32ce5d5ca
import {IOptions as IRcOptions, default as ReplicationController} from './ReplicationController';
import * as fs from 'fs-extra';
// See https://gist.github.com/eschwartz/310a7d9938b60eaf49c8d56c1ccfb759
import loadS3Env from './loadS3Env';
import * as path from 'path';
const Cli = <any>require('admiral-cli');

async function main() {
  const cliParams = parseCliParams();
  const params = <IDeployParams>require(cliParams.paramsFile);
  
  // Load .env file from S3
  const env = await loadS3Env(params.envFile);
  
  // Create the ReplicationController
  const rc = ReplicationController(Object.assign({ env }, params));

  // Write files
  fs.outputJsonSync(path.join(cliParams.outDir, 'ReplicationController.json'), rc);
}

main()
  .then(() => {
    console.log('Done.');
    process.exit(0);
  })
  .catch(err => {
    console.error(err);
    process.exit(1);
  });

interface IDeployParams extends IRcOptions {
  envFile: string;
}

interface ICliParams {
  paramsFile: string;
  outDir: string;
}
function parseCliParams():ICliParams {
  const cli = new Cli()
    .option({
      name: 'paramsFile',
      description: 'Location of params.json file',
      type: 'path',
      shortFlag: '-c',
      longFlag: '--config',
      length: 1,
      required: true
    })
    .option({
      name: 'outDir',
      description: 'Where to output generated k8s config file',
      type: 'path',
      shortFlag: '-o',
      longFlag: '--output',
      length: 1,
      required: false
    });

  return <ICliParams>cli.parse();
}

params.example.json

{
  "name": "my-app",
  "version": "v1.0.0",
  "image": "myorg/my-app:1.0.0",
  "replicas": 1,
  "envFile": "s3://path/to/env/file",
  "imagePullPolicy": "IfNotPresent",
  "volumes": [{
    "name": "data-mount",
    "server": "us-east-1a.XXXX.efs.us-east-1.amazonaws.com",
    "path": "/",
    "mountPath": "/mnt/data"
  }]
}