generator-fedhipster/generators/kubernetes/index.js

Spring Boot + Angular/React in one handy generator

/**
 * Copyright 2013-2019 the original author or authors from the JHipster project.
 *
 * This file is part of the JHipster project, see https://www.jhipster.tech/
 * for more information.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
const chalk = require('chalk');
const fs = require('fs');
const prompts = require('./prompts');
const writeFiles = require('./files').writeFiles;
const BaseDockerGenerator = require('../generator-base-docker');
const { checkImages, generateJwtSecret, configureImageNames, setAppsFolderPaths } = require('../docker-base');
const { checkKubernetes, loadConfig, saveConfig, setupKubernetesConstants } = require('../kubernetes-base');
const statistics = require('../statistics');

module.exports = class extends BaseDockerGenerator {
    get initializing() {
        return {
            sayHello() {
                this.log(chalk.white(`${chalk.bold('⎈')} Welcome to the JHipster Kubernetes Generator ${chalk.bold('⎈')}`));
                this.log(chalk.white(`Files will be generated in folder: ${chalk.yellow(this.destinationRoot())}`));
            },
            ...super.initializing,
            checkKubernetes,
            loadConfig,
            setupKubernetesConstants
        };
    }

    get prompting() {
        return {
            askForApplicationType: prompts.askForApplicationType,
            askForPath: prompts.askForPath,
            askForApps: prompts.askForApps,
            askForMonitoring: prompts.askForMonitoring,
            askForClustersMode: prompts.askForClustersMode,
            askForServiceDiscovery: prompts.askForServiceDiscovery,
            askForAdminPassword: prompts.askForAdminPassword,
            askForKubernetesNamespace: prompts.askForKubernetesNamespace,
            askForDockerRepositoryName: prompts.askForDockerRepositoryName,
            askForDockerPushCommand: prompts.askForDockerPushCommand,
            askForIstioSupport: prompts.askForIstioSupport,
            askForKubernetesServiceType: prompts.askForKubernetesServiceType,
            askForIngressDomain: prompts.askForIngressDomain
        };
    }

    get configuring() {
        return {
            insight() {
                statistics.sendSubGenEvent('generator', 'kubernetes');
            },

            checkImages,
            generateJwtSecret,
            configureImageNames,
            setAppsFolderPaths,

            setPostPromptProp() {
                this.appConfigs.forEach(element => {
                    element.clusteredDb ? (element.dbPeerCount = 3) : (element.dbPeerCount = 1);
                    if (element.messageBroker === 'kafka') {
                        this.useKafka = true;
                    }
                });
            },
            saveConfig
        };
    }

    get writing() {
        return writeFiles();
    }

    end() {
        if (this.warning) {
            this.log(`\n${chalk.yellow.bold('WARNING!')} Kubernetes configuration generated, but no Jib cache found`);
            this.log('If you forgot to generate the Docker image for this application, please run:');
            this.log(this.warningMessage);
        } else {
            this.log(`\n${chalk.bold.green('Kubernetes configuration successfully generated!')}`);
        }

        this.log(
            `${chalk.yellow.bold(
                'WARNING!'
            )} You will need to push your image to a registry. If you have not done so, use the following commands to tag and push the images:`
        );
        for (let i = 0; i < this.appsFolders.length; i++) {
            const originalImageName = this.appConfigs[i].baseName.toLowerCase();
            const targetImageName = this.appConfigs[i].targetImageName;
            if (originalImageName !== targetImageName) {
                this.log(`  ${chalk.cyan(`docker image tag ${originalImageName} ${targetImageName}`)}`);
            }
            this.log(`  ${chalk.cyan(`${this.dockerPushCommand} ${targetImageName}`)}`);
        }

        this.log('\nYou can deploy all your apps by running the following script:');
        this.log(`  ${chalk.cyan('bash kubectl-apply.sh')}`);
        if (this.gatewayNb + this.monolithicNb >= 1) {
            const namespaceSuffix = this.kubernetesNamespace === 'default' ? '' : ` -n ${this.kubernetesNamespace}`;
            this.log("\nUse these commands to find your application's IP addresses:");
            for (let i = 0; i < this.appsFolders.length; i++) {
                if (this.appConfigs[i].applicationType === 'gateway' || this.appConfigs[i].applicationType === 'monolith') {
                    this.log(`  ${chalk.cyan(`kubectl get svc ${this.appConfigs[i].baseName.toLowerCase()}${namespaceSuffix}`)}`);
                }
            }
            this.log();
        }
        // Make the apply script executable
        try {
            fs.chmodSync('kubectl-apply.sh', '755');
        } catch (err) {
            this.log(
                `${chalk.yellow.bold(
                    'WARNING!'
                )}Failed to make 'kubectl-apply.sh' executable, you may need to run 'chmod +x kubectl-apply.sh'`
            );
        }
    }
};