@enspirit/emb/dist/src/cli/commands/kubernetes/logs.js

A replacement for our Makefile-for-monorepos

import { Log } from '@kubernetes/client-node';
import { Args, Flags } from '@oclif/core';
import { PassThrough } from 'node:stream';
import { KubernetesCommand } from '../../index.js';
import { GetDeploymentPodsOperation } from '../../../kubernetes/operations/GetDeploymentPodsOperation.js';
export default class KubernetesLogs extends KubernetesCommand {
    static aliases = ['logs'];
    static description = 'Follow kubernetes logs.';
    static enableJsonFlag = false;
    static examples = ['<%= config.bin %> <%= command.id %>'];
    static flags = {
        follow: Flags.boolean({
            name: 'follow',
            char: 'f',
            allowNo: true,
            description: 'Follow log output',
            default: true,
        }),
    };
    static args = {
        component: Args.string({
            name: 'component',
            description: 'The component you want to see the logs of',
            required: true,
        }),
    };
    async run() {
        const { flags, args } = await this.parse(KubernetesLogs);
        const { monorepo, kubernetes } = this.context;
        // Check the component name is valid (would raise otherwise)
        monorepo.component(args.component);
        const pods = await monorepo.run(new GetDeploymentPodsOperation(), {
            namespace: flags.namespace,
            deployment: args.component,
        });
        if (pods.length === 0) {
            throw new Error(`No running pod found for component ${args.component}`);
        }
        const k8sLogs = new Log(kubernetes.config);
        const transform = new PassThrough();
        transform.on('data', (chunk) => {
            process.stdout.write(chunk);
        });
        const pod = pods[0];
        const container = pod.spec.containers[0];
        await k8sLogs.log(flags.namespace, pod.metadata.name, container.name, transform, {
            follow: flags.follow,
            tailLines: 50,
            pretty: false,
            timestamps: true,
        });
    }
}