docker-exec-api.js

#!/usr/bin/env node

import { request } from 'http';

// Replace containerID below.
const containerID = 'abcdefg1234567890hijklmnop1234567890qrstuv1234567890wxyz12345678';

function startExec(execID) {
  let options = {
    socketPath: '/var/run/docker.sock',
    method: 'POST',
    path: `/exec/${execID}/start`,
    headers: { "Content-Type": "application/json" },
  };

  const req = request(options, (res) => {
    let data = '';

    res.on('data', d => {
      data += d.toString();
    });

    res.on('end', () => {
      console.log(`${res.statusCode}: ${data}`);
    });
  });

  req.on('error', err => {
    console.error(err);
  });

  req.write('{ "Detach": false, "Tty": true }');
  req.end();
}

function createExec(containerID) {
  let options = {
    socketPath: '/var/run/docker.sock',
    method: 'POST',
    path: `/containers/${containerID}/exec`,
    headers: { "Content-Type": "application/json" },
  };

  const req = request(options, (res) => {
    let data = '';

    res.on('data', d => {
      data += d.toString();
    });

    res.on('end', () => {
      console.log(`${res.statusCode}: ${data}`);
      let execID = JSON.parse(data).Id;
      startExec(execID);
    });
  });

  req.on('error', err => {
    console.error(err);
  });

  req.write('{ "Tty": true, "AttachStdin": false, "AttachStdout": true, "AttachStderr": true, "Cmd": [ "date", "--iso-8601=seconds" ] }');
  req.end();
}

createExec(containerID);