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| 1 | +#!/usr/bin/env node |
| 2 | + |
| 3 | +'use strict' |
| 4 | + |
| 5 | +if (process.env.AWS_SDK_LOAD_CONFIG == null) |
| 6 | + process.env.AWS_SDK_LOAD_CONFIG = '1' |
| 7 | + |
| 8 | +const AWS = require('aws-sdk') |
| 9 | +const { selectEC2Instance } = require('@jcoreio/aws-select-cli-prompts') |
| 10 | +const { spawn } = require('child_process') |
| 11 | +const os = require('os') |
| 12 | +const fs = require('fs') |
| 13 | +const path = require('path') |
| 14 | +const { promisify } = require('util') |
| 15 | + |
| 16 | +async function getAmiName(ec2, ImageId) { |
| 17 | + const { Images } = await ec2.describeImages({ ImageIds: [ImageId] }).promise() |
| 18 | + const name = Images && Images[0] && Images[0].Name |
| 19 | + if (!name) throw new Error(`failed to get name for image: ${ImageId}`) |
| 20 | + return name |
| 21 | +} |
| 22 | + |
| 23 | +function getUser(ami) { |
| 24 | + if (/ubuntu|nanostack/i.test(ami)) return 'ubuntu' |
| 25 | + if (/debian/i.test(ami)) return 'admin' |
| 26 | + if (/fedora/i.test(ami)) return 'fedora' |
| 27 | + if (/centos/i.test(ami)) return 'centos' |
| 28 | + if (/bitnami/i.test(ami)) return 'bitnami' |
| 29 | + if (/turnkey|omni/i.test(ami)) return 'root' |
| 30 | + return 'ec2-user' |
| 31 | +} |
| 32 | + |
| 33 | +function signalCode(signal) { |
| 34 | + switch (signal) { |
| 35 | + case 'SIGABRT': |
| 36 | + return 6 |
| 37 | + case 'SIGHUP': |
| 38 | + return 1 |
| 39 | + case 'SIGILL': |
| 40 | + return 4 |
| 41 | + case 'SIGINT': |
| 42 | + return 2 |
| 43 | + case 'SIGKILL': |
| 44 | + return 9 |
| 45 | + case 'SIGPIPE': |
| 46 | + return 13 |
| 47 | + case 'SIGQUIT': |
| 48 | + return 3 |
| 49 | + case 'SIGSEGV': |
| 50 | + return 11 |
| 51 | + case 'SIGTERM': |
| 52 | + return 15 |
| 53 | + case 'SIGTRAP': |
| 54 | + return 5 |
| 55 | + } |
| 56 | + return 0 |
| 57 | +} |
| 58 | + |
| 59 | +async function ec2ssh({ ec2 = new AWS.EC2() } = {}) { |
| 60 | + const instance = await selectEC2Instance({ ec2 }) |
| 61 | + |
| 62 | + const { ImageId, KeyName, PrivateDnsName, PublicDnsName } = instance |
| 63 | + let host = PrivateDnsName || PublicDnsName |
| 64 | + if (!host) |
| 65 | + throw new Error(`instance doesn't have a PrivateDnsName or PublicDnsName`) |
| 66 | + |
| 67 | + const user = ImageId ? getUser(await getAmiName(ec2, ImageId)) : null |
| 68 | + |
| 69 | + if (user) host = `${user}@${host}` |
| 70 | + |
| 71 | + const args = ['-t'] |
| 72 | + if (KeyName) { |
| 73 | + const identityFile = path.join(os.homedir(), '.ssh', `${KeyName}.pem`) |
| 74 | + try { |
| 75 | + await promisify(fs.stat)(identityFile) |
| 76 | + args.push('-i', identityFile) |
| 77 | + } catch (error) { |
| 78 | + // ignore |
| 79 | + } |
| 80 | + } |
| 81 | + |
| 82 | + args.push(host, ...process.argv.slice(2)) |
| 83 | + |
| 84 | + // eslint-disable-next-line no-console |
| 85 | + console.log('ssh', ...args) |
| 86 | + |
| 87 | + const child = spawn('ssh', args, { stdio: 'inherit' }) |
| 88 | + |
| 89 | + return await new Promise((resolve, reject) => { |
| 90 | + child.once('error', reject) |
| 91 | + child.once('close', (code, signal) => { |
| 92 | + resolve({ code, signal }) |
| 93 | + if (typeof code === 'number') process.exit(code) |
| 94 | + process.exit(signalCode(signal) + 127) |
| 95 | + }) |
| 96 | + }) |
| 97 | +} |
| 98 | + |
| 99 | +if (require.main === module) { |
| 100 | + ec2ssh().then( |
| 101 | + ({ code, signal }) => { |
| 102 | + if (typeof code === 'number') process.exit(code) |
| 103 | + process.exit(signalCode(signal) + 127) |
| 104 | + }, |
| 105 | + error => { |
| 106 | + // eslint-disable-next-line no-console |
| 107 | + console.error(error.message) |
| 108 | + process.exit(1) |
| 109 | + } |
| 110 | + ) |
| 111 | +} |
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