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# aws.py - Automation code for Amazon Web Services
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#
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# Copyright 2019 Gregory Szorc <gregory.szorc@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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# no-check-code because Python 3 native.
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import contextlib
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import copy
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import hashlib
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import json
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import os
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import pathlib
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import subprocess
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import time
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import boto3
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import botocore.exceptions
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from .linux import BOOTSTRAP_DEBIAN
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from .ssh import (
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exec_command as ssh_exec_command,
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wait_for_ssh,
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)
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from .winrm import (
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run_powershell,
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wait_for_winrm,
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)
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SOURCE_ROOT = pathlib.Path(
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os.path.abspath(__file__)
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).parent.parent.parent.parent
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INSTALL_WINDOWS_DEPENDENCIES = (
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SOURCE_ROOT / 'contrib' / 'install-windows-dependencies.ps1'
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)
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INSTANCE_TYPES_WITH_STORAGE = {
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'c5d',
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'd2',
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'h1',
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'i3',
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'm5ad',
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'm5d',
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'r5d',
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'r5ad',
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'x1',
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'z1d',
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}
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AMAZON_ACCOUNT_ID = '801119661308'
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DEBIAN_ACCOUNT_ID = '379101102735'
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DEBIAN_ACCOUNT_ID_2 = '136693071363'
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UBUNTU_ACCOUNT_ID = '099720109477'
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WINDOWS_BASE_IMAGE_NAME = 'Windows_Server-2019-English-Full-Base-2019.07.12'
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KEY_PAIRS = {
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'automation',
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}
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SECURITY_GROUPS = {
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'linux-dev-1': {
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'description': 'Mercurial Linux instances that perform build/test automation',
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'ingress': [
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{
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'FromPort': 22,
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'ToPort': 22,
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'IpProtocol': 'tcp',
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'IpRanges': [
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{
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'CidrIp': '0.0.0.0/0',
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'Description': 'SSH from entire Internet',
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},
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],
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},
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],
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},
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'windows-dev-1': {
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'description': 'Mercurial Windows instances that perform build automation',
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'ingress': [
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{
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'FromPort': 22,
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'ToPort': 22,
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'IpProtocol': 'tcp',
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'IpRanges': [
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{
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'CidrIp': '0.0.0.0/0',
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'Description': 'SSH from entire Internet',
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},
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],
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},
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{
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'FromPort': 3389,
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'ToPort': 3389,
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'IpProtocol': 'tcp',
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'IpRanges': [
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{
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'CidrIp': '0.0.0.0/0',
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'Description': 'RDP from entire Internet',
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},
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],
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},
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{
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'FromPort': 5985,
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'ToPort': 5986,
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'IpProtocol': 'tcp',
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'IpRanges': [
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{
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'CidrIp': '0.0.0.0/0',
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'Description': 'PowerShell Remoting (Windows Remote Management)',
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},
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],
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},
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],
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},
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}
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IAM_ROLES = {
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'ephemeral-ec2-role-1': {
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'description': 'Mercurial temporary EC2 instances',
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'policy_arns': [
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'arn:aws:iam::aws:policy/service-role/AmazonEC2RoleforSSM',
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],
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},
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}
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ASSUME_ROLE_POLICY_DOCUMENT = '''
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{
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"Version": "2012-10-17",
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"Statement": [
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{
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"Effect": "Allow",
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"Principal": {
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"Service": "ec2.amazonaws.com"
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},
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"Action": "sts:AssumeRole"
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}
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]
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}
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'''.strip()
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IAM_INSTANCE_PROFILES = {
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'ephemeral-ec2-1': {'roles': ['ephemeral-ec2-role-1',],}
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}
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# User Data for Windows EC2 instance. Mainly used to set the password
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# and configure WinRM.
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# Inspired by the User Data script used by Packer
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# (from https://www.packer.io/intro/getting-started/build-image.html).
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WINDOWS_USER_DATA = r'''
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<powershell>
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# TODO enable this once we figure out what is failing.
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#$ErrorActionPreference = "stop"
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# Set administrator password
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net user Administrator "%s"
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wmic useraccount where "name='Administrator'" set PasswordExpires=FALSE
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# First, make sure WinRM can't be connected to
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netsh advfirewall firewall set rule name="Windows Remote Management (HTTP-In)" new enable=yes action=block
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# Delete any existing WinRM listeners
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winrm delete winrm/config/listener?Address=*+Transport=HTTP 2>$Null
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winrm delete winrm/config/listener?Address=*+Transport=HTTPS 2>$Null
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# Create a new WinRM listener and configure
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winrm create winrm/config/listener?Address=*+Transport=HTTP
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winrm set winrm/config/winrs '@{MaxMemoryPerShellMB="0"}'
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winrm set winrm/config '@{MaxTimeoutms="7200000"}'
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winrm set winrm/config/service '@{AllowUnencrypted="true"}'
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winrm set winrm/config/service '@{MaxConcurrentOperationsPerUser="12000"}'
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winrm set winrm/config/service/auth '@{Basic="true"}'
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winrm set winrm/config/client/auth '@{Basic="true"}'
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# Configure UAC to allow privilege elevation in remote shells
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$Key = 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System'
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$Setting = 'LocalAccountTokenFilterPolicy'
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Set-ItemProperty -Path $Key -Name $Setting -Value 1 -Force
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# Configure and restart the WinRM Service; Enable the required firewall exception
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Stop-Service -Name WinRM
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Set-Service -Name WinRM -StartupType Automatic
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netsh advfirewall firewall set rule name="Windows Remote Management (HTTP-In)" new action=allow localip=any remoteip=any
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Start-Service -Name WinRM
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# Disable firewall on private network interfaces so prompts don't appear.
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Set-NetFirewallProfile -Name private -Enabled false
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</powershell>
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'''.lstrip()
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WINDOWS_BOOTSTRAP_POWERSHELL = '''
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Write-Output "installing PowerShell dependencies"
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Install-PackageProvider -Name NuGet -MinimumVersion 2.8.5.201 -Force
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Set-PSRepository -Name PSGallery -InstallationPolicy Trusted
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Install-Module -Name OpenSSHUtils -RequiredVersion 0.0.2.0
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Write-Output "installing OpenSSL server"
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Add-WindowsCapability -Online -Name OpenSSH.Server~~~~0.0.1.0
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# Various tools will attempt to use older versions of .NET. So we enable
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# the feature that provides them so it doesn't have to be auto-enabled
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# later.
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Write-Output "enabling .NET Framework feature"
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Install-WindowsFeature -Name Net-Framework-Core
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'''
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class AWSConnection:
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"""Manages the state of a connection with AWS."""
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def __init__(self, automation, region: str, ensure_ec2_state: bool = True):
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self.automation = automation
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self.local_state_path = automation.state_path
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self.prefix = 'hg-'
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self.session = boto3.session.Session(region_name=region)
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self.ec2client = self.session.client('ec2')
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self.ec2resource = self.session.resource('ec2')
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self.iamclient = self.session.client('iam')
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self.iamresource = self.session.resource('iam')
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self.security_groups = {}
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if ensure_ec2_state:
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ensure_key_pairs(automation.state_path, self.ec2resource)
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self.security_groups = ensure_security_groups(self.ec2resource)
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ensure_iam_state(self.iamclient, self.iamresource)
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def key_pair_path_private(self, name):
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"""Path to a key pair private key file."""
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return self.local_state_path / 'keys' / ('keypair-%s' % name)
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def key_pair_path_public(self, name):
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return self.local_state_path / 'keys' / ('keypair-%s.pub' % name)
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def rsa_key_fingerprint(p: pathlib.Path):
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"""Compute the fingerprint of an RSA private key."""
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# TODO use rsa package.
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res = subprocess.run(
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[
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'openssl',
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'pkcs8',
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'-in',
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str(p),
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'-nocrypt',
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'-topk8',
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'-outform',
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'DER',
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],
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capture_output=True,
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check=True,
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)
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sha1 = hashlib.sha1(res.stdout).hexdigest()
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return ':'.join(a + b for a, b in zip(sha1[::2], sha1[1::2]))
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def ensure_key_pairs(state_path: pathlib.Path, ec2resource, prefix='hg-'):
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remote_existing = {}
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for kpi in ec2resource.key_pairs.all():
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if kpi.name.startswith(prefix):
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remote_existing[kpi.name[len(prefix) :]] = kpi.key_fingerprint
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# Validate that we have these keys locally.
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key_path = state_path / 'keys'
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key_path.mkdir(exist_ok=True, mode=0o700)
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def remove_remote(name):
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print('deleting key pair %s' % name)
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key = ec2resource.KeyPair(name)
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key.delete()
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def remove_local(name):
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pub_full = key_path / ('keypair-%s.pub' % name)
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priv_full = key_path / ('keypair-%s' % name)
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print('removing %s' % pub_full)
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pub_full.unlink()
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print('removing %s' % priv_full)
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priv_full.unlink()
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local_existing = {}
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for f in sorted(os.listdir(key_path)):
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if not f.startswith('keypair-') or not f.endswith('.pub'):
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continue
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name = f[len('keypair-') : -len('.pub')]
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pub_full = key_path / f
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priv_full = key_path / ('keypair-%s' % name)
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with open(pub_full, 'r', encoding='ascii') as fh:
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data = fh.read()
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if not data.startswith('ssh-rsa '):
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print(
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'unexpected format for key pair file: %s; removing' % pub_full
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)
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pub_full.unlink()
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priv_full.unlink()
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continue
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local_existing[name] = rsa_key_fingerprint(priv_full)
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for name in sorted(set(remote_existing) | set(local_existing)):
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if name not in local_existing:
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actual = '%s%s' % (prefix, name)
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print('remote key %s does not exist locally' % name)
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remove_remote(actual)
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del remote_existing[name]
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elif name not in remote_existing:
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print('local key %s does not exist remotely' % name)
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remove_local(name)
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del local_existing[name]
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elif remote_existing[name] != local_existing[name]:
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print(
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'key fingerprint mismatch for %s; '
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'removing from local and remote' % name
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)
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remove_local(name)
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remove_remote('%s%s' % (prefix, name))
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del local_existing[name]
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del remote_existing[name]
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missing = KEY_PAIRS - set(remote_existing)
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for name in sorted(missing):
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actual = '%s%s' % (prefix, name)
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print('creating key pair %s' % actual)
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priv_full = key_path / ('keypair-%s' % name)
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pub_full = key_path / ('keypair-%s.pub' % name)
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kp = ec2resource.create_key_pair(KeyName=actual)
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with priv_full.open('w', encoding='ascii') as fh:
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fh.write(kp.key_material)
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fh.write('\n')
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priv_full.chmod(0o0600)
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# SSH public key can be extracted via `ssh-keygen`.
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with pub_full.open('w', encoding='ascii') as fh:
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subprocess.run(
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['ssh-keygen', '-y', '-f', str(priv_full)],
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stdout=fh,
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check=True,
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)
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pub_full.chmod(0o0600)
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def delete_instance_profile(profile):
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for role in profile.roles:
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print(
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'removing role %s from instance profile %s'
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% (role.name, profile.name)
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)
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profile.remove_role(RoleName=role.name)
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print('deleting instance profile %s' % profile.name)
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profile.delete()
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def ensure_iam_state(iamclient, iamresource, prefix='hg-'):
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"""Ensure IAM state is in sync with our canonical definition."""
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remote_profiles = {}
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for profile in iamresource.instance_profiles.all():
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if profile.name.startswith(prefix):
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remote_profiles[profile.name[len(prefix) :]] = profile
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for name in sorted(set(remote_profiles) - set(IAM_INSTANCE_PROFILES)):
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delete_instance_profile(remote_profiles[name])
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del remote_profiles[name]
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remote_roles = {}
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for role in iamresource.roles.all():
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if role.name.startswith(prefix):
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remote_roles[role.name[len(prefix) :]] = role
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for name in sorted(set(remote_roles) - set(IAM_ROLES)):
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role = remote_roles[name]
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print('removing role %s' % role.name)
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role.delete()
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del remote_roles[name]
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# We've purged remote state that doesn't belong. Create missing
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# instance profiles and roles.
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for name in sorted(set(IAM_INSTANCE_PROFILES) - set(remote_profiles)):
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actual = '%s%s' % (prefix, name)
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print('creating IAM instance profile %s' % actual)
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profile = iamresource.create_instance_profile(
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InstanceProfileName=actual
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)
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remote_profiles[name] = profile
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waiter = iamclient.get_waiter('instance_profile_exists')
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waiter.wait(InstanceProfileName=actual)
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print('IAM instance profile %s is available' % actual)
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for name in sorted(set(IAM_ROLES) - set(remote_roles)):
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entry = IAM_ROLES[name]
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actual = '%s%s' % (prefix, name)
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print('creating IAM role %s' % actual)
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role = iamresource.create_role(
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RoleName=actual,
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Description=entry['description'],
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AssumeRolePolicyDocument=ASSUME_ROLE_POLICY_DOCUMENT,
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)
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waiter = iamclient.get_waiter('role_exists')
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waiter.wait(RoleName=actual)
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print('IAM role %s is available' % actual)
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remote_roles[name] = role
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for arn in entry['policy_arns']:
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print('attaching policy %s to %s' % (arn, role.name))
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role.attach_policy(PolicyArn=arn)
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# Now reconcile state of profiles.
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for name, meta in sorted(IAM_INSTANCE_PROFILES.items()):
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profile = remote_profiles[name]
|
|
|
wanted = {'%s%s' % (prefix, role) for role in meta['roles']}
|
|
|
have = {role.name for role in profile.roles}
|
|
|
|
|
|
for role in sorted(have - wanted):
|
|
|
print('removing role %s from %s' % (role, profile.name))
|
|
|
profile.remove_role(RoleName=role)
|
|
|
|
|
|
for role in sorted(wanted - have):
|
|
|
print('adding role %s to %s' % (role, profile.name))
|
|
|
profile.add_role(RoleName=role)
|
|
|
|
|
|
|
|
|
def find_image(ec2resource, owner_id, name):
|
|
|
"""Find an AMI by its owner ID and name."""
|
|
|
|
|
|
images = ec2resource.images.filter(
|
|
|
Filters=[
|
|
|
{'Name': 'owner-id', 'Values': [owner_id],},
|
|
|
{'Name': 'state', 'Values': ['available'],},
|
|
|
{'Name': 'image-type', 'Values': ['machine'],},
|
|
|
{'Name': 'name', 'Values': [name],},
|
|
|
]
|
|
|
)
|
|
|
|
|
|
for image in images:
|
|
|
return image
|
|
|
|
|
|
raise Exception('unable to find image for %s' % name)
|
|
|
|
|
|
|
|
|
def ensure_security_groups(ec2resource, prefix='hg-'):
|
|
|
"""Ensure all necessary Mercurial security groups are present.
|
|
|
|
|
|
All security groups are prefixed with ``hg-`` by default. Any security
|
|
|
groups having this prefix but aren't in our list are deleted.
|
|
|
"""
|
|
|
existing = {}
|
|
|
|
|
|
for group in ec2resource.security_groups.all():
|
|
|
if group.group_name.startswith(prefix):
|
|
|
existing[group.group_name[len(prefix) :]] = group
|
|
|
|
|
|
purge = set(existing) - set(SECURITY_GROUPS)
|
|
|
|
|
|
for name in sorted(purge):
|
|
|
group = existing[name]
|
|
|
print('removing legacy security group: %s' % group.group_name)
|
|
|
group.delete()
|
|
|
|
|
|
security_groups = {}
|
|
|
|
|
|
for name, group in sorted(SECURITY_GROUPS.items()):
|
|
|
if name in existing:
|
|
|
security_groups[name] = existing[name]
|
|
|
continue
|
|
|
|
|
|
actual = '%s%s' % (prefix, name)
|
|
|
print('adding security group %s' % actual)
|
|
|
|
|
|
group_res = ec2resource.create_security_group(
|
|
|
Description=group['description'], GroupName=actual,
|
|
|
)
|
|
|
|
|
|
group_res.authorize_ingress(IpPermissions=group['ingress'],)
|
|
|
|
|
|
security_groups[name] = group_res
|
|
|
|
|
|
return security_groups
|
|
|
|
|
|
|
|
|
def terminate_ec2_instances(ec2resource, prefix='hg-'):
|
|
|
"""Terminate all EC2 instances managed by us."""
|
|
|
waiting = []
|
|
|
|
|
|
for instance in ec2resource.instances.all():
|
|
|
if instance.state['Name'] == 'terminated':
|
|
|
continue
|
|
|
|
|
|
for tag in instance.tags or []:
|
|
|
if tag['Key'] == 'Name' and tag['Value'].startswith(prefix):
|
|
|
print('terminating %s' % instance.id)
|
|
|
instance.terminate()
|
|
|
waiting.append(instance)
|
|
|
|
|
|
for instance in waiting:
|
|
|
instance.wait_until_terminated()
|
|
|
|
|
|
|
|
|
def remove_resources(c, prefix='hg-'):
|
|
|
"""Purge all of our resources in this EC2 region."""
|
|
|
ec2resource = c.ec2resource
|
|
|
iamresource = c.iamresource
|
|
|
|
|
|
terminate_ec2_instances(ec2resource, prefix=prefix)
|
|
|
|
|
|
for image in ec2resource.images.filter(Owners=['self']):
|
|
|
if image.name.startswith(prefix):
|
|
|
remove_ami(ec2resource, image)
|
|
|
|
|
|
for group in ec2resource.security_groups.all():
|
|
|
if group.group_name.startswith(prefix):
|
|
|
print('removing security group %s' % group.group_name)
|
|
|
group.delete()
|
|
|
|
|
|
for profile in iamresource.instance_profiles.all():
|
|
|
if profile.name.startswith(prefix):
|
|
|
delete_instance_profile(profile)
|
|
|
|
|
|
for role in iamresource.roles.all():
|
|
|
if role.name.startswith(prefix):
|
|
|
for p in role.attached_policies.all():
|
|
|
print('detaching policy %s from %s' % (p.arn, role.name))
|
|
|
role.detach_policy(PolicyArn=p.arn)
|
|
|
|
|
|
print('removing role %s' % role.name)
|
|
|
role.delete()
|
|
|
|
|
|
|
|
|
def wait_for_ip_addresses(instances):
|
|
|
"""Wait for the public IP addresses of an iterable of instances."""
|
|
|
for instance in instances:
|
|
|
while True:
|
|
|
if not instance.public_ip_address:
|
|
|
time.sleep(2)
|
|
|
instance.reload()
|
|
|
continue
|
|
|
|
|
|
print(
|
|
|
'public IP address for %s: %s'
|
|
|
% (instance.id, instance.public_ip_address)
|
|
|
)
|
|
|
break
|
|
|
|
|
|
|
|
|
def remove_ami(ec2resource, image):
|
|
|
"""Remove an AMI and its underlying snapshots."""
|
|
|
snapshots = []
|
|
|
|
|
|
for device in image.block_device_mappings:
|
|
|
if 'Ebs' in device:
|
|
|
snapshots.append(ec2resource.Snapshot(device['Ebs']['SnapshotId']))
|
|
|
|
|
|
print('deregistering %s' % image.id)
|
|
|
image.deregister()
|
|
|
|
|
|
for snapshot in snapshots:
|
|
|
print('deleting snapshot %s' % snapshot.id)
|
|
|
snapshot.delete()
|
|
|
|
|
|
|
|
|
def wait_for_ssm(ssmclient, instances):
|
|
|
"""Wait for SSM to come online for an iterable of instance IDs."""
|
|
|
while True:
|
|
|
res = ssmclient.describe_instance_information(
|
|
|
Filters=[
|
|
|
{'Key': 'InstanceIds', 'Values': [i.id for i in instances],},
|
|
|
],
|
|
|
)
|
|
|
|
|
|
available = len(res['InstanceInformationList'])
|
|
|
wanted = len(instances)
|
|
|
|
|
|
print('%d/%d instances available in SSM' % (available, wanted))
|
|
|
|
|
|
if available == wanted:
|
|
|
return
|
|
|
|
|
|
time.sleep(2)
|
|
|
|
|
|
|
|
|
def run_ssm_command(ssmclient, instances, document_name, parameters):
|
|
|
"""Run a PowerShell script on an EC2 instance."""
|
|
|
|
|
|
res = ssmclient.send_command(
|
|
|
InstanceIds=[i.id for i in instances],
|
|
|
DocumentName=document_name,
|
|
|
Parameters=parameters,
|
|
|
CloudWatchOutputConfig={'CloudWatchOutputEnabled': True,},
|
|
|
)
|
|
|
|
|
|
command_id = res['Command']['CommandId']
|
|
|
|
|
|
for instance in instances:
|
|
|
while True:
|
|
|
try:
|
|
|
res = ssmclient.get_command_invocation(
|
|
|
CommandId=command_id, InstanceId=instance.id,
|
|
|
)
|
|
|
except botocore.exceptions.ClientError as e:
|
|
|
if e.response['Error']['Code'] == 'InvocationDoesNotExist':
|
|
|
print('could not find SSM command invocation; waiting')
|
|
|
time.sleep(1)
|
|
|
continue
|
|
|
else:
|
|
|
raise
|
|
|
|
|
|
if res['Status'] == 'Success':
|
|
|
break
|
|
|
elif res['Status'] in ('Pending', 'InProgress', 'Delayed'):
|
|
|
time.sleep(2)
|
|
|
else:
|
|
|
raise Exception(
|
|
|
'command failed on %s: %s' % (instance.id, res['Status'])
|
|
|
)
|
|
|
|
|
|
|
|
|
@contextlib.contextmanager
|
|
|
def temporary_ec2_instances(ec2resource, config):
|
|
|
"""Create temporary EC2 instances.
|
|
|
|
|
|
This is a proxy to ``ec2client.run_instances(**config)`` that takes care of
|
|
|
managing the lifecycle of the instances.
|
|
|
|
|
|
When the context manager exits, the instances are terminated.
|
|
|
|
|
|
The context manager evaluates to the list of data structures
|
|
|
describing each created instance. The instances may not be available
|
|
|
for work immediately: it is up to the caller to wait for the instance
|
|
|
to start responding.
|
|
|
"""
|
|
|
|
|
|
ids = None
|
|
|
|
|
|
try:
|
|
|
res = ec2resource.create_instances(**config)
|
|
|
|
|
|
ids = [i.id for i in res]
|
|
|
print('started instances: %s' % ' '.join(ids))
|
|
|
|
|
|
yield res
|
|
|
finally:
|
|
|
if ids:
|
|
|
print('terminating instances: %s' % ' '.join(ids))
|
|
|
for instance in res:
|
|
|
instance.terminate()
|
|
|
print('terminated %d instances' % len(ids))
|
|
|
|
|
|
|
|
|
@contextlib.contextmanager
|
|
|
def create_temp_windows_ec2_instances(c: AWSConnection, config):
|
|
|
"""Create temporary Windows EC2 instances.
|
|
|
|
|
|
This is a higher-level wrapper around ``create_temp_ec2_instances()`` that
|
|
|
configures the Windows instance for Windows Remote Management. The emitted
|
|
|
instances will have a ``winrm_client`` attribute containing a
|
|
|
``pypsrp.client.Client`` instance bound to the instance.
|
|
|
"""
|
|
|
if 'IamInstanceProfile' in config:
|
|
|
raise ValueError('IamInstanceProfile cannot be provided in config')
|
|
|
if 'UserData' in config:
|
|
|
raise ValueError('UserData cannot be provided in config')
|
|
|
|
|
|
password = c.automation.default_password()
|
|
|
|
|
|
config = copy.deepcopy(config)
|
|
|
config['IamInstanceProfile'] = {
|
|
|
'Name': 'hg-ephemeral-ec2-1',
|
|
|
}
|
|
|
config.setdefault('TagSpecifications', []).append(
|
|
|
{
|
|
|
'ResourceType': 'instance',
|
|
|
'Tags': [{'Key': 'Name', 'Value': 'hg-temp-windows'}],
|
|
|
}
|
|
|
)
|
|
|
config['UserData'] = WINDOWS_USER_DATA % password
|
|
|
|
|
|
with temporary_ec2_instances(c.ec2resource, config) as instances:
|
|
|
wait_for_ip_addresses(instances)
|
|
|
|
|
|
print('waiting for Windows Remote Management service...')
|
|
|
|
|
|
for instance in instances:
|
|
|
client = wait_for_winrm(
|
|
|
instance.public_ip_address, 'Administrator', password
|
|
|
)
|
|
|
print('established WinRM connection to %s' % instance.id)
|
|
|
instance.winrm_client = client
|
|
|
|
|
|
yield instances
|
|
|
|
|
|
|
|
|
def resolve_fingerprint(fingerprint):
|
|
|
fingerprint = json.dumps(fingerprint, sort_keys=True)
|
|
|
return hashlib.sha256(fingerprint.encode('utf-8')).hexdigest()
|
|
|
|
|
|
|
|
|
def find_and_reconcile_image(ec2resource, name, fingerprint):
|
|
|
"""Attempt to find an existing EC2 AMI with a name and fingerprint.
|
|
|
|
|
|
If an image with the specified fingerprint is found, it is returned.
|
|
|
Otherwise None is returned.
|
|
|
|
|
|
Existing images for the specified name that don't have the specified
|
|
|
fingerprint or are missing required metadata or deleted.
|
|
|
"""
|
|
|
# Find existing AMIs with this name and delete the ones that are invalid.
|
|
|
# Store a reference to a good image so it can be returned one the
|
|
|
# image state is reconciled.
|
|
|
images = ec2resource.images.filter(
|
|
|
Filters=[{'Name': 'name', 'Values': [name]}]
|
|
|
)
|
|
|
|
|
|
existing_image = None
|
|
|
|
|
|
for image in images:
|
|
|
if image.tags is None:
|
|
|
print(
|
|
|
'image %s for %s lacks required tags; removing'
|
|
|
% (image.id, image.name)
|
|
|
)
|
|
|
remove_ami(ec2resource, image)
|
|
|
else:
|
|
|
tags = {t['Key']: t['Value'] for t in image.tags}
|
|
|
|
|
|
if tags.get('HGIMAGEFINGERPRINT') == fingerprint:
|
|
|
existing_image = image
|
|
|
else:
|
|
|
print(
|
|
|
'image %s for %s has wrong fingerprint; removing'
|
|
|
% (image.id, image.name)
|
|
|
)
|
|
|
remove_ami(ec2resource, image)
|
|
|
|
|
|
return existing_image
|
|
|
|
|
|
|
|
|
def create_ami_from_instance(
|
|
|
ec2client, instance, name, description, fingerprint
|
|
|
):
|
|
|
"""Create an AMI from a running instance.
|
|
|
|
|
|
Returns the ``ec2resource.Image`` representing the created AMI.
|
|
|
"""
|
|
|
instance.stop()
|
|
|
|
|
|
ec2client.get_waiter('instance_stopped').wait(
|
|
|
InstanceIds=[instance.id], WaiterConfig={'Delay': 5,}
|
|
|
)
|
|
|
print('%s is stopped' % instance.id)
|
|
|
|
|
|
image = instance.create_image(Name=name, Description=description,)
|
|
|
|
|
|
image.create_tags(
|
|
|
Tags=[{'Key': 'HGIMAGEFINGERPRINT', 'Value': fingerprint,},]
|
|
|
)
|
|
|
|
|
|
print('waiting for image %s' % image.id)
|
|
|
|
|
|
ec2client.get_waiter('image_available').wait(ImageIds=[image.id],)
|
|
|
|
|
|
print('image %s available as %s' % (image.id, image.name))
|
|
|
|
|
|
return image
|
|
|
|
|
|
|
|
|
def ensure_linux_dev_ami(c: AWSConnection, distro='debian10', prefix='hg-'):
|
|
|
"""Ensures a Linux development AMI is available and up-to-date.
|
|
|
|
|
|
Returns an ``ec2.Image`` of either an existing AMI or a newly-built one.
|
|
|
"""
|
|
|
ec2client = c.ec2client
|
|
|
ec2resource = c.ec2resource
|
|
|
|
|
|
name = '%s%s-%s' % (prefix, 'linux-dev', distro)
|
|
|
|
|
|
if distro == 'debian9':
|
|
|
image = find_image(
|
|
|
ec2resource,
|
|
|
DEBIAN_ACCOUNT_ID,
|
|
|
'debian-stretch-hvm-x86_64-gp2-2019-09-08-17994',
|
|
|
)
|
|
|
ssh_username = 'admin'
|
|
|
elif distro == 'debian10':
|
|
|
image = find_image(
|
|
|
ec2resource, DEBIAN_ACCOUNT_ID_2, 'debian-10-amd64-20190909-10',
|
|
|
)
|
|
|
ssh_username = 'admin'
|
|
|
elif distro == 'ubuntu18.04':
|
|
|
image = find_image(
|
|
|
ec2resource,
|
|
|
UBUNTU_ACCOUNT_ID,
|
|
|
'ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-20190918',
|
|
|
)
|
|
|
ssh_username = 'ubuntu'
|
|
|
elif distro == 'ubuntu19.04':
|
|
|
image = find_image(
|
|
|
ec2resource,
|
|
|
UBUNTU_ACCOUNT_ID,
|
|
|
'ubuntu/images/hvm-ssd/ubuntu-disco-19.04-amd64-server-20190918',
|
|
|
)
|
|
|
ssh_username = 'ubuntu'
|
|
|
else:
|
|
|
raise ValueError('unsupported Linux distro: %s' % distro)
|
|
|
|
|
|
config = {
|
|
|
'BlockDeviceMappings': [
|
|
|
{
|
|
|
'DeviceName': image.block_device_mappings[0]['DeviceName'],
|
|
|
'Ebs': {
|
|
|
'DeleteOnTermination': True,
|
|
|
'VolumeSize': 10,
|
|
|
'VolumeType': 'gp2',
|
|
|
},
|
|
|
},
|
|
|
],
|
|
|
'EbsOptimized': True,
|
|
|
'ImageId': image.id,
|
|
|
'InstanceInitiatedShutdownBehavior': 'stop',
|
|
|
# 8 VCPUs for compiling Python.
|
|
|
'InstanceType': 't3.2xlarge',
|
|
|
'KeyName': '%sautomation' % prefix,
|
|
|
'MaxCount': 1,
|
|
|
'MinCount': 1,
|
|
|
'SecurityGroupIds': [c.security_groups['linux-dev-1'].id],
|
|
|
}
|
|
|
|
|
|
requirements2_path = (
|
|
|
pathlib.Path(__file__).parent.parent / 'linux-requirements-py2.txt'
|
|
|
)
|
|
|
requirements3_path = (
|
|
|
pathlib.Path(__file__).parent.parent / 'linux-requirements-py3.txt'
|
|
|
)
|
|
|
with requirements2_path.open('r', encoding='utf-8') as fh:
|
|
|
requirements2 = fh.read()
|
|
|
with requirements3_path.open('r', encoding='utf-8') as fh:
|
|
|
requirements3 = fh.read()
|
|
|
|
|
|
# Compute a deterministic fingerprint to determine whether image needs to
|
|
|
# be regenerated.
|
|
|
fingerprint = resolve_fingerprint(
|
|
|
{
|
|
|
'instance_config': config,
|
|
|
'bootstrap_script': BOOTSTRAP_DEBIAN,
|
|
|
'requirements_py2': requirements2,
|
|
|
'requirements_py3': requirements3,
|
|
|
}
|
|
|
)
|
|
|
|
|
|
existing_image = find_and_reconcile_image(ec2resource, name, fingerprint)
|
|
|
|
|
|
if existing_image:
|
|
|
return existing_image
|
|
|
|
|
|
print('no suitable %s image found; creating one...' % name)
|
|
|
|
|
|
with temporary_ec2_instances(ec2resource, config) as instances:
|
|
|
wait_for_ip_addresses(instances)
|
|
|
|
|
|
instance = instances[0]
|
|
|
|
|
|
client = wait_for_ssh(
|
|
|
instance.public_ip_address,
|
|
|
22,
|
|
|
username=ssh_username,
|
|
|
key_filename=str(c.key_pair_path_private('automation')),
|
|
|
)
|
|
|
|
|
|
home = '/home/%s' % ssh_username
|
|
|
|
|
|
with client:
|
|
|
print('connecting to SSH server')
|
|
|
sftp = client.open_sftp()
|
|
|
|
|
|
print('uploading bootstrap files')
|
|
|
with sftp.open('%s/bootstrap' % home, 'wb') as fh:
|
|
|
fh.write(BOOTSTRAP_DEBIAN)
|
|
|
fh.chmod(0o0700)
|
|
|
|
|
|
with sftp.open('%s/requirements-py2.txt' % home, 'wb') as fh:
|
|
|
fh.write(requirements2)
|
|
|
fh.chmod(0o0700)
|
|
|
|
|
|
with sftp.open('%s/requirements-py3.txt' % home, 'wb') as fh:
|
|
|
fh.write(requirements3)
|
|
|
fh.chmod(0o0700)
|
|
|
|
|
|
print('executing bootstrap')
|
|
|
chan, stdin, stdout = ssh_exec_command(
|
|
|
client, '%s/bootstrap' % home
|
|
|
)
|
|
|
stdin.close()
|
|
|
|
|
|
for line in stdout:
|
|
|
print(line, end='')
|
|
|
|
|
|
res = chan.recv_exit_status()
|
|
|
if res:
|
|
|
raise Exception('non-0 exit from bootstrap: %d' % res)
|
|
|
|
|
|
print(
|
|
|
'bootstrap completed; stopping %s to create %s'
|
|
|
% (instance.id, name)
|
|
|
)
|
|
|
|
|
|
return create_ami_from_instance(
|
|
|
ec2client,
|
|
|
instance,
|
|
|
name,
|
|
|
'Mercurial Linux development environment',
|
|
|
fingerprint,
|
|
|
)
|
|
|
|
|
|
|
|
|
@contextlib.contextmanager
|
|
|
def temporary_linux_dev_instances(
|
|
|
c: AWSConnection,
|
|
|
image,
|
|
|
instance_type,
|
|
|
prefix='hg-',
|
|
|
ensure_extra_volume=False,
|
|
|
):
|
|
|
"""Create temporary Linux development EC2 instances.
|
|
|
|
|
|
Context manager resolves to a list of ``ec2.Instance`` that were created
|
|
|
and are running.
|
|
|
|
|
|
``ensure_extra_volume`` can be set to ``True`` to require that instances
|
|
|
have a 2nd storage volume available other than the primary AMI volume.
|
|
|
For instance types with instance storage, this does nothing special.
|
|
|
But for instance types without instance storage, an additional EBS volume
|
|
|
will be added to the instance.
|
|
|
|
|
|
Instances have an ``ssh_client`` attribute containing a paramiko SSHClient
|
|
|
instance bound to the instance.
|
|
|
|
|
|
Instances have an ``ssh_private_key_path`` attributing containing the
|
|
|
str path to the SSH private key to connect to the instance.
|
|
|
"""
|
|
|
|
|
|
block_device_mappings = [
|
|
|
{
|
|
|
'DeviceName': image.block_device_mappings[0]['DeviceName'],
|
|
|
'Ebs': {
|
|
|
'DeleteOnTermination': True,
|
|
|
'VolumeSize': 12,
|
|
|
'VolumeType': 'gp2',
|
|
|
},
|
|
|
}
|
|
|
]
|
|
|
|
|
|
# This is not an exhaustive list of instance types having instance storage.
|
|
|
# But
|
|
|
if ensure_extra_volume and not instance_type.startswith(
|
|
|
tuple(INSTANCE_TYPES_WITH_STORAGE)
|
|
|
):
|
|
|
main_device = block_device_mappings[0]['DeviceName']
|
|
|
|
|
|
if main_device == 'xvda':
|
|
|
second_device = 'xvdb'
|
|
|
elif main_device == '/dev/sda1':
|
|
|
second_device = '/dev/sdb'
|
|
|
else:
|
|
|
raise ValueError(
|
|
|
'unhandled primary EBS device name: %s' % main_device
|
|
|
)
|
|
|
|
|
|
block_device_mappings.append(
|
|
|
{
|
|
|
'DeviceName': second_device,
|
|
|
'Ebs': {
|
|
|
'DeleteOnTermination': True,
|
|
|
'VolumeSize': 8,
|
|
|
'VolumeType': 'gp2',
|
|
|
},
|
|
|
}
|
|
|
)
|
|
|
|
|
|
config = {
|
|
|
'BlockDeviceMappings': block_device_mappings,
|
|
|
'EbsOptimized': True,
|
|
|
'ImageId': image.id,
|
|
|
'InstanceInitiatedShutdownBehavior': 'terminate',
|
|
|
'InstanceType': instance_type,
|
|
|
'KeyName': '%sautomation' % prefix,
|
|
|
'MaxCount': 1,
|
|
|
'MinCount': 1,
|
|
|
'SecurityGroupIds': [c.security_groups['linux-dev-1'].id],
|
|
|
}
|
|
|
|
|
|
with temporary_ec2_instances(c.ec2resource, config) as instances:
|
|
|
wait_for_ip_addresses(instances)
|
|
|
|
|
|
ssh_private_key_path = str(c.key_pair_path_private('automation'))
|
|
|
|
|
|
for instance in instances:
|
|
|
client = wait_for_ssh(
|
|
|
instance.public_ip_address,
|
|
|
22,
|
|
|
username='hg',
|
|
|
key_filename=ssh_private_key_path,
|
|
|
)
|
|
|
|
|
|
instance.ssh_client = client
|
|
|
instance.ssh_private_key_path = ssh_private_key_path
|
|
|
|
|
|
try:
|
|
|
yield instances
|
|
|
finally:
|
|
|
for instance in instances:
|
|
|
instance.ssh_client.close()
|
|
|
|
|
|
|
|
|
def ensure_windows_dev_ami(
|
|
|
c: AWSConnection, prefix='hg-', base_image_name=WINDOWS_BASE_IMAGE_NAME
|
|
|
):
|
|
|
"""Ensure Windows Development AMI is available and up-to-date.
|
|
|
|
|
|
If necessary, a modern AMI will be built by starting a temporary EC2
|
|
|
instance and bootstrapping it.
|
|
|
|
|
|
Obsolete AMIs will be deleted so there is only a single AMI having the
|
|
|
desired name.
|
|
|
|
|
|
Returns an ``ec2.Image`` of either an existing AMI or a newly-built
|
|
|
one.
|
|
|
"""
|
|
|
ec2client = c.ec2client
|
|
|
ec2resource = c.ec2resource
|
|
|
ssmclient = c.session.client('ssm')
|
|
|
|
|
|
name = '%s%s' % (prefix, 'windows-dev')
|
|
|
|
|
|
image = find_image(ec2resource, AMAZON_ACCOUNT_ID, base_image_name)
|
|
|
|
|
|
config = {
|
|
|
'BlockDeviceMappings': [
|
|
|
{
|
|
|
'DeviceName': '/dev/sda1',
|
|
|
'Ebs': {
|
|
|
'DeleteOnTermination': True,
|
|
|
'VolumeSize': 32,
|
|
|
'VolumeType': 'gp2',
|
|
|
},
|
|
|
}
|
|
|
],
|
|
|
'ImageId': image.id,
|
|
|
'InstanceInitiatedShutdownBehavior': 'stop',
|
|
|
'InstanceType': 't3.medium',
|
|
|
'KeyName': '%sautomation' % prefix,
|
|
|
'MaxCount': 1,
|
|
|
'MinCount': 1,
|
|
|
'SecurityGroupIds': [c.security_groups['windows-dev-1'].id],
|
|
|
}
|
|
|
|
|
|
commands = [
|
|
|
# Need to start the service so sshd_config is generated.
|
|
|
'Start-Service sshd',
|
|
|
'Write-Output "modifying sshd_config"',
|
|
|
r'$content = Get-Content C:\ProgramData\ssh\sshd_config',
|
|
|
'$content = $content -replace "Match Group administrators","" -replace "AuthorizedKeysFile __PROGRAMDATA__/ssh/administrators_authorized_keys",""',
|
|
|
r'$content | Set-Content C:\ProgramData\ssh\sshd_config',
|
|
|
'Import-Module OpenSSHUtils',
|
|
|
r'Repair-SshdConfigPermission C:\ProgramData\ssh\sshd_config -Confirm:$false',
|
|
|
'Restart-Service sshd',
|
|
|
'Write-Output "installing OpenSSL client"',
|
|
|
'Add-WindowsCapability -Online -Name OpenSSH.Client~~~~0.0.1.0',
|
|
|
'Set-Service -Name sshd -StartupType "Automatic"',
|
|
|
'Write-Output "OpenSSH server running"',
|
|
|
]
|
|
|
|
|
|
with INSTALL_WINDOWS_DEPENDENCIES.open('r', encoding='utf-8') as fh:
|
|
|
commands.extend(l.rstrip() for l in fh)
|
|
|
|
|
|
# Disable Windows Defender when bootstrapping because it just slows
|
|
|
# things down.
|
|
|
commands.insert(0, 'Set-MpPreference -DisableRealtimeMonitoring $true')
|
|
|
commands.append('Set-MpPreference -DisableRealtimeMonitoring $false')
|
|
|
|
|
|
# Compute a deterministic fingerprint to determine whether image needs
|
|
|
# to be regenerated.
|
|
|
fingerprint = resolve_fingerprint(
|
|
|
{
|
|
|
'instance_config': config,
|
|
|
'user_data': WINDOWS_USER_DATA,
|
|
|
'initial_bootstrap': WINDOWS_BOOTSTRAP_POWERSHELL,
|
|
|
'bootstrap_commands': commands,
|
|
|
'base_image_name': base_image_name,
|
|
|
}
|
|
|
)
|
|
|
|
|
|
existing_image = find_and_reconcile_image(ec2resource, name, fingerprint)
|
|
|
|
|
|
if existing_image:
|
|
|
return existing_image
|
|
|
|
|
|
print('no suitable Windows development image found; creating one...')
|
|
|
|
|
|
with create_temp_windows_ec2_instances(c, config) as instances:
|
|
|
assert len(instances) == 1
|
|
|
instance = instances[0]
|
|
|
|
|
|
wait_for_ssm(ssmclient, [instance])
|
|
|
|
|
|
# On first boot, install various Windows updates.
|
|
|
# We would ideally use PowerShell Remoting for this. However, there are
|
|
|
# trust issues that make it difficult to invoke Windows Update
|
|
|
# remotely. So we use SSM, which has a mechanism for running Windows
|
|
|
# Update.
|
|
|
print('installing Windows features...')
|
|
|
run_ssm_command(
|
|
|
ssmclient,
|
|
|
[instance],
|
|
|
'AWS-RunPowerShellScript',
|
|
|
{'commands': WINDOWS_BOOTSTRAP_POWERSHELL.split('\n'),},
|
|
|
)
|
|
|
|
|
|
# Reboot so all updates are fully applied.
|
|
|
#
|
|
|
# We don't use instance.reboot() here because it is asynchronous and
|
|
|
# we don't know when exactly the instance has rebooted. It could take
|
|
|
# a while to stop and we may start trying to interact with the instance
|
|
|
# before it has rebooted.
|
|
|
print('rebooting instance %s' % instance.id)
|
|
|
instance.stop()
|
|
|
ec2client.get_waiter('instance_stopped').wait(
|
|
|
InstanceIds=[instance.id], WaiterConfig={'Delay': 5,}
|
|
|
)
|
|
|
|
|
|
instance.start()
|
|
|
wait_for_ip_addresses([instance])
|
|
|
|
|
|
# There is a race condition here between the User Data PS script running
|
|
|
# and us connecting to WinRM. This can manifest as
|
|
|
# "AuthorizationManager check failed" failures during run_powershell().
|
|
|
# TODO figure out a workaround.
|
|
|
|
|
|
print('waiting for Windows Remote Management to come back...')
|
|
|
client = wait_for_winrm(
|
|
|
instance.public_ip_address,
|
|
|
'Administrator',
|
|
|
c.automation.default_password(),
|
|
|
)
|
|
|
print('established WinRM connection to %s' % instance.id)
|
|
|
instance.winrm_client = client
|
|
|
|
|
|
print('bootstrapping instance...')
|
|
|
run_powershell(instance.winrm_client, '\n'.join(commands))
|
|
|
|
|
|
print('bootstrap completed; stopping %s to create image' % instance.id)
|
|
|
return create_ami_from_instance(
|
|
|
ec2client,
|
|
|
instance,
|
|
|
name,
|
|
|
'Mercurial Windows development environment',
|
|
|
fingerprint,
|
|
|
)
|
|
|
|
|
|
|
|
|
@contextlib.contextmanager
|
|
|
def temporary_windows_dev_instances(
|
|
|
c: AWSConnection,
|
|
|
image,
|
|
|
instance_type,
|
|
|
prefix='hg-',
|
|
|
disable_antivirus=False,
|
|
|
):
|
|
|
"""Create a temporary Windows development EC2 instance.
|
|
|
|
|
|
Context manager resolves to the list of ``EC2.Instance`` that were created.
|
|
|
"""
|
|
|
config = {
|
|
|
'BlockDeviceMappings': [
|
|
|
{
|
|
|
'DeviceName': '/dev/sda1',
|
|
|
'Ebs': {
|
|
|
'DeleteOnTermination': True,
|
|
|
'VolumeSize': 32,
|
|
|
'VolumeType': 'gp2',
|
|
|
},
|
|
|
}
|
|
|
],
|
|
|
'ImageId': image.id,
|
|
|
'InstanceInitiatedShutdownBehavior': 'stop',
|
|
|
'InstanceType': instance_type,
|
|
|
'KeyName': '%sautomation' % prefix,
|
|
|
'MaxCount': 1,
|
|
|
'MinCount': 1,
|
|
|
'SecurityGroupIds': [c.security_groups['windows-dev-1'].id],
|
|
|
}
|
|
|
|
|
|
with create_temp_windows_ec2_instances(c, config) as instances:
|
|
|
if disable_antivirus:
|
|
|
for instance in instances:
|
|
|
run_powershell(
|
|
|
instance.winrm_client,
|
|
|
'Set-MpPreference -DisableRealtimeMonitoring $true',
|
|
|
)
|
|
|
|
|
|
yield instances
|
|
|
|
