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#!/usr/bin/env python
# A service that mocks up various metadata providers. Used for testing,
# can also be used standalone as a development aid.
#
# To run standalone:
#
# run: $ systemd-socket-activate -l 8000 python tools/test-cloud-meta-mock.py &
# $ NM_CLOUD_SETUP_EC2_HOST=http://localhost:8000 \
# NM_CLOUD_SETUP_LOG=trace \
# NM_CLOUD_SETUP_EC2=yes src/nm-cloud-setup/nm-cloud-setup
# or just: $ python tools/test-cloud-meta-mock.py
#
# By default, the utility will server some resources for each known cloud
# providers, for convenience. The tests start this with "--empty" argument,
# which starts with no resources.
import os
import socket
from sys import argv
from http.server import HTTPServer
from http.server import BaseHTTPRequestHandler
from socketserver import BaseServer
class MockCloudMDRequestHandler(BaseHTTPRequestHandler):
"""
Respond to cloud metadata service requests.
Currently implements a fairly minimal subset of AWS EC2 API.
"""
def log_message(self, format, *args):
pass
def do_GET(self):
path = self.path.encode("ascii")
if path in self.server._resources:
self.send_response(200)
self.end_headers()
self.wfile.write(self.server._resources[path])
else:
self.send_response(404)
self.end_headers()
def do_PUT(self):
path = self.path.encode("ascii")
if path == b"/latest/api/token":
self.send_response(200)
self.end_headers()
self.wfile.write(
b"AQAAALH-k7i18JMkK-ORLZQfAa7nkNjQbKwpQPExNHqzk1oL_7eh-A=="
)
else:
length = int(self.headers["content-length"])
self.server._resources[path] = self.rfile.read(length)
self.send_response(201)
self.end_headers()
def do_DELETE(self):
path = self.path.encode("ascii")
if path in self.server._resources:
del self.server._resources[path]
self.send_response(204)
self.end_headers()
else:
self.send_response(404)
self.end_headers()
class SocketHTTPServer(HTTPServer):
"""
A HTTP server that accepts a socket (that has already been
listen()-ed on). This is useful when the socket is passed
fron the test runner.
"""
def __init__(self, server_address, RequestHandlerClass, socket, resources):
BaseServer.__init__(self, server_address, RequestHandlerClass)
self.socket = socket
self.server_address = self.socket.getsockname()
self._resources = resources
def default_resources():
ec2_macs = b"/2018-09-24/meta-data/network/interfaces/macs/"
aliyun_meta = b"/2016-01-01/meta-data/"
aliyun_macs = aliyun_meta + b"network/interfaces/macs/"
azure_meta = b"/metadata/instance"
azure_iface = azure_meta + b"/network/interface/"
azure_query = b"?format=text&api-version=2017-04-02"
gcp_meta = b"/computeMetadata/v1/instance/"
gcp_iface = gcp_meta + b"network-interfaces/"
mac1 = b"9e:c0:3e:92:24:2d"
mac2 = b"53:e9:7e:52:8d:a8"
ip1 = b"172.31.26.249"
ip2 = b"172.31.176.249"
return {
b"/latest/meta-data/": b"ami-id\n",
ec2_macs: mac2 + b"\n" + mac1,
ec2_macs + mac2 + b"/subnet-ipv4-cidr-block": b"172.31.16.0/20",
ec2_macs + mac2 + b"/local-ipv4s": ip1,
ec2_macs + mac1 + b"/subnet-ipv4-cidr-block": b"172.31.166.0/20",
ec2_macs + mac1 + b"/local-ipv4s": ip2,
aliyun_meta: b"ami-id\n",
aliyun_macs: mac2 + b"\n" + mac1,
aliyun_macs + mac2 + b"/vpc-cidr-block": b"172.31.16.0/20",
aliyun_macs + mac2 + b"/private-ipv4s": ip1,
aliyun_macs + mac2 + b"/primary-ip-address": ip1,
aliyun_macs + mac2 + b"/netmask": b"255.255.255.0",
aliyun_macs + mac2 + b"/gateway": b"172.31.26.2",
aliyun_macs + mac1 + b"/vpc-cidr-block": b"172.31.166.0/20",
aliyun_macs + mac1 + b"/private-ipv4s": ip2,
aliyun_macs + mac1 + b"/primary-ip-address": ip2,
aliyun_macs + mac1 + b"/netmask": b"255.255.255.0",
aliyun_macs + mac1 + b"/gateway": b"172.31.176.2",
azure_meta + azure_query: b"",
azure_iface + azure_query: b"0\n1\n",
azure_iface + b"0/macAddress" + azure_query: mac1,
azure_iface + b"1/macAddress" + azure_query: mac2,
azure_iface + b"0/ipv4/ipAddress/" + azure_query: b"0\n",
azure_iface + b"1/ipv4/ipAddress/" + azure_query: b"0\n",
azure_iface + b"0/ipv4/ipAddress/0/privateIpAddress" + azure_query: ip1,
azure_iface + b"1/ipv4/ipAddress/0/privateIpAddress" + azure_query: ip2,
azure_iface + b"0/ipv4/subnet/0/address/" + azure_query: b"172.31.16.0",
azure_iface + b"1/ipv4/subnet/0/address/" + azure_query: b"172.31.166.0",
azure_iface + b"0/ipv4/subnet/0/prefix/" + azure_query: b"20",
azure_iface + b"1/ipv4/subnet/0/prefix/" + azure_query: b"20",
gcp_meta + b"id": b"",
gcp_iface: b"0\n1\n",
gcp_iface + b"0/mac": mac1,
gcp_iface + b"1/mac": mac2,
gcp_iface + b"0/forwarded-ips/": b"0\n",
gcp_iface + b"0/forwarded-ips/0": ip1,
gcp_iface + b"1/forwarded-ips/": b"0\n",
gcp_iface + b"1/forwarded-ips/0": ip2,
}
resources = None
try:
if argv[1] == "--empty":
resources = {}
except IndexError:
pass
if resources is None:
resources = default_resources()
# See sd_listen_fds(3)
fileno = os.getenv("LISTEN_FDS")
if fileno is not None:
if fileno != "1":
raise Exception("Bad LISTEN_FDS")
s = socket.socket(fileno=3)
else:
addr = ("localhost", 0)
s = socket.socket()
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
s.bind(addr)
httpd = SocketHTTPServer(None, MockCloudMDRequestHandler, socket=s, resources=resources)
print("Listening on http://%s:%d" % (httpd.server_address[0], httpd.server_address[1]))
httpd.server_activate()
httpd.serve_forever()
httpd.server_close()
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