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vpncloud/contrib/common.py

369 lines
14 KiB

import boto3
import atexit
import paramiko
import io
import time
import threading
import re
import json
import base64
import sys
from datetime import date
MAX_WAIT = 300
CREATE = "***CREATE***"
def eprint(*args, **kwargs):
print(*args, file=sys.stderr, **kwargs)
def run_cmd(connection, cmd):
_stdin, stdout, stderr = connection.exec_command(cmd)
out = stdout.read().decode('utf-8')
err = stderr.read().decode('utf-8')
code = stdout.channel.recv_exit_status()
if code:
raise Exception("Command failed", code, out, err)
else:
return out, err
class SpotInstanceRequest:
def __init__(self, id):
self.id = id
def __str__(self):
return str(self.id)
class Node:
def __init__(self, instance, connection):
self.instance = instance
self.connection = connection
self.private_ip = instance.private_ip_address
self.public_ip = instance.public_ip_address
def run_cmd(self, cmd):
return run_cmd(self.connection, cmd)
def start_vpncloud(self, ifup=None, mtu=1400, ip=None, crypto=None, shared_key="test", device_type="tap", listen="3210", mode="normal", peers=[], subnets=[]):
args = [
"--daemon",
"--no-port-forwarding",
"-t {}".format(device_type),
"-m {}".format(mode),
"-l {}".format(listen)
]
if ifup:
args.append("--ifup {}".format(ifup))
else:
args.append("--ifup 'ifconfig $IFNAME {ip} mtu {mtu} up'".format(mtu=mtu, ip=ip))
if crypto:
args.append("--shared-key '{}' --crypto {}".format(shared_key, crypto))
for p in peers:
args.append("-c {}".format(p))
for s in subnets:
args.append("-s {}".format(s))
args = " ".join(args)
self.run_cmd("sudo vpncloud {}".format(args))
def stop_vpncloud(self, wait=True):
self.run_cmd("sudo killall vpncloud")
if wait:
time.sleep(3.0)
def ping(self, dst, size=100, count=10, interval=0.001):
(out, _) = self.run_cmd('sudo ping {dst} -c {count} -i {interval} -s {size} -U -q'.format(dst=dst, size=size, count=count, interval=interval))
match = re.search(r'([\d]*\.[\d]*)/([\d]*\.[\d]*)/([\d]*\.[\d]*)/([\d]*\.[\d]*)', out)
ping_min = float(match.group(1))
ping_avg = float(match.group(2))
ping_max = float(match.group(3))
match = re.search(r'(\d*)% packet loss', out)
pkt_loss = float(match.group(1))
return {
"rtt_min": ping_min,
"rtt_max": ping_max,
"rtt_avg": ping_avg,
"pkt_loss": pkt_loss
}
def start_iperf_server(self):
self.run_cmd('iperf3 -s -D')
time.sleep(0.1)
def stop_iperf_server(self):
self.run_cmd('killall iperf3')
def run_iperf(self, dst, duration):
(out, _) = self.run_cmd('iperf3 -c {dst} -t {duration} --json'.format(dst=dst, duration=duration))
data = json.loads(out)
return {
"throughput": data['end']['streams'][0]['receiver']['bits_per_second'],
"cpu_sender": data['end']['cpu_utilization_percent']['host_total'],
"cpu_receiver": data['end']['cpu_utilization_percent']['remote_total']
}
def find_ami(region, owner, name_pattern, arch='x86_64'):
ec2client = boto3.client('ec2', region_name=region)
response = ec2client.describe_images(Owners=[owner], Filters=[
{'Name': 'name', 'Values': [name_pattern]},
{'Name': 'architecture', 'Values': ['x86_64']}
])
try:
image = max(response['Images'], key=lambda i: i['CreationDate'])
return image['ImageId']
except ValueError:
return None
class EC2Environment:
def __init__(self, vpncloud_version, region, node_count, instance_type, use_spot=True, max_price=0.1, ami=('amazon', 'amzn2-ami-hvm-*'), username="ec2-user", subnet=CREATE, keyname=CREATE, privatekey=CREATE, tag="vpncloud", cluster_nodes=False):
self.region = region
self.node_count = node_count
self.instance_type = instance_type
self.use_spot = use_spot
self.max_price = str(max_price)
if isinstance(ami, tuple):
owner, name = ami
self.ami = find_ami(region, owner, name)
assert self.ami
else:
self.ami = ami
self.username = username
self.vpncloud_version = vpncloud_version
self.cluster_nodes = cluster_nodes
self.resources = []
self.instances = []
self.connections = []
self.nodes = []
self.subnet = subnet
self.tag = tag
self.keyname = keyname
self.privatekey = privatekey
self.rsa_key = None
try:
eprint("Setting up resources...")
self.setup()
self.wait_until_ready()
for i in range(0, self.node_count):
self.nodes.append(Node(self.instances[i], self.connections[i]))
eprint("Setup done")
atexit.register(lambda : self.terminate())
eprint()
except:
eprint("Error, shutting down")
self.terminate()
raise
def track_resource(self, res):
self.resources.append(res)
eprint("\t{} {}".format(res.__class__.__name__, res.id if hasattr(res, "id") else ""))
if hasattr(res, "create_tags") and not hasattr(res, "name"):
res.create_tags(Tags=[{"Key": "Name", "Value": self.tag}])
def setup_vpc(self):
ec2 = boto3.resource('ec2', region_name=self.region)
ec2client = boto3.client('ec2', region_name=self.region)
vpc = ec2.create_vpc(CidrBlock='172.16.0.0/16')
self.track_resource(vpc)
vpc.wait_until_available()
ec2client.modify_vpc_attribute(VpcId=vpc.id, EnableDnsSupport={'Value': True})
ec2client.modify_vpc_attribute(VpcId=vpc.id, EnableDnsHostnames={'Value': True})
igw = ec2.create_internet_gateway()
self.track_resource(igw)
igw.attach_to_vpc(VpcId=vpc.id)
rtb = vpc.create_route_table()
self.track_resource(rtb)
rtb.create_route(DestinationCidrBlock='0.0.0.0/0', GatewayId=igw.id)
subnet = ec2.create_subnet(CidrBlock='172.16.1.0/24', VpcId=vpc.id)
self.track_resource(subnet)
rtb.associate_with_subnet(SubnetId=subnet.id)
self.subnet = subnet.id
def setup(self):
ec2 = boto3.resource('ec2', region_name=self.region)
ec2client = boto3.client('ec2', region_name=self.region)
if self.subnet == CREATE:
self.setup_vpc()
else:
eprint("\tUsing subnet {}".format(self.subnet))
vpc = ec2.Subnet(self.subnet).vpc
sg = ec2.create_security_group(GroupName='SSH-ONLY', Description='only allow SSH traffic', VpcId=vpc.id)
self.track_resource(sg)
sg.authorize_ingress(CidrIp='0.0.0.0/0', IpProtocol='tcp', FromPort=22, ToPort=22)
sg.authorize_ingress(CidrIp='172.16.1.0/24', IpProtocol='icmp', FromPort=-1, ToPort=-1)
sg.authorize_ingress(CidrIp='172.16.1.0/24', IpProtocol='tcp', FromPort=0, ToPort=65535)
sg.authorize_ingress(CidrIp='172.16.1.0/24', IpProtocol='udp', FromPort=0, ToPort=65535)
if self.keyname == CREATE:
key_pair = ec2.create_key_pair(KeyName="{}-keypair".format(self.tag))
self.track_resource(key_pair)
self.keyname = key_pair.name
self.privatekey = key_pair.key_material
self.rsa_key = paramiko.RSAKey.from_private_key(io.StringIO(self.privatekey))
placement = {}
if self.cluster_nodes:
placement_group = ec2.create_placement_group(GroupName="{}-placement".format(self.tag), Strategy="cluster")
self.track_resource(placement_group)
placement = { 'GroupName': placement_group.name }
userdata = """#cloud-config
packages:
- iperf3
runcmd:
- wget https://github.com/dswd/vpncloud/releases/download/v{version}/vpncloud_{version}.x86_64.rpm -O /tmp/vpncloud.rpm
- yum install -y /tmp/vpncloud.rpm
""".format(version=self.vpncloud_version)
if self.use_spot:
response = ec2client.request_spot_instances(
SpotPrice = self.max_price,
Type = "one-time",
InstanceCount = self.node_count,
LaunchSpecification = {
"ImageId": self.ami,
"InstanceType": self.instance_type,
"KeyName": key_pair.name,
"UserData": base64.b64encode(userdata.encode("ascii")).decode('ascii'),
"BlockDeviceMappings": [
{
"DeviceName": "/dev/xvda",
"Ebs": {
"DeleteOnTermination": True,
"VolumeType": "gp2",
"VolumeSize": 8,
}
}
],
"NetworkInterfaces": [
{
'SubnetId': self.subnet,
'DeviceIndex': 0,
'AssociatePublicIpAddress': True,
'Groups': [sg.group_id]
}
],
"Placement": placement
}
)
requests = []
for req in response['SpotInstanceRequests']:
request = SpotInstanceRequest(req['SpotInstanceRequestId'])
self.track_resource(request)
requests.append(request)
eprint("Waiting for spot instance requests")
waited = 0
self.instances = [None] * len(requests)
while waited < MAX_WAIT:
time.sleep(1.0)
for i, req in enumerate(requests):
response = ec2client.describe_spot_instance_requests(SpotInstanceRequestIds=[req.id])
data = response['SpotInstanceRequests'][0]
if 'InstanceId' in data:
self.instances[i] = ec2.Instance(data['InstanceId'])
self.track_resource(self.instances[i])
if min(map(bool, self.instances)):
break
if waited >= MAX_WAIT:
raise Exception("Waited too long")
else:
self.instances = ec2.create_instances(
ImageId=self.ami,
InstanceType=self.instance_type,
MaxCount=self.node_count,
MinCount=self.node_count,
NetworkInterfaces=[
{
'SubnetId': self.subnet.id,
'DeviceIndex': 0,
'AssociatePublicIpAddress': True,
'Groups': [sg.group_id]
}
],
Placement=placement,
UserData=userdata,
KeyName='vpncloud-perf-test-keypair'
)
for instance in self.instances:
self.track_resource(instance)
def wait_until_ready(self):
waited = 0
eprint("Waiting for instances to start...")
for instance in self.instances:
instance.wait_until_running()
instance.reload()
eprint("Waiting for SSH to be ready...")
self.connections = [None] * len(self.instances)
while waited < MAX_WAIT:
for i, instance in enumerate(self.instances):
if self.connections[i]:
continue
try:
self.connections[i] = self._connect(instance)
except:
pass
if min(map(bool, self.connections)):
break
time.sleep(1.0)
waited += 1
eprint("Waiting for instances to finish setup...")
ready = [False] * len(self.connections)
while waited < MAX_WAIT:
for i, con in enumerate(self.connections):
if ready[i]:
continue
try:
run_cmd(con, 'test -f /var/lib/cloud/instance/boot-finished')
ready[i] = True
except:
pass
if min(map(bool, ready)):
break
time.sleep(1.0)
waited += 1
if waited >= MAX_WAIT:
raise Exception("Waited too long")
def terminate(self):
if not self.resources:
return
eprint("Closing connections...")
for con in self.connections:
if con:
con.close()
self.connections = []
eprint("Terminating instances...")
for instance in self.instances:
instance.terminate()
for instance in self.instances:
eprint("\t{}".format(instance.id))
instance.wait_until_terminated()
self.instances = []
eprint("Deleting resources...")
ec2client = boto3.client('ec2', region_name=self.region)
for res in reversed(self.resources):
eprint("\t{} {}".format(res.__class__.__name__, res.id if hasattr(res, "id") else ""))
if isinstance(res, SpotInstanceRequest):
ec2client.cancel_spot_instance_requests(SpotInstanceRequestIds=[res.id])
if hasattr(res, "attachments"):
for a in res.attachments:
res.detach_from_vpc(VpcId=a['VpcId'])
if hasattr(res, "delete"):
res.delete()
self.resources = []
def _connect(self, instance):
client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(hostname=instance.public_dns_name, username=self.username, pkey=self.rsa_key, timeout=1.0, banner_timeout=1.0)
return client