💊 capsul.org cloud compute service - python flask web application
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import subprocess
import re
import json
import sys
#import pprint
from flask import current_app
from time import sleep
from os.path import join
from subprocess import run
from capsulflask.db import get_model
from capsulflask.shared import VirtualizationInterface, VirtualMachine, validate_capsul_id, my_exec_info_message
class MockSpoke(VirtualizationInterface):
def __init__(self):
self.capsuls = dict()
def capacity_avaliable(self, additional_ram_bytes):
return True
def get(self, id, get_ssh_host_keys):
validate_capsul_id(id)
ipv4 = "1.1.1.1"
if id in self.capsuls:
ipv4 = self.capsuls[id]['public_ipv4']
if get_ssh_host_keys:
ssh_host_keys = json.loads("""[
{"key_type":"ED25519", "content":"ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN8cna0zeKSKl/r8whdn/KmDWhdzuWRVV0GaKIM+eshh", "sha256":"V4X2apAF6btGAfS45gmpldknoDX0ipJ5c6DLfZR2ttQ"},
{"key_type":"RSA", "content":"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCvotgzgEP65JUQ8S8OoNKy1uEEPEAcFetSp7QpONe6hj4wPgyFNgVtdoWdNcU19dX3hpdse0G8OlaMUTnNVuRlbIZXuifXQ2jTtCFUA2mmJ5bF+XjGm3TXKMNGh9PN+wEPUeWd14vZL+QPUMev5LmA8cawPiU5+vVMLid93HRBj118aCJFQxLgrdP48VPfKHFRfCR6TIjg1ii3dH4acdJAvlmJ3GFB6ICT42EmBqskz2MPe0rIFxH8YohCBbAbrbWYcptHt4e48h4UdpZdYOhEdv89GrT8BF2C5cbQ5i9qVpI57bXKrj8hPZU5of48UHLSpXG8mbH0YDiOQOfKX/Mt", "sha256":"ghee6KzRnBJhND2kEUZSaouk7CD6o6z2aAc8GPkV+GQ"},
{"key_type":"ECDSA", "content":"ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBLLgOoATz9R4aS2kk7vWoxX+lshK63t9+5BIHdzZeFE1o+shlcf0Wji8cN/L1+m3bi0uSETZDOAWMP3rHLJj9Hk=", "sha256":"aCYG1aD8cv/TjzJL0bi9jdabMGksdkfa7R8dCGm1yYs"}
]""")
return VirtualMachine(id, current_app.config["SPOKE_HOST_ID"], ipv4=ipv4, state="running", ssh_host_keys=ssh_host_keys)
return VirtualMachine(id, current_app.config["SPOKE_HOST_ID"], ipv4=ipv4, state="running")
def get_all_by_id(self) -> dict:
by_host_and_network = get_model().non_deleted_vms_by_host_and_network(current_app.config["SPOKE_HOST_ID"])
to_return = dict()
for host in by_host_and_network.values():
for network in host.values():
for vm in network:
vm['state'] = vm['desired_state']
to_return[vm['id']] = vm
current_app.logger.info(f"MOCK get_all_by_id: {json.dumps(to_return)}")
return to_return
def create(self, email: str, id: str, template_image_file_name: str, vcpus: int, memory_mb: int, ssh_authorized_keys: list, network_name: str, public_ipv4: str):
validate_capsul_id(id)
current_app.logger.info(f"mock create: {id} for {email}")
self.capsuls[id] = dict(email=email, id=id, network_name=network_name, public_ipv4=public_ipv4)
sleep(1)
def destroy(self, email: str, id: str):
current_app.logger.info(f"mock destroy: {id} for {email}")
def vm_state_command(self, email: str, id: str, command: str):
current_app.logger.info(f"mock {command}: {id} for {email}")
def net_set_dhcp(self, email: str, host_id: str, network_name: str, macs: list, remove_ipv4: str, add_ipv4: str):
current_app.logger.info(f"mock net_set_dhcp: host_id={host_id} network_name={network_name} macs={','.join(macs)} remove_ipv4={remove_ipv4} add_ipv4={add_ipv4} for {email}")
class ShellScriptSpoke(VirtualizationInterface):
def validate_completed_process(self, completedProcess, email=None):
emailPart = ""
if email != None:
emailPart = f"for {email}"
if completedProcess.returncode != 0:
raise RuntimeError(f"""{" ".join(completedProcess.args)} failed {emailPart} with exit code {completedProcess.returncode}
stdout:
{completedProcess.stdout}
stderr:
{completedProcess.stderr}
""")
def capacity_avaliable(self, additional_ram_bytes):
my_args=[join(current_app.root_path, 'shell_scripts/capacity-avaliable.sh'), str(additional_ram_bytes)]
completedProcess = run(my_args, capture_output=True)
if completedProcess.returncode != 0:
current_app.logger.error(f"""
capacity-avaliable.sh exited {completedProcess.returncode} with
stdout:
{completedProcess.stdout}
stderr:
{completedProcess.stderr}
""")
return False
lines = completedProcess.stdout.splitlines()
output = lines[len(lines)-1]
if not output == b"yes":
current_app.logger.error(f"capacity-avaliable.sh exited 0 and returned {output} but did not return \"yes\" ")
return False
return True
def get(self, id, get_ssh_host_keys):
validate_capsul_id(id)
completedProcess = run([join(current_app.root_path, 'shell_scripts/get.sh'), id], capture_output=True)
self.validate_completed_process(completedProcess)
lines = completedProcess.stdout.splitlines()
if len(lines) == 0:
current_app.logger.warning("shell_scripts/get.sh returned zero lines!")
return None
result_string = lines[0].decode("utf-8")
fields = result_string.split(" ")
if fields[0] != "true":
current_app.logger.warning(f"shell_scripts/get.sh was called for {id} which libvirt says does not exist.")
return None
if len(fields) < 2:
return VirtualMachine(id, current_app.config["SPOKE_HOST_ID"])
state = fields[1]
if len(fields) < 3:
return VirtualMachine(id, current_app.config["SPOKE_HOST_ID"], state=state)
ipaddr = fields[2]
if not re.match(r"^([0-9]{1,3}\.){3}[0-9]{1,3}$", ipaddr):
return VirtualMachine(id, current_app.config["SPOKE_HOST_ID"], state=state)
if get_ssh_host_keys:
try:
completedProcess2 = run([join(current_app.root_path, 'shell_scripts/ssh-keyscan.sh'), ipaddr], capture_output=True)
self.validate_completed_process(completedProcess2)
ssh_host_keys = json.loads(completedProcess2.stdout.decode("utf-8"))
return VirtualMachine(id, current_app.config["SPOKE_HOST_ID"], state=state, ipv4=ipaddr, ssh_host_keys=ssh_host_keys)
except:
current_app.logger.warning(f"""
failed to ssh-keyscan {id} at {ipaddr}:
{my_exec_info_message(sys.exc_info())}"""
)
return VirtualMachine(id, current_app.config["SPOKE_HOST_ID"], state=state, ipv4=ipaddr)
def get_all_by_id(self) -> dict:
vm_list_process = run([join(current_app.root_path, 'shell_scripts/virsh-list.sh')], capture_output=True)
self.validate_completed_process(vm_list_process)
vms_json_string = vm_list_process.stdout.decode("utf-8")
#current_app.logger.info(f"vms_json_string: {vms_json_string}")
list_of_vms = json.loads(vms_json_string)
#current_app.logger.info(f"list_of_vms: {json.dumps(list_of_vms)}")
vms_by_id = dict()
for vm in list_of_vms:
vms_by_id[vm['id']] = dict(id=vm['id'], macs=dict(), state=vm['state'])
net_list_process = run([join(current_app.root_path, 'shell_scripts/virsh-net-list.sh')], capture_output=True)
self.validate_completed_process(net_list_process)
net_list_json_string = net_list_process.stdout.decode("utf-8")
#current_app.logger.info(f"net_list_json_string: {net_list_json_string}")
list_of_networks = json.loads(net_list_json_string)
#current_app.logger.info(f"list_of_networks: {json.dumps(list_of_networks)}")
vm_id_by_mac = dict()
for network in list_of_networks:
macs_json_filename = f"{current_app.config['LIBVIRT_DNSMASQ_PATH']}/{network['virtual_bridge_name']}.macs"
with open(macs_json_filename, mode='r') as macs_json_file:
vms_with_macs = []
try:
vms_with_macs = json.load(macs_json_file)
except:
current_app.logger.warn(f"failed to parse the JSON file '{macs_json_filename}'")
for vm in vms_with_macs:
for mac in vm['macs']:
if mac not in vm_id_by_mac:
vm_id_by_mac[mac] = vm['domain']
else:
raise Exception(f"the mac address '{mac}' is used by both '{vm_id_by_mac[mac]}' and '{vm['domain']}'")
if vm['domain'] not in vms_by_id:
current_app.logger.warn(f"'{vm['domain']}' was in dnsmask but not in libvirt, defaulting to 'shut off' state")
vms_by_id[vm['domain']] = dict(id=vm['domain'], macs=dict(), state="shut off")
vms_by_id[vm['domain']]['network_name'] = network['network_name']
vms_by_id[vm['domain']]['macs'][mac] = True
status_json_filename = f"{current_app.config['LIBVIRT_DNSMASQ_PATH']}/{network['virtual_bridge_name']}.status"
with open(status_json_filename, mode='r') as status_json_file:
statuses = []
try:
statuses = json.load(status_json_file)
except:
current_app.logger.warn(f"failed to parse the JSON file '{status_json_filename}'")
for status in statuses:
if status['mac-address'] in vm_id_by_mac:
vm_id = vm_id_by_mac[status['mac-address']]
vms_by_id[vm_id]['public_ipv4'] = status['ip-address']
else:
current_app.logger.warn(f"get_all_by_id: {status['mac-address']} not in vm_id_by_mac")
#current_app.logger.info(f"\n*******************3:\n{pprint.pformat(vms_by_id)}\n\n\n\n")
return vms_by_id
def create(self, email: str, id: str, template_image_file_name: str, vcpus: int, memory_mb: int, ssh_authorized_keys: list, network_name: str, public_ipv4: str):
validate_capsul_id(id)
if not re.match(r"^[a-zA-Z0-9/_.-]+$", template_image_file_name):
raise ValueError(f"template_image_file_name \"{template_image_file_name}\" must match \"^[a-zA-Z0-9/_.-]+$\"")
for ssh_authorized_key in ssh_authorized_keys:
if not re.match(r"^(ssh|ecdsa)-[0-9A-Za-z+/_=@:. -]+$", ssh_authorized_key):
raise ValueError(f"ssh_authorized_key \"{ssh_authorized_key}\" must match \"^(ssh|ecdsa)-[0-9A-Za-z+/_=@:. -]+$\"")
if isinstance(vcpus, int) and (vcpus < 1 or vcpus > 8):
raise ValueError(f"vcpus \"{vcpus}\" must match 1 <= vcpus <= 8")
if isinstance(memory_mb, int) and (memory_mb < 512 or memory_mb > 16384):
raise ValueError(f"memory_mb \"{memory_mb}\" must match 512 <= memory_mb <= 16384")
if not re.match(r"^[a-zA-Z0-9_-]+$", network_name):
raise ValueError(f"network_name \"{network_name}\" must match \"^[a-zA-Z0-9_-]+\"")
# if not re.match(r"^[0-9.]+$", public_ipv4):
# raise ValueError(f"public_ipv4 \"{public_ipv4}\" must match \"^[0-9.]+$\"")
ssh_keys_string = "\n".join(ssh_authorized_keys)
completedProcess = run([
join(current_app.root_path, 'shell_scripts/create.sh'),
id,
template_image_file_name,
str(vcpus),
str(memory_mb),
ssh_keys_string,
network_name,
public_ipv4
], capture_output=True)
self.validate_completed_process(completedProcess, email)
lines = completedProcess.stdout.splitlines()
status = lines[len(lines)-1].decode("utf-8")
vmSettings = f"""
id={id}
template_image_file_name={template_image_file_name}
vcpus={str(vcpus)}
memory={str(memory_mb)}
ssh_authorized_keys={ssh_keys_string}
network_name={network_name}
public_ipv4={public_ipv4}
"""
if not status == "success":
raise ValueError(f"""failed to create vm for {email} with:
{vmSettings}
stdout:
{completedProcess.stdout}
stderr:
{completedProcess.stderr}
""")
def destroy(self, email: str, id: str):
validate_capsul_id(id)
completedProcess = run([join(current_app.root_path, 'shell_scripts/destroy.sh'), id], capture_output=True)
self.validate_completed_process(completedProcess, email)
lines = completedProcess.stdout.splitlines()
status = lines[len(lines)-1].decode("utf-8")
if not status == "success":
raise ValueError(f"""failed to destroy vm {id} for {email} on {current_app.config["SPOKE_HOST_ID"]}:
stdout:
{completedProcess.stdout}
stderr:
{completedProcess.stderr}
""")
def vm_state_command(self, email: str, id: str, command: str):
validate_capsul_id(id)
if command not in ["stop", "force-stop", "start", "restart"]:
raise ValueError(f"command ({command}) must be one of stop, force-stop, start, or restart")
completedProcess = run([join(current_app.root_path, f"shell_scripts/{command}.sh"), id], capture_output=True)
self.validate_completed_process(completedProcess, email)
returned_string = completedProcess.stdout.decode("utf-8")
current_app.logger.info(f"{command} vm {id} for {email} returned: {returned_string}")
def net_set_dhcp(self, email: str, host_id: str, network_name: str, macs: list, remove_ipv4: str, add_ipv4: str):
if not re.match(r"^[a-zA-Z0-9_-]+$", network_name):
raise ValueError(f"network_name \"{network_name}\" must match \"^[a-zA-Z0-9_-]+\"")
if not isinstance(macs, list):
raise ValueError(f"macs must be a list")
for mac in macs:
if not re.match(r"^[0-9a-f:]+$", mac):
raise ValueError(f"mac \"{mac}\" must match \"^[0-9a-f:]+$\"")
if remove_ipv4 != None and remove_ipv4 != "":
if not re.match(r"^[0-9.]+$", remove_ipv4):
raise ValueError(f"remove_ipv4 \"{remove_ipv4}\" must match \"^[0-9.]+$\"")
for mac in macs:
completedProcess = run([join(current_app.root_path, f"shell_scripts/ip-dhcp-host.sh"), "delete", network_name, mac, remove_ipv4], capture_output=True)
self.validate_completed_process(completedProcess, email)
if add_ipv4 != None and add_ipv4 != "":
if not re.match(r"^[0-9.]+$", add_ipv4):
raise ValueError(f"add_ipv4 \"{add_ipv4}\" must match \"^[0-9.]+$\"")
for mac in macs:
completedProcess = run([join(current_app.root_path, f"shell_scripts/ip-dhcp-host.sh"), "add", network_name, mac, add_ipv4], capture_output=True)
self.validate_completed_process(completedProcess, email)