def _platform_attach_volume(self, volume, instance):
"""
Attach a volume using the Google Cloud Platform API
Some specific steps are performed here:
- Device name (the name assigned to this device visible through the VM OS)
- Mount mode (read only or read write)
- Disk interface (SCSI or NVME)
Args:
volume (<volume>): The volume to attach
instance (<instance>): The instance where the volume is to be attached
Returns:
bool: True if the volume is attached successfully, False otherwise
"""
# Ask for mount ro/rw
ro_rw = SimpleTUI.input_dialog(
"Mount mode",
question="Specify a mount mode (READ_WRITE, READ_ONLY)",
return_type=str,
regex="^(READ_WRITE|READ_ONLY)$")
if ro_rw is None:
return
# Ask for disk interface
interface = SimpleTUI.input_dialog(
"Disk interface",
question="Specify disk interface (SCSI, NVME)",
return_type=str,
regex="^(SCSI|NVME)$")
return self.gcp_client.attach_volume(node=instance,
volume=volume,
device=volume.name,
ex_boot=False,
ex_auto_delete=False,
ex_interface=interface)
def _platform_detach_volume(self, volume):
"""
Detach a volume using the Google Cloud Platform API
Some specific steps are performed here:
- Check if the selected volume is a boot disk
Args:
volume (<volume>): The volume to detach
Returns:
bool: True if the volume is successfully detached, False otherwise
"""
# Search for the instance the volume is attached to
instance = self._get_instance_from_volume(volume)
if instance is None:
return False
if not self._is_volume_removable(volume):
SimpleTUI.msg_dialog(
"Detaching status",
"This volume is mounted as boot disk and cannot be detached until the VM is stopped!",
SimpleTUI.DIALOG_ERROR)
return
result = self.gcp_client.detach_volume(volume, instance)
if result:
while True:
# No direct way to refresh a Volume status, so we look if
# it is still attached to its previous instance
updated_volume = self.gcp_client.ex_get_volume(volume.name)
if not self._platform_is_volume_attached(updated_volume):
break
time.sleep(3)
return result
def close(self, code):
"""
Close the application
Args:
code (int): an exit code (0 for normal termination)
"""
SimpleTUI.clear_console()
exit(code)
def print_global_floating_ips(self):
"""
Print ip and other useful information of all floating ip available in each region
"""
table_header = [
"ID", "Public Ip", "Floating IP ID", "Associated Instance",
"Region"
]
table_body = self._list_global_floating_ips()
SimpleTUI.print_table(table_header, table_body)
if len(self.global_floating_ips) == 0:
SimpleTUI.info("There are no floating IPs available")
return len(self.global_floating_ips)
def print_global_instances(self):
"""
Print instance id, image id, IP address and state for each active instance in each region
"""
table_header = [
"ID", "Instance Name", "Instance ID", "IP address", "Status",
"Key Name", "Avail. Zone"
]
table_body = self._list_global_instances()
SimpleTUI.print_table(table_header, table_body)
if len(self.global_instances) == 0:
SimpleTUI.info("There are no running or pending instances")
return len(self.global_instances)
def print_global_volumes(self):
"""
Print all the available volumes for each region and some informations
"""
table_header = [
"ID", "Volume Name", "Volume ID", "Creation", "Size (GB)",
"Attached To", "Status", "Avail. Zone"
]
table_body = self._list_global_volumes()
SimpleTUI.print_table(table_header, table_body)
if len(self.global_volumes) == 0:
SimpleTUI.info("There are no volumes available")
return len(self.global_volumes)
def promote_ephimeral_ip(self):
"""
Promote an Ephimeral IP to a Static one
For more infos about Ephimeral/Static IPs on GCP, please visit
https://cloud.google.com/compute/docs/ip-addresses/
"""
# Select an instance
floating_ip = None
while (True):
instance_index = SimpleTUI.list_dialog(
"Instances available",
self.print_all_instances,
question=
"Select the instance which floating IP has to be promoted to \"static\""
)
if instance_index is None:
return
instance = self.instances[instance_index - 1]
# Check if the instance has an IP assigned (e.g. no IP is assigned while stopped)
if len(instance.public_ips) == 0 or None in instance.public_ips:
SimpleTUI.msg_dialog(
"Promotion status",
"This instance has no available floating IPs to promote!",
SimpleTUI.DIALOG_ERROR)
# Check if the instance has already a static IP assigned
elif self._is_instance_floating_ip_static(instance):
SimpleTUI.msg_dialog(
"Promotion status",
"This instance floating IP is already promoted to \"static\"!",
SimpleTUI.DIALOG_ERROR)
# Continue the ephimeral to static conversion
else:
floating_ip = instance.public_ips[0]
break
# Specify address name
address_name = SimpleTUI.input_dialog(
"Static Floating IP Name",
question="Specify a name for the new Static Floating IP",
return_type=str,
regex="^[a-zA-Z0-9-]+$")
if address_name is None:
return
if self._promote_ephimeral_ip_to_static(floating_ip, address_name):
SimpleTUI.msg_dialog("Static Floating IP Promotion",
"Floating IP promoted!",
SimpleTUI.DIALOG_SUCCESS)
else:
SimpleTUI.msg_dialog(
"Static Floating IP Promotion",
"There was an error while promoting this Floating IP!",
SimpleTUI.DIALOG_ERROR)
def print_all_nics(self):
"""
Print instance id, image id, IP address and state for each active instance
! NOTE: before using this method, please set an instance using self.instance = <instance> !
Returns:
int: the number of items printed
"""
table_header = ["ID", "NIC Name"]
table_body = self._list_all_nics()
SimpleTUI.print_table(table_header, table_body)
if len(self.instances) == 0:
SimpleTUI.info("There are no NICs available for this instance")
return len(self.instances)
def _platform_override_menu(self, menu, choice):
"""
Override a menu voice
Args:
menu (str): a menu identifier
choice (int): a menu entry index
Returns:
int: 0 for normal, 1 for going back to the main menu of EasyCloud,
2 for closing the whole application
"""
if menu == "floating_ips":
if choice == 5: # Detach floating ip
SimpleTUI.msg_dialog(
"Detach Floating IP",
"Detaching an IP address from an instance is not supported on GCP: \n"
+
"an instance must always have an IP associated while running.\n"
+
"However, you can assign another address to the desired instance to\n"
+ "replace the current one.", SimpleTUI.DIALOG_INFO)
return 0
SimpleTUI.error("Unavailable choice!")
SimpleTUI.pause()
SimpleTUI.clear_console()
pass
def load_all_modules(self, no_libs_check):
"""
Loads all the Modules from the modules folder
"""
_all_modules = list(iter_modules(modules.__path__))
for _module in _all_modules:
module_object = Module(_module[1])
try:
if no_libs_check or self.check_dependencies(module_object):
module_object.load_manager_class()
self.loaded_modules.append(module_object)
except ImportError as e:
SimpleTUI.msg_dialog("Missing packages", "There was an error while importing a package for the\n" +
module_object.platform_name + " module: \n\n" + str(e) + "\n\n" +
"This module won't be loaded.", SimpleTUI.DIALOG_ERROR)
def _platform_extra_menu(self):
"""
Print the extra Functions Menu (specific for each platform)
"""
while (True):
menu_header = self.platform_name + " Extra Commands"
menu_subheader = [
"Region: \033[1;94m" + self._platform_get_region() + "\033[0m"
]
menu_items = [
"Promote ephimeral IP to static", "Demote a static IP",
"List instances for all the regions",
"List volumes for all the regions",
"List floating ips for all the regions",
"Back to the Main Menu"
]
choice = SimpleTUI.print_menu(menu_header, menu_items,
menu_subheader)
if choice == 1: # Promote IP
self.promote_ephimeral_ip()
elif choice == 2: # Demote IP
answer = SimpleTUI.yn_dialog(
"Demotion status",
"You can demote a static IP easily deleting it through \"Manage floating IPs\" > \"Release a reserved Floating IP\".\n"
+
"NOTE: the static IP won't be removed from the associated instance until the latter is stopped/rebooted/deleted.\n"
+
"For more infos about Ephimeral/Static IPs on GCP, please visit https://cloud.google.com/compute/docs/ip-addresses/.\n"
+
"Would you like to start the \"Release a reserved Floating IP\" wizard now?",
SimpleTUI.DIALOG_INFO)
if answer:
self.release_floating_ip()
elif choice == 3: # List all the instances (Global)
SimpleTUI.list_dialog("Instances available (Global view)",
list_printer=self.print_global_instances)
elif choice == 4: # List all the volumes (Global)
SimpleTUI.list_dialog("Volumes available (Global view)",
list_printer=self.print_global_volumes)
elif choice == 5: # List all the floating ips (Global)
SimpleTUI.list_dialog(
"Floating IPs available (Global view)",
list_printer=self.print_global_floating_ips)
elif choice == 6:
break
else:
SimpleTUI.msg_dialog("Error", "Unimplemented functionality",
SimpleTUI.DIALOG_ERROR)
def _platform_create_new_instance(self,
instance_name,
image,
instance_type,
monitor_cmd_queue=None):
"""
Create a new instance using the Google Cloud Platform API
Args:
instance_name (str): The name of the instance
image (<image_type>): The image to be used as a base system
instance_type (<instance_type>): The VM flavor
monitor_cmd_queue: the monitor commands Quue
"""
# Creation summary
print("\n--- Creating a new instance with the following properties:")
print("- %-20s %-30s" % ("Name", instance_name))
print("- %-20s %-30s" % ("Image", image.name))
print("- %-20s %-30s" % ("Instance Type", instance_type.name))
# ask for confirm
print("")
if (SimpleTUI.user_yn("Are you sure?")):
instance = self.gcp_client.create_node(name=instance_name,
size=instance_type,
image=image)
if instance is None:
return False
if monitor_cmd_queue is not None and self.is_monitor_running():
monitor_cmd_queue.put({
"command": "add",
"instance_id": instance.id
})
return True
def ask_for_data(self,
section_name,
param_name,
return_type=None,
regex=None):
"""
Ask for user input if a parameter is not defined
Args:
param_name (str): the name of the missing parameter
return_type (<return_type>, optional): the return type assigned to user input
regex (str): the regular expression the input must follow
Returns:
<return_type>: user input of type <return_type>
"""
return SimpleTUI.input_dialog(
"Missing value",
question=
"A parameter required by this module has not been defined in settings.cfg!\n"
"Please, define a value to assign to \"" + param_name + "\" (\"" +
section_name + "\" section)",
return_type=return_type,
regex=regex,
pause_on_exit=False,
cannot_quit=True)
def _platform_create_volume(self, volume_name, volume_size):
"""
Create a new volume using the Google Cloud Platform API
Some specific steps are performed here:
- Volume type (pd-standard or pd-ssd)
Args:
volume_name (str): Volume name
volume_size (int): Volume size in GB
Returns:
bool: True if the volume is successfully created, False otherwise
"""
# Volume type
volume_type = SimpleTUI.input_dialog(
"Volume type",
question="Specify the volume type (pd-standard, pd-ssd)",
return_type=str,
regex="^(pd-standard|pd-ssd)$")
if volume_type is None:
return
# Volume creation
return self.gcp_client.create_volume(size=volume_size,
name=volume_name,
ex_disk_type=volume_type)
def _platform_create_volume(self, volume_name, volume_size):
"""
Create a new volume using the Amazon Web Services API
Some specific steps are performed here:
- Volume type (standard or io1)
- IOPS (only if io1 is selected)
- Zone selection (required)
Args:
volume_name (str): Volume name
volume_size (int): Volume size in GB
Returns:
bool: True if the volume is successfully created, False otherwise
"""
# Volume type
volume_type = SimpleTUI.input_dialog(
"Volume type",
question="Specify the volume type (standard, io1)",
return_type=str,
regex="^(standard|io1)$")
if volume_type is None:
return
# IOPS
iops = None
if volume_type == "io1":
iops = SimpleTUI.input_dialog(
"IOPS limit",
question=
"Specify the number of IOPS (I/O operations per second) the volume has to support",
return_type=int)
if iops is None:
return
# Zone selection
zone_index = SimpleTUI.list_dialog(
"Zones available",
self.print_all_availability_zones,
question="Select a zone where the volume will be created")
if zone_index is None:
return
zone = self.avail_zones[zone_index - 1]
# Volume creation
return self.ec2_client.create_volume(name=volume_name,
size=volume_size,
location=zone,
ex_volume_type=volume_type,
ex_iops=iops)
def _platform_extra_menu(self):
"""
Print the extra Functions Menu (specific for each platform)
"""
while (True):
menu_header = self.platform_name + " Extra Commands"
menu_subheader = [
"Region: \033[1;94m" + self._platform_get_region() + "\033[0m"
]
menu_items = ["Back to the Main Menu"]
choice = SimpleTUI.print_menu(menu_header, menu_items,
menu_subheader)
# if choice == 1 and self._is_barebone(): # Blazar menu
if choice == 1:
break
else:
SimpleTUI.msg_dialog("Error", "Unimplemented functionality",
SimpleTUI.DIALOG_ERROR)
def _platform_delete_volume(self, volume):
"""
Delete a volume using the Google Cloud Platform API
Some specific steps are performed here:
- Check if the selected volume is a boot disk
Args:
volume (<volume>): The volume to delete
Returns:
bool: True if the volume is successfully deleted, False otherwise
"""
if not self._is_volume_removable(volume):
SimpleTUI.msg_dialog(
"Volume deletion",
"This volume is mounted as boot disk and cannot be detached until the VM is stopped!",
SimpleTUI.DIALOG_ERROR)
return
return self.gcp_client.destroy_volume(volume)
def get_instance(self, manager_class):
"""
Returns an existing instance of the manager_class provided in input
if previously instantiated or creates a new instance.
Args:
manager_class (<manager_class>): class of the module manager
Returns:
<manager_class_instance>: an instance of <manager_class>
"""
for _instance in self.loaded_instances:
if isinstance(_instance, manager_class):
return _instance
try:
_new_instance = manager_class()
self.loaded_instances.append(_new_instance)
return _new_instance
except Exception as e:
SimpleTUI.exception_dialog(e)
return None
def menu(self):
"""
Prints the modules menu
"""
global kill
while True:
# Header creation
menu_header = "******************** EasyCloud ********************"
# Subheader creation
disclaimer = "\033[34;1mThis is a proof-of-concept build, not suitable\nfor production use.\033[0m\n"
debug_status = None
hffr_status = None
if "LIBCLOUD_DEBUG" in environ:
debug_status = "\033[93mLibcloud Debug Mode ON\033[0m"
else:
debug_status = "\033[90mLibcloud Debug Mode OFF\033[0m"
if "LIBCLOUD_DEBUG_PRETTY_PRINT_RESPONSE" in environ and environ["LIBCLOUD_DEBUG_PRETTY_PRINT_RESPONSE"] == "1":
hffr_status = "\033[93mLibcloud Human friendly formatted response ON\033[0m"
else:
hffr_status = "\033[90mLibcloud Human friendly formatted response OFF\033[0m"
menu_subheader = [disclaimer, debug_status, hffr_status]
# Menu items creation
menu_items = []
for module in self.loaded_modules:
menu_items.append(module.platform_name)
menu_items.append("Close application")
# Menu print
choice = SimpleTUI.print_menu(menu_header, menu_items,
subheader_items=menu_subheader,
custom_question="Select a platform")
try:
if(choice >= 1 and choice <= len(self.loaded_modules)):
return self.loaded_modules[choice - 1] # Load a module
elif(choice == len(self.loaded_modules) + 1): # Close application
self.close(0)
else:
SimpleTUI.msg_dialog("Error", "Unimplemented functionality", SimpleTUI.DIALOG_ERROR)
except Exception as e:
SimpleTUI.exception_dialog(e)
def start(self, no_libs_check=False):
"""
Main application loop
"""
# Resize the console window
SimpleTUI.resize_console(30, 120)
# Load all the modules
self.load_all_modules(no_libs_check=no_libs_check)
# Loop
exit = False
while(not exit):
SimpleTUI.set_console_title("EasyCloud")
platform = self.menu()
manager = self.get_instance(platform.manager_class)
try:
close = False
while(not close):
action = manager.menu()
# if action == 0: # Ignore this value
# pass
if action == 1: # Close current manager menu
close = True
elif action == 2: # Close this application
close = True
exit = True
except Exception as e:
SimpleTUI.exception_dialog(e)
self.close(0)
def _platform_reserve_floating_ip(self):
"""
Reserve a floating IP using the Google Cloud Platform API
"""
address_name = SimpleTUI.input_dialog(
"Floating IP Name",
question="Specify a name for the new Floating IP",
return_type=str,
regex="^[a-zA-Z0-9-]+$")
if address_name is None:
return
if self.gcp_client.ex_create_address(name=address_name):
return True
return False
def check_dependencies(self, module):
"""
Check if all the dependencies (pip packages) are satisfied for
a certain module, and can install them if the user approves
Args:
module (Module): a module object (no manager class must be loaded
through load_manager_class method of this object)
Returns:
bool: the result of the check
"""
required_packages = getattr(module, "dependencies")
installed_packages = subprocess.check_output(['pip3', 'list', '--format=json'], stderr=subprocess.STDOUT).decode()
missing_packages_names = [] # package names displayed to the user
missing_packages_commands = [] # packages names/urls passed to pip3
for required_package in required_packages:
# Format: pip-package-name:package-url|package-git (the latter is optional)
#
# Symbolic: pip package name (the one you see with "pip3 list")
# Package URL (optional): package url from where pip3 will download the library
# Package Git (optional): package git url in the form git+git://github.com/my_user/my_project.git(@branch)
#
# e.g. libcloud:apache-libcloud
required_package_data = required_package.split(":", 1)
if required_package_data[0] not in installed_packages:
missing_packages_names.append(required_package_data[0])
if len(required_package_data) == 2:
missing_packages_commands.append(required_package_data[1])
else:
missing_packages_commands.append(required_package_data[0])
if len(missing_packages_names) > 0:
packages_list = ""
for missing_package_name in missing_packages_names:
packages_list += "- " + missing_package_name + "\n"
choice = SimpleTUI.yn_dialog("Missing packages", "The following packages are required by the " + module.platform_name + " module:\n" +
"\n" + packages_list + "\nIf these packages are not installed, this module won't be loaded.\n" +
"Do you want to install them through pip?", warning=True)
if choice:
SimpleTUI.msg_dialog("Library installer", "Installing the required libraries, this can take a bit...",
SimpleTUI.DIALOG_INFO, pause_on_exit=False, clear_on_exit=False)
if self.install_libraries(missing_packages_commands):
SimpleTUI.msg_dialog("Library installer", "All the packages for " + module.platform_name + "\n" +
"were successfully installed!\n\n" + packages_list, SimpleTUI.DIALOG_SUCCESS)
return True
else:
SimpleTUI.msg_dialog("Library installer", "There was an error while installing the missing packages\n" +
"for " + module.platform_name + ".\n"
"Please check logs" + sep + "installer.log in the main directory for details.", SimpleTUI.DIALOG_ERROR)
return False
return False
return True
def _platform_attach_volume(self, volume, instance):
"""
Attach a volume using the Amazon Web Services API
Some specific steps are performed here:
- Exposure point (e.g. /dev/sdb)
Args:
volume (<volume>): The volume to attach
instance (<instance>): The instance where the volume is to be attached
Returns:
bool: True if the volume is attached successfully, False otherwise
"""
# Ask for exposure point (the GNU/Linux device where this volume will
# be available)
exposure_point = SimpleTUI.input_dialog(
"Exposure point",
question="Specify where the device is exposed, e.g. ‘/dev/sdb’",
return_type=str,
regex="^(/[^/ ]*)+/?$")
if exposure_point is None:
return
return self.ec2_client.attach_volume(instance, volume, exposure_point)
def _platform_create_new_instance(self,
instance_name,
image,
instance_type,
monitor_cmd_queue=None):
"""
Create a new instance using the Amazon Web Services API
Some specific steps are performed here:
- Ask for security group
- Ask for key pair
- Instance creation summary
Args:
instance_name (str): The name of the instance
image (<image_type>): The image to be used as a base system
instance_type (<instance_type>): The VM flavor
monitor_cmd_queue: the monitor commands Quue
"""
# 5. Security Group
security_group_index = SimpleTUI.list_dialog(
"Security Groups available",
self.print_all_security_groups,
question="Select security group")
if security_group_index is None:
return
security_group = self.security_groups[security_group_index - 1]
# 6. Key Pair
key_pair_index = SimpleTUI.list_dialog("Key Pairs available",
self.print_all_key_pairs,
question="Select key pair")
if key_pair_index is None:
return
key_pair = self.key_pairs[key_pair_index - 1]
# Creation summary
print("\n--- Creating a new instance with the following properties:")
print("- %-20s %-30s" % ("Name", instance_name))
print("- %-20s %-30s" % ("Image", image.name))
print("- %-20s %-30s" % ("Instance Type", instance_type.name))
print("- %-20s %-30s" % ("Key Pair", key_pair.name))
print("- %-20s %-30s" % ("Security Group", security_group))
# ask for confirm
print("")
if (SimpleTUI.user_yn("Are you sure?")):
instance = self.ec2_client.create_node(
name=instance_name,
image=image,
size=instance_type,
ex_keyname=key_pair.name,
ex_security_groups=[security_group],
ex_monitoring=True,
ex_mincount=1,
ex_maxcount=1)
if instance is None:
return False
if monitor_cmd_queue is not None and self.is_monitor_running():
monitor_cmd_queue.put({
"command": "add",
"instance_id": instance.id
})
return True
def _platform_associate_floating_ip(self, floating_ip, instance):
"""
Associate a floating IP to an instance using the Google Cloud Platform API
Some specific steps are performed here:
- NIC (Network interface controller) selection
- Access config name
Args:
floating_ip (GCEAddress): The floating IP to attach
instance (Node): The instance where the floating IP is to be assigned
Returns:
bool: True if the floating IP is successfully associated, False otherwise
"""
# Set an instance, as required by print_all_nics()
self.current_instance = instance
nic_index = SimpleTUI.list_dialog(
"NICs available",
self.print_all_nics,
question="Select the VM NIC to assign this IP")
if nic_index is None:
return
nic = instance.extra["networkInterfaces"][
nic_index - 1] # serve nome per rimuovere
# Check if there's already an active Access Configuration and ask the user for confirm
remove_old_access_config = False
if self._nic_has_access_config(nic):
choice = SimpleTUI.yn_dialog(
"Access Configuration Overwrite",
"Warning: there's already an access configuration associated to this NIC.\n"
+
"Do you really want to continue (the current access configuration will be overwritten)?",
warning=True)
if not choice:
return
remove_old_access_config = True
# Access Configuration name
access_config_name = SimpleTUI.input_dialog(
"Access configuration",
question="Specify an access configuration name",
return_type=str,
regex="^[a-zA-Z0-9-]+$")
if access_config_name is None:
return
# Remove the old access configuration if it's already existing
if remove_old_access_config:
SimpleTUI.msg_dialog("Access Configuration Overwrite",
"Removing old access configuration...",
SimpleTUI.DIALOG_INFO,
pause_on_exit=False,
clear_on_exit=False)
if not self._delete_access_config(instance, nic):
SimpleTUI.msg_dialog(
"Access Configuration Overwrite",
"There was an error while removing the current access configuration!",
SimpleTUI.DIALOG_ERROR)
return
# Associate the Access Configuration to the NIC
if self.gcp_client.ex_add_access_config(node=instance,
name=access_config_name,
nic=nic,
nat_ip=floating_ip.address,
config_type="ONE_TO_ONE_NAT"):
return True
return False