gns3-server/gns3server/endpoints/compute/docker_nodes.py

# -*- coding: utf-8 -*-
#
# Copyright (C) 2020 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""
API endpoints for Docker nodes.
"""

import os

from fastapi import APIRouter, WebSocket, Depends, Body, status
from fastapi.encoders import jsonable_encoder
from fastapi.responses import StreamingResponse
from uuid import UUID

from gns3server.endpoints import schemas
from gns3server.compute.docker import Docker
from gns3server.compute.docker.docker_vm import DockerVM

router = APIRouter()

responses = {
    404: {"model": schemas.ErrorMessage, "description": "Could not find project or Docker node"}
}


def dep_node(project_id: UUID, node_id: UUID):
    """
    Dependency to retrieve a node.
    """

    docker_manager = Docker.instance()
    node = docker_manager.get_node(str(node_id), project_id=str(project_id))
    return node


@router.post("",
             response_model=schemas.Docker,
             status_code=status.HTTP_201_CREATED,
             responses={409: {"model": schemas.ErrorMessage, "description": "Could not create Docker node"}})
async def create_docker_node(project_id: UUID, node_data: schemas.DockerCreate):
    """
    Create a new Docker node.
    """

    docker_manager = Docker.instance()
    node_data = jsonable_encoder(node_data, exclude_unset=True)
    container = await docker_manager.create_node(node_data.pop("name"),
                                                 str(project_id),
                                                 node_data.get("node_id"),
                                                 image=node_data.pop("image"),
                                                 start_command=node_data.get("start_command"),
                                                 environment=node_data.get("environment"),
                                                 adapters=node_data.get("adapters"),
                                                 console=node_data.get("console"),
                                                 console_type=node_data.get("console_type"),
                                                 console_resolution=node_data.get("console_resolution", "1024x768"),
                                                 console_http_port=node_data.get("console_http_port", 80),
                                                 console_http_path=node_data.get("console_http_path", "/"),
                                                 aux=node_data.get("aux"),
                                                 aux_type=node_data.pop("aux_type", "none"),
                                                 extra_hosts=node_data.get("extra_hosts"),
                                                 extra_volumes=node_data.get("extra_volumes"),
                                                 memory=node_data.get("memory", 0),
                                                 cpus=node_data.get("cpus", 0))
    for name, value in node_data.items():
        if name != "node_id":
            if hasattr(container, name) and getattr(container, name) != value:
                setattr(container, name, value)

    return container.__json__()


@router.get("/{node_id}",
            response_model=schemas.Docker,
            responses=responses)
def get_docker_node(node: DockerVM = Depends(dep_node)):
    """
    Return a Docker node.
    """

    return node.__json__()


@router.put("/{node_id}",
            response_model=schemas.Docker,
            responses=responses)
async def update_docker(node_data: schemas.DockerUpdate, node: DockerVM = Depends(dep_node)):
    """
    Update a Docker node.
    """

    props = [
        "name", "console", "console_type", "aux", "aux_type", "console_resolution",
        "console_http_port", "console_http_path", "start_command",
        "environment", "adapters", "extra_hosts", "extra_volumes",
        "memory", "cpus"
    ]

    changed = False
    node_data = jsonable_encoder(node_data, exclude_unset=True)
    for prop in props:
        if prop in node_data and node_data[prop] != getattr(node, prop):
            setattr(node, prop, node_data[prop])
            changed = True
    # We don't call container.update for nothing because it will restart the container
    if changed:
        await node.update()
    node.updated()
    return node.__json__()


@router.post("/{node_id}/start",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def start_docker_node(node: DockerVM = Depends(dep_node)):
    """
    Start a Docker node.
    """

    await node.start()


@router.post("/{node_id}/stop",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def stop_docker_node(node: DockerVM = Depends(dep_node)):
    """
    Stop a Docker node.
    """

    await node.stop()


@router.post("/{node_id}/suspend",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def suspend_docker_node(node: DockerVM = Depends(dep_node)):
    """
    Suspend a Docker node.
    """

    await node.pause()


@router.post("/{node_id}/reload",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def reload_docker_node(node: DockerVM = Depends(dep_node)):
    """
    Reload a Docker node.
    """

    await node.restart()


@router.post("/{node_id}/pause",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def pause_docker_node(node: DockerVM = Depends(dep_node)):
    """
    Pause a Docker node.
    """

    await node.pause()


@router.post("/{node_id}/unpause",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def unpause_docker_node(node: DockerVM = Depends(dep_node)):
    """
    Unpause a Docker node.
    """

    await node.unpause()


@router.delete("/{node_id}",
               status_code=status.HTTP_204_NO_CONTENT,
               responses=responses)
async def delete_docker_node(node: DockerVM = Depends(dep_node)):
    """
    Delete a Docker node.
    """

    await node.delete()


@router.post("/{node_id}/duplicate",
             response_model=schemas.Docker,
             status_code=status.HTTP_201_CREATED,
             responses=responses)
async def duplicate_docker_node(destination_node_id: UUID = Body(..., embed=True), node: DockerVM = Depends(dep_node)):
    """
    Duplicate a Docker node.
    """

    new_node = await Docker.instance().duplicate_node(node.id, str(destination_node_id))
    return new_node.__json__()


@router.post("/{node_id}/adapters/{adapter_number}/ports/{port_number}/nio",
             status_code=status.HTTP_201_CREATED,
             response_model=schemas.UDPNIO,
             responses=responses)
async def create_nio(adapter_number: int,
                     port_number: int,
                     nio_data: schemas.UDPNIO,
                     node: DockerVM = Depends(dep_node)):
    """
    Add a NIO (Network Input/Output) to the node.
    The port number on the Docker node is always 0.
    """

    nio = Docker.instance().create_nio(jsonable_encoder(nio_data, exclude_unset=True))
    await node.adapter_add_nio_binding(adapter_number, nio)
    return nio.__json__()


@router.put("/{node_id}/adapters/{adapter_number}/ports/{port_number}/nio",
            status_code=status.HTTP_201_CREATED,
            response_model=schemas.UDPNIO,
            responses=responses)
async def update_nio(adapter_number: int,
                     port_number: int, nio_data: schemas.UDPNIO,
                     node: DockerVM = Depends(dep_node)):
    """
    Update a NIO (Network Input/Output) on the node.
    The port number on the Docker node is always 0.
    """

    nio = node.get_nio(adapter_number)
    if nio_data.filters:
        nio.filters = nio_data.filters
    await node.adapter_update_nio_binding(adapter_number, nio)
    return nio.__json__()


@router.delete("/{node_id}/adapters/{adapter_number}/ports/{port_number}/nio",
               status_code=status.HTTP_204_NO_CONTENT,
               responses=responses)
async def delete_nio(adapter_number: int, port_number: int, node: DockerVM = Depends(dep_node)):
    """
    Delete a NIO (Network Input/Output) from the node.
    The port number on the Docker node is always 0.
    """

    await node.adapter_remove_nio_binding(adapter_number)


@router.post("/{node_id}/adapters/{adapter_number}/ports/{port_number}/start_capture",
             responses=responses)
async def start_capture(adapter_number: int,
                        port_number: int,
                        node_capture_data: schemas.NodeCapture,
                        node: DockerVM = Depends(dep_node)):
    """
    Start a packet capture on the node.
    The port number on the Docker node is always 0.
    """

    pcap_file_path = os.path.join(node.project.capture_working_directory(), node_capture_data.capture_file_name)
    await node.start_capture(adapter_number, pcap_file_path)
    return {"pcap_file_path": str(pcap_file_path)}


@router.post("/{node_id}/adapters/{adapter_number}/ports/{port_number}/stop_capture",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def stop_capture(adapter_number: int, port_number: int, node: DockerVM = Depends(dep_node)):
    """
    Stop a packet capture on the node.
    The port number on the Docker node is always 0.
    """

    await node.stop_capture(adapter_number)


@router.get("/{node_id}/adapters/{adapter_number}/ports/{port_number}/pcap",
            responses=responses)
async def stream_pcap_file(adapter_number: int, port_number: int, node: DockerVM = Depends(dep_node)):
    """
    Stream the pcap capture file.
    The port number on the Docker node is always 0.
    """

    nio = node.get_nio(adapter_number)
    stream = Docker.instance().stream_pcap_file(nio, node.project.id)
    return StreamingResponse(stream, media_type="application/vnd.tcpdump.pcap")


@router.websocket("/{node_id}/console/ws")
async def console_ws(websocket: WebSocket, node: DockerVM = Depends(dep_node)):
    """
    Console WebSocket.
    """

    await node.start_websocket_console(websocket)


@router.post("/{node_id}/console/reset",
             status_code=status.HTTP_204_NO_CONTENT,
             responses=responses)
async def reset_console(node: DockerVM = Depends(dep_node)):

    await node.reset_console()