Source code for tvb.storage.kube.kube_notifier

# -*- coding: utf-8 -*-
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"""
Service layer used for Kubernetes calls.

.. moduleauthor:: Lia Domide <lia.domide@codemart.ro>
.. moduleauthor:: Bogdan Valean <bogdan.valean@codemart.ro>
"""

import requests
from kubernetes.config import incluster_config
from tvb.basic.logger.builder import get_logger
from tvb.basic.profile import TvbProfile

LOGGER = get_logger(__name__)




class KubeNotifier(object):



    @staticmethod
    def do_rest_call_to_pod(rest_app_server, rest_method_name, submit_param,
                            auth_header=None, data=None):

        LOGGER.info("Notifying POD {} method {} for param {} and data {}".format(rest_app_server, rest_method_name,
                                                                                 submit_param, data))
        if auth_header is None:
            auth_header = KubeNotifier.get_authorization_header()

        protocol = 'https' if TvbProfile.current.web.IS_CLOUD_HTTPS else 'http'
        url_pattern = "{}://{}:{}/kube/{}/{}"
        url_filled = url_pattern.format(protocol, rest_app_server, TvbProfile.current.web.SERVER_PORT,
                                        rest_method_name, submit_param)
        if data is None:
            return requests.get(url=url_filled, headers=auth_header)

        return requests.post(url=url_filled, headers=auth_header, data=data)


    @staticmethod
    def _get_authorization_token():
        kube_config = incluster_config.InClusterConfigLoader(
            token_filename=incluster_config.SERVICE_TOKEN_FILENAME,
            cert_filename=incluster_config.SERVICE_CERT_FILENAME,
            try_refresh_token=True)
        kube_config.load_and_set(None)
        return kube_config.token



    @staticmethod
    def get_authorization_header():
        token = KubeNotifier._get_authorization_token()
        return {"Authorization": "{}".format(token)}




    @staticmethod
    def check_token(authorization_token):
        expected_token = KubeNotifier._get_authorization_token()
        assert authorization_token == expected_token