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#!/usr/bin/env python
# Copyright (c) 2020 Orange and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
"""
Define the parent for Kubernetes testing.
"""
from __future__ import division
import ast
import json
import logging
import time
import textwrap
import yaml
from kubernetes import client
from kubernetes import config
from kubernetes import watch
import pkg_resources
import prettytable
from xtesting.core import testcase
class SecurityTesting(testcase.TestCase):
# pylint: disable=too-many-instance-attributes
"""Run Security job"""
watch_timeout = 1200
__logger = logging.getLogger(__name__)
def __init__(self, **kwargs):
super(SecurityTesting, self).__init__(**kwargs)
config.load_kube_config()
self.corev1 = client.CoreV1Api()
self.batchv1 = client.BatchV1Api()
self.pod = None
self.pod_log = ""
self.job_name = None
self.output_log_name = 'functest-kubernetes.log'
self.output_debug_log_name = 'functest-kubernetes.debug.log'
self.namespace = ""
def deploy_job(self):
"""Run Security job
It runs a single security job and then simply prints its output asis.
"""
assert self.job_name
api_response = self.corev1.create_namespace(
client.V1Namespace(metadata=client.V1ObjectMeta(
generate_name="ims-")))
self.namespace = api_response.metadata.name
self.__logger.debug("create_namespace: %s", api_response)
# pylint: disable=bad-continuation
with open(pkg_resources.resource_filename(
"functest_kubernetes",
"security/{}.yaml".format(self.job_name))) as yfile:
body = yaml.safe_load(yfile)
api_response = self.batchv1.create_namespaced_job(
body=body, namespace=self.namespace)
self.__logger.info("Job %s created", api_response.metadata.name)
self.__logger.debug("create_namespaced_job: %s", api_response)
watch_job = watch.Watch()
for event in watch_job.stream(
func=self.batchv1.list_namespaced_job,
namespace=self.namespace, timeout_seconds=self.watch_timeout):
if (event["object"].metadata.name == self.job_name and
event["object"].status.succeeded == 1):
self.__logger.info(
"%s started in %0.2f sec", event['object'].metadata.name,
time.time()-self.start_time)
watch_job.stop()
pods = self.corev1.list_namespaced_pod(
self.namespace, label_selector='job-name={}'.format(self.job_name))
self.pod = pods.items[0].metadata.name
self.pod_log = self.corev1.read_namespaced_pod_log(
name=self.pod, namespace=self.namespace)
self.__logger.info("\n\n%s", self.pod_log)
def run(self, **kwargs):
assert self.job_name
self.start_time = time.time()
try:
self.deploy_job()
except client.rest.ApiException:
self.__logger.exception("Cannot run %s", self.job_name)
self.stop_time = time.time()
def clean(self):
if self.pod:
try:
api_response = self.corev1.delete_namespaced_pod(
name=self.pod, namespace=self.namespace)
self.__logger.debug("delete_namespaced_pod: %s", api_response)
except client.rest.ApiException:
pass
if self.job_name:
try:
api_response = self.batchv1.delete_namespaced_job(
name=self.job_name, namespace=self.namespace)
self.__logger.debug(
"delete_namespaced_deployment: %s", api_response)
except client.rest.ApiException:
pass
if self.namespace:
try:
api_response = self.corev1.delete_namespace(self.namespace)
self.__logger.debug("delete_namespace: %s", self.namespace)
except client.rest.ApiException:
pass
class KubeHunter(SecurityTesting):
"""kube-hunter hunts for security weaknesses in Kubernetes clusters.
See https://github.com/aquasecurity/kube-hunter for more details
"""
__logger = logging.getLogger(__name__)
def __init__(self, **kwargs):
super(KubeHunter, self).__init__(**kwargs)
self.job_name = "kube-hunter"
def process_results(self, **kwargs):
"""Process kube-hunter details"""
self.details = json.loads(self.pod_log.splitlines()[-1])
if self.details["vulnerabilities"]:
self.result = 100
msg = prettytable.PrettyTable(
header_style='upper', padding_width=5,
field_names=['category', 'vulnerability', 'severity'])
severity = kwargs.get("severity", "high")
if severity == "low":
allowed_severity = []
elif severity == "medium":
allowed_severity = ["low"]
elif severity == "high":
allowed_severity = ["low", "medium"]
else:
self.__logger.warning(
"Selecting high as default severity (%s is incorrect)",
kwargs.get("severity", "high"))
severity = "high"
allowed_severity = ["low", "medium"]
for vulnerability in self.details["vulnerabilities"]:
if vulnerability["severity"] in allowed_severity:
self.__logger.warning(
"Skipping %s (severity is configured as %s)",
vulnerability["vulnerability"], severity)
else:
self.result = 0
msg.add_row(
[vulnerability["category"], vulnerability["vulnerability"],
vulnerability["severity"]])
self.__logger.warning("\n\n%s\n", msg.get_string())
if self.details["hunter_statistics"]:
msg = prettytable.PrettyTable(
header_style='upper', padding_width=5,
field_names=['name', 'description', 'vulnerabilities'])
for statistics in self.details["hunter_statistics"]:
msg.add_row(
[statistics["name"],
textwrap.fill(statistics["description"], width=50),
statistics["vulnerabilities"]])
self.__logger.info("\n\n%s\n", msg.get_string())
def run(self, **kwargs):
super(KubeHunter, self).run(**kwargs)
try:
self.process_results(**kwargs)
except Exception: # pylint: disable=broad-except
self.__logger.exception("Cannot process results")
self.result = 0
class KubeBench(SecurityTesting):
"""kube-bench checks whether Kubernetes is deployed securelyself.
It runs the checks documented in the CIS Kubernetes Benchmark.
See https://github.com/aquasecurity/kube-bench for more details
"""
__logger = logging.getLogger(__name__)
def run(self, **kwargs):
self.job_name = "kube-bench-{}".format(kwargs.get("target", "node"))
super(KubeBench, self).run(**kwargs)
self.details["report"] = ast.literal_eval(self.pod_log)
msg = prettytable.PrettyTable(
header_style='upper', padding_width=5,
field_names=['node_type', 'version', 'test_desc', 'pass',
'fail', 'warn'])
for details in self.details["report"]:
for test in details['tests']:
msg.add_row(
[details['node_type'], details['version'], test['desc'],
test['pass'], test['fail'], test['warn']])
for result in test["results"]:
if result['scored'] and result['status'] == 'FAIL':
self.__logger.error(
"%s\n%s", result['test_desc'],
result['remediation'])
self.__logger.warning("Targets:\n\n%s\n", msg.get_string())
self.result = 100
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