def get_virtual_service(virtual_service_name: str, ns: str = "default",
version: str = "networking.istio.io/v1alpha3",
configuration: Configuration = None,
secrets: Secrets = None) -> Dict[str, Any]:
"""
Get a virtual service identified by `name`
See https://istio.io/docs/reference/config/istio.networking.v1alpha3/#VirtualService
""" # noqa: E501
api = create_k8s_api_client(configuration, secrets)
url = "/apis/{}/namespaces/{}/virtualservices/{}".format(
version, ns, virtual_service_name)
try:
data, status, headers = api.call_api(
url,
"GET",
header_params={
"Accept": "application/json"
},
auth_settings=['BearerToken'],
_preload_content=False
)
except ApiException as x:
body = x.body.read(decode_content=True)
if x.headers.get("Content-Type") == "application/json":
body = json.loads(body)
return {
"status": x.status,
"body": body,
"headers": dict(**x.headers)
}
return {
"status": status,
"body": json.loads(data.read(decode_content=True)),
"headers": dict(**headers)
}
def set_fault(
virtual_service_name: str,
routes: List[Dict[str, str]], # noqa: C901
fault: Dict[str, Any],
ns: str = "default",
version: str = "networking.istio.io/v1alpha3",
configuration: Configuration = None,
secrets: Secrets = None) -> Dict[str, Any]:
"""
Setfault injection on the virtual service identified by `name`
The `fault` argument must be the object passed as the `spec` property
of a virtual service resource.
If a fault already exists, it is updated with the new specification.
See https://istio.io/docs/reference/config/istio.networking.v1alpha3/#HTTPFaultInjection
""" # noqa: E501
result = get_virtual_service(virtual_service_name,
ns=ns,
version=version,
configuration=configuration,
secrets=secrets)
if result["status"] != 200:
raise ActivityFailed("Virtual Service '{}' does not exist: {}".format(
virtual_service_name, str(result["body"])))
# which destinations to we target?
expected_destinations = set()
for route in routes:
if "destination" in route:
destination = route["destination"]
expected_destinations.add(
(destination["host"], destination.get("subset")))
# inject a fault block into the targets
spec = deepcopy(result["body"]["spec"]["http"])
for i in spec:
if "route" in i:
for route in i["route"]:
if "destination" in route:
destination = route["destination"]
# not mandatory in response
# https://istio.io/latest/docs/reference/config/networking/virtual-service/#Destination # noqa: E501
target = (destination["host"], destination.get("subset"))
if target in expected_destinations:
i["fault"] = fault
break
api = create_k8s_api_client(configuration, secrets)
url = "/apis/{}/namespaces/{}/virtualservices/{}".format(
version, ns, virtual_service_name)
payload = {
"apiVersion": version,
"kind": "VirtualService",
"metadata": {
"name": virtual_service_name
},
"spec": {
"http": spec
}
}
try:
data, status, headers = api.call_api(
url,
"PATCH",
header_params={
"Content-Type": "application/merge-patch+json",
"Accept": "application/json"
},
body=payload,
auth_settings=['BearerToken'],
_preload_content=False)
except ApiException as x:
body = x.body
if x.headers.get("Content-Type") == "application/json":
body = json.loads(body)
return {"status": x.status, "body": body, "headers": dict(**x.headers)}
return {
"status": status,
"body": json.loads(data.read(decode_content=True)),
"headers": dict(**headers)
}
def unset_fault(virtual_service_name: str,
routes: List[Dict[str, str]],
ns: str = "default",
version: str = "networking.istio.io/v1alpha3",
configuration: Configuration = None,
secrets: Secrets = None) -> Dict[str, Any]:
"""
Unset fault injection from the virtual service identified by `name`
The `fault` argument must be the object passed as the `spec` property
of a virtual service resource.
See https://istio.io/docs/reference/config/istio.networking.v1alpha3/#HTTPFaultInjection
""" # noqa: E501
result = get_virtual_service(virtual_service_name,
ns=ns,
version=version,
configuration=configuration,
secrets=secrets)
if result["status"] != 200:
raise ActivityFailed("Virtual Service '{}' does not exist: {}".format(
virtual_service_name, str(result["body"])))
# which destinations to we target?
expected_destinations = set()
for route in routes:
if "destination" in route:
destination = route["destination"]
expected_destinations.add(
(destination["host"], destination["subset"]))
# remove fault block from the targets
destinations = set()
spec = deepcopy(result["body"]["spec"]["http"])
for i in spec:
if "route" in i:
for route in i["route"]:
if "destination" in route:
destination = route["destination"]
target = (destination["host"], destination["subset"])
if target in expected_destinations:
i.pop("fault", None)
api = create_k8s_api_client(configuration, secrets)
url = "/apis/{}/namespaces/{}/virtualservices/{}".format(
version, ns, virtual_service_name)
payload = {
"apiVersion": version,
"kind": "VirtualService",
"metadata": {
"name": virtual_service_name
},
"spec": {
"http": spec
}
}
data, status, headers = api.call_api(url,
"PATCH",
header_params={
"Content-Type":
"application/merge-patch+json",
"Accept": "application/json"
},
body=payload,
auth_settings=['BearerToken'],
_preload_content=False)
return {
"status": status,
"body": json.loads(data.read(decode_content=True)),
"headers": dict(**headers)
}