def test_ClusterHost_matches_podGivenAndFromHostIsClusterHostsWithSupersetLabelsOfPod_returnsFalse(
):
test_host = ClusterHost("default", {"app": "web", "load": "high"})
meta = k8s.client.V1ObjectMeta(namespace=test_host.namespace,
labels={"app": test_host.pod_labels["app"]})
non_matching_pod = k8s.client.V1Pod(metadata=meta)
assert test_host.matches(non_matching_pod) is False
def _find_or_create_cluster_resources_for_cases(self, cases_dict,
api: k8s.client.CoreV1Api):
resolved_cases = {}
from_host_mappings = {}
to_host_mappings = {}
port_mappings = {}
for from_host_string, target_dict in cases_dict.items():
from_host = Host.from_identifier(from_host_string)
self.logger.debug("Searching pod for host %s", from_host)
if not isinstance(from_host, (ClusterHost, GenericClusterHost)):
raise ValueError(
"Only ClusterHost and GenericClusterHost fromHosts are supported by this Orchestrator"
)
namespaces_for_host = self._find_or_create_namespace_for_host(
from_host, api)
from_host = ClusterHost(namespaces_for_host[0].metadata.name,
from_host.pod_labels)
self.logger.debug("Updated fromHost with found namespace: %s",
from_host)
pods_for_host = [
pod for pod in self._current_pods if from_host.matches(pod)
]
# create pod if none for fromHost is in cluster (and add it to podsForHost)
if not pods_for_host:
self.logger.debug("Creating dummy pod for host %s", from_host)
additional_labels = {
ROLE_LABEL: "from_host_dummy",
CLEANUP_LABEL: CLEANUP_ALWAYS,
}
# TODO replace 'dummy' with a more suitable name to prevent potential conflicts
container = k8s.client.V1Container(
image=self.oci_images["target"], name="dummy")
dummy = create_pod_manifest(from_host, additional_labels,
f"{PROJECT_PREFIX}-dummy-",
container)
resp = api.create_namespaced_pod(dummy.metadata.namespace,
dummy)
if isinstance(resp, k8s.client.V1Pod):
self.logger.debug("Dummy pod %s created succesfully",
resp.metadata.name)
pods_for_host = [resp]
self._current_pods.append(resp)
else:
self.logger.error("Failed to create dummy pod! Resp: %s",
resp)
else:
self.logger.debug("Pods matching %s already exist: ",
from_host, pods_for_host)
# resolve target names for fromHost and add them to resolved cases dict
pod_identifier = "%s:%s" % (
pods_for_host[0].metadata.namespace,
pods_for_host[0].metadata.name,
)
self.logger.debug("Mapped pod_identifier: %s", pod_identifier)
from_host_mappings[from_host_string] = pod_identifier
(
names_per_host,
port_names_per_host,
) = self._get_target_names_creating_them_if_missing(
target_dict, api)
to_host_mappings[from_host_string] = names_per_host
port_mappings[from_host_string] = port_names_per_host
resolved_cases[pod_identifier] = {
names_per_host[t]:
[port_names_per_host[t][p] for p in target_dict[t]]
for t in target_dict
}
return resolved_cases, from_host_mappings, to_host_mappings, port_mappings
def _get_target_names_creating_them_if_missing(self, target_dict,
api: k8s.client.CoreV1Api):
service_names_per_host = {}
port_dict_per_host = {}
for host_string in target_dict.keys():
host = Host.from_identifier(host_string)
if isinstance(host, GenericClusterHost):
self.logger.debug(
"Found GenericClusterHost %s,"
"Rewriting it to a ClusterHost in default namespace now.",
host,
)
host = ClusterHost("default", host.pod_labels)
if not isinstance(host, ClusterHost):
raise ValueError(
"Only ClusterHost targets are supported by this Orchestrator."
" Host: %s, hostString: %s" % (host, host_string))
self.logger.debug("Searching service for host %s", host)
services_for_host = [
svc for svc in self._current_services if host.matches(svc)
]
self.logger.debug(
"Found services %s for host %s ",
[svc.metadata for svc in services_for_host],
host,
)
rewritten_ports = self._rewrite_ports_for_host(
target_dict[host_string], services_for_host)
self.logger.debug("Rewritten ports: %s", rewritten_ports)
port_dict_per_host[host_string] = rewritten_ports
if not services_for_host:
gen_name = "%s-test-target-pod-" % PROJECT_PREFIX
target_container = k8s.client.V1Container(
image=self.oci_images["target"], name="runner")
pod_labels_tuple = (ROLE_LABEL, "test_target_pod")
target_pod = create_pod_manifest(
host=host,
additional_labels={
pod_labels_tuple[0]: pod_labels_tuple[1],
CLEANUP_LABEL: CLEANUP_ALWAYS,
},
generate_name=gen_name,
container=target_container,
)
target_ports = [
int(port.replace("-", ""))
for port in port_dict_per_host[host_string].values()
]
svc = create_service_manifest(
host,
{pod_labels_tuple[0]: pod_labels_tuple[1]},
{
ROLE_LABEL: "test_target_svc",
CLEANUP_LABEL: CLEANUP_ALWAYS
},
target_ports,
)
target_pod_namespace = host.namespace
resp = api.create_namespaced_pod(
namespace=target_pod_namespace, body=target_pod)
if isinstance(resp, k8s.client.V1Pod):
self.logger.debug("Target pod %s created succesfully",
resp.metadata.name)
self._current_pods.append(resp)
else:
self.logger.error("Failed to create pod! Resp: %s", resp)
resp = api.create_namespaced_service(namespace=host.namespace,
body=svc)
if isinstance(resp, k8s.client.V1Service):
service_names_per_host[host_string] = resp.spec.cluster_ip
self.logger.debug("Target svc %s created succesfully",
resp.metadata.name)
self._current_services.append(resp)
else:
self.logger.error("Failed to create target svc! Resp: %s",
resp)
else:
service_names_per_host[host_string] = services_for_host[
0].spec.cluster_ip
return service_names_per_host, port_dict_per_host
def _find_or_create_cluster_resources_for_cases(self, cases_dict,
api: k8s.client.CoreV1Api):
resolved_cases = {}
from_host_mappings = {}
to_host_mappings = {}
port_mappings = {}
for from_host_string, target_dict in cases_dict.items():
from_host = Host.from_identifier(from_host_string)
logger.debug("Searching pod for host " + str(from_host))
if not (isinstance(from_host, ClusterHost)
or isinstance(from_host, GenericClusterHost)):
raise ValueError(
"Only ClusterHost and GenericClusterHost fromHosts are supported by this Orchestrator"
)
namespaces_for_host = self._find_or_create_namespace_for_host(
from_host, api)
from_host = ClusterHost(namespaces_for_host[0].metadata.name,
from_host.pod_labels)
logger.debug("Updated fromHost with found namespace: " +
str(from_host))
pods_for_host = [
pod for pod in self._current_pods if from_host.matches(pod)
]
# create pod if none for fromHost is in cluster (and add it to podsForHost)
if not pods_for_host:
logger.debug("Creating dummy pod for host " + str(from_host))
additional_labels = {
ROLE_LABEL: "from_host_dummy",
CLEANUP_LABEL: CLEANUP_ALWAYS
}
container = k8s.client.V1Container(image="nginx:stable",
name="dummy")
dummy = init_pod(from_host, additional_labels,
PROJECT_PREFIX + "-dummy-", container)
resp = api.create_namespaced_pod(dummy.metadata.namespace,
dummy)
if isinstance(resp, k8s.client.V1Pod):
logger.debug("Dummy pod " + resp.metadata.name +
" created succesfully")
pods_for_host = [resp]
self._current_pods.append(resp)
else:
logger.error("Failed to create dummy pod! Resp: " +
str(resp))
else:
logger.debug("Pods matching " + str(from_host) +
" already exist: " + str(pods_for_host))
# resolve target names for fromHost and add them to resolved cases dict
pod_identifier = pods_for_host[
0].metadata.namespace + ":" + pods_for_host[0].metadata.name
logger.debug("Mapped pod_identifier: " + str(pod_identifier))
from_host_mappings[from_host_string] = pod_identifier
names_per_host, port_names_per_host = self._get_target_names_creating_them_if_missing(
target_dict, api)
to_host_mappings[from_host_string] = names_per_host
port_mappings[from_host_string] = port_names_per_host
resolved_cases[pod_identifier] = {
names_per_host[t]:
[port_names_per_host[t][p] for p in target_dict[t]]
for t in target_dict
}
return resolved_cases, from_host_mappings, to_host_mappings, port_mappings
def _get_target_names_creating_them_if_missing(self, target_dict,
api: k8s.client.CoreV1Api):
svc_names_per_host = {}
port_dict_per_host = {}
for host_string in target_dict.keys():
host = Host.from_identifier(host_string)
if isinstance(host, GenericClusterHost):
logger.debug(
"Found GenericClusterHost " + str(host) +
". Rewriting it to a ClusterHost in default namespace now."
)
host = ClusterHost("default", host.pod_labels)
if not isinstance(host, ClusterHost):
raise ValueError(
"Only ClusterHost targets are supported by this Orchestrator. Host: "
+ str(host) + ", hostString: " + host_string)
logger.debug("Searching service for host " + str(host))
services_for_host = [
svc for svc in self._current_services if host.matches(svc)
]
logger.debug("Found services {} for host {} ".format(
[svc.metadata for svc in services_for_host], host))
rewritten_ports = self._rewrite_ports_for_host(
target_dict[host_string], services_for_host)
logger.debug("Rewritten ports: " + str(rewritten_ports))
port_dict_per_host[host_string] = rewritten_ports
if not services_for_host:
gen_name = PROJECT_PREFIX + "-test-target-pod-"
target_container = k8s.client.V1Container(
image=self.target_image, name="runner")
pod_labels_tuple = (ROLE_LABEL, "test_target_pod")
target_pod = init_pod(host=host,
additional_labels={
pod_labels_tuple[0]:
pod_labels_tuple[1],
CLEANUP_LABEL: CLEANUP_ALWAYS
},
generate_name=gen_name,
container=target_container)
target_ports = [
int(port.replace("-", ""))
for port in port_dict_per_host[host_string].values()
]
# ToDo we should use the cluser ip instead of the DNS names
# so we don't need the lookups
svc_name = "svc-" + convert_to_resource_name(
host.to_identifier())
svc = init_svc(host,
{pod_labels_tuple[0]: pod_labels_tuple[1]}, {
ROLE_LABEL: "test_target_svc",
CLEANUP_LABEL: CLEANUP_ALWAYS
}, svc_name, target_ports)
target_pod_namespace = host.namespace
svc_names_per_host[
host_string] = target_pod_namespace + ":" + svc_name
resp = api.create_namespaced_pod(
namespace=target_pod_namespace, body=target_pod)
if isinstance(resp, k8s.client.V1Pod):
logger.debug("Target pod " + resp.metadata.name +
" created succesfully")
self._current_pods.append(resp)
else:
logger.error("Failed to create pod! Resp: " + str(resp))
resp = api.create_namespaced_service(namespace=host.namespace,
body=svc)
if isinstance(resp, k8s.client.V1Service):
logger.debug("Target svc " + resp.metadata.name +
" created succesfully")
self._current_services.append(resp)
else:
logger.error("Failed to create target svc! Resp: " +
str(resp))
else:
svc_names_per_host[host_string] = services_for_host[
0].metadata.namespace + ":" + services_for_host[
0].metadata.name
return svc_names_per_host, port_dict_per_host