def cmd_debug(pod_name):
"""
Enables you to debug a Pod by taking it offline through removing the `guard=pyk` label.
Usage: `debug pod`, for example, `debug webserver-42abc`.
"""
if not pod_name:
print("Sorry, I need a Pod name in order to do my work. Do a `kploy stats` first to glean the Pod name you want to debug, e.g. `webserver-42abc`.")
print("With the Pod name you can then run `kploy debug webserver-42abc` to take the Pod offline and subsequently for example use `kubectl exec` to enter the Pod.")
sys.exit(1)
here = os.path.realpath(".")
kployfile = os.path.join(here, DEPLOYMENT_DESCRIPTOR)
print("Trying to take Pod %s offline for debugging ..." %(pod_name))
try:
kploy, _ = util.load_yaml(filename=kployfile)
logging.debug(kploy)
pyk_client = kploycommon._connect(api_server=kploy["apiserver"], debug=DEBUG)
pod_path = "".join(["/api/v1/namespaces/", kploy["namespace"], "/pods/", pod_name])
pod = pyk_client.describe_resource(pod_path)
resource = pod.json()
resource["metadata"]["labels"] = {}
logging.debug("Removed guard label from Pod, now labeled with: %s" %(resource["metadata"]["labels"]))
pyk_client.execute_operation(method='PUT', ops_path=pod_path, payload=util.serialize_tojson(resource))
# now we just need to make sure that the newly created Pod is again owned by kploy:
rc_name = pod_name[0:pod_name.rfind("-")] # NOTE: this is a hack, it assumes a certain generator pattern; need to figure a better way to find a Pod's RC
logging.debug("Generating RC name from Pod: %s" %(rc_name))
rc_path = "".join(["/api/v1/namespaces/", kploy["namespace"], "/replicationcontrollers/", rc_name])
rc = pyk_client.describe_resource(rc_path)
kploycommon._own_pods_of_rc(pyk_client, rc, kploy["namespace"], rc_path, VERBOSE)
except (Exception) as e:
print("Something went wrong when taking the Pod offline:\n%s" %(e))
sys.exit(1)
print(80*"=")
print("\nOK, the Pod %s is offline. Now you can, for example, use `kubectl exec` now to debug it." %(pod_name))
def cmd_scale(scale_def):
"""
Enables you to scale an RC up or down by setting the number of replicas.
Usage: `scale rc=replica_count`, for example, `scale webserver-rc=10`.
"""
if not scale_def:
print(
"Sorry, I need a scale definition in order to do my work. Do a `kploy list` first to glean the RC name you want to scale, e.g. `webserver-rc`."
)
print(
"With the RC name you can then run `kploy scale webserver-rc=5` to scale the respective RC to 5 replicas."
)
sys.exit(1)
here = os.path.realpath(".")
kployfile = os.path.join(here, DEPLOYMENT_DESCRIPTOR)
try:
rc_name = scale_def.split("=")[0]
replica_count = int(scale_def.split("=")[1])
except (Exception) as e:
print("Can't parse scale definition `%s` due to: %s" % (scale_def, e))
print(
"The scale definition should look as follows: `rc=replica_count`, for example, `scale webserver-rc=10`."
)
sys.exit(1)
print("Trying to scale RC %s to %d replicas" % (rc_name, replica_count))
try:
kploy, _ = util.load_yaml(filename=kployfile)
logging.debug(kploy)
pyk_client = kploycommon._connect(api_server=kploy["apiserver"],
debug=DEBUG)
rc_path = "".join([
"/api/v1/namespaces/", kploy["namespace"],
"/replicationcontrollers/", rc_name
])
rc = pyk_client.describe_resource(rc_path)
resource = rc.json()
old_replica_count = resource["spec"]["replicas"]
if VERBOSE:
logging.info("Scaling RC from %d to %d replicas" %
(old_replica_count, replica_count))
logging.debug("RC about to be scaled: %s" % (resource))
resource["spec"]["replicas"] = replica_count
pyk_client.execute_operation(method='PUT',
ops_path=rc_path,
payload=util.serialize_tojson(resource))
# and make sure that the newly created Pods are owned by kploy (on scale up)
if replica_count > old_replica_count:
logging.debug("Scaling up, trying to own new Pods")
rc = pyk_client.describe_resource(rc_path)
kploycommon._own_pods_of_rc(pyk_client, rc, kploy["namespace"],
rc_path, VERBOSE)
except (Exception) as e:
print("Something went wrong when scaling RC:\n%s" % (e))
sys.exit(1)
print(80 * "=")
print(
"OK, I've scaled RC %s to %d replicas. You can do a `kploy stats` now to verify it."
% (rc_name, replica_count))
def cmd_debug(pod_name):
"""
Enables you to debug a Pod by taking it offline through removing the `guard=pyk` label.
Usage: `debug pod`, for example, `debug webserver-42abc`.
"""
if not pod_name:
print(
"Sorry, I need a Pod name in order to do my work. Do a `kploy stats` first to glean the Pod name you want to debug, e.g. `webserver-42abc`."
)
print(
"With the Pod name you can then run `kploy debug webserver-42abc` to take the Pod offline and subsequently for example use `kubectl exec` to enter the Pod."
)
sys.exit(1)
here = os.path.realpath(".")
kployfile = os.path.join(here, DEPLOYMENT_DESCRIPTOR)
print("Trying to take Pod %s offline for debugging ..." % (pod_name))
try:
kploy, _ = util.load_yaml(filename=kployfile)
logging.debug(kploy)
pyk_client = kploycommon._connect(api_server=kploy["apiserver"],
debug=DEBUG)
pod_path = "".join(
["/api/v1/namespaces/", kploy["namespace"], "/pods/", pod_name])
pod = pyk_client.describe_resource(pod_path)
resource = pod.json()
resource["metadata"]["labels"] = {}
logging.debug("Removed guard label from Pod, now labeled with: %s" %
(resource["metadata"]["labels"]))
pyk_client.execute_operation(method='PUT',
ops_path=pod_path,
payload=util.serialize_tojson(resource))
# now we just need to make sure that the newly created Pod is again owned by kploy:
rc_name = pod_name[0:pod_name.rfind(
"-"
)] # NOTE: this is a hack, it assumes a certain generator pattern; need to figure a better way to find a Pod's RC
logging.debug("Generating RC name from Pod: %s" % (rc_name))
rc_path = "".join([
"/api/v1/namespaces/", kploy["namespace"],
"/replicationcontrollers/", rc_name
])
rc = pyk_client.describe_resource(rc_path)
kploycommon._own_pods_of_rc(pyk_client, rc, kploy["namespace"],
rc_path, VERBOSE)
except (Exception) as e:
print("Something went wrong when taking the Pod offline:\n%s" % (e))
sys.exit(1)
print(80 * "=")
print(
"\nOK, the Pod %s is offline. Now you can, for example, use `kubectl exec` now to debug it."
% (pod_name))
def cmd_scale(scale_def):
"""
Enables you to scale an RC up or down by setting the number of replicas.
Usage: `scale rc=replica_count`, for example, `scale webserver-rc=10`.
"""
if not scale_def:
print("Sorry, I need a scale definition in order to do my work. Do a `kploy list` first to glean the RC name you want to scale, e.g. `webserver-rc`.")
print("With the RC name you can then run `kploy scale webserver-rc=5` to scale the respective RC to 5 replicas.")
sys.exit(1)
here = os.path.realpath(".")
kployfile = os.path.join(here, DEPLOYMENT_DESCRIPTOR)
try:
rc_name = scale_def.split("=")[0]
replica_count = int(scale_def.split("=")[1])
except (Exception) as e:
print("Can't parse scale definition `%s` due to: %s" %(scale_def, e))
print("The scale definition should look as follows: `rc=replica_count`, for example, `scale webserver-rc=10`.")
sys.exit(1)
print("Trying to scale RC %s to %d replicas" %(rc_name, replica_count))
try:
kploy, _ = util.load_yaml(filename=kployfile)
logging.debug(kploy)
pyk_client = kploycommon._connect(api_server=kploy["apiserver"], debug=DEBUG)
rc_path = "".join(["/api/v1/namespaces/", kploy["namespace"], "/replicationcontrollers/", rc_name])
rc = pyk_client.describe_resource(rc_path)
resource = rc.json()
old_replica_count = resource["spec"]["replicas"]
if VERBOSE: logging.info("Scaling RC from %d to %d replicas" %(old_replica_count, replica_count))
logging.debug("RC about to be scaled: %s" %(resource))
resource["spec"]["replicas"] = replica_count
pyk_client.execute_operation(method='PUT', ops_path=rc_path, payload=util.serialize_tojson(resource))
# and make sure that the newly created Pods are owned by kploy (on scale up)
if replica_count > old_replica_count:
logging.debug("Scaling up, trying to own new Pods")
rc = pyk_client.describe_resource(rc_path)
kploycommon._own_pods_of_rc(pyk_client, rc, kploy["namespace"], rc_path, VERBOSE)
except (Exception) as e:
print("Something went wrong when scaling RC:\n%s" %(e))
sys.exit(1)
print(80*"=")
print("OK, I've scaled RC %s to %d replicas. You can do a `kploy stats` now to verify it." %(rc_name, replica_count))
