Add extra services checks to kuberhealthy

[viniciusdc]

Reference Issues or PRs

closes #2976

What does this implement/fix?

• add extra checks for argo, dask-gateway and grafana,

Put a x in the boxes that apply

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds a feature)
• Breaking change (fix or feature that would cause existing features not to work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Other (please describe):

Testing

• Did you test the pull request locally?
• Did you add new tests?

How to test this PR?

Any other comments?

[marcelovilla]

@viniciusdc I haven't reviewed this PR but we probably want to update the Summary of available healthchecks in our docs.

[marcelovilla]

Looks good, thanks @viniciusdc 🚀

I'm wondering whether we should still have

nebari/src/_nebari/stages/kubernetes_services/__init__.py

Lines 744 to 775 in 8c9a680

	def check(
	self, stage_outputs: Dict[str, Dict[str, Any]], disable_prompt: bool = False
	):
	directory = "stages/07-kubernetes-services"
	import requests
	# suppress insecure warnings
	import urllib3
	urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
	def _attempt_connect_url(
	url, verify=False, num_attempts=NUM_ATTEMPTS, timeout=TIMEOUT
	):
	for i in range(num_attempts):
	response = requests.get(url, verify=verify, timeout=timeout)
	if response.status_code < 400:
	print(f"Attempt {i+1} health check succeeded for url={url}")
	return True
	else:
	print(f"Attempt {i+1} health check failed for url={url}")
	time.sleep(timeout)
	return False
	services = stage_outputs[directory]["service_urls"]["value"]
	for service_name, service in services.items():
	service_url = service["health_url"]
	if service_url and not _attempt_connect_url(service_url):
	print(
	f"ERROR: Service {service_name} DOWN when checking url={service_url}"
	)
	sys.exit(1)

now that healthchecks are implemented using Kuberhealthy.