Manager App v2/v3 shows PCF title services

[johnalejandro001]

Hi I couldn't find documentation on how to retrieves services attached to an specific app.

1. Another thing how do you set a specific org, space in the code?
2. Is there limitation on the apps in context of pagination - what is the limit?

[antechrestos]

Which services are you referring to? Service bindings, instances or services?

About the pagination limit, I have not tested it with great number of page but I assume this should work.

About fixing the space and org, do you mean like the cf cli? If so there is not. This is a library meant to interract with the CF API. However, you can do things like (given you want to load all applications of a org/space )

for app in client.v2.apps.list(space_guid='space-id', organization_guid='org-id'):
    pass

Entities returned by client wrap all the urls returned as a method

Exemple of an application:

{
      "metadata": {
        "guid": "6064d98a-95e6-400b-bc03-be65e6d59622",
        "url": "/v2/apps/6064d98a-95e6-400b-bc03-be65e6d59622",
        "created_at": "2016-06-08T16:41:45Z",
        "updated_at": "2016-06-08T16:41:45Z"
      },
      "entity": {
        "name": "name-2443",
        /* ... */
        "space_url": "/v2/spaces/9c5c8a91-a728-4608-9f5e-6c8026c3a2ac",
        "stack_url": "/v2/stacks/f6c960cc-98ba-4fd1-b197-ecbf39108aa2",
        "routes_url": "/v2/apps/6064d98a-95e6-400b-bc03-be65e6d59622/routes",
        "events_url": "/v2/apps/6064d98a-95e6-400b-bc03-be65e6d59622/events",
        "service_bindings_url": "/v2/apps/6064d98a-95e6-400b-bc03-be65e6d59622/service_bindings",
        "route_mappings_url": "/v2/apps/6064d98a-95e6-400b-bc03-be65e6d59622/route_mappings"
      }
    }

will result to an object having extra methods such as

• space() -> load the space of the application
• stack() -> load the stack
• service_bindings() -> here there is a s suffix and it will return a generator of service binding. You can use it with for service_binding in app.service_bindings():...

If you take a look at the application class, you will see that it has extra methods (start, stop and so on)

So, you can for a given application do

app = client.v2.apps['app-guid' ] # similar to client.v2.apps.get('app-guid')
app_service_bindings = [ s for s in app.service_bindings() ]
# or if you don't care about the application object
app_service_bindings = [ s for s in client.v2.apps.list_service_bindings('app-guid') ]
# then you can resolve service instances
app_service_instances = [ s.service_instance() for s in app_service_bindings ]
# then from service instance  you load service plans
app_service_plans = [ s.service_plan() for s in app_service_instances ]
# and then the service
app_services = [ s.service() for s in app_service_plans ]

Take a look at the v2 documentation or the v3 documentation.

If you see an entry that does not exist I will gladly implement it.

I hope you found answers

[johnalejandro001]

Thank you very much for helping me out with this. Definitely it helps me to get more clarity. You guys have done a pretty awesome job. Here is the actual code snippet that I'm slowly working on with all the data available. So the far the objects are to retrieve app-name, db-host and export them to csv.

import os
import logging
import threading
from cloudfoundry_client.client import CloudFoundryClient
import arrow
_logger = logging.getLogger(name)
logging.basicConfig(level=logging.INFO,
format='%(levelname)5s - %(name)s - %(message)s')
target_endpoint = 'https://api.paas.cool'
proxy = dict(http=os.environ.get('HTTP_PROXY', ''), https=os.environ.get('HTTPS_PROXY', ''))
client = CloudFoundryClient(target_endpoint, proxy=proxy, verify=True)

init with user credentials

client.init_with_user_credentials('username', 'password')

init with refresh token (that will retrieve a fresh access token)

print("Displaying all available Organization guid available")
for organization in client.v2.organizations:
print(organization['metadata']['guid']['entity']['name'])

Setting scope to an specific org/space

print ("Setting Up space")
target_space = 'our_uat_space'
target_org = 'our_uat_org'
target_space_apps = client.v2.apps.list (space_guid=target_space,organization_guid=target_org)

Iterating over the list of apps available per space/org

for app in target_space_apps:
pass
app_guid = (app['metadata']['guid'])
app_name = (app['entity']['name'])
app_service_bindings = [s for s in client.v2.apps.list_service_bindings (app_guid)]
print(app_name)
try:
if len(app_service_bindings) > 1:
print(app_service_bindings[0]['entity'])
filename = f"services_export.csv"
with open (filename, 'w', newline='') as csvFile:
writer = csv.writer(csvFile, dialect='excel', delimiter=',')
headers = [
'app-name',
'db-name',
'dc'
]
writer.writerow (headers)
service = [
row["app_name"],
row["app_service_bindings"]
]
writer.writerow(service)
except IndexError:
pass
continue

[johnalejandro001]

I'm very new to Python as you might note. So any constructive critics will be taken pretty positive.