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Ed_Summers's avatar
Ed_Summers
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Jan 19, 2017

F5 Python SDK: How to get virtual server availability?

Due to my limited Python and SDK experience I am finding it difficult to easily obtain the availability state of a virtual server. Given a 'virtual' object, what is the best/easiest way to return the...
devops
iControlREST
LTM
python
sdk
stats
Hannes_Rapp's avatar
Hannes_Rapp
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Great to see more people opting to use the SDK!

You can work with the output normally, as with any dict-type, using 

dict.get('something')
. Add in a set of square-brackets, if the extracted value is yet another key-value pair, and if you're looking for a very specific match: 
dict.get('something')['something']
.

Note: In the for-loop, I'm using 

virtual.name
- this extraction works without use of 
.get('name')
because 'name' is a 1st-level extraction - no nesting is involved. For the same reason, I can do 
state = stats.entries...
in my function, instead of 
state = stats.get('entries')...

f5-sdk v2.2.0 ; py3.4.3 ; 11.5.4

from f5.bigip import ManagementRoot

def get_vs_state(vs_name):
    virtual_s = API_ROOT.tm.ltm.virtuals.virtual.load(name=vs_name)
    stats = virtual_s.stats.load()
    state = stats.entries.get('status.availabilityState')['description']
    return state

API_ROOT = ManagementRoot("bip-01", "admin", "admin")
VIRTUALS = API_ROOT.tm.ltm.virtuals.get_collection()

 EXAMPLE OF USE:
 Print AvailabilityState of all Virtual Servers
for virtual in VIRTUALS:
    print("Name: '%s' AvailabilityState: '%s'" % (virtual.name, get_vs_state(virtual.name)))
Hannes_Rapp's avatar
Hannes_Rapp
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Jan 19, 2017

You're right. The response structure of virtual stats is different in 12.1.1, and it's absolutely dreadful. Best I could offer now is a hack so that this insignificant part at the beginning would be cut out 

{'https://localhost/mgmt/tm/ltm/virtual/my_virtual_name/~Common~my_virtual_name/stats': {'nestedStats': {
, then everything will work exactly the same as in my 11.5.4 sample, but it's kind of a dirty approach.

Will look further into cleaner solutions tomorrow.