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 value of that VS' 'Availability' state (offline, available, unknown, etc)? I can do the following: my_virtual = mgmt.tm.ltm.virtuals.virtual.load(name='some_virtual') stats = my_virtual.stats.load() Printing the stats.raw shows that there is a nested dictionary entry keyed 'status.availibityState' that appears to hold the value I'm looking for. Forgive my inexperience, but what is the easiest way to get the availability state of a virtual using the SDK? Perhaps a method I'm missing that retrieves the value above, or the value is easily obtained elsewhere. Appreciate any assitance!

Code was tested on BigIP 11.5.4. Will update answer for 12.1.1 in 15 min.

F5 Python SDK: How to get virtual server availability?

27 Replies

Hannes_Rapp

Nimbostratus

Jan 19, 2017

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)))

Ed_Summers

Nimbostratus

Jan 19, 2017

Thank you for your help and patience! Much appreciated...

Not sure if there is a difference in the data structures between our versions: F5 SDK v2.0.2 BIGIP 12.1.1 Python 3.3.2

When I run the stats.entries.get method you outlined above, I get a return of 'None'. However there is a value for status.availibilityState buried in nested dicts for stats.entries.

Here's a test I ran in interactive shell (I have a module that obtains a token and base object of 'mgmt'):

>>> virtuals = mgmt.tm.ltm.virtuals.virtual.load(name='my_virtual_name')
>>> stats = virtuals.stats.load()
>>> state = stats.entries.get('status.availabilityState')['description']
Traceback (most recent call last):
  File "", line 1, in 
TypeError: 'NoneType' object is not subscriptable
>>> stats.entries
{'https://localhost/mgmt/tm/ltm/virtual/my_virtual_name/~Common~my_virtual_name/stats': {'nestedStats': {'selfLink': 'https://localhost/mgmt/tm/ltm/virtual/my_virtual_name/~Common~my_virtual_name/stats?ver=12.1.1', 'kind': 'tm:ltm:virtual:virtualstats', 'entries': {'totRequests': {'value': 0}, 'status.statusReason': {'description': 'The virtual server is available'}, 'csMinConnDur': {'value': 0}, 'fiveMinAvgUsageRatio': {'value': 0}, 'syncookie.syncookies': {'value': 0}, 'csMeanConnDur': {'value': 0}, 'tmName': {'description': '/Common/my_virtual_name'}, 'clientside.slowKilled': {'value': 0}, 'syncookie.hwSyncookies': {'value': 0}, 'ephemeral.bitsOut': {'value': 0}, 'syncookie.rejects': {'value': 0}, 'ephemeral.curConns': {'value': 0}, 'clientside.pktsOut': {'value': 0}, 'syncookie.syncacheCurr': {'value': 0}, 'clientside.bitsIn': {'value': 0}, 'ephemeral.pktsOut': {'value': 0}, 'destination': {'description': '192.168.1.1:443'}, 'syncookieStatus': {'description': 'not-activated'}, 'syncookie.hwsyncookieInstance': {'value': 0}, 'syncookie.swsyncookieInstance': {'value': 0}, 'clientside.evictedConns': {'value': 0}, 'clientside.curConns': {'value': 0}, 'clientside.totConns': {'value': 0}, 'clientside.bitsOut': {'value': 0}, 'oneMinAvgUsageRatio': {'value': 0}, 'ephemeral.totConns': {'value': 0}, 'syncookie.accepts': {'value': 0}, 'status.availabilityState': {'description': 'available'}, 'syncookie.syncacheOver': {'value': 0}, 'syncookie.hwAccepts': {'value': 0}, 'ephemeral.bitsIn': {'value': 0}, 'status.enabledState': {'description': 'enabled'}, 'ephemeral.evictedConns': {'value': 0}, 'fiveSecAvgUsageRatio': {'value': 0}, 'clientside.maxConns': {'value': 0}, 'csMaxConnDur': {'value': 0}, 'ephemeral.pktsIn': {'value': 0}, 'ephemeral.slowKilled': {'value': 0}, 'clientside.pktsIn': {'value': 0}, 'ephemeral.maxConns': {'value': 0}, 'cmpEnabled': {'description': 'enabled'}, 'cmpEnableMode': {'description': 'all-cpus'}}}}}

I'm not sure if your version is the same, but it appears the stats are nested three levels deep, first key being a link, second 'nestedStats', then 'entries'. If I follow the entire path I do get the value:

>>> print(stats.entries.get('https://localhost/mgmt/tm/ltm/virtual/my_virtual_name/~Common~my_virtual_name/stats')['nestedStats']['entries']['status.availabilityState']['description'])
    available

Am I running something incorrectly or are the returned structures different between our versions? I can run through the nest like you mentioned and get the value, though the first key (formatted as a URL) throws me off as I'm not sure if there is an elegant way to reference it. I could get it by listing the keys for that level of dict but that seems kludge-y.

Hannes_Rapp
Nimbostratus
Jan 19, 2017
Code was tested on BigIP 11.5.4. Will update answer for 12.1.1 in 15 min.
Hannes_Rapp
Nimbostratus
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.

Hannes_Rapp_162

Nacreous

Jan 19, 2017

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)))

Ed_Summers

Nimbostratus

Jan 19, 2017

Thank you for your help and patience! Much appreciated...

Not sure if there is a difference in the data structures between our versions: F5 SDK v2.0.2 BIGIP 12.1.1 Python 3.3.2

When I run the stats.entries.get method you outlined above, I get a return of 'None'. However there is a value for status.availibilityState buried in nested dicts for stats.entries.

Here's a test I ran in interactive shell (I have a module that obtains a token and base object of 'mgmt'):

>>> virtuals = mgmt.tm.ltm.virtuals.virtual.load(name='my_virtual_name')
>>> stats = virtuals.stats.load()
>>> state = stats.entries.get('status.availabilityState')['description']
Traceback (most recent call last):
  File "", line 1, in 
TypeError: 'NoneType' object is not subscriptable
>>> stats.entries
{'https://localhost/mgmt/tm/ltm/virtual/my_virtual_name/~Common~my_virtual_name/stats': {'nestedStats': {'selfLink': 'https://localhost/mgmt/tm/ltm/virtual/my_virtual_name/~Common~my_virtual_name/stats?ver=12.1.1', 'kind': 'tm:ltm:virtual:virtualstats', 'entries': {'totRequests': {'value': 0}, 'status.statusReason': {'description': 'The virtual server is available'}, 'csMinConnDur': {'value': 0}, 'fiveMinAvgUsageRatio': {'value': 0}, 'syncookie.syncookies': {'value': 0}, 'csMeanConnDur': {'value': 0}, 'tmName': {'description': '/Common/my_virtual_name'}, 'clientside.slowKilled': {'value': 0}, 'syncookie.hwSyncookies': {'value': 0}, 'ephemeral.bitsOut': {'value': 0}, 'syncookie.rejects': {'value': 0}, 'ephemeral.curConns': {'value': 0}, 'clientside.pktsOut': {'value': 0}, 'syncookie.syncacheCurr': {'value': 0}, 'clientside.bitsIn': {'value': 0}, 'ephemeral.pktsOut': {'value': 0}, 'destination': {'description': '192.168.1.1:443'}, 'syncookieStatus': {'description': 'not-activated'}, 'syncookie.hwsyncookieInstance': {'value': 0}, 'syncookie.swsyncookieInstance': {'value': 0}, 'clientside.evictedConns': {'value': 0}, 'clientside.curConns': {'value': 0}, 'clientside.totConns': {'value': 0}, 'clientside.bitsOut': {'value': 0}, 'oneMinAvgUsageRatio': {'value': 0}, 'ephemeral.totConns': {'value': 0}, 'syncookie.accepts': {'value': 0}, 'status.availabilityState': {'description': 'available'}, 'syncookie.syncacheOver': {'value': 0}, 'syncookie.hwAccepts': {'value': 0}, 'ephemeral.bitsIn': {'value': 0}, 'status.enabledState': {'description': 'enabled'}, 'ephemeral.evictedConns': {'value': 0}, 'fiveSecAvgUsageRatio': {'value': 0}, 'clientside.maxConns': {'value': 0}, 'csMaxConnDur': {'value': 0}, 'ephemeral.pktsIn': {'value': 0}, 'ephemeral.slowKilled': {'value': 0}, 'clientside.pktsIn': {'value': 0}, 'ephemeral.maxConns': {'value': 0}, 'cmpEnabled': {'description': 'enabled'}, 'cmpEnableMode': {'description': 'all-cpus'}}}}}

>>> print(stats.entries.get('https://localhost/mgmt/tm/ltm/virtual/my_virtual_name/~Common~my_virtual_name/stats')['nestedStats']['entries']['status.availabilityState']['description'])
    available

Hannes_Rapp_162
Nacreous
Jan 19, 2017
Code was tested on BigIP 11.5.4. Will update answer for 12.1.1 in 15 min.
Hannes_Rapp_162
Nacreous
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.

JRahm

Admin

Jan 20, 2017

We'll need to clean up stats for sure, the nested stuff is not easy access. For all keys/values, you can get at them a little cleaner (note that if you supply partition as an argument, the self link with be /~Common~vip/~Common~vip/stats):

name = ‘testvip’
selflink = 'https://localhost/mgmt/tm/ltm/virtual/{0}/~Common~{0}/stats'.format(name)
vip = b.tm.ltm.virtuals.virtual.load(name=name)
vipstats = vip.stats.load()
d = vipstats.entries.get(selflink).get('nestedStats').get('entries')
for i in d:
  print '{0}: {1}'.format(i, d[i].get('value'))

for your specific key, given you have set the selflink above, you can get that with:

vipstats.entries.get(selflink).
                 get('nestedStats').
                 get('entries').
                 get('status.availabilityState').
                 get('description')

Wojciech_Wypior
Nimbostratus
Jan 20, 2017
This will be addressed soon, watch this issue:

https://github.com/F5Networks/f5-common-python/issues/628
- Ed_Summers
  Nimbostratus
  Jan 20, 2017
  Thank you!
- Ed_Summers
  Nimbostratus
  Jan 30, 2017
  I wanted to follow-up to thank you for the amazingly fast attention to this. I checked out the development branch of the SDK and was able to pound out a quick script that takes advantage of the new stats handler. Appears to be working at least in the small test case I did testing connections and availability. Thanks kindly!
- rathid
  Nimbostratus
  Aug 04, 2017
  @ed summers can you paste the connection and availability code for virtual here and i am looking similar things for individual members as well
DMA_95966
Nimbostratus
Apr 16, 2018
Hi, I am still facing issue for ver 11.6.0. I am trying to get virtual server availability status .

Appreciate any assistance .

Rob_74473

Cirrus

Apr 25, 2018

I'm also struggling with this:

partition  = 'C25'
pool_name = 'temp_test'
 {u'https://localhost/mgmt/tm/ltm/pool/~C25~temp_test/~C25~temp_test/stats': {u'nestedStats': {u'entries': {u'activeMemberCnt': {u'value': 1},
pool  = mgmt.tm.ltm.pools.pool.load(name=pool_name, partition=partition)
stats = pool.stats.load()
print("{}".format(pformat(stats.entries)))

selflink = "https://{0}/mgmt/tm/ltm/pool/~{1}~{2}/~{1}~{2}/stats".format(bigip,partition,pool_name)

slink   = stats.entries.get(selflink)
nested  = slink.get('nestedStats')
entries = nested.get('entries')

activeMemberCnt = entries.get('activeMemberCnt').get('value')

Output:

Traceback (most recent call last):
  File "test_f5.py", line 46, in 
    nested  = slink.get('nestedStats')
AttributeError: 'NoneType' object has no attribute 'get'

So, using the example above, I am not able to get the selflink, but I have created the selflink string from what's given in the raw output. I'm working against: BIG-IP 12.1.3 Build 0.0.378 Final

Rob_74473

Cirrus

Apr 25, 2018

Directly testing the code above:

name = 'DHCP_RELAY_255.255.255.255_VIP'
selflink = 'https://{0}/mgmt/tm/ltm/virtual/{1}/~Common~{1}/stats'.format(bigip,name)
vip = mgmt.tm.ltm.virtuals.virtual.load(name=name)
vipstats = vip.stats.load()
d = vipstats.entries.get(selflink).get('nestedStats').get('entries')
for i in d:
  print("{0}: {1}".format(i, d[i].get('value')))

I get the same error:

Traceback (most recent call last):
  File "test_f5.py", line 39, in 
    d = vipstats.entries.get(selflink).get('nestedStats').get('entries')
AttributeError: 'NoneType' object has no attribute 'get'

Rob_74473
Cirrus
Apr 25, 2018
See answer below...

Rob_74473

Cirrus

Apr 25, 2018

This is brutal to work with!

partition  = 'C25'
pool_name = 'temp_test'
pool  = mgmt.tm.ltm.pools.pool.load(name=pool_name, partition=partition)
stats = pool.stats.load()
for item in stats.entries:
        params = stats.entries.get(item).get('nestedStats').get('entries')

stuff = ['activeMemberCnt','curSessions','serverside.curConns','serverside.maxConns','serverside.totConns','status.enabledState','status.availabilityState']

for item in stuff:
        for key in ('value','description'):
                if key in params[item]:
                        print("'{}': {}".format(item,params[item][key]))

OUTPUT:
'activeMemberCnt': 1
'curSessions': 0
'serverside.curConns': 0
'serverside.maxConns': 0
'serverside.totConns': 0
'status.enabledState': enabled
'status.availabilityState': available

DMA_95966
Nimbostratus
Apr 30, 2018
Thanks a lot Rob , let me test it as well ..will update you on this..

JRahm

Admin

Apr 30, 2018

Have you tried the Stats module?

>>> from f5.utils.responses.handlers import Stats
>>> p = b.tm.ltm.pools.pool.load(name='testpool')
>>> ps = Stats(p.stats.load())
>>> ps.stat.curSessions['value']
0
>>> ps.stat.status_availabilityState['description']
u'offline'
>>> ps.stat.status_enabledState['description']
u'enabled'

DMA_95966
Nimbostratus
May 01, 2018
Hi Jason ,

I am going to test this and update the thread shortly .

from f5.bigip import ManagementRoot\n\ndef get_vs_state(vs_name):\n virtual_s = API_ROOT.tm.ltm.virtuals.virtual.load(name=vs_name)\n stats = virtual_s.stats.load()\n state = stats.entries.get('status.availabilityState')['description']\n return state\n\nAPI_ROOT = ManagementRoot(\"bip-01\", \"admin\", \"admin\")\nVIRTUALS = API_ROOT.tm.ltm.virtuals.get_collection()\n\n EXAMPLE OF USE:\n Print AvailabilityState of all Virtual Servers\nfor virtual in VIRTUALS:\n print(\"Name: '%s' AvailabilityState: '%s'\" % (virtual.name, get_vs_state(virtual.name)))\n

>>> virtuals = mgmt.tm.ltm.virtuals.virtual.load(name='my_virtual_name')\n>>> stats = virtuals.stats.load()\n>>> state = stats.entries.get('status.availabilityState')['description']\nTraceback (most recent call last):\n File \"\", line 1, in \nTypeError: 'NoneType' object is not subscriptable\n>>> stats.entries\n{'https://localhost/mgmt/tm/ltm/virtual/my_virtual_name/~Common~my_virtual_name/stats': {'nestedStats': {'selfLink': 'https://localhost/mgmt/tm/ltm/virtual/my_virtual_name/~Common~my_virtual_name/stats?ver=12.1.1', 'kind': 'tm:ltm:virtual:virtualstats', 'entries': {'totRequests': {'value': 0}, 'status.statusReason': {'description': 'The virtual server is available'}, 'csMinConnDur': {'value': 0}, 'fiveMinAvgUsageRatio': {'value': 0}, 'syncookie.syncookies': {'value': 0}, 'csMeanConnDur': {'value': 0}, 'tmName': {'description': '/Common/my_virtual_name'}, 'clientside.slowKilled': {'value': 0}, 'syncookie.hwSyncookies': {'value': 0}, 'ephemeral.bitsOut': {'value': 0}, 'syncookie.rejects': {'value': 0}, 'ephemeral.curConns': {'value': 0}, 'clientside.pktsOut': {'value': 0}, 'syncookie.syncacheCurr': {'value': 0}, 'clientside.bitsIn': {'value': 0}, 'ephemeral.pktsOut': {'value': 0}, 'destination': {'description': '192.168.1.1:443'}, 'syncookieStatus': {'description': 'not-activated'}, 'syncookie.hwsyncookieInstance': {'value': 0}, 'syncookie.swsyncookieInstance': {'value': 0}, 'clientside.evictedConns': {'value': 0}, 'clientside.curConns': {'value': 0}, 'clientside.totConns': {'value': 0}, 'clientside.bitsOut': {'value': 0}, 'oneMinAvgUsageRatio': {'value': 0}, 'ephemeral.totConns': {'value': 0}, 'syncookie.accepts': {'value': 0}, 'status.availabilityState': {'description': 'available'}, 'syncookie.syncacheOver': {'value': 0}, 'syncookie.hwAccepts': {'value': 0}, 'ephemeral.bitsIn': {'value': 0}, 'status.enabledState': {'description': 'enabled'}, 'ephemeral.evictedConns': {'value': 0}, 'fiveSecAvgUsageRatio': {'value': 0}, 'clientside.maxConns': {'value': 0}, 'csMaxConnDur': {'value': 0}, 'ephemeral.pktsIn': {'value': 0}, 'ephemeral.slowKilled': {'value': 0}, 'clientside.pktsIn': {'value': 0}, 'ephemeral.maxConns': {'value': 0}, 'cmpEnabled': {'description': 'enabled'}, 'cmpEnableMode': {'description': 'all-cpus'}}}}}\n

>>> print(stats.entries.get('https://localhost/mgmt/tm/ltm/virtual/my_virtual_name/~Common~my_virtual_name/stats')['nestedStats']['entries']['status.availabilityState']['description'])\n available\n

name = ‘testvip’\nselflink = 'https://localhost/mgmt/tm/ltm/virtual/{0}/~Common~{0}/stats'.format(name)\nvip = b.tm.ltm.virtuals.virtual.load(name=name)\nvipstats = vip.stats.load()\nd = vipstats.entries.get(selflink).get('nestedStats').get('entries')\nfor i in d:\n print '{0}: {1}'.format(i, d[i].get('value'))\n

partition = 'C25'\npool_name = 'temp_test'\n {u'https://localhost/mgmt/tm/ltm/pool/~C25~temp_test/~C25~temp_test/stats': {u'nestedStats': {u'entries': {u'activeMemberCnt': {u'value': 1},\npool = mgmt.tm.ltm.pools.pool.load(name=pool_name, partition=partition)\nstats = pool.stats.load()\nprint(\"{}\".format(pformat(stats.entries)))\n\nselflink = \"https://{0}/mgmt/tm/ltm/pool/~{1}~{2}/~{1}~{2}/stats\".format(bigip,partition,pool_name)\n\nslink = stats.entries.get(selflink)\nnested = slink.get('nestedStats')\nentries = nested.get('entries')\n\nactiveMemberCnt = entries.get('activeMemberCnt').get('value')\n

name = 'DHCP_RELAY_255.255.255.255_VIP'\nselflink = 'https://{0}/mgmt/tm/ltm/virtual/{1}/~Common~{1}/stats'.format(bigip,name)\nvip = mgmt.tm.ltm.virtuals.virtual.load(name=name)\nvipstats = vip.stats.load()\nd = vipstats.entries.get(selflink).get('nestedStats').get('entries')\nfor i in d:\n print(\"{0}: {1}\".format(i, d[i].get('value')))

Traceback (most recent call last):\n File \"test_f5.py\", line 39, in \n d = vipstats.entries.get(selflink).get('nestedStats').get('entries')\nAttributeError: 'NoneType' object has no attribute 'get'

partition = 'C25'\npool_name = 'temp_test'\npool = mgmt.tm.ltm.pools.pool.load(name=pool_name, partition=partition)\nstats = pool.stats.load()\nfor item in stats.entries:\n params = stats.entries.get(item).get('nestedStats').get('entries')\n\nstuff = ['activeMemberCnt','curSessions','serverside.curConns','serverside.maxConns','serverside.totConns','status.enabledState','status.availabilityState']\n\nfor item in stuff:\n for key in ('value','description'):\n if key in params[item]:\n print(\"'{}': {}\".format(item,params[item][key]))\n\nOUTPUT:\n'activeMemberCnt': 1\n'curSessions': 0\n'serverside.curConns': 0\n'serverside.maxConns': 0\n'serverside.totConns': 0\n'status.enabledState': enabled\n'status.availabilityState': available\n

>>> from f5.utils.responses.handlers import Stats\n>>> p = b.tm.ltm.pools.pool.load(name='testpool')\n>>> ps = Stats(p.stats.load())\n>>> ps.stat.curSessions['value']\n0\n>>> ps.stat.status_availabilityState['description']\nu'offline'\n>>> ps.stat.status_enabledState['description']\nu'enabled'\n

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