does the action output stores in CDB ?

kiran kotari — Fri, 01 Mar 2019 12:08:59 GMT

In my action output, we string variable of name "message".

Where does this message stored in NSO and How to read it ?

Is it possible to push the action output to NCS CLI any examples please.

Re: does the action output stores in CDB ?

frjansso — Mon, 23 Apr 2018 19:58:50 GMT

No, the output from an action is not stored in CDB.

Code (java or python) can invoke an action and use the result though.

Re: does the action output stores in CDB ?

gschudel — Tue, 24 Apr 2018 19:16:50 GMT

There are several pretty complete examples in the nso_development-guide -- e.g. Ex. 90 through 94 for Python

where you see the "output.xxxx"... this gets displayed at CLI...

As a more complete example, if you build an action with YANG like this

module tryActionexample {

(skip)

container action {

tailf:info "Action-example... check sync";

tailf:action tryActionexample {

tailf:actionpoint tryActionexample-action;

input {

leaf target-device {

tailf:info "Device to extract config from...";

mandatory true;

type leafref {

path "/ncs:devices/ncs:device/ncs:name";

}

} // input....

output {

leaf result1 {

type string;

}

} // container action

} // module tryActionexample

and then Python like this:

class tryActionexampleAction(Action):

"""This class implements the an action test - just check-sync."""

@Action.action

def cb_action(self, uinfo, name, kp, input, output):

self.log.info('action name: ', name)

# self.log.info('action input.tickid: ', input.tickid)

#... READ INPUTS...

targetDev = input.target_device # (leafref) ::

#...........................................................................

# fetch the "check-sync" status for the device...

# results will be : "out-of-sync" "in-sync" or "unknown"

trgcheck = devCheckSync (targetDev, self)

result1 = '\n------------------------------------'

result1 += '\n Target Device: %s [%s]' % (targetDev, trgcheck)

result1 += '\n------------------------------------'

output.result1 = result1

#-------------------------------------------------------

# ------------------------------------------------------

def devCheckSync (deviceName, self):

with ncs.maapi.Maapi() as m:

with ncs.maapi.Session(m, 'admin', 'system'):

root = ncs.maagic.get_root(m)

device = root.devices.device[deviceName]

inorout = device.check_sync()

return inorout.result

#-------------------------------------------------------

# ---------------------------------------------

# COMPONENT THREAD THAT WILL BE STARTED BY NCS.

# ---------------------------------------------

class Main(ncs.application.Application):

def setup(self):

self.log.info('Main RUNNING')

self.register_action('tryActionexample-action', tryActionexampleAction)

def teardown(self):

self.log.info('Main FINISHED')

you'll get an NSO CLI output like this:

admin@ncs% request action tryActionexample target-device c1

result1

------------------------------------

Target Device: c1 [in-sync]

------------------------------------

[ok][2018-04-24 10:53:31]

[edit]

admin@ncs%

Of course, you have access (internally to python) to "output" (the YANG leaf)... and can add additional leaf's under "output"

It's just a simple example (action is "check-sync") but it illustrates the approach.

cheers

gregg

Re: does the action output stores in CDB ?

kiran kotari — Wed, 25 Apr 2018 07:15:29 GMT

Thanks Gregg.

If the action output leafs are not stored in CDB, then are these values are not persistent ?

Re: does the action output stores in CDB ?

gschudel — Wed, 25 Apr 2018 14:16:17 GMT

Hi Kiran

that's correct - not stored in CDB, not peristent

(i'm not sure how or why one would ever want these to be persistent. this is typically asking a question "what is the state _right now_) --

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