Telemetry Streaming
Table of Contents
Telemetry Streaming
Telemetry streaming using the OpenConfig plugin.
The PAN-OS OpenConfig plugin supports telemetry streaming with the gNMI
Subscribe request. The Subscribe request support the following modes:
- Once.
-
Poll.
-
Stream.
The streaming mode supports 3 different subtypes.
-
On-Change
-
Target Defined
- Sample
The time difference in the examples displays how you can expect each of the subscription
types to react to your requests.
See the PAN-OS OpenConfig Bundling Support topic for more information about configurability with the subscribe
request.
Protobuf Formatted Subscribe Requests
The protobuf formatted request supported for Subscribe requests can be used by
specifying the encoding as PROTO and the format as
PROTOJSON.
The following request and output shows an example:
gnmic -u username -p password --tls-ca $CA-CERT --tls-cert $CIENT_CERT --tls-key $ CIENT_KEY sub --encoding proto --timeout 120s --path "/interfaces/interface[name=ethernet1/2]/state" --mode once --format protojson
The example response shows a protobuf specified response:
{ "update": { "timestamp": "1678474283000000000", "update": [ { "path": { "elem": [ { "name": "interfaces" }, { "name": "interface", "key": { "name": "ethernet1/2" } }, { "name": "state" }, { "name": "counters" }, { "name": "last-clear" } ] }, "val": { "uintVal": "0" } } ] } }
Once
Similar to a Get request, a Once subscription returns a
singular response. The request creates a single channel to submit and receive the
relevant updates then closes the RPC channel.
PAN-OS OpenConfig Model
Support shows which models currently support telemetry streaming.
gnmic -u username -p password --tls-ca $CA-CERT --tls-cert $CIENT_CERT --tls-key $ CIENT_KEY -a 10.1.1.1:9339 sub --path "/interfaces/interface[name=*]"/state/oper-status --mode once -e JSON_IETF
An example response shows a one-time snapshot of the interface using
the Once type of subscribe request:
{ "source": "10.1.1.1:9339", "subscription-name": "default", "time": "1969-12-31T16:00:01.614649807-08:00", "timestamp": 1614649807, "updates": [ { "Path": "interfaces/interface[name=ethernet1/1]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "UP" } }, { "Path": "interfaces/interface[name=ethernet1/2]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "DOWN" } }, { "Path": "interfaces/interface[name=ethernet1/3]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "DOWN" } } ] }
Poll
Poll methods create a long-lived RPC connection that can
subscribe to a number of paths. Once you send a poll message. The response returns
the data requested. While the connection is still alive, the client can send
periodic poll requests to retrieve relevant
data.
gnmic -u username -p password --tls-ca $CA-CERT --tls-cert $CIENT_CERT --tls-key $ CIENT_KEY -a 10.1.1.1:9339 sub --path "/interfaces/interface[name=*]"/state/oper-status --mode poll -e JSON_IETF
The response shows two responses in a non-standard interval time
setting based on when the empty poll message is sent.
{ "time": "1969-12-31T16:00:01.614648989-08:00", "timestamp": 1614648989, "updates": [ { "Path": "interfaces/interface[name=ethernet1/1]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "UP" } }, { "Path": "interfaces/interface[name=ethernet1/2]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "DOWN" } }, { "Path": "interfaces/interface[name=ethernet1/3]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "DOWN" } } ] }
Both of these responses above and below happen
using the same request. The response also includes a received sync response
'true' from '10.1.1.1:9339' to acknowledge the subscription is still
alive.
{ "time": "1969-12-31T16:00:01.614649617-08:00", "timestamp": 1614649617, "updates": [ { "Path": "interfaces/interface[name=ethernet1/3]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "DOWN" } }, { "Path": "interfaces/interface[name=ethernet1/1]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "DOWN" } }, { "Path": "interfaces/interface[name=ethernet1/2]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "DOWN" } } ] }
Stream
The streaming subtypes provide a continuous flow of
telemetry data based on the specified subtype. Review each of the sections for the
subtypes to familiarize yourself with the various streaming types.
Sample and Target Defined
The Sample method must include the
--sample-interval along with the interval in seconds.
Alternatively, you can use --target_defined. The lowest accepted
interval is 5 seconds.
gnmic -u username -p password --tls-ca $CA-CERT --tls-cert $CIENT_CERT --tls-key $ CIENT_KEY -a 10.1.1.1:9339 sub --path "/interfaces/interface[name=*]"/state/oper-status --mode stream --stream-mode sample --sample-interval 10s -e JSON_IETF
The responses:
{ "source": "10.1.1.1:9339", "subscription-name": "default", "time": "1969-12-31T16:00:01.6146501-08:00", "timestamp": 1614650100, "updates": [ { "Path": "interfaces/interface[name=ethernet1/1]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "DOWN" } } ] } { "source": "10.1.1.1:9339", "subscription-name": "default", "time": "1969-12-31T16:00:01.61465011-08:00", "timestamp": 1614650110, "updates": [ { "Path": "interfaces/interface[name=ethernet1/1]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "DOWN" } } ] } { "source": "10.1.1.1:9339", "subscription-name": "default", "time": "1969-12-31T16:00:01.61465012-08:00", "timestamp": 1614650120, "updates": [ { "Path": "interfaces/interface[name=ethernet1/1]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "UP" } } ] }
On Change
On change updates are only sent upon the update of data
for a specified
path.
gnmic -u username -p password --tls-ca $CA-CERT --tls-cert $CIENT_CERT --tls-key $ CIENT_KEY -a 10.1.1.1:9339 sub --path "/interfaces/interface[name=*]"/state/description --mode stream --stream-mode on_change -e JSON_IETF
The firewall responds when the oper-status changes to down:
{ "source": "10.1.1.1:9339", "subscription-name": "default", "timestamp": 1614650238, "time": "1969-12-31T16:00:01.614650238-08:00", "updates": [ { "Path": "interfaces/interface[name=ethernet1/1]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "UP" } } ] } { "source": "10.1.1.1:9339", "subscription-name": "default", "timestamp": 1614650294, "time": "1969-12-31T16:00:01.614650294-08:00", "updates": [ { "Path": "interfaces/interface[name=ethernet1/1]/state/oper-status", "values": { "interfaces/interface/state/oper-status": "DOWN" } } ] }
