Hey Gavin, Mine is a WIP, but I did a similar thing to replace v2 communities on IOS devices. Same problem there with needing to be specific.
Rather than doing anything with JSON, I directed stdout into a file, then used a python script to massage the results back into a jinja template. You may be able to tweak the regex used in the .py file and the playbook/modules a little to get what you need for trap receivers. I'm fairly new to Ansible, so I tried to make this as straightforward as possible. It's probably considered a dirty approach to folks more experienced, so I hope my code/method doesn't offend anyone. :) Link: https://github.com/vPacketNinja/snmp-replace Hopefully that is helpful for you. Ryan On Wednesday, July 19, 2017 at 9:32:05 AM UTC-4, Gavin McKee wrote: > > Hi Ganesh, > > I think the first thing I'm trying to do is build a json object with the > IP addresses of the currently configured trap receivers. So the first task > is as follows: > > vars: > *trapdests: [] # I want to populate this list with currently > configured trap receivers * > ios_provider: > username: "{{ user }}" > password: "{{ password }}" > host: "{{ inventory_hostname }}" > > tasks: > - name: get current snmp hosts > *register: command_output* > ios_command: > commands: "show snmp host" > provider: "{{ ios_provider }}" > > * - debug: msg="{{command_output.stdout_lines}}" <Print the > command output to the terminal for debugging>* > > > > The next task is to extract the trap receivers from the command output > (here is a sample of the command out - from the debug statement above) > > ok: [lab-xxx-xx-xxxxx] => { > "msg": [ > [ > > "-------------------------------------------------------------------", > "Host Port Version Level Type > SecName ", > > "-------------------------------------------------------------------", > "10.50.74.38 162 v2c noauth trap > mypub ", > > "-------------------------------------------------------------------", > "10.50.32.23 162 v2c noauth trap > mypub ", > "Use VRF: management", > > "-------------------------------------------------------------------", > "10.50.74.50 162 v2c noauth trap > mypub ", > "Use VRF: management", > > "-------------------------------------------------------------------", > "10.50.74.49 162 v2c noauth trap > mypub ", > "Use VRF: management", > > "-------------------------------------------------------------------", > "10.30.130.131 162 v2c noauth trap > mypub ", > "Use VRF: management", > > "-------------------------------------------------------------------", > "10.15.24.118 162 v2c noauth trap > mypub ", > "Use VRF: management", > > "-------------------------------------------------------------------", > "1.1.1.1 162 v2c noauth trap > TESTING ", > > "-------------------------------------------------------------------" > ] > ] > } > > > So what I'm trying to learn is how to use a regular expression to extract > each IP address from this output , update the *trapdests* list with these > addresses, and then use them to do a > *no snmp-server <host> traps version 2c mypub* > *no snmp-server <host> use-vrf management * > > > I hope that makes sense. > > Just as a note - a similar approach is take here > https://www.netnea.com/cms/2016/10/16/using-ansible-to-fetch-information-from-ios-devices/ > > , but that approach is on IOS so the command output is very different and I > can't seem to pass a regular expression to the cisco command from within > Ansible to even get something similar. > > Thanks > > Gav > > > > On Wednesday, 19 July 2017 08:02:05 UTC-5, Ganesh Nalawade wrote: >> >> If I understand this correctly, you want to run 2nd task (snmp update) >> based on the output of 1st task (get current snmp hosts). >> >> One way to do this is to use 'register' keyword to store the output of >> 1st task and use 'when' conditional to run the second task. >> >> - name: get current snmp hosts >> register: command_output >> ios_command: >> commands: "show snmp host" >> provider: "{{ ios_provider }}" >> *register: result* >> >> - name: snmp update >> ios_config: >> src: "./configs/snmp.conf" >> provider: "{{ ios_provider }}" >> match: none >> *when: "'<host'> in result.stdout[0]"* >> >> On Wed, Jul 19, 2017 at 6:10 PM, 'Gavin McKee' via Ansible Project < >> ansible...@googlegroups.com> wrote: >> >>> Hi Guys, >>> >>> Can someone advise on the following? >>> >>> I need to update (standardize) the SNMP trap receivers throughout the >>> network. Given that i'm running Cisco NX OS on the 3500 platform I can't >>> delete the old SNMP trap receiver configuration without specifying the >>> hosts. So I need to run a command and then parse the hosts from it. *I'd >>> like to then use the hosts in the returned output to delete the trap >>> receivers before adding the new correct receivers.* >>> >>> --- >>> - name: Update the SNMP information on the network >>> hosts: lab >>> gather_facts: no >>> connection: local >>> >>> vars: >>> trapdests: [] >>> ios_provider: >>> username: "{{ user }}" >>> password: "{{ password }}" >>> host: "{{ inventory_hostname }}" >>> >>> tasks: >>> - name: get current snmp hosts >>> register: command_output >>> ios_command: >>> commands: "show snmp host" >>> provider: "{{ ios_provider }}" >>> >>> - name: snmp update >>> ios_config: >>> src: "./configs/snmp.conf" >>> provider: "{{ ios_provider }}" >>> match: none >>> before: "default snmp-server" >>> >>> - debug: msg="{{command_output.stdout_lines}}" >>> >>> >>> Here is my output to this stage >>> >>> >>> < PLAY [Update the SNMP information on the network] > >>> --------------------------------------------------- >>> \ ^__^ >>> \ (oo)\_______ >>> (__)\ )\/\ >>> ||----w | >>> || || >>> >>> _______________________ >>> < TASK [test nxos snmp] > >>> ----------------------- >>> \ ^__^ >>> \ (oo)\_______ >>> (__)\ )\/\ >>> ||----w | >>> || || >>> >>> [WARNING]: argument host has been deprecated and will be removed in a >>> future version >>> >>> changed: [lab-xxx-xxx-xxxxx] >>> changed: [10.70.253.249] >>> _______________________________ >>> < TASK [get current snmp hosts] > >>> ------------------------------- >>> \ ^__^ >>> \ (oo)\_______ >>> (__)\ )\/\ >>> ||----w | >>> || || >>> >>> ok: [10.70.253.249] >>> ok: [lab-xxxx-xxx-xxxxx] >>> ____________________ >>> < TASK [snmp update] > >>> -------------------- >>> \ ^__^ >>> \ (oo)\_______ >>> (__)\ )\/\ >>> ||----w | >>> || || >>> >>> changed: [10.70.253.249] >>> changed: [lab-xxx-xxx-xxxx1x] >>> ______________ >>> < TASK [debug] > >>> -------------- >>> \ ^__^ >>> \ (oo)\_______ >>> (__)\ )\/\ >>> ||----w | >>> || || >>> >>> ok: [10.70.253.249] => { >>> "msg": [ >>> [ >>> "Source interface: >>> mgmt0-------------------------------------------------------------------", >>> "Host Port Version Level Type >>> SecName ", >>> >>> "-------------------------------------------------------------------", >>> "10.15.24.118 162 v2c noauth trap >>> xxxxx ", >>> "Use VRF: management", >>> >>> "-------------------------------------------------------------------", >>> "10.30.130.131 162 v2c noauth trap >>> xxxx ", >>> "Use VRF: management", >>> >>> "-------------------------------------------------------------------", >>> "10.50.74.49 162 v2c noauth trap >>> xxxxx ", >>> "Use VRF: management", >>> >>> "-------------------------------------------------------------------", >>> "10.50.74.50 162 v2c noauth trap >>> xxxx ", >>> "Use VRF: management", >>> >>> "-------------------------------------------------------------------", >>> "1.1.1.1 162 v2c noauth trap >>> TESTING ", >>> >>> "-------------------------------------------------------------------" >>> ] >>> ] >>> } >>> ok: [lab-db9-eng-acc01x] => { >>> "msg": [ >>> [ >>> >>> "-------------------------------------------------------------------", >>> "Host Port Version Level Type >>> SecName ", >>> >>> "-------------------------------------------------------------------", >>> "10.50.74.38 162 v2c noauth trap >>> xxxxx ", >>> >>> "-------------------------------------------------------------------", >>> "10.50.32.23 162 v2c noauth trap >>> xxxx ", >>> "Use VRF: management", >>> >>> "-------------------------------------------------------------------", >>> "10.50.74.50 162 v2c noauth trap >>> xxxx ", >>> "Use VRF: management", >>> >>> "-------------------------------------------------------------------", >>> "10.50.74.49 162 v2c noauth trap >>> xxxxxx ", >>> "Use VRF: management", >>> >>> "-------------------------------------------------------------------", >>> "10.30.130.131 162 v2c noauth trap >>> xxxx ", >>> "Use VRF: management", >>> >>> "-------------------------------------------------------------------", >>> "10.15.24.118 162 v2c noauth trap >>> xxxx ", >>> "Use VRF: management", >>> >>> "-------------------------------------------------------------------", >>> "1.1.1.1 162 v2c noauth trap >>> TESTING ", >>> >>> "-------------------------------------------------------------------" >>> ] >>> ] >>> } >>> ____________ >>> < PLAY RECAP > >>> ------------ >>> \ ^__^ >>> \ (oo)\_______ >>> (__)\ )\/\ >>> ||----w | >>> || || >>> >>> 10.70.253.249 : ok=4 changed=2 unreachable=0 >>> failed=0 >>> lab-xxx-xxx-xxx01x : ok=4 changed=2 unreachable=0 >>> failed=0 >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Ansible Project" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to ansible-proje...@googlegroups.com. >>> To post to this group, send email to ansible...@googlegroups.com. >>> To view this discussion 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