Adding custom Yang modules and TranAPI model #119

pradyp11 · 2016-05-31T14:22:58Z

HI,
I'm using lnctool --model ./toaster.yang transapi --aths ./paths_file to generate .c file and editing the file with required tranapi callback functions. and installing it as mentioned in https://rawgit.com/CESNET/libnetconf/master/doc/doxygen/html/d9/d25/transapi.html

I'm using netopeer-manager add --name toaster --model /toaster.yang --datastore /usr/loc to add the yang model to server and i can see .xml file added to /usr/local/etc/netopeer/modules.conf.d

I want to know is this the right way of adding the yang models because im not able to use edit-config on the yang models. It says datastore fails to validate. Please help me in solving it.

rkrejci · 2016-05-31T14:33:05Z

First, the data models are expected in YIN format, not YANG, see the netopeer-manager help:

  --model MODEL         File holding the main data model (YIN format).

So, please fix the path in XML file in modules.conf.d to YIN. Then try it again and if there will be still the problem with validation, please provide more information about the model, edit-config and the current content of the datastore being edited/validated.

Note: YANG is supported in the new generation of the tools - libyang, libnetconf2 and Netopeer2

pradyp11 · 2016-05-31T16:03:19Z

Thank you for your reply.I'm using yin format to add the model to server.
I have noticed the models are added to modules.conf.d as XMl which is in
/etc/netopeer/modules.conf.d . But the path should be
/usr/local/etc/netopeer/modules.conf.d . Is there any error in the path.

On Tue, May 31, 2016 at 10:33 AM, Radek Krejčí notifications@github.com
wrote:

First, the data models are expected in YIN format, not YANG, see the
netopeer-manager help:

--model MODEL File holding the main data model (YIN format).

So, please fix the path in XML file in modules.conf.d to YIN. Then try it
again and if there will be still the problem with validation, please
provide more information about the model, edit-config and the current
content of the datastore being edited/validated.

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pradyp11 · 2016-05-31T16:39:12Z

I'm using yin format to add the toaster model to server. but still i have the issue.

<edit-config>:
<?xml version='1.0' encoding='UTF-8'?>
<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="2">
  <edit-config>
    <target>
      <running/>
    </target>
    <config>
      <toast:toaster xmlns:toast="http://netconfcentral.org/ns/toaster">
        <toast:toasterManufacturer>Microsoft Toaster</toast:toasterManufacturer>
        <toast:toasterModelNumber>Acrobat Automatic</toast:toasterModelNumber>
        <toast:toasterStatus>up</toast:toasterStatus>
      </toast:toaster>
    </config>
  </edit-config>
</rpc>

reply

 ##### Error Reply or Operation Failed #####
<?xml version='1.0' encoding='UTF-8'?>
<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="2">
  <rpc-error>
    <error-type>application</error-type>
    <error-tag>access-denied</error-tag>
    <error-severity>error</error-severity>
    <error-message>creating "toaster" data node is not permitted.</error-message>
  </rpc-error>
</rpc-reply>

rkrejci · 2016-05-31T19:51:33Z

But the error does not say "datastore fails to validate" as you mentioned in the first comment. It says that you are not permitted to make changes - check the NACM settings.

rkrejci · 2016-05-31T19:55:59Z

or follow the First run configuration section in the netopeer server's README

pradyp11 · 2016-05-31T20:21:22Z

Sorry for the wrong attachment .

##### Error Reply or Operation Failed #####
<?xml version='1.0' encoding='UTF-8'?>
<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="1">
  <rpc-error>
    <error-type>application</error-type>
    <error-tag>operation-failed</error-tag>
    <error-severity>error</error-severity>
    <error-message>Datastore fails to validate (Did not expect element toasterManufacturer there)</error-message>
  </rpc-error>
</rpc-reply>

Turing machine example given in netopeer has a folder in /usr/lcoal/etc/netopeer/turing-machine which has datastore.xml,.rng,.xsl files but the toaster module i added into netopeer is not having any datastore.xml file. only toaster.xml file is added into the /usr/local/etc/netopeer/modules.conf.d/ . Does this have anything to do with the error?

rkrejci · 2016-05-31T21:02:40Z

now I see it - libnotconf and netopeer actually work correctly. The data defined by the toaster module are read-only, so you are not allowed to set them via edit-config. So the validation works correctly, it does not expect read-only data in configuration datastore, so the validation fails.

rkrejci · 2016-05-31T21:05:44Z

regarding the paths - netopeer-manager stores into the XML config the path to the data model (YIN). The validator files (RNG, XSL) are expected in the same location and with the specific name pattern. But they are not required, so libnetconf is able to work (in a limited way) without validator files.

pradyp11 · 2016-05-31T21:18:30Z

Thank you radek for your time to answer me. but i'm sorry to take more time of yours. i understood about read only data, but rpc request is also giving error.
RPC

<?xml version="1.0" encoding="UTF-8"?>
<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="d7daf740-2774-11e6-b2dd-00059a3c7a00">
  <toast:make-toast xmlns:toast="http://netconfcentral.org/ns/toaster">
    <toast:toasterDoneness>1</toast:toasterDoneness>
    <toast:toasterToastType>wheat-bread</toast:toasterToastType>
  </toast:make-toast>
</rpc>

RPC reply

 ##### Error Reply or Operation Failed #####
<?xml version='1.0' encoding='UTF-8'?>
<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="d7daf740-2774-11e6-b2dd-00059a3c7a00">
  <rpc-error>
    <error-type>application</error-type>
    <error-tag>operation-failed</error-tag>
    <error-severity>error</error-severity>
    <error-message>There is no device/data that could be affected.</error-message>
  </rpc-error>
</rpc-reply>

michalvasko · 2016-06-01T06:51:06Z

Hi,
could you please provide the output of netopeer-server when started like netopeer-server -v 2?

Regards,
Michal

pradyp11 · 2016-06-01T13:48:35Z

Result for netopeer-server -v2

root@mtznjv1nets02:/usr/local/bin# netopeer-server -v2
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model ietf-inet-types.
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model ietf-yang-types.
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model ietf-netconf-monitoring.
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model ietf-netconf-notifications.
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model nc-notifications.
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model notifications.
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model ietf-netconf-with-defaults.
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model ietf-netconf-acm.
netopeer-server[10947]: Datastore ietf-netconf-acm initiated with ID 8.
netopeer-server[10947]: Checking the default Events stream path
//var/lib/libnetconf//streams/.
netopeer-server[10947]: Adding augment model
"/usr/local/etc/netopeer/cfgnetopeer/ietf-x509-cert-to-name.yin"
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model ietf-x509-cert-to-name.
netopeer-server[10947]: Adding static transapi
"/usr/local/etc/netopeer/cfgnetopeer/ietf-netconf-server.yin"
netopeer-server[10947]: "ssh" features in "ietf-netconf-server" module
enabled.
netopeer-server[10947]: "inbound-ssh" features in "ietf-netconf-server"
module enabled.
netopeer-server[10947]: "outbound-ssh" features in "ietf-netconf-server"
module enabled.
netopeer-server[10947]: Datastore ietf-netconf-server initiated with ID
1804289384.
netopeer-server[10947]: Setting the default SSH configuration for the
ietf-netconf-server module...
netopeer-server[10947]: callback_srv_netconf_srv_listen_srv_port: SSH
listening on the port 830
netopeer-server[10947]: Adding static transapi
"/usr/local/etc/netopeer/cfgnetopeer/netopeer-cfgnetopeer.yin"
netopeer-server[10947]: "dynamic-modules" features in
"netopeer-cfgnetopeer" module enabled.
netopeer-server[10947]: "ssh" features in "netopeer-cfgnetopeer" module
enabled.
netopeer-server[10947]: Datastore netopeer-cfgnetopeer initiated with ID
846930887.
netopeer-server[10947]: Setting the default configuration for the
cfgnetopeer module...
netopeer-server[10947]: Setting the default configuration for the
cfgnetopeer module SSH...
netopeer-server[10947]: Adding transapi
"/usr/local/etc/netopeer/ietf-system/ietf-system.yin"
netopeer-server[10947]: "timezone-name" features in "ietf-system" module
enabled.
netopeer-server[10947]: "authentication" features in "ietf-system" module
enabled.
netopeer-server[10947]: "local-users" features in "ietf-system" module
enabled.
netopeer-server[10947]: Datastore ietf-system initiated with ID 1681692778.
netopeer-server[10947]: Model "ietf-system" transAPI: nothing changed.
netopeer-server[10947]: Starting FMON thread for ietf-system data model.
netopeer-server[10947]: Adding transapi
"/usr/local/etc/netopeer/turing-machine/turing-machine.yin"
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model turing-machine.
netopeer-server[10947]: Datastore turing-machine initiated with ID
1714636916.
netopeer-server[10947]: Adding base model
"/root/Downloads/netopeer-master/transAPI/toaster/toaster.yin"
netopeer-server[10947]: ncds_features_parse: no feature definitions found
in data model toaster.
netopeer-server[10947]: Datastore toaster initiated with ID 1957747794.
netopeer-server[10947]: Netopeer server successfully initialized.

On Wed, Jun 1, 2016 at 2:51 AM, michalvasko notifications@github.com
wrote:

Hi,
could you please provide the output of netopeer-server when started like netopeer-server
-v 2?

Regards,
Michal

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michalvasko · 2016-06-01T14:04:07Z

Hi,
the output seems fine, which leaves me clueless about why it isn't working. Do you use the standard toaster model (does namespace match the one in the RPC and is the RPC itself defined)? Maybe try properly removing netopeer-server with all its configuration files and reinstalling it. I have no better advice, sorry.

Regards,
Michal

pradyp11 · 2016-06-01T19:10:49Z

Hi Mical,
I reinstalled the netopeer-server but it is giving the error as below

Request

<?xml version='1.0' encoding='UTF-8'?>
<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="0">
  <edit-config>
    <target>
      <running/>
    </target>
    <config>
      <nacm:nacm xmlns:nacm="urn:ietf:params:xml:ns:yang:ietf-netconf-acm">
        <nacm:enable-nacm>true</nacm:enable-nacm>
      </nacm:nacm>
    </config>
  </edit-config>
</rpc>

Reply

 ##### Error Reply or Operation Failed #####
<?xml version='1.0' encoding='UTF-8'?>
<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="0">
  <rpc-error>
    <error-type>application</error-type>
    <error-tag>access-denied</error-tag>
    <error-severity>error</error-severity>
    <error-message>creating "nacm" data node is not permitted.</error-message>
  </rpc-error>
</rpc-reply>

This error is occuring for all the attributes i tried to do edit-config.
I tried to change the NACM settings given in https://rawgit.com/CESNET/libnetconf/master/doc/doxygen/html/dd/d59/nacm.html but no use, giving the same error.

rkrejci · 2016-06-01T20:42:27Z

Please follow the First run configuration section in the netopeer server's README. There are instructions about setting NACM. How did you solve this issue in the previous installation?

pradyp11 · 2016-06-01T20:55:56Z

Hi Mical,
thank you. I solved the issue by using the netopeer-configurator
settings. Please give me a best procedure to add the transapi module which
can solve the error of " there is no device to get affected" . This will
solve everything for me. Please help me to solve this.

On Wed, Jun 1, 2016 at 4:42 PM, Radek Krejčí notifications@github.com
wrote:

Please follow the First run configuration section in the netopeer
server's README
https://github.com/CESNET/netopeer/blob/master/server/README. There are
instructions about setting NACM. How did you solve the NACM setting in the
previous installation?

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michalvasko · 2016-06-02T06:52:52Z

Hi,
first, I would suggest you install our example turing-machine module. You can find it in netopeer/transAPI/turing directory, you just run ./configure, make, and # make install and it should get properly added to netopeer. Then you can try to execute of the 2 RPCs there, either initialize with some random string or run, which does not have any parameters. Without proper configuration it will not do much, but you should definitely not get the error of "no device to be affected".

Regards,
Michal

pradyp11 · 2016-06-02T13:45:36Z

Thank you Mical. Turing machine is running successfully.
I have noticed couple of differences:

1.when i run ./configure, make and make install turing machine is creating
its directory structure with datastore.xml, .rng, .xsl files in
/usr/local/etc/netopeer/turing but for the models i'm adding it is just
adding .xml file to /usr/local/etc/netopeer/modules.conf.d .
Using lnctool i'm creating transapi model also.

Makefile.in install code in turing machine is varying from my model
Makefile.in.

Does this two things have anything to do with the error i'm getting.

On Thu, Jun 2, 2016 at 2:52 AM, michalvasko notifications@github.com
wrote:

Hi,
first, I would suggest you install our example turing-machine module. You
can find it in netopeer/transAPI/turing directory, you just run
./configure, make, and # make install and it should get properly added to
netopeer. Then you can try to execute of the 2 RPCs there, either
initialize with some random string or run, which does not have any
parameters. Without proper configuration it will not do much, but you
should definitely not get the error of "no device to be affected".

Regards,
Michal

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michalvasko · 2016-06-02T13:58:24Z

Hi,

datastore.xml will be created automatically, .rng and *.xsl are validation files, which are not strictly required. So, you only need to add the module configuration XML file into *modules.conf.d. Turing module installation uses netopeer-manager for this and I suggest you do the same, it creates the correct XML file for you and adds the module properly. I just noticed that your netopeer-server -v2 output is actually not correct, it says "Adding base model .../toaster.yin", if you look at other modules, it says "Adding (static) transapi .../...". Indeed, your module configuration is wrong and use netopeer-manager to add modules, then it will work as expected.
I think I answered this in 1.

Regards,
Michal

rkrejci closed this as completed May 31, 2016

michalvasko reopened this Jun 1, 2016

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Adding custom Yang modules and TranAPI model #119

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Adding custom Yang modules and TranAPI model #119

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