Comments (10)
hyberdk
commented on June 7, 2024
1
Okay, so I did some testing..
darn, I seem to be hitting the "enum +" bug again, I was sure I tested it before and it worked.. well I guess more testing is needed.. (could ydk-gen have installed an old version of libyang?)
Anywho.. regarding the case of filename.. yup, it seems to do the trick.. now it downloads the submodules without any revision..
2023-11-15 23:28:36,501 - ydk - DEBUG - Getting module 'Cisco-IOS-XE-native' submodule 'Cisco-IOS-XE-ip' with revision none
2023-11-15 23:28:36,501 - ydk - DEBUG - Looking for file in folder: /home/eslau/.ydk/10.12.35.56
2023-11-15 23:28:36,501 - ydk - DEBUG - Opening file '/home/eslau/.ydk/10.12.35.56/Cisco-IOS-XE-ip.yang'
2023-11-15 23:28:36,501 - ydk - DEBUG - File '/home/eslau/.ydk/10.12.35.56/Cisco-IOS-XE-ip.yang' is not found in repository
2023-11-15 23:28:36,501 - ydk - DEBUG - Getting submodule 'Cisco-IOS-XE-ip' using get-schema
2023-11-15 23:28:36,501 - ydk - DEBUG - NetconfSSHClient: NC session status: 1
2023-11-15 23:28:36,501 - ydk - DEBUG - Trace: Missing message-id in rpc.
2023-11-15 23:28:36,501 - ydk - DEBUG - Netconf SSH Client: sending RPC
2023-11-15 23:28:36,501 - ydk - DEBUG - Trace: Writing message (session 32):
<?xml version="1.0"?>
<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="11">
<get-schema xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-monitoring">
<identifier>Cisco-IOS-XE-ip</identifier>
<format>yang</format>
</get-schema>
</rpc>
2023-11-15 23:28:36,501 - ydk - DEBUG - NetconfSSHClient: NC session status: 1
2023-11-15 23:28:36,501 - ydk - DEBUG - Netconf SSH Client: receiving reply RPC
2023-11-15 23:28:36,579 - ydk - DEBUG - Trace: Received message (session 32):
<?xml version="1.0" encoding="UTF-8"?>
<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="11"><data xmlns='urn:ietf:params:xml:ns:yang:ietf-netconf-monitoring'><
ygorelik
commented on June 7, 2024
That must be an issue in the model on the device. The YDK gets list of modules from device capabilities. When needed the module is requested to be downloaded from the device.
As a workaround I suggest removing the revision from the model name in the repo. When YDK finds the model in the repo, it will not download it from the device:
cd ~/.ydk/10.12.35.56
mv [email protected] Cisco-IOS-XE-ip.yang
from ydk-gen.
hyberdk
commented on June 7, 2024
If the model exist, but without the revision, it downloads the model again with revision, so my only option is to copy the model edit the yang-model update the revision for a workaround..
But if I use this script, to get the modules list, it does clearly states the correct version numbers.
from ncclient import manager
import xml.dom.minidom
device_params = {
"host": "<ip>",
"port": 830,
"username": "<username>",
"password": "<password>",
}
filter = ('subtree', """
<modules-state xmlns="urn:ietf:params:xml:ns:yang:ietf-yang-library">
</modules-state>
""")
with manager.connect(**device_params, hostkey_verify=False) as netconf_session:
netconf_response = netconf_session.get(filter=filter)
print(xml.dom.minidom.parseString(netconf_response.xml).toprettyxml())here is a snip (output very long, but attached here: modules_output.xml.txt ) from the native model
<module>
<name>Cisco-IOS-XE-native</name>
<revision>2021-08-10</revision>
<schema>http://localhost:9938/restconf/tailf/modules/Cisco-IOS-XE-native/2021-08-10</schema>
<namespace>http://cisco.com/ns/yang/Cisco-IOS-XE-native</namespace>
<deviation>
<name>Cisco-IOS-XE-cts-routing-deviation</name>
<revision>2020-08-26</revision>
</deviation>
<deviation>
<name>Cisco-IOS-XE-dialer-deviation</name>
<revision>2020-07-01</revision>
</deviation>
<deviation>
<name>Cisco-IOS-XE-ethernet-deviation</name>
<revision>2021-07-01</revision>
</deviation>
<deviation>
<name>Cisco-IOS-XE-lisp-deviation</name>
<revision>2021-07-10</revision>
</deviation>
<deviation>
<name>Cisco-IOS-XE-nd-deviation</name>
<revision>2020-06-09</revision>
</deviation>
<deviation>
<name>Cisco-IOS-XE-ospfv3-deviation</name>
<revision>2021-01-08</revision>
</deviation>
<deviation>
<name>Cisco-IOS-XE-policy-deviation</name>
<revision>2021-07-01</revision>
</deviation>
<deviation>
<name>Cisco-IOS-XE-port-channel-deviation</name>
<revision>2020-11-01</revision>
</deviation>
<deviation>
<name>Cisco-IOS-XE-power-deviation</name>
<revision>2019-04-17</revision>
</deviation>
<deviation>
<name>Cisco-IOS-XE-sanet-deviation</name>
<revision>2020-07-01</revision>
</deviation>
<conformance-type>implement</conformance-type>
<submodule>
<name>Cisco-IOS-XE-interfaces</name>
<revision>2021-07-10</revision>
<schema>http://localhost:9938/restconf/tailf/modules/Cisco-IOS-XE-interfaces/2021-07-10</schema>
</submodule>
<submodule>
<name>Cisco-IOS-XE-ip</name>
<revision>2021-07-10</revision>
<schema>http://localhost:9938/restconf/tailf/modules/Cisco-IOS-XE-ip/2021-07-10</schema>
</submodule>
<submodule>
<name>Cisco-IOS-XE-ipv6</name>
<revision>2021-07-01</revision>
<schema>http://localhost:9938/restconf/tailf/modules/Cisco-IOS-XE-ipv6/2021-07-01</schema>
</submodule>
<submodule>
<name>Cisco-IOS-XE-license</name>
<revision>2020-11-01</revision>
<schema>http://localhost:9938/restconf/tailf/modules/Cisco-IOS-XE-license/2020-11-01</schema>
</submodule>
<submodule>
<name>Cisco-IOS-XE-line</name>
<revision>2021-07-01</revision>
<schema>http://localhost:9938/restconf/tailf/modules/Cisco-IOS-XE-line/2021-07-01</schema>
</submodule>
<submodule>
<name>Cisco-IOS-XE-logging</name>
<revision>2020-11-01</revision>
<schema>http://localhost:9938/restconf/tailf/modules/Cisco-IOS-XE-logging/2020-11-01</schema>
</submodule>
<submodule>
<name>Cisco-IOS-XE-parser</name>
<revision>2019-07-01</revision>
<schema>http://localhost:9938/restconf/tailf/modules/Cisco-IOS-XE-parser/2019-07-01</schema>
</submodule>
</module>As you can see the revisions are fine, but when I look in the tmp folder, they are all the native parent modules revision..
at least the ones that are submodules to the native model
I cant make this add up :-)
Esben
from ydk-gen.
hyberdk
commented on June 7, 2024
Hi @ygorelik,
Im not sure you get notified when the issue is closed, so Im trying to mention you directly. In my previous post, you can see that models from my router seems fine. I have been looking further into this, although I do not really do c++ code, I have narrowed it down to this section:
extern "C" char* get_module_callback(const char* module_name, const char* module_rev, const char *submod_name, const char *sub_rev,
void* user_data, LYS_INFORMAT* format, void (**free_module_data)(void *model_data))
{
YLOG_DEBUG("Getting module '{}' submodule '{}'", module_name, (submod_name?submod_name:"none"));
*free_module_data = c_free_data;
if(user_data != nullptr){
ModelProvider::Format m_format = ModelProvider::Format::YANG;
*format = LYS_IN_YANG;
auto repo = reinterpret_cast<const RepositoryPtr*>(user_data);
//first check our directory for a file of the form <module-module_name>@<module_rev-date>.yang
YLOG_DEBUG("Looking for file in folder: {}", repo->path);
std::string yang_file_path{repo->path};
std::string yang_file_path_no_revision{repo->path};
yang_file_path += '/';
yang_file_path += (submod_name?submod_name:module_name);
yang_file_path_no_revision += yang_file_path;
if(submod_name && sub_rev){
yang_file_path += "@";
yang_file_path += sub_rev;
}
else if(module_name && module_rev){
yang_file_path += "@";
yang_file_path += module_rev;
}
yang_file_path += ".yang";
YLOG_DEBUG("Opening file '{}'", yang_file_path);
if (file_exists(yang_file_path) || file_exists(yang_file_path_no_revision)) {
if (file_exists(yang_file_path))
YLOG_DEBUG("Path found with revision: {}", yang_file_path);
else
YLOG_DEBUG("Path found without revision: {}", yang_file_path_no_revision);
//open the file read the data and return it
std::string model_data {""};
std::ifstream yang_file {yang_file_path};
if(yang_file.is_open()) {
std::string line;
while(std::getline(yang_file, line)){
model_data+=line;
model_data+='\n';
}
yang_file.close();
return get_enlarged_data(model_data, yang_file_path);
} else {
YLOG_ERROR("Cannot open file '{}'", yang_file_path);
throw(YIllegalStateError("Cannot open file " + yang_file_path));
}
}
else {
YLOG_DEBUG("File '{}' is not found in repository", yang_file_path);
}
for(auto model_provider : repo->get_model_providers()) {
std::string model_data{};
if(submod_name)
{
YLOG_DEBUG("Getting submodule '{}' using get-schema", submod_name);
model_data = model_provider->get_model(submod_name, sub_rev != nullptr ? sub_rev : "", m_format);
}
else
{
YLOG_DEBUG("Getting module '{}' using get-schema", module_name);
model_data = model_provider->get_model(module_name, module_rev != nullptr ? module_rev : "", m_format);
}
if(!model_data.empty()){
sink_to_file(yang_file_path, model_data);
return get_enlarged_data(model_data, yang_file_path);
}
}
}
YLOG_ERROR("Cannot find model with module name '{}'", module_name);
//throw(YServiceProviderError("Cannot find model with module name: " + std::string(module_name)));
return {};
}
}
}and I do agree that it seems like the code is supposed to download the revision of the submodule, but that is not what I am seeing..
here is a snip from the log:
2023-11-13 21:49:39,333 - ydk - DEBUG - Getting module 'Cisco-IOS-XE-native' submodule 'Cisco-IOS-XE-ip'
2023-11-13 21:49:39,334 - ydk - DEBUG - Looking for file in folder: /home/eslau/.ydk/10.12.35.56
2023-11-13 21:49:39,334 - ydk - DEBUG - Opening file '/home/eslau/.ydk/10.12.35.56/[email protected]'
2023-11-13 21:49:39,335 - ydk - DEBUG - File '/home/eslau/.ydk/10.12.35.56/[email protected]' is not found in repository
2023-11-13 21:49:39,335 - ydk - DEBUG - Getting submodule 'Cisco-IOS-XE-ip' using get-schema
2023-11-13 21:49:39,336 - ydk - DEBUG - NetconfSSHClient: NC session status: 1
2023-11-13 21:49:39,336 - ydk - DEBUG - Trace: Missing message-id in rpc.
2023-11-13 21:49:39,336 - ydk - DEBUG - Netconf SSH Client: sending RPC
2023-11-13 21:49:39,336 - ydk - DEBUG - Trace: Writing message (session 25):
<?xml version="1.0"?>
<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="2">
<get-schema xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-monitoring">
<identifier>Cisco-IOS-XE-ip</identifier>
<format>yang</format>
</get-schema>
</rpc>
2023-11-13 21:49:39,337 - ydk - DEBUG - NetconfSSHClient: NC session status: 1
2023-11-13 21:49:39,337 - ydk - DEBUG - Netconf SSH Client: receiving reply RPC
2023-11-13 21:49:39,425 - ydk - DEBUG - Trace: Received message (session 25):
<?xml version="1.0" encoding="UTF-8"?>
<rpc-reply xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="2"><data xmlns='urn:ietf:params:xml:ns:yang:ietf-netconf-monitoring'><![CDATA[submodule Cisco-IOS-XE-ip {
belongs-to Cisco-IOS-XE-native {
prefix ios;
}
import cisco-semver {
prefix cisco-semver;
}
import ietf-inet-types {
prefix inet;
}
import Cisco-IOS-XE-types {
prefix ios-types;
}
import Cisco-IOS-XE-interface-common {
prefix ios-ifc;
}
import Cisco-IOS-XE-features {
prefix ios-features;
}
include Cisco-IOS-XE-interfaces;
organization
"Cisco Systems, Inc.";
contact
"Cisco Systems, Inc.
Customer Service
Postal: 170 W Tasman Drive
San Jose, CA 95134
Tel: +1 1800 553-NETS
E-mail: [email protected]";
description
"Cisco XE Native IP Yang Model.
Copyright (c) 2016-2021 by Cisco Systems, Inc.
All rights reserved.";
revision 2021-07-10 {
description
"- Added container vxlan for Tenant Routed Multicast Data MDT support";
cisco-semver:module-version "7.0.17060(m)";
}
revision 2021-07-01 {
description
"- Added ip ssh bulk-mode support
- Fixed configuration roll-back ordering for ip prefix-lists in controller mode
- Added new allow-evpn leaf
- Added support to include interface module for fixing yang errors
- Changed 'ip ssh source-interface' from leaf to container
- Fixed the must constraints of mdt model";
cisco-semver:module-version "7.0.0";
}
You can see that it is trying to open file Opening file '/home/eslau/.ydk/10.12.35.56/[email protected]', but if you look further down in the actual yang model, the first revision is revision 2021-07-10 and not revision 2021-08-10
Also if it tried to download a revision 2021-08-10 from my router it would fail (I tried manually with ncclient)..
Further up in the log file, I do also see this section:
<submodule>
<name>Cisco-IOS-XE-ip</name>
<revision>2021-07-10</revision>
<schema>http://localhost:9938/restconf/tailf/modules/Cisco-IOS-XE-ip/2021-07-10</schema>
</submodule>which is also the correct version... I have attached the full log output here:
log.txt
I really dont see how the YDK comes to the conclusion that the correct revision is 2021-08-10.. I also tried to place the Cisco-IOS-XE-ip.yang file in the repo, but it does not find/use that file, which is also a little strange as the c++ code seems to suggest that it would..
Please can you have another look at it :-)
Thanks a lot!
Esben
from ydk-gen.
hyberdk
commented on June 7, 2024
Hi @ygorelik,
So I did some more testing..
I modified the code to look like this (added more logging):
extern "C" char* get_module_callback(const char* module_name, const char* module_rev, const char *submod_name, const char *sub_rev,
void* user_data, LYS_INFORMAT* format, void (**free_module_data)(void *model_data))
{
YLOG_DEBUG("submod_name '{}' sub_rev '{}'", (submod_name?submod_name:"unknown"), (sub_rev?sub_rev:"unknown"));
YLOG_DEBUG("Getting module '{}' submodule '{}'", module_name, (submod_name?submod_name:"none"));
*free_module_data = c_free_data;
if(user_data != nullptr){
ModelProvider::Format m_format = ModelProvider::Format::YANG;
*format = LYS_IN_YANG;
auto repo = reinterpret_cast<const RepositoryPtr*>(user_data);
//first check our directory for a file of the form <module-module_name>@<module_rev-date>.yang
YLOG_DEBUG("Looking for file in folder: {}", repo->path);
std::string yang_file_path{repo->path};
std::string yang_file_path_no_revision{repo->path};
yang_file_path += '/';
yang_file_path += (submod_name?submod_name:module_name);
yang_file_path_no_revision += yang_file_path;
if(submod_name && sub_rev){
YLOG_DEBUG("found submodule with revision: submodule '{}' and revision '{}'", submod_name, sub_rev);
yang_file_path += "@";
yang_file_path += sub_rev;
}
else if(module_name && module_rev){
YLOG_DEBUG("found module with revision: module '{}' and revision '{}'", module_name, module_rev);
yang_file_path += "@";
yang_file_path += module_rev;
}
yang_file_path += ".yang";
YLOG_DEBUG("Opening file '{}'", yang_file_path);
if (file_exists(yang_file_path) || file_exists(yang_file_path_no_revision)) {
if (file_exists(yang_file_path))here is the log output..
2023-11-13 23:51:58,354 - ydk - DEBUG - submod_name 'Cisco-IOS-XE-ip' sub_rev 'unknown'
2023-11-13 23:51:58,354 - ydk - DEBUG - Getting module 'Cisco-IOS-XE-native' submodule 'Cisco-IOS-XE-ip'
2023-11-13 23:51:58,354 - ydk - DEBUG - Looking for file in folder: /home/eslau/.ydk/10.12.35.56
2023-11-13 23:51:58,355 - ydk - DEBUG - found module with revision: module 'Cisco-IOS-XE-native' and revision '2021-08-10'
2023-11-13 23:51:58,355 - ydk - DEBUG - Opening file '/home/eslau/.ydk/10.12.35.56/[email protected]'
2023-11-13 23:51:58,355 - ydk - DEBUG - File '/home/eslau/.ydk/10.12.35.56/[email protected]' is not found in repository
2023-11-13 23:51:58,355 - ydk - DEBUG - Getting submodule 'Cisco-IOS-XE-ip' using get-schema
2023-11-13 23:51:58,355 - ydk - DEBUG - NetconfSSHClient: NC session status: 1
2023-11-13 23:51:58,355 - ydk - DEBUG - Trace: Missing message-id in rpc.
2023-11-13 23:51:58,355 - ydk - DEBUG - Netconf SSH Client: sending RPC
2023-11-13 23:51:58,356 - ydk - DEBUG - Trace: Writing message (session 38):
So as you can see, when the submodule are to be downloaded, no sub_rev is sent to the function. This means that if(submod_name && sub_rev) is always false.. and it goes to the else if statement..
and since that is true (there is both a module and submodule) it actually grabs the revision from the "main" module and puts that into the submodule..
Its getting late here, but I guess the quick fix would be to do something like:
if(submod_name && sub_rev){
YLOG_DEBUG("found submodule with revision: submodule '{}' and revision '{}'", submod_name, sub_rev);
yang_file_path += "@";
yang_file_path += sub_rev;
}
else if(submod_name){
YLOG_DEBUG("found submodule without revision: submodule '{}'", submod_name);
}
else if(module_name && module_rev){
YLOG_DEBUG("found module with revision: module '{}' and revision '{}'", module_name, module_rev);
yang_file_path += "@";
yang_file_path += module_rev;
}but I do not know if that will break something else.. I will see if I can find time tomorrow for more test..
Esben
from ydk-gen.
ygorelik
commented on June 7, 2024
Hi Esben
You code change might be OK, but there are a bit more (check the commit).
Could you please try to run updated version of YDK-0.8.6.6 from my fork master branch?
Let me know the results.
Yan
from ydk-gen.
hyberdk
commented on June 7, 2024
Hi Yan,
thanks for looking into this I've been looking though the code, I think I follow your process here..
looking though the code, I think it makes sense. I will for sure check it out and give feedback!
Just a sorta off topic comment, if you are going to release a new maintenance version, it might make sense to bump pyang to version 2.6.0 as there are some fixes in there regarding scoping of submodules and augmenting models with when statements. see mbj4668/pyang@dc97553 it was essential for me to make the Cisco-IOS-XE-*.yang models pass linting and generate the models..
Also it seems that the latest version of libyang (CESNET/libyang@7e5ea21) fixes the problem #1083, #1093. I am not 100% sure yet, but it seems like at least yang v1.1 allows enum without quotes (see https://datatracker.ietf.org/doc/html/rfc7950#section-9.6.5). Anyways, I need to do more testing, but it seems like libyang v2.1.128 fixes my problem with the enum named +
As I said before I am not a c++ programmer, so I would not know how to set the depending version of libyang in the c code. :-)
Anyways, thanks for looking into this for me.. I seem to be on the verge of a breakthrough getting YDK-GEN to work for me and my Cisco XE 17.x.x versions..
from ydk-gen.
hyberdk
commented on June 7, 2024
okay, it is the
leaf offset {
status obsolete;
type enumeration {
enum "+";
enum "-";
}in the Cisco-IOS-XE-native.yang module that is causing the problems. It is a little strange, if I generate the python package with the module like above (with the quotes) it works fine.. but if I leave it like its in the models from Cisco it fails.
Funny thing is though.. it is only during the request and its using the model in the python package.. once data is returned from the router it parses the data just fine even though the downloaded model is without the quotes on "+" and "-"
Im doing this:
result = netconf.get_config(provider, Datastore.running, read_filter=native) # read running config
codec_provider = CodecServiceProvider(type='json')
codec = CodecService()
json_data = codec.encode(codec_provider, result, subtree=True)
print(json.dumps(json.loads(json_data), indent=4))2023-11-16 00:13:35,178 - ydk.types.Entity - DEBUG - Leaf data name: "ipv4-host", value: "9.9.9.9", yfilter: "YFilter.not_set", is_set: "True"
2023-11-16 00:13:35,178 - ydk - DEBUG - JsonCodec: Children count for 'host[ipv4-host='9.9.9.9']': 0
{
"Cisco-IOS-XE-native:native": {
"ip": {
"access-list": {
"Cisco-IOS-XE-acl:extended": [
{
"access-list-seq-rule": [
{
"ace-rule": {
"action": "permit",
"dst-any": null,
"ipv4-address": "185.32.192.0",
"mask": "0.0.0.255",
"protocol": "ip"
},
"sequence": 10
},
{
"ace-rule": {
"action": "permit",
"any": null,
"dest-ipv4-address": "185.32.192.0",
"dest-mask": "0.0.0.255",
"protocol": "ip"
},
"sequence": 20
},
{
"ace-rule": {
<snip>That is really strange!
anyways, its late I better hit the sack.. again thanks for your help!
Esben
from ydk-gen.
ygorelik
commented on June 7, 2024
Hi Esben
You are right, the YDK uses older version of YDK. The upgrade would require significant makeover of the C++ code. This possibly a task for future release. In the meanwhile I will upgrade pyang to the latest version.
For the last comment. I do not understand what is the issue. And the XML load is not visible. If true, please open new issue with all the supporting materials.
Thanks for the verification.
Yan
from ydk-gen.
ygorelik
commented on June 7, 2024
The resolution of this bug is in my private fork, see details in commit 0f63489.
from ydk-gen.
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