modifying snmp psu test to fit format using psu keys instead of index

[gregoryboudreau]

Description of PR

Modifies SNMP test cases to use ordered offsets of psu keys instead of direct indexing for PSU information in the snmp facts

Summary:
Fixes testcase to work with modifications as a part of sonic-net/sonic-snmpagent#312

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• Test case(new/improvement)

Back port request

• 201911
• 202012
• 202205
• 202305
• 202311

Approach

What is the motivation for this PR?

Fix SNMP test case to work with new implementation for psus

How did you do it?

Have snmp_psu info being traversed via an ordered offset for comparison with the SNMP populated facts

How did you verify/test it?

Ran modified test cases on Cisco SONiC distributed chassis

Any platform specific information?

Supported testbed topology if it's a new test case?

Documentation

Related PRs:
sonic-net/sonic-utilities#3208
sonic-net/sonic-platform-daemons#446
sonic-net/sonic-snmpagent#312

[mssonicbld]

The pre-commit check detected issues in the files touched by this pull request.
The pre-commit check is a mandatory check, please fix detected issues.

Detailed pre-commit check results:
trim trailing whitespace.................................................Passed
fix end of files.........................................................Passed
check yaml...........................................(no files to check)Skipped
check for added large files..............................................Passed
check python ast.........................................................Passed
flake8...................................................................Failed
- hook id: flake8
- exit code: 1

tests/snmp/test_snmp_psu.py:15:1: E302 expected 2 blank lines, found 1

flake8...............................................(no files to check)Skipped
check conditional mark sort..........................(no files to check)Skipped

To run the pre-commit checks locally, you can follow below steps:

1. Ensure that default python is python3. In sonic-mgmt docker container, default python is python2. You can run
   the check by activating the python3 virtual environment in sonic-mgmt docker container or outside of sonic-mgmt
   docker container.
2. Ensure that the pre-commit package is installed:

sudo pip install pre-commit

3. Go to repository root folder
4. Install the pre-commit hooks:

pre-commit install

5. Use pre-commit to check staged file:

pre-commit

6. Alternatively, you can check committed files using:

pre-commit run --from-ref <commit_id> --to-ref <commit_id>

[gechiang]

/azp run

[azure-pipelines]

Commenter does not have sufficient privileges for PR 11944 in repo sonic-net/sonic-mgmt

[gechiang]

@wangxin , @prgeor
Please help review and restart the PR tests so that we can get fresh status to see what is the issue with the build failure.

[gregoryboudreau]

@wangxin , @prgeor Please help review and restart the PR tests so that we can get fresh status to see what is the issue with the build failure.

seems that kvmtest-t0 is timing out after about 75% completion, seems its getting stuck somewhere. I wouldn't expect this behavior to happen as a result of this PR, worst this would do is cause a failure on the specific case though it shouldn't.

[gechiang]

@wangxin , @prgeor Please help review and restart the PR tests so that we can get fresh status to see what is the issue with the build failure.

seems that kvmtest-t0 is timing out after about 75% completion, seems its getting stuck somewhere. I wouldn't expect this behavior to happen as a result of this PR, worst this would do is cause a failure on the specific case though it shouldn't.

Have kickstart the test again to see if it can pass now...

[abdosi]

@SuvarnaMeenakshi : can you help review of this ?

[mssonicbld]

The pre-commit check detected issues in the files touched by this pull request.
The pre-commit check is a mandatory check, please fix detected issues.

Detailed pre-commit check results:
trim trailing whitespace.................................................Passed
fix end of files.........................................................Passed
check yaml...........................................(no files to check)Skipped
check for added large files..............................................Passed
check python ast.........................................................Passed
flake8...................................................................Failed
- hook id: flake8
- exit code: 1

tests/snmp/test_snmp_psu.py:6:1: F811 redefinition of unused 'logging' from line 2

flake8...............................................(no files to check)Skipped
check conditional mark sort..........................(no files to check)Skipped

To run the pre-commit checks locally, you can follow below steps:

1. Ensure that default python is python3. In sonic-mgmt docker container, default python is python2. You can run
   the check by activating the python3 virtual environment in sonic-mgmt docker container or outside of sonic-mgmt
   docker container.
2. Ensure that the pre-commit package is installed:

sudo pip install pre-commit

3. Go to repository root folder
4. Install the pre-commit hooks:

pre-commit install

5. Use pre-commit to check staged file:

pre-commit

6. Alternatively, you can check committed files using:

pre-commit run --from-ref <commit_id> --to-ref <commit_id>

[bpar9]

lgtm

[yejianquan]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[yejianquan]

@gregoryboudreau snmp/test_snmp_psu.py is failing in the PR test, please check

[gregoryboudreau]

@gregoryboudreau snmp/test_snmp_psu.py is failing in the PR test, please check

if I had to guess, it seems the issue is due to a query for the PSU keys being piped into natsort occurring before the check below:

    # For kvm testbed, there is no snmp psu info
    if duthost.facts["asic_type"] == "vs":
        logging.info("No snmp psu info on kvm testbed.")
        return

Was a miss on my part! Will update.