Is it platform specific

generic

Importance or Severity

Critical

Description of the bug

YANG mandates that boolean values are true and false, having the first letter be capital as is represented by Python would cause yang validation failures inside of libyang.

sonic-cfggen is sometimes outputting these values as True and False leading to YANG validation failures.

Steps to Reproduce

This can be seen, for instance, when setting:

"MGMT_VRF_CONFIG": {
  "vrf_global": {
    "mgmtVrfEnabled": "true"
  }
}

Then running config save -y. The written value is then "True", if then just running config replace /etc/sonic/config_db.json it would result in an error of:

Invalid value "True" in "mgmtVrfEnabled" element.

Actual Behavior and Expected Behavior

Should be output as "true" instead of "True" when writing the config.

Relevant log output

Output of show version, show techsupport

Attach files (if any)

No response

Implementation

• sonic-cfggen should return boolean values as lowercase true and false #22526
• config_db should not mandate True and False for featured sonic-host-services#252