T4268: monitoring: Fixed unnatural LA elevation

[andriiandrieiev]

Change Summary

Fixed LA elevation bug while using vyos monitoring (telegraf)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://phabricator.vyos.net/T4268

Component(s) name

monitoring (telegraf)

Proposed changes

Add collection jitter to omit LA elevation. Also increased an interval to reduce the load.

How to test

Enable monitoring service by conf mode and watch LA at least for 24h

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly