Add chrony NTP synchronization test (New)

[JasonLeonnn]

Description

The previous networking/ntp test depends on ntpdate which was deprecated in Ubuntu 15.10 and replaced by systemd-timesyncd. Starting with Ubuntu 25.10, chrony has replaced systemd-timesyncd.
Because of this, a new test case for NTP synchronization with chrony.

Resolved issues

• Created a new chrony-based script, implement one hour skew, sync using configured NTP sources, and verify.
• Updated networking and dock jobs

Documentation

Jira ticket

Tests

Ubuntu 25.10+: Runs networking/ntp-chrony.
Ubuntu < 25.10: Falls back to networking/ntp.
Ubuntu Core 26: Environment check added to automatically skip networking/ntp-chrony (UC relies on systemd-timesyncd and NTP jobs are excluded from the UC test plan).

Ubuntu 26.04: Result
Ubuntu 24.04: Result
Ubuntu Core 26: Result

WARNING: This modifies com.canonical.certification::sru-server

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.38%. Comparing base (b1a785f) to head (cccd644).
⚠️ Report is 17 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2811      +/-   ##
==========================================
+ Coverage   61.29%   61.38%   +0.08%     
==========================================
  Files         498      500       +2     
  Lines       50275    50400     +125     
  Branches     8834     8844      +10     
==========================================
+ Hits        30817    30938     +121     
- Misses      18616    18623       +7     
+ Partials      842      839       -3     

Flag	Coverage Δ
provider-base	40.03% <100.00%> (+0.40%)	⬆️

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[Copilot]

Pull request overview

Adds a chrony-based replacement for the existing NTP synchronization test in the base provider, updating job definitions so the networking/ntp coverage can work on Ubuntu releases where chrony has replaced systemd-timesyncd.

Changes:

• Replace networking/ntp job command to use a new network_ntp_chrony_test.py chrony-driven implementation.
• Update networking + dock job requirements to require the chrony package.
• Adjust packaging metadata to add chrony as the Ubuntu dependency for networking tests (currently only for >= 25.10).

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 3 comments.

File	Description
providers/base/units/networking/packaging.pxu	Switch Ubuntu packaging dependency from ntpdate/ntpsec-ntpdate to chrony for >= 25.10.
providers/base/units/networking/jobs.pxu	Update networking/ntp job to require chrony and run the new chrony-based script.
providers/base/units/dock/jobs.pxu	Update dock NTP jobs to require chrony and run the new chrony-based script.
providers/base/bin/network_ntp_chrony_test.py	New chrony-driven implementation that skews time by 1 hour, resyncs via configured sources, and verifies recovery.

Suppressed comments (1)

providers/base/units/dock/jobs.pxu:2686

• This dock NTP job still declares estimated_duration: 10s, but the new chrony script’s default --timeout is 60s (and can legitimately take close to that). The estimate should be updated to avoid misleading scheduling/UX for long-running tests.

    package.name == 'chrony'
user: root
command: network_ntp_chrony_test.py
estimated_duration: 10.00

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[clairlin53]

@JasonLeonnn Please provide the submission test result

[tomli380576]

sry just 1 more small comment

[baconYao]

LGTM

[tomli380576]

LGTM