[AI Generated] BugFix: support nfs-server.service unit name on SLES 16

[LiliDeng]

Problem

On SLES 16, perf_storage_over_nfs_sriov_tcp_4k (and any other test using NFSServer) fails at the configure step with:

Failed to restart nfsserver.service: Unit nfsserver.service not found.
AssertionError: [Get unexpected exit code on cmd ['sudo', 'sh', '-c', 'systemctl restart nfsserver']] Expected <[0, 0]> to contain item <5>, but did not.

Root cause: SLES 16 ships the upstream nfs-utils systemd unit (nfs-server.service) and no longer provides the legacy SUSE nfsserver.service alias. lisa/tools/nfs_server.py hard-codes nfsserver on the Suse branch, so systemctl restart nfsserver returns exit code 5 (Unit not found).

Note: _check_exists() already used nfs-server for Suse, but create_shared_dir, is_running and stop still used nfsserver — inconsistent.

Fix

Add _get_suse_service_name() which probes nfs-server first, then falls back to legacy nfsserver via Service.check_service_exists(). All four Suse branches now use the helper, so:

• SLES 12 / 15 → resolves to nfsserver
• SLES 16+ → resolves to nfs-server

Validation

suse sles-16-0-x86-64 gen1 2026.02.05 / Standard_DS3_v2 — case perf_storage_over_nfs_sriov_tcp_4k. passed

Related

• Pattern matches sibling fix [AI Generated] BugFix: find sshd_config on SUSE/SLES 16 without scanning entire root fs #4487 (sshd_config on SLES 16)

[Copilot]

Pull request overview

Fixes NFS server tool to support SLES 16, which renamed the systemd unit from nfsserver.service to nfs-server.service. Introduces a helper that probes both names and routes all Suse branches through it, eliminating the prior inconsistency between _check_exists() (already using nfs-server) and the other methods.

Changes:

• Add _get_suse_service_name() helper that probes nfs-server first, then falls back to nfsserver.
• Replace hard-coded "nfsserver" in create_shared_dir, is_running, stop, and _check_exists with the helper.

[github-actions]

✅ AI Test Selection — PASSED

2 test case(s) selected (view run)

Marketplace image: suse sles-15-sp6 gen2 latest

	Count
✅ Passed	1
❌ Failed	0
⏭️ Skipped	1
Total	2

Test case details

Test Case	Status	Time (s)	Message
perf_storage_over_nfs_synthetic_udp_4k (lisa_0_1)	⏭️ SKIPPED	162.351	skipped: NFS server does not support UDP. Server portlist: tcp 2049
tcp 2049
perf_storage_over_nfs_sriov_tcp_4k (lisa_0_0)	✅ PASSED	3024.576

[LiliDeng]

Validation: PASSED.

• Image: suse sles-16-0-x86-64 gen1 2026.02.05
• VM size: Standard_DS3_v2
• Test: perf_storage_over_nfs_sriov_tcp_4k
• Elapsed: 3183.948 sec
• Result: PASSED

Log shows systemctl restart nfs-server succeeded; NFS share mounted; all 40 fio iterations (4K randread/randwrite/read/write at iodepths 1..1024) completed without error.

[LiliDeng]

Regression validation: PASSED on Redhat (no regression).

• Image: redhat rhel 10_1 10.1.2026022409
• VM size: Standard_DS3_v2
• Test: perf_storage_over_nfs_sriov_tcp_4k
• Elapsed: 2446.025 sec
• Result: PASSED

Redhat branch still uses nfs-server.service unchanged; helper is Suse-only, so other distros are unaffected.