Files
hermes-agent/tests/hermes_cli/test_gateway_linger.py
teyrebaz33 f10e26f731 fix: auto-enable systemd linger during gateway install on headless servers
Fixes #1005

Without linger, user-level systemd services stop when the SSH session
ends — even though systemctl --user status shows active (running).

Changes to systemd_install():
- Try loginctl enable-linger automatically (succeeds when the process
  has the required privileges)
- If loginctl fails (no privileges), print a clear, copy-pasteable
  warning with the exact command the user must run

New helper: _ensure_linger_enabled()
- Fast path: checks /var/lib/systemd/linger/<user> (no subprocess)
- Auto-enable: loginctl enable-linger <user>
- Fallback: actionable warning with sudo command + restart instructions

Tests: 4 new tests in TestEnsureLingerEnabled, 205 passed total
2026-03-14 11:46:59 -07:00

121 lines
4.9 KiB
Python

"""Tests for gateway linger auto-enable behavior on headless Linux installs."""
from types import SimpleNamespace
import hermes_cli.gateway as gateway
class TestEnsureLingerEnabled:
def test_linger_already_enabled_via_file(self, monkeypatch, capsys):
monkeypatch.setattr(gateway, "is_linux", lambda: True)
monkeypatch.setattr("getpass.getuser", lambda: "testuser")
monkeypatch.setattr(gateway, "Path", lambda _path: SimpleNamespace(exists=lambda: True))
calls = []
monkeypatch.setattr(gateway.subprocess, "run", lambda *args, **kwargs: calls.append((args, kwargs)))
gateway._ensure_linger_enabled()
out = capsys.readouterr().out
assert "Systemd linger is enabled" in out
assert calls == []
def test_status_enabled_skips_enable(self, monkeypatch, capsys):
monkeypatch.setattr(gateway, "is_linux", lambda: True)
monkeypatch.setattr("getpass.getuser", lambda: "testuser")
monkeypatch.setattr(gateway, "Path", lambda _path: SimpleNamespace(exists=lambda: False))
monkeypatch.setattr(gateway, "get_systemd_linger_status", lambda: (True, ""))
calls = []
monkeypatch.setattr(gateway.subprocess, "run", lambda *args, **kwargs: calls.append((args, kwargs)))
gateway._ensure_linger_enabled()
out = capsys.readouterr().out
assert "Systemd linger is enabled" in out
assert calls == []
def test_loginctl_success_enables_linger(self, monkeypatch, capsys):
monkeypatch.setattr(gateway, "is_linux", lambda: True)
monkeypatch.setattr("getpass.getuser", lambda: "testuser")
monkeypatch.setattr(gateway, "Path", lambda _path: SimpleNamespace(exists=lambda: False))
monkeypatch.setattr(gateway, "get_systemd_linger_status", lambda: (False, ""))
monkeypatch.setattr("shutil.which", lambda name: "/usr/bin/loginctl")
run_calls = []
def fake_run(cmd, capture_output=False, text=False, check=False):
run_calls.append((cmd, capture_output, text, check))
return SimpleNamespace(returncode=0, stdout="", stderr="")
monkeypatch.setattr(gateway.subprocess, "run", fake_run)
gateway._ensure_linger_enabled()
out = capsys.readouterr().out
assert "Enabling linger" in out
assert "Linger enabled" in out
assert run_calls == [(["loginctl", "enable-linger", "testuser"], True, True, False)]
def test_missing_loginctl_shows_manual_guidance(self, monkeypatch, capsys):
monkeypatch.setattr(gateway, "is_linux", lambda: True)
monkeypatch.setattr("getpass.getuser", lambda: "testuser")
monkeypatch.setattr(gateway, "Path", lambda _path: SimpleNamespace(exists=lambda: False))
monkeypatch.setattr(gateway, "get_systemd_linger_status", lambda: (None, "loginctl not found"))
monkeypatch.setattr("shutil.which", lambda name: None)
calls = []
monkeypatch.setattr(gateway.subprocess, "run", lambda *args, **kwargs: calls.append((args, kwargs)))
gateway._ensure_linger_enabled()
out = capsys.readouterr().out
assert "sudo loginctl enable-linger testuser" in out
assert "loginctl not found" in out
assert calls == []
def test_loginctl_failure_shows_manual_guidance(self, monkeypatch, capsys):
monkeypatch.setattr(gateway, "is_linux", lambda: True)
monkeypatch.setattr("getpass.getuser", lambda: "testuser")
monkeypatch.setattr(gateway, "Path", lambda _path: SimpleNamespace(exists=lambda: False))
monkeypatch.setattr(gateway, "get_systemd_linger_status", lambda: (False, ""))
monkeypatch.setattr("shutil.which", lambda name: "/usr/bin/loginctl")
monkeypatch.setattr(
gateway.subprocess,
"run",
lambda *args, **kwargs: SimpleNamespace(returncode=1, stdout="", stderr="Permission denied"),
)
gateway._ensure_linger_enabled()
out = capsys.readouterr().out
assert "sudo loginctl enable-linger testuser" in out
assert "Permission denied" in out
def test_systemd_install_calls_linger_helper(monkeypatch, tmp_path, capsys):
unit_path = tmp_path / "systemd" / "user" / "hermes-gateway.service"
monkeypatch.setattr(gateway, "get_systemd_unit_path", lambda: unit_path)
calls = []
def fake_run(cmd, check=False, **kwargs):
calls.append((cmd, check))
return SimpleNamespace(returncode=0, stdout="", stderr="")
helper_calls = []
monkeypatch.setattr(gateway.subprocess, "run", fake_run)
monkeypatch.setattr(gateway, "_ensure_linger_enabled", lambda: helper_calls.append(True))
gateway.systemd_install(force=False)
out = capsys.readouterr().out
assert unit_path.exists()
assert [cmd for cmd, _ in calls] == [
["systemctl", "--user", "daemon-reload"],
["systemctl", "--user", "enable", gateway.SERVICE_NAME],
]
assert helper_calls == [True]
assert "Service installed and enabled" in out