get_services() read list-unit-files' second column, which since systemd 245
is followed by a preset column -- "enabled enabled" never equalled
"enabled", so every service on every node was reported disabled (#6).
manage_service() ended in "|| true" and returned success whatever happened.
Both now come from napalm-device-types' SystemdServicesMixin (2.2.0): the
enabled state is UnitFileState from systemctl show, MainPID comes along in
the same round trip, and an action reports systemctl's exit status. The
driver keeps only _run_service_command(), its exec path as root. The exit
status marker keeps the output non-empty, so _exec_ssh_command's SSH fallback
on an empty API answer can no longer run an action twice.
The listing no longer includes templates, static unit files and aliases that
are not loaded (on a PVE 9 node: 280 entries -> 172).
Closes#6
Christian Manivong
6bf1736619