napalm-device-types' SystemdServicesMixin (2.2.0) now provides get_services()
and manage_service(); this driver supplies only the transport (#7):
- _run_service_command(): unprivileged reads and root logins run as they
are -- the user is asked once per session with "id -u", so a root login on a
box without sudo is not prefixed with one. With a sudo password the command
goes through _sudo(); without one through "sudo -n", which fails at once
instead of hanging the session on a password prompt until the read timeout.
- get_services(): one round trip instead of an is-enabled and a show per unit
(6.0 s -> 0.8 s on a 184-unit Ubuntu host). A host without systemd still
falls back to "service --status-all".
- manage_service(): when sudo wants a password netOrk does not have, the
failure says how to fix it -- the same hint the apt and SNMP actions give,
now one constant (_SUDO_PASSWORD_HINT) instead of two copies.
OpenMediaVault and QNAP inherit this driver. OMV gets service control with
it; QNAP opts out (napalm-qnap-qts), since QTS has no systemd.
README: the sudo option is sudo_password, not secret; manage_service and the
systemctl permissions are listed.
Closes#7
Christian Manivong