68 lines
3.5 KiB
SYSTEMD
68 lines
3.5 KiB
SYSTEMD
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[Unit]
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Description=Network UPS Tools - device driver for %I
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After=local-fs.target
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# Note: If the "Before" line below is uncommented, the target unit
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# would only become initialized after the driver units are all in
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# a final state (active, failed, ...) and would allow nut-server
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# (upsd) to start up and represent those devices on the network.
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# With this constraint commented away, the nut-server should start
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# earlier, but may initially report some devices as Not connected
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# (they should appear when drivers complete their initialization -
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# e.g. snmp walks of large MIBs can take a while):
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#Before=nut-driver.target
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# Propagate stopping of the target:
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PartOf=nut-driver.target
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# Note: The choice of "network.target" allows to schedule this unit
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# roughly when the network stack of this OS is ready (e.g. that the
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# subsequent `upsd` will have a `0.0.0.0` or a `localhost` to bind
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# to); however this target does not ensure availability of a real
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# connection or final IP addresses. Drivers that require network as
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# a media for interaction with UPSes (snmp-ups, netxml-ups, ipmi etc.)
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# may want to extend this unit with `Requires=network-online.target`
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# instead. Also note that *generally* this should not be a problem,
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# since the drivers have a few retries with timeouts during startup,
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# and typically by the time the box gets an IP address, the driver
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# is still retrying to start and will succeed.
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# Extending the unit does not require *this* file to be edited, you
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# can instead drop in an additional piece of configuration, e.g. add
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# a `/etc/systemd/system/nut-driver@.service.d/network.conf` with:
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# [Unit]
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# Requires=network-online.target
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# After=network-online.target
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# If your `upsd` requires specific IP addresses to be available before
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# starting, a `/etc/systemd/system/nut-driver.target.d/network.conf`
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# can be used in a similar manner.
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# Finally note that "nut-driver-enumerator.service" should take care of this.
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[Service]
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EnvironmentFile=-@CONFPATH@/nut.conf
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SyslogIdentifier=%N
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ExecStart=/bin/sh -c 'NUTDEV="`@NUT_LIBEXECDIR@/nut-driver-enumerator.sh --get-device-for-service %i`" && [ -n "$NUTDEV" ] || { echo "FATAL: Could not find a NUT device section for service unit %i" >&2 ; exit 1 ; } ; @SBINDIR@/upsdrvctl start "$NUTDEV"'
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ExecStop=/bin/sh -c 'NUTDEV="`@NUT_LIBEXECDIR@/nut-driver-enumerator.sh --get-device-for-service %i`" && [ -n "$NUTDEV" ] || { echo "FATAL: Could not find a NUT device section for service unit %i" >&2 ; exit 1 ; } ; @SBINDIR@/upsdrvctl stop "$NUTDEV"'
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# Restart really always, do not stop trying:
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StartLimitInterval=0
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Restart=always
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# Protract the "hold-off" interval, so if the device connection is
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# lost, the driver does not reapidly restart and fail too many times,
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# and then systemd would keep the unit failed without further retries.
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# Notably, this helps start "dummy-ups" drivers retranslating local
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# devices (so getting a chicken-and-egg problem for driver-upsd-driver
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# orderly series of initializations). More details in NUT issue #779.
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RestartSec=15s
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Type=forking
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# Note: If you customize the "maxstartdelay" in ups.conf or in your
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# NUT compilation defaults, so it exceeds the default systemd unit
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# startup timeout (typically 90 sec), then make sure to set a slightly
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# longer systemd timeout for the nut-driver unit instances. You can
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# do this by populating a drop-in configuration, so it is not later
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# overwritten by updates to your NUT package -- create a dir+file:
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# /etc/systemd/system/nut-driver@.service.d/timeout.conf with lines:
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# [Service]
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# TimeoutStartSec=190s
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[Install]
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WantedBy=nut-driver.target
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