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bcd9624d0f
When the ZED_EMAIL_INTERVAL_SECS="3600" option is set in zed.rc configuration file then notification emails should be rate limited. Rate limiting is accomplished by maintaining a colon delimited state file which includes the device name. Unfortunately there are valid device names which include a colon and therefore prevent the rate limiting for working properly. For this reason the delimiter has been changed to a semi-colon. Signed-off-by: louwrentius <louwrentius@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Chris Dunlap <cdunlap@llnl.gov> Closes #2645
82 lines
2.3 KiB
Bash
Executable File
82 lines
2.3 KiB
Bash
Executable File
#!/bin/sh
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#
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# Send email to ZED_EMAIL in response to a DATA zevent.
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# Only one message per ZED_EMAIL_INTERVAL_SECS will be sent for a given
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# class/pool combination. This protects against spamming the recipient
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# should multiple events occur together in time for the same pool.
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# Exit codes:
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# 0: email sent
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# 1: email failed
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# 2: email suppressed
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# 3: missing executable
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# 4: unsupported event class
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# 5: internal error
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# State File Format:
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# POOL;TIME_OF_LAST_EMAIL
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#
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test -f "${ZED_SCRIPT_DIR}/zed.rc" && . "${ZED_SCRIPT_DIR}/zed.rc"
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test -n "${ZEVENT_POOL}" || exit 5
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test -n "${ZEVENT_SUBCLASS}" || exit 5
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if test "${ZEVENT_SUBCLASS}" != "data"; then \
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logger -t "${ZED_SYSLOG_TAG:=zed}" \
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-p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \
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`basename "$0"`: unsupported event class \"${ZEVENT_SUBCLASS}\"
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exit 4
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fi
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# Only send email if ZED_EMAIL has been configured.
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test -n "${ZED_EMAIL}" || exit 2
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# Ensure requisite executables are installed.
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if ! command -v "${MAIL:=mail}" >/dev/null 2>&1; then
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logger -t "${ZED_SYSLOG_TAG:=zed}" \
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-p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \
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`basename "$0"`: "${MAIL}" not installed
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exit 3
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fi
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NAME="zed.${ZEVENT_SUBCLASS}.email"
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LOCKFILE="${ZED_LOCKDIR:=/var/lock}/${NAME}.lock"
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STATEFILE="${ZED_RUNDIR:=/var/run}/${NAME}.state"
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# Obtain lock to ensure mutual exclusion for accessing state.
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exec 8> "${LOCKFILE}"
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flock -x 8
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# Query state for last time email was sent for this pool.
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TIME_NOW=`date +%s`
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TIME_LAST=`egrep "^${ZEVENT_POOL};" "${STATEFILE}" 2>/dev/null | cut -d ";" -f2`
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if test -n "${TIME_LAST}"; then
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TIME_DELTA=`expr "${TIME_NOW}" - "${TIME_LAST}"`
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if test "${TIME_DELTA}" -lt "${ZED_EMAIL_INTERVAL_SECS:=3600}"; then
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exit 2
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fi
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fi
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"${MAIL}" -s "ZFS ${ZEVENT_SUBCLASS} error for ${ZEVENT_POOL} on `hostname`" \
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"${ZED_EMAIL}" <<EOF
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A ZFS ${ZEVENT_SUBCLASS} error has been detected:
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eid: ${ZEVENT_EID}
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host: `hostname`
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time: ${ZEVENT_TIME_STRING}
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pool: ${ZEVENT_POOL}
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EOF
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MAIL_STATUS=$?
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# Update state.
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egrep -v "^${ZEVENT_POOL};" "${STATEFILE}" 2>/dev/null > "${STATEFILE}.$$"
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echo "${ZEVENT_POOL};${TIME_NOW}" >> "${STATEFILE}.$$"
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mv -f "${STATEFILE}.$$" "${STATEFILE}"
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if test "${MAIL_STATUS}" -ne 0; then
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logger -t "${ZED_SYSLOG_TAG:=zed}" \
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-p "${ZED_SYSLOG_PRIORITY:=daemon.warning}" \
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`basename "$0"`: "${MAIL}" exit="${MAIL_STATUS}"
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exit 1
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fi
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exit 0
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