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Optionally turn off disk's enclosure slot if an I/O is hung triggering the deadman. It's possible for outstanding I/O to a misbehaving SCSI disk to neither promptly complete or return an error. This can occur due to retry and recovery actions taken by the SCSI layer, driver, or disk. When it occurs the pool will be unresponsive even though there may be sufficient redundancy configured to proceeded without this single disk. When a hung I/O is detected by the kmods it will be posted as a deadman event. By default an I/O is considered to be hung after 5 minutes. This value can be changed with the zfs_deadman_ziotime_ms module parameter. If ZED_POWER_OFF_ENCLOSURE_SLOT_ON_DEADMAN is set the disk's enclosure slot will be powered off causing the outstanding I/O to fail. The ZED will then handle this like a normal disk failure. By default ZED_POWER_OFF_ENCLOSURE_SLOT_ON_DEADMAN is not set. As part of this change `zfs_deadman_events_per_second` is added to control the ratelimitting of deadman events independantly of delay events. In practice, a single deadman event is sufficient and more aren't particularly useful. Alphabetize the zfs_deadman_* entries in zfs.4. Reviewed-by: Tony Hutter <hutter2@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #16226
200 lines
6.0 KiB
Plaintext
200 lines
6.0 KiB
Plaintext
##
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# zed.rc – ZEDLET configuration.
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##
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# shellcheck disable=SC2034
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##
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# Absolute path to the debug output file.
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#
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#ZED_DEBUG_LOG="/tmp/zed.debug.log"
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##
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# Email address of the zpool administrator for receipt of notifications;
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# multiple addresses can be specified if they are delimited by whitespace.
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# Email will only be sent if ZED_EMAIL_ADDR is defined.
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# Enabled by default; comment to disable.
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#
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ZED_EMAIL_ADDR="root"
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##
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# Name or path of executable responsible for sending notifications via email;
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# the mail program must be capable of reading a message body from stdin.
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# Email will only be sent if ZED_EMAIL_ADDR is defined.
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#
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#ZED_EMAIL_PROG="mail"
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##
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# Command-line options for ZED_EMAIL_PROG.
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# The string @ADDRESS@ will be replaced with the recipient email address(es).
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# The string @SUBJECT@ will be replaced with the notification subject;
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# this should be protected with quotes to prevent word-splitting.
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# Email will only be sent if ZED_EMAIL_ADDR is defined.
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# If @SUBJECT@ was omited here, a "Subject: ..." header will be added to notification
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#
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#ZED_EMAIL_OPTS="-s '@SUBJECT@' @ADDRESS@"
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##
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# Default directory for zed lock files.
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#
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#ZED_LOCKDIR="/var/lock"
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##
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# Minimum number of seconds between notifications for a similar event.
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#
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#ZED_NOTIFY_INTERVAL_SECS=3600
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##
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# Notification verbosity.
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# If set to 0, suppress notification if the pool is healthy.
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# If set to 1, send notification regardless of pool health.
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#
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#ZED_NOTIFY_VERBOSE=0
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##
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# Send notifications for 'ereport.fs.zfs.data' events.
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# Disabled by default, any non-empty value will enable the feature.
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#
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#ZED_NOTIFY_DATA=
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##
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# Pushbullet access token.
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# This grants full access to your account -- protect it accordingly!
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# <https://www.pushbullet.com/get-started>
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# <https://www.pushbullet.com/account>
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# Disabled by default; uncomment to enable.
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#
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#ZED_PUSHBULLET_ACCESS_TOKEN=""
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##
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# Pushbullet channel tag for push notification feeds that can be subscribed to.
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# <https://www.pushbullet.com/my-channel>
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# If not defined, push notifications will instead be sent to all devices
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# associated with the account specified by the access token.
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# Disabled by default; uncomment to enable.
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#
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#ZED_PUSHBULLET_CHANNEL_TAG=""
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##
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# Slack Webhook URL.
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# This allows posting to the given channel and includes an access token.
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# <https://api.slack.com/incoming-webhooks>
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# Disabled by default; uncomment to enable.
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#
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#ZED_SLACK_WEBHOOK_URL=""
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##
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# Pushover token.
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# This defines the application from which the notification will be sent.
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# <https://pushover.net/api#registration>
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# Disabled by default; uncomment to enable.
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# ZED_PUSHOVER_USER, below, must also be configured.
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#
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#ZED_PUSHOVER_TOKEN=""
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##
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# Pushover user key.
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# This defines which user or group will receive Pushover notifications.
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# <https://pushover.net/api#identifiers>
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# Disabled by default; uncomment to enable.
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# ZED_PUSHOVER_TOKEN, above, must also be configured.
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#ZED_PUSHOVER_USER=""
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##
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# Default directory for zed state files.
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#
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#ZED_RUNDIR="/var/run"
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##
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# Turn on/off enclosure LEDs when drives get DEGRADED/FAULTED. This works for
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# device mapper and multipath devices as well. This works with JBOD enclosures
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# and NVMe PCI drives (assuming they're supported by Linux in sysfs).
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#
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ZED_USE_ENCLOSURE_LEDS=1
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##
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# Run a scrub after every resilver
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# Disabled by default, 1 to enable and 0 to disable.
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#ZED_SCRUB_AFTER_RESILVER=0
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##
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# The syslog priority (e.g., specified as a "facility.level" pair).
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#
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#ZED_SYSLOG_PRIORITY="daemon.notice"
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##
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# The syslog tag for marking zed events.
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#
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#ZED_SYSLOG_TAG="zed"
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##
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# Which set of event subclasses to log
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# By default, events from all subclasses are logged.
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# If ZED_SYSLOG_SUBCLASS_INCLUDE is set, only subclasses
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# matching the pattern are logged. Use the pipe symbol (|)
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# or shell wildcards (*, ?) to match multiple subclasses.
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# Otherwise, if ZED_SYSLOG_SUBCLASS_EXCLUDE is set, the
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# matching subclasses are excluded from logging.
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#ZED_SYSLOG_SUBCLASS_INCLUDE="checksum|scrub_*|vdev.*"
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ZED_SYSLOG_SUBCLASS_EXCLUDE="history_event"
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##
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# Use GUIDs instead of names when logging pool and vdevs
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# Disabled by default, 1 to enable and 0 to disable.
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#ZED_SYSLOG_DISPLAY_GUIDS=1
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##
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# Power off the drive's slot in the enclosure if it becomes FAULTED. This can
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# help silence misbehaving drives. This assumes your drive enclosure fully
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# supports slot power control via sysfs.
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#ZED_POWER_OFF_ENCLOSURE_SLOT_ON_FAULT=1
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##
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# Power off the drive's slot in the enclosure if there is a hung I/O which
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# exceeds the deadman timeout. This can help prevent a single misbehaving
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# drive from rendering a redundant pool unavailable. This assumes your drive
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# enclosure fully supports slot power control via sysfs.
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#ZED_POWER_OFF_ENCLOSURE_SLOT_ON_DEADMAN=1
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##
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# Ntfy topic
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# This defines which topic will receive the ntfy notification.
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# <https://docs.ntfy.sh/publish/>
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# Disabled by default; uncomment to enable.
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#ZED_NTFY_TOPIC=""
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##
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# Ntfy access token (optional for public topics)
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# This defines an access token which can be used
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# to allow you to authenticate when sending to topics
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# <https://docs.ntfy.sh/publish/#access-tokens>
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# Disabled by default; uncomment to enable.
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#ZED_NTFY_ACCESS_TOKEN=""
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##
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# Ntfy Service URL
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# This defines which service the ntfy call will be directed toward
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# <https://docs.ntfy.sh/install/>
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# https://ntfy.sh by default; uncomment to enable an alternative service url.
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#ZED_NTFY_URL="https://ntfy.sh"
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##
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# Gotify server URL
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# This defines a URL that the Gotify call will be directed toward.
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# <https://gotify.net/docs/index>
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# Disabled by default; uncomment to enable.
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#ZED_GOTIFY_URL=""
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##
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# Gotify application token
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# This defines a Gotify application token which a message is associated with.
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# This token is generated when an application is created on the Gotify server.
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# Disabled by default; uncomment to enable.
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#ZED_GOTIFY_APPTOKEN=""
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##
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# Gotify priority (optional)
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# If defined, this overrides the default priority of the
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# Gotify application associated with ZED_GOTIFY_APPTOKEN.
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# Value is an integer 0 and up.
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#ZED_GOTIFY_PRIORITY=""
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