selfhost-utils/healthcheck/healthcheck.cfg.example

# The DEFAULT section contains the global configuration applied to all checks.
# You can re-define this variables in a check to override the global one.
[DEFAULT]

#### EMAIL NOTIFICATIONS ####

# Notify this email address(es) in case of alarm, multiple addresses separated by commas
# Comment this if you don't want email to be sent (maybe because using ALARM_COMMAND below)
MAILTO=root@localhost, user@localhost

# Sender address
#MAILFROM=root@localhost

# Use a remote SMTP host (enable by removing comment)
#SMTPHOST=my.smtp.host:465

# SMTP credentials
#SMTPUSER=mysmtpuser
#SMTPPASS=mysmtppass

# Use SSL for SMTP
#SMTPSSL=True


#### RUN COMMAND IN CASE OF ALARM ####
# You can run a command or script when an alert is issued.
#
# In this example, `curl` is used to send a POST request to Ntfy (https://ntfy.sh/), a service
# that delivers push notifications to smartphones and desktop computers.
# If you want to use ntfy, just change the topic name with something unique (see documentation
# at https://ntfy.sh/docs/ ), uncomment the ALARM_COMMAND entry and you are ready to go.
# If you generate a lot of traffic, please consider hosting your own ntfy server.
#
# Otherwise, you can replace the curl command with anything you want, you can use the following
# placeholders to pass your command/script the details about the event:
# %%CHECKNAME%% The name of the check (the one between square brackets in this config)
# %%HOSTNAME%% The host name
# %%DATETIME%% The date and time of the event, in human readable format
# %%ERROR%% An human readable error description (the same used in the mail alert)

#ALARM_COMMAND=curl -H "%%CHECKNAME%% alarm on %%HOSTNAME%%" -d "%%ERROR%% on %%DATETIME%%" ntfy.sh/my-unique-topic-name


#### NOTIFICATION POLICY ###
# Defines when to send the email and/or execute ALARM_COMMAND. Useful to avoid email flooding.
# Possible values:
# EVERY_RUN In case of alarm, sends a mail every time the script is run
# START Sends a mail only when an alarm starts
# ONCE_IN_MINUTES In case of alarm, resends a mail only if NOTIFY_MINUTES has passed
NOTIFY=EVERY_RUN

# Used only if NOTIFY=ONCE_IN_MINUTES. A mail is sent only if NOTIFY_MINUTES has passed from the previous one
NOTIFY_MINUTES=60

# Sends a mail when the alarm has ended
NOTIFY_ALARM_END=TRUE


#### HEALTH CHECKS ####
# Every health check is based on a command being executed, its result being parsed with a regexp
# to extract (as a single group) the numeric or string value, and the value being compared with
# a configured value. This checks are ready to be used, just enable the ones you need.
#
# CUSTOM CHECKS:
# You can add your own custom check declaring another section like this:
#
# [my_custom_check_name]
# DISABLED=False
# ALARM_STRING_EQUAL=Lorem ipsum
# ALARM_STRING_NOT_EQUAL=The lazy fox
# ALARM_VALUE_EQUAL=99
# ALARM_VALUE_NOT_EQUAL=76.365338
# ALARM_VALUE_MORE_THAN=1.0
# ALARM_VALUE_LESS_THAN=12
# COMMAND=/my/custom/binary --with parameters
# REGEXP=my regex to parse (awesome|disappointing) command output
#
# First test your custom command executing it in the command line
# Take the text output and write a regex to match it. Check every case:
# success result, error result, command failure. Then paste the command
# and regex in this config, enable the check and run to verify is working.


[system_load_1min]
# The system load average in the last minute
DISABLED=False
ALARM_VALUE_MORE_THAN=1.0
COMMAND=uptime
REGEXP=.*load average: (\d+[,.]\d+), \d+[,.]\d+, \d+[,.]\d+


[system_load_5min]
# The system load average in the last 5 minutes
DISABLED=False
ALARM_VALUE_MORE_THAN=1.0
COMMAND=uptime
REGEXP=.*load average: \d+[,.]\d+, (\d+[,.]\d+), \d+[,.]\d+


[system_load_15min]
# The system load average in the last 15 minutes
DISABLED=False
ALARM_VALUE_MORE_THAN=1.0
COMMAND=uptime
REGEXP=.*load average: \d+[,.]\d+, \d+[,.]\d+, (\d+[,.]\d+)


[used_disk_space]
# Used disk space (in percent, i.e. ALARM_VALUE_MORE_THAN=75 -> alarm if disk is more than 75% full)
DISABLED=True
ALARM_VALUE_MORE_THAN=75
COMMAND=df -h /dev/sda1
REGEXP=(\d{1,3})%


[raid_status]
# Issues an alarm when the raid is corrupted
# Checks this part of the /proc/mdstat file:
#       243553280 blocks super 1.2 [2/2] [UU]
# If the content of the last [ ] contains only U (without _), the raid array is healty
# Otherwise, [U_] or [_U] is displayed (may contain more U or _ if the array is more disks)
DISABLED=True
ALARM_STRING_NOT_EQUAL=UU
COMMAND=cat /proc/mdstat
REGEXP=.*\] \[([U_]+)\]\n


[battery_level]
# Issues an alarm when battery is discharging below a certain level (long blackout, pulled power cord...)
# For laptops used as servers, apparently common among the self hosters. Requires acpi package installed.
# Value is in %
DISABLED=True
COMMAND=acpi -b
REGEXP=Battery \d: .*, (\d{1,3})%
ALARM_VALUE_LESS_THAN=90


[laptop_charger_disconnected]
# Issues an alarm when laptop charger is disconnected
# For laptops used as servers, apparently common among the self hosters. Requires acpi package installed.
DISABLED=True
COMMAND=acpi -a
REGEXP=Adapter \d: (.+)
ALARM_STRING_EQUAL=off-line


[available_ram]
# Shows available ram in %.
DISABLED=False
COMMAND=free | grep Mem | awk '{print int($7/$2 * 100.0)}'
ALARM_VALUE_LESS_THAN=20


[cpu_temperature]
# CPU Temperature alarm: requires lm-sensors installed and configured (check your distribution's guide)
# The regexp must be adapted to your configuration: run `sensors` in the command line
# to find the name of the temperature sensor in your system. In this case is `Core 0`,
# but may be called Tdie or a lot of different names, there is no standard.
DISABLED=True
ALARM_VALUE_MORE_THAN=80
COMMAND=sensors
REGEXP=Core 0: +\+?(-?\d{1,3}).\d°[CF]


[fan_speed]
# Fan speed alarm: requires lm-sensors installed and configured (check your distribution's guide)
# The regexp must be adapted to your configuration: run `sensors` in the command line
# to find the name of the fan speed sensor in your system.
DISABLED=True
ALARM_VALUE_LESS_THAN=300
COMMAND=sensors
REGEXP=cpu_fan: +(\d+) RPM


[host_reachability]
# Check if a remote host is alive with Ping. You can replace the ip with a domain name (e.g. COMMAND=ping debian.org -c 1)
#
# Shows another approach: uses the return value to print a string. Leverages ping's ability to return different error codes:
# 0 = success
# 1 = the host is unreachable
# 2 = an error has occurred (and will be logged to stderr)
# We are throwing away stdout and replacing it with a custom text.
# If there is a different text (the stderr), something bad happened, and it will be reported in the mail.
DISABLED=True
ALARM_STRING_NOT_EQUAL=Online
COMMAND=ping 192.168.1.123 -c 1 > /dev/null && echo "Online" || echo "Offline"


[service_webserver]
# Check if a webserver is running on port 80. You can replace the ip with a domain name.
# You can check different services changing the port number. Some examples:
# 80 HTTP Webserver
# 443 HTTPS Webserver
# 21 FTP
# 22 SSH
# 5900 VNC (Linux remote desktop)
# 3389 RDP (Windows remote desktop)
DISABLED=True
ALARM_STRING_NOT_EQUAL=Online
COMMAND=nc -z -w 3 192.168.1.123 80 > /dev/null && echo "Online" || echo "Offline"


[dummy_always_alarm]
# A dummy check that is always in alarm. Useful for testing notifications.
DISABLED=True
ALARM_STRING_EQUAL=Core meltdown!
COMMAND=echo "Core meltdown!"


[security_updates_available]
# Checks for security updates via apt (works on Debian and derivatives, like Ubuntu).
# Needs the repositories to be updated with `apt update`, but is an heavy command, so it may
# be configured to be executed daily in a command in the same cron of healthcheck.
# E.g.: place this string in /etc/cron.d/healthcheck, before the healthcheck command:
# 	1 1 * * *       root    apt update
DISABLED=True
ALARM_STRING_EQUAL=security updates available
REGEXP=(security updates available|NO security updates available)
COMMAND=apt list --upgradable 2>/dev/null | grep -e "-security" && echo "security updates available" || echo "NO security updates available"
NOTIFY=START


[ups_power]
# Raises an alarm when UPS runs on battery.
# Requires NUT installed and configured on the system
# See complete documentation and support lists: https://networkupstools.org
# See simple start-up guide for Debian: https://wiki.debian.org/nut
# This config is for usbhid-ups driver. If you use a different driver, you may need
# to change the REGEXP to fit your output.
DISABLED=True
ALARM_STRING_NOT_EQUAL=OL
COMMAND=upsc eaton1600 2> /dev/null
REGEXP=^ups\.status: (OL|OB)$
NOTIFY=START

[ups_battery]
# Raises an alarm when UPS battery is discharged below 50%.
# Requires NUT installed and configured on the system
# See complete documentation and support lists: https://networkupstools.org
# See simple start-up guide for Debian: https://wiki.debian.org/nut
# This config is for usbhid-ups driver. If you use a different driver, you may need
# to change the REGEXP to fit your output.
DISABLED=True
ALARM_VALUE_LESS_THAN=50
COMMAND=upsc eaton1600 2> /dev/null
REGEXP=^battery\.charge: (\d{1,3})$
NOTIFY=ONCE_IN_MINUTES
NOTIFY_MINUTES=15