To avoid false ping alerts during snapshot backup

[RIDS_I2MP]

Hi Team,

We receive few tickets on daily basis during snapshot backup to avoid them is there any solution?

Thanks
Prashanth Chenna

[RIDS_I2MP]

Every day after business hours, vm snapshot backup tasks run. During the snapshot backup task one or two ping drops occur which creates auto tickets. As multiple servers are backed up, we receive multiple auto tickets.

[gsmith]

Hi

You can use Scheduled Downtime for the servers being backed up.

Please look at:
https://assets.nagios.com/downloads/nag ... s%20XI.pdf

to configure downtime.

Please let us know if you have any questions.

Thank you

[RIDS_I2MP]

Hi

We don't want to use schedule downtime it will not alert us if something goes wrong at that moment.

Thanks
Prashanth Chenna

[gsmith]

Hi

You can use the scheduled downtime for just the ping service on certain hosts.

Flexible downtime
• Intended for times when you know that a host or service is going to be down for X minutes (or hours), but
you don't know exactly when that event will start.
• When you schedule flexible downtime, Nagios XI will start the scheduled downtime sometime between
the start and end times you specified.
• The downtime will last for as long as the duration you specified when you scheduled the downtime.
• This assumes that the host or service for which you scheduled flexible downtime either goes down (or
becomes unreachable) or goes into a non-OK state sometime between the start and end times you
specified.
• The time at which a host or service transitions to a problem state determines the time at which Nagios XI
actually starts the downtime.
• The downtime will then last for the duration you specified, even if the host or service recovers before the
downtime expires.

Thanks

[RIDS_I2MP]

Hi Team,

How many times it ping in 1 min. how many packets it is sending ?

We have set check interval as 1 min. what is the criteria to send a alert as critical like if there is 1 or 2 ping drop then also will it send critical alert?

Can you let us know from where we can check ping logs?

Thanks
Prashanth Chenna

[gsmith]

Hi

The default host check is:

Code: Select all

/usr/local/nagios/libexec/check_icmp -H 127.0.0.1 -w 3000.0,80% -c 5000.0,100% -p 5

Here is the detail on the check_icmp command, as you can see it sends 5 packets (-p 5):

check_icmp v2.3.3 (nagios-plugins 2.3.3)
Copyright (c) 2005-2018 Nagios Plugin Development Team
<[email protected]>

Usage:
check_icmp [options] [-H] host1 host2 hostN

Options:
-h, --help
Print detailed help screen
-V, --version
Print version information
--extra-opts=[section][@file]
Read options from an ini file. See
https://www.nagios-plugins.org/doc/extra-opts.html
for usage and examples.
-w
warning threshold (currently 200.000ms,40%)
-c
critical threshold (currently 500.000ms,80%)
-R
RTA, round trip average, mode warning,critical, ex. 100ms,200ms unit in ms
-P
packet loss mode, ex. 40%,50% , unit in %
-J
jitter mode warning,critical, ex. 40.000ms,50.000ms , unit in ms
-M
MOS mode, between 0 and 4.4 warning,critical, ex. 3.5,3.0
-S
score mode, max value 100 warning,critical, ex. 80,70
-O
detect out of order ICMP packts
-4
target address(es) are IPv4 and packets are ICMPv4
-6
target address(es) are IPv6 and packets are ICMPv6
-H
specify a target
-s
specify a source IP address or device name
-n
number of packets to send (currently 5)
-p
number of packets to send (currently 5)
-i
max packet interval (currently 80.000ms)
-I
max target interval (currently 0.000ms)
-m
number of alive hosts required for success
-l
TTL on outgoing packets (currently 0)
-t
timeout value (seconds, currently 10)
-b
Number of icmp data bytes to send
Packet size will be data bytes + icmp header (currently 68 + 8)
-v
verbose

Notes:
If not mode R,P,J,M,S or O is informed, default icmp behavior, RTA and packet loss

The -H switch is optional. Naming a host (or several) to check is not.

When defining multiple addresses they must be provided as the last argument.

Threshold format for -w and -c is 200.25,60% for 200.25 msec RTA and 60%
packet loss. The default values should work well for most users.
You can specify different RTA factors using the standardized abbreviations
us (microseconds), ms (milliseconds, default) or just plain s for seconds.

The -v switch can be specified several times for increased verbosity.

Send email to [email protected] if you have questions regarding use
of this software. To submit patches or suggest improvements, send email to
[email protected]

Here is an example of a config that checks every minute, if it detects a failure it will check again every minute, after the third failed
check it will send out a notification.

Image032.jpg

There are no ping logs, but the Advanced tab from the Host Status Detail page may provide the information
you are looking for:

Image031.jpg

Please let me know if you need any more information.

Thanks