This is happening with calls to both send_nsca and send_nrdp.php.
I can send one passive alert from a remote host and it works fine.
Any other sends in the next two minutes will time out.
After two minutes a send will succeed again, but then another two minutes must pass before another send will work.
This seems to affect messages from any remote hosts. Once a passive alert is processed from one host, no other remote hosts can send alerts for two minutes.
I know I have a lot more investigating to do on my own, including upgrading core from a 4.0 version, but I was wondering if anyone had seen this before and could provide some direction for diagnosis.
One potential source of the problem is that the monitoring server is running on a VM which is using IP tables on the hypervisor to forward messages on either port 5667 for NSCA or 80 for NRDP.
Does this symptom sound familiar to anyone?.
Passive checks work once then timeout for the next 2 minutes
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Re: Passive checks work once then timeout for the next 2 min
Do you see errors...anywhere? It's pretty much the end of our work day, so any errors we'll take a look at tomorrow, but you should take a look at https://support.nagios.com/kb/article.php?id=480 to give you an idea of some places where you might see some errors (and a potential fix).
Re: Passive checks work once then timeout for the next 2 min
No errors. The first alert shows up in the correct logs, but subsequent alerts don't show up anywhere for 2 minutes. It is possible that the nagios monitor on the VM doesn't see alerts in a two minute window following a successful alert. I will run some packet captures to confirm or refute that theory. But if that is the case, I have no idea what would cause that behavior so my only question at this point is if anyone has encountered this anomaly and if so, what was done to address it.
Re: Passive checks work once then timeout for the next 2 min
Do you see the data show up in the check results folder on the Nagios server from the remote servers during the 2 minutes when nothing is displayed in the GUI?
Can you post your nagios.cfg file so we can view it's settings?
Also, run the following command as root in the Nagios server and post the output.
Thanks
Can you post your nagios.cfg file so we can view it's settings?
Also, run the following command as root in the Nagios server and post the output.
Code: Select all
ps -ef --cols=300
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Re: Passive checks work once then timeout for the next 2 min
I ran a tcpdump and for nsca nothing gets through to port 5667 during the two-minute window. So I am assuming this is some networking and/or/ vm issue.
But to answer your questions, nothing shows up in the check logs during the dead two minutes.
Here is my nagios.cfg:
and ps output
But to answer your questions, nothing shows up in the check logs during the dead two minutes.
Here is my nagios.cfg:
Code: Select all
[nagios@xxxxxxxxx oc_objects]$ cat ~/etc/nagios.cfg | grep -v '^#\|^$'
log_file=/var/log/nagios/nagios.log
cfg_file=/usr/local/nagios/etc/objects/oc_objects/commands.cfg
cfg_file=/usr/local/nagios/etc/objects/oc_objects/notify_commands.cfg
cfg_file=/usr/local/nagios/etc/objects/oc_objects/contacts.cfg
cfg_file=/usr/local/nagios/etc/objects/oc_objects/timeperiods.cfg
cfg_file=/usr/local/nagios/etc/objects/oc_objects/host-templates.cfg
cfg_file=/usr/local/nagios/etc/objects/oc_objects/oc_servicegroups.cfg
cfg_file=/usr/local/nagios/etc/objects/oc_objects/oc_hostgroups.cfg
cfg_file=/usr/local/nagios/etc/objects/oc_objects/oc_commands.cfg
cfg_file=/usr/local/nagios/etc/objects/oc_objects/localhost.cfg
cfg_file=/usr/local/nagios/etc/objects/oc_objects/production-exceptions.cfg
cfg_file=/usr/local/nagios/etc/objects/BAS-OC-hosts_ss.cfg
cfg_file=/usr/local/nagios/etc/objects/CH2-nOC-hosts_ss.cfg
cfg_file=/usr/local/nagios/etc/objects/CH2-OC-hosts_ss.cfg
cfg_file=/usr/local/nagios/etc/objects/DC3-nOC-hosts_ss.cfg
cfg_file=/usr/local/nagios/etc/objects/DC3-OC-hosts_ss.cfg
cfg_file=/usr/local/nagios/etc/objects/FR2-OC-hosts_ss.cfg
cfg_file=/usr/local/nagios/etc/objects/INTX-OC-hosts_ss.cfg
cfg_file=/usr/local/nagios/etc/objects/NULL-host-hosts_ss.cfg
cfg_file=/usr/local/nagios/etc/objects/NY4-OC-hosts_ss.cfg
cfg_file=/usr/local/nagios/etc/objects/oc_objects/oc_services.cfg
cfg_file=/usr/local/nagios/etc/objects/STATIC-HOSTS/hypervisors.cfg
cfg_file=/usr/local/nagios/etc/objects/STATIC-HOSTS/internal-servs.cfg
cfg_file=/usr/local/nagios/etc/objects/STATIC-HOSTS/windoze-servs.cfg
cfg_file=/usr/local/nagios/etc/objects/STATIC-HOSTS/lanes-VMs.cfg
cfg_file=/usr/local/nagios/etc/objects/STATIC-HOSTS/other-VMs.cfg
object_cache_file=/usr/local/nagios/var/objects.cache
precached_object_file=/usr/local/nagios/var/objects.precache
resource_file=/usr/local/nagios/etc/resource.cfg
status_file=/usr/local/nagios/var/status.dat
status_update_interval=10
nagios_user=nagios
nagios_group=nagios
check_external_commands=1
command_file=/usr/local/nagios/var/rw/nagios.cmd
lock_file=/usr/local/nagios/var/nagios.lock
temp_file=/usr/local/nagios/var/nagios.tmp
temp_path=/tmp
event_broker_options=0
log_rotation_method=d
log_archive_path=/usr/local/nagios/var/archives
use_syslog=1
log_notifications=1
log_service_retries=1
log_host_retries=1
log_event_handlers=1
log_initial_states=0
log_current_states=1
log_external_commands=1
log_passive_checks=1
service_inter_check_delay_method=s
max_service_check_spread=30
service_interleave_factor=s
host_inter_check_delay_method=s
max_host_check_spread=30
max_concurrent_checks=0
check_result_reaper_frequency=10
max_check_result_reaper_time=30
check_result_path=/usr/local/nagios/var/spool/checkresults
max_check_result_file_age=3600
cached_host_check_horizon=15
cached_service_check_horizon=15
enable_predictive_host_dependency_checks=1
enable_predictive_service_dependency_checks=1
soft_state_dependencies=0
auto_reschedule_checks=0
auto_rescheduling_interval=30
auto_rescheduling_window=180
service_check_timeout=60
host_check_timeout=30
event_handler_timeout=30
notification_timeout=30
ocsp_timeout=5
perfdata_timeout=5
retain_state_information=1
state_retention_file=/usr/local/nagios/var/retention.dat
retention_update_interval=60
use_retained_program_state=1
use_retained_scheduling_info=1
retained_host_attribute_mask=0
retained_service_attribute_mask=0
retained_process_host_attribute_mask=0
retained_process_service_attribute_mask=0
retained_contact_host_attribute_mask=0
retained_contact_service_attribute_mask=0
interval_length=60
check_for_updates=1
bare_update_check=0
use_aggressive_host_checking=0
execute_service_checks=1
accept_passive_service_checks=1
execute_host_checks=1
accept_passive_host_checks=1
enable_notifications=1
enable_event_handlers=1
process_performance_data=0
obsess_over_services=0
obsess_over_hosts=0
translate_passive_host_checks=0
passive_host_checks_are_soft=0
check_for_orphaned_services=1
check_for_orphaned_hosts=1
check_service_freshness=1
service_freshness_check_interval=60
service_check_timeout_state=c
check_host_freshness=0
host_freshness_check_interval=60
additional_freshness_latency=15
enable_flap_detection=1
low_service_flap_threshold=5.0
high_service_flap_threshold=20.0
low_host_flap_threshold=5.0
high_host_flap_threshold=20.0
date_format=us
illegal_object_name_chars=`~!$%^&*|'"<>?,()=
illegal_macro_output_chars=`~$&|'"<>
use_regexp_matching=0
use_true_regexp_matching=0
admin_email=nagios@localhost
admin_pager=pagenagios@localhost
daemon_dumps_core=0
use_large_installation_tweaks=0
enable_environment_macros=0
debug_level=280
debug_verbosity=2
debug_file=/usr/local/nagios/var/nagios.debug
max_debug_file_size=1000000
allow_empty_hostgroup_assignment=0
Code: Select all
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 2016 ? 00:02:03 /sbin/init
root 2 0 0 2016 ? 00:00:01 [kthreadd]
root 3 2 0 2016 ? 02:51:19 [migration/0]
root 4 2 0 2016 ? 00:02:49 [ksoftirqd/0]
root 5 2 0 2016 ? 00:00:00 [migration/0]
root 6 2 0 2016 ? 00:01:15 [watchdog/0]
root 7 2 0 2016 ? 02:41:18 [migration/1]
root 8 2 0 2016 ? 00:00:00 [migration/1]
root 9 2 0 2016 ? 00:03:23 [ksoftirqd/1]
root 10 2 0 2016 ? 00:01:10 [watchdog/1]
root 11 2 0 2016 ? 03:02:07 [migration/2]
root 12 2 0 2016 ? 00:00:00 [migration/2]
root 13 2 0 2016 ? 00:05:12 [ksoftirqd/2]
root 14 2 0 2016 ? 00:01:15 [watchdog/2]
root 15 2 0 2016 ? 01:39:51 [migration/3]
root 16 2 0 2016 ? 00:00:00 [migration/3]
root 17 2 0 2016 ? 00:02:41 [ksoftirqd/3]
root 18 2 0 2016 ? 00:01:07 [watchdog/3]
root 19 2 0 2016 ? 01:39:00 [migration/4]
root 20 2 0 2016 ? 00:00:00 [migration/4]
root 21 2 0 2016 ? 00:02:23 [ksoftirqd/4]
root 22 2 0 2016 ? 00:01:04 [watchdog/4]
root 23 2 0 2016 ? 01:30:46 [migration/5]
root 24 2 0 2016 ? 00:00:00 [migration/5]
root 25 2 0 2016 ? 00:02:15 [ksoftirqd/5]
root 26 2 0 2016 ? 00:01:03 [watchdog/5]
root 27 2 0 2016 ? 00:57:43 [events/0]
root 28 2 0 2016 ? 00:47:11 [events/1]
root 29 2 0 2016 ? 00:57:47 [events/2]
root 30 2 0 2016 ? 00:43:16 [events/3]
root 31 2 0 2016 ? 01:00:25 [events/4]
root 32 2 0 2016 ? 01:01:14 [events/5]
root 33 2 0 2016 ? 00:00:00 [cgroup]
root 34 2 0 2016 ? 00:00:00 [khelper]
root 35 2 0 2016 ? 00:00:00 [netns]
root 36 2 0 2016 ? 00:00:00 [async/mgr]
root 37 2 0 2016 ? 00:00:00 [pm]
root 38 2 0 2016 ? 00:03:21 [sync_supers]
root 39 2 0 2016 ? 00:03:36 [bdi-default]
root 40 2 0 2016 ? 00:00:00 [kintegrityd/0]
root 41 2 0 2016 ? 00:00:00 [kintegrityd/1]
root 42 2 0 2016 ? 00:00:00 [kintegrityd/2]
root 43 2 0 2016 ? 00:00:00 [kintegrityd/3]
root 44 2 0 2016 ? 00:00:00 [kintegrityd/4]
root 45 2 0 2016 ? 00:00:00 [kintegrityd/5]
root 46 2 0 2016 ? 00:45:36 [kblockd/0]
root 47 2 0 2016 ? 00:00:13 [kblockd/1]
root 48 2 0 2016 ? 00:00:09 [kblockd/2]
root 49 2 0 2016 ? 00:00:06 [kblockd/3]
root 50 2 0 2016 ? 00:00:04 [kblockd/4]
root 51 2 0 2016 ? 00:00:04 [kblockd/5]
root 52 2 0 2016 ? 00:00:00 [kacpid]
root 53 2 0 2016 ? 00:00:00 [kacpi_notify]
root 54 2 0 2016 ? 00:00:00 [kacpi_hotplug]
root 55 2 0 2016 ? 00:00:00 [ata_aux]
root 56 2 0 2016 ? 00:00:00 [ata_sff/0]
root 57 2 0 2016 ? 00:00:00 [ata_sff/1]
root 58 2 0 2016 ? 00:00:00 [ata_sff/2]
root 59 2 0 2016 ? 00:00:00 [ata_sff/3]
root 60 2 0 2016 ? 00:00:00 [ata_sff/4]
root 61 2 0 2016 ? 00:00:00 [ata_sff/5]
root 62 2 0 2016 ? 00:00:00 [ksuspend_usbd]
root 63 2 0 2016 ? 00:00:00 [khubd]
root 64 2 0 2016 ? 00:00:00 [kseriod]
root 65 2 0 2016 ? 00:00:00 [md/0]
root 66 2 0 2016 ? 00:00:00 [md/1]
root 67 2 0 2016 ? 00:00:00 [md/2]
root 68 2 0 2016 ? 00:00:00 [md/3]
root 69 2 0 2016 ? 00:00:00 [md/4]
root 70 2 0 2016 ? 00:00:00 [md/5]
root 71 2 0 2016 ? 00:00:00 [md_misc/0]
root 72 2 0 2016 ? 00:00:00 [md_misc/1]
root 73 2 0 2016 ? 00:00:00 [md_misc/2]
root 74 2 0 2016 ? 00:00:00 [md_misc/3]
root 75 2 0 2016 ? 00:00:00 [md_misc/4]
root 76 2 0 2016 ? 00:00:00 [md_misc/5]
root 77 2 0 2016 ? 00:00:00 [linkwatch]
root 78 2 0 2016 ? 00:00:20 [khungtaskd]
root 79 2 0 2016 ? 00:00:43 [kswapd0]
root 80 2 0 2016 ? 00:00:00 [ksmd]
root 81 2 0 2016 ? 00:04:52 [khugepaged]
root 82 2 0 2016 ? 00:00:00 [aio/0]
root 83 2 0 2016 ? 00:00:00 [aio/1]
root 84 2 0 2016 ? 00:00:00 [aio/2]
root 85 2 0 2016 ? 00:00:00 [aio/3]
root 86 2 0 2016 ? 00:00:00 [aio/4]
root 87 2 0 2016 ? 00:00:00 [aio/5]
root 88 2 0 2016 ? 00:00:00 [crypto/0]
root 89 2 0 2016 ? 00:00:00 [crypto/1]
root 90 2 0 2016 ? 00:00:00 [crypto/2]
root 91 2 0 2016 ? 00:00:00 [crypto/3]
root 92 2 0 2016 ? 00:00:00 [crypto/4]
root 93 2 0 2016 ? 00:00:00 [crypto/5]
root 98 2 0 2016 ? 00:00:00 [kthrotld/0]
root 99 2 0 2016 ? 00:00:00 [kthrotld/1]
root 100 2 0 2016 ? 00:00:00 [kthrotld/2]
root 101 2 0 2016 ? 00:00:00 [kthrotld/3]
root 102 2 0 2016 ? 00:00:00 [kthrotld/4]
root 103 2 0 2016 ? 00:00:00 [kthrotld/5]
root 105 2 0 2016 ? 00:00:00 [kpsmoused]
root 106 2 0 2016 ? 00:00:00 [usbhid_resumer]
root 136 2 0 2016 ? 00:00:00 [kstriped]
root 312 2 0 2016 ? 00:00:00 [scsi_eh_0]
root 313 2 0 2016 ? 00:00:00 [scsi_eh_1]
root 345 2 0 2016 ? 00:00:00 [virtio-blk]
root 361 2 0 2016 ? 01:42:36 [jbd2/vda2-8]
root 362 2 0 2016 ? 00:00:00 [ext4-dio-unwrit]
root 453 1 0 2016 ? 00:00:00 /sbin/udevd -d
root 667 2 0 2016 ? 00:00:00 [virtio-net]
root 669 2 0 2016 ? 00:00:00 [vballoon]
root 908 453 0 2016 ? 00:00:00 /sbin/udevd -d
apache 920 6242 0 12:18 ? 00:00:01 /usr/sbin/httpd
root 940 2 0 2016 ? 00:00:00 [jbd2/vda1-8]
root 941 2 0 2016 ? 00:00:00 [ext4-dio-unwrit]
root 984 2 0 2016 ? 00:02:16 [kauditd]
root 1081 2 0 2016 ? 00:45:58 [flush-252:0]
root 1160 1 0 2016 ? 00:05:18 auditd
root 1178 1 0 2016 ? 00:00:00 /sbin/portreserve
root 1185 1 0 2016 ? 01:11:14 /sbin/rsyslogd -i /var/run/syslogd.pid -c 5
root 1214 1 0 2016 ? 00:51:06 irqbalance --pid=/var/run/irqbalance.pid
rpc 1228 1 0 2016 ? 00:00:58 rpcbind
rpcuser 1246 1 0 2016 ? 00:00:00 rpc.statd
dbus 1375 1 0 2016 ? 00:00:02 dbus-daemon --system
root 1404 1 0 2016 ? 00:00:00 /usr/sbin/acpid
68 1414 1 0 2016 ? 00:03:19 hald
root 1415 1414 0 2016 ? 00:00:00 hald-runner
root 1444 1415 0 2016 ? 00:00:00 hald-addon-input: Listening on /dev/input/event2 /dev/input/event0
68 1458 1415 0 2016 ? 00:00:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.socket
root 1471 453 0 2016 ? 00:00:00 /sbin/udevd -d
root 1477 1 0 2016 ? 00:36:31 automount --pid-file /var/run/autofs.pid
root 1497 1 0 2016 ? 00:03:33 /usr/sbin/sshd
root 1532 1 0 2016 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --socket=/var/lib/mysql/mysql.sock --pid-file=/var/run/mysqld/mysqld.pid --basedir=/usr --user=mysql
mysql 1634 1532 0 2016 ? 03:38:59 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock
root 1726 1 0 2016 ? 01:21:21 /usr/libexec/postfix/master
postfix 1735 1726 0 2016 ? 02:15:13 qmgr -l -t fifo -u
postfix 1748 1726 0 16:41 ? 00:00:00 pickup -l -t fifo -u
root 1750 1 0 2016 ? 00:04:56 crond
root 1761 1 0 2016 ? 00:00:00 /usr/sbin/atd
root 1808 1 0 2016 ? 00:00:00 /opt/dell/srvadmin/sbin/dsm_om_connsvcd -run
root 1809 1808 0 2016 ? 17:02:14 /opt/dell/srvadmin/sbin/dsm_om_connsvcd -run
root 1882 1 0 2016 tty2 00:00:00 /sbin/mingetty /dev/tty2
root 1884 1 0 2016 tty3 00:00:00 /sbin/mingetty /dev/tty3
root 1886 1 0 2016 tty4 00:00:00 /sbin/mingetty /dev/tty4
root 1888 1 0 2016 tty5 00:00:00 /sbin/mingetty /dev/tty5
root 1890 1 0 2016 tty6 00:00:00 /sbin/mingetty /dev/tty6
root 2284 1497 0 14:40 ? 00:00:00 sshd: root@pts/0
root 2398 2284 0 14:40 pts/0 00:00:00 -bash
root 2439 2398 0 14:40 pts/0 00:00:00 su - nagios
nagios 2440 2439 0 14:40 pts/0 00:00:00 -bash
postfix 2753 1726 0 16:42 ? 00:00:00 bounce -z -n defer -t unix -u
postfix 3359 1726 0 16:43 ? 00:00:00 error -n retry -t unix -u
apache 4255 6242 0 12:21 ? 00:00:01 /usr/sbin/httpd
nagios 4319 1 0 2017 ? 00:00:00 /usr/local/nagios/bin/nsca -c /usr/local/nagios/etc/nsca.cfg
postfix 5305 1726 0 16:44 ? 00:00:00 cleanup -z -t unix -u
postfix 5804 1726 0 16:45 ? 00:00:00 error -n retry -t unix -u
postfix 5805 1726 0 16:45 ? 00:00:00 error -n retry -t unix -u
postfix 5806 1726 0 16:45 ? 00:00:00 bounce -z -n defer -t unix -u
postfix 5807 1726 0 16:45 ? 00:00:00 error -n retry -t unix -u
postfix 5808 1726 0 16:45 ? 00:00:00 error -n retry -t unix -u
postfix 5809 1726 0 16:45 ? 00:00:00 bounce -z -n defer -t unix -u
postfix 5810 1726 0 16:45 ? 00:00:00 error -n retry -t unix -u
postfix 5811 1726 0 16:45 ? 00:00:00 bounce -z -n defer -t unix -u
postfix 5812 1726 0 16:45 ? 00:00:00 error -n retry -t unix -u
postfix 5813 1726 0 16:45 ? 00:00:00 bounce -z -n defer -t unix -u
postfix 5815 1726 0 16:45 ? 00:00:00 bounce -z -n defer -t unix -u
postfix 5816 1726 0 16:45 ? 00:00:00 error -n retry -t unix -u
postfix 5819 1726 0 16:45 ? 00:00:00 bounce -z -n defer -t unix -u
root 6040 2 0 Jan02 ? 00:00:00 [bluetooth]
root 6242 1 0 2016 ? 00:20:04 /usr/sbin/httpd
apache 6251 6242 0 Jan10 ? 00:00:05 /usr/sbin/httpd
apache 6257 6242 0 Jan10 ? 00:00:05 /usr/sbin/httpd
apache 6258 6242 0 Jan10 ? 00:00:04 /usr/sbin/httpd
nagios 6841 26464 0 16:46 ? 00:00:00 /usr/local/nagios/libexec/check_ping -H 10.102.3.75 -w 3000.0,80% -c 5000.0,100% -p 5
nagios 6842 6841 0 16:46 ? 00:00:00 /bin/ping -n -U -w 30 -c 5 10.102.3.75
nagios 6854 26461 0 16:46 ? 00:00:00 /usr/local/nagios/libexec/check_ping -H 10.54.205.61 -w 100.0,20% -c 500.0,60% -p 5
nagios 6855 6854 0 16:46 ? 00:00:00 /bin/ping -n -U -w 10 -c 5 10.54.205.61
nagios 6857 26468 0 16:46 ? 00:00:00 /usr/local/nagios/libexec/check_ping -H 10.54.170.61 -w 100.0,20% -c 500.0,60% -p 5
nagios 6858 6857 0 16:46 ? 00:00:00 /bin/ping -n -U -w 10 -c 5 10.54.170.61
nagios 6861 2440 1 16:46 pts/0 00:00:00 ps -ef --cols=300
ntp 11603 1 0 2016 ? 00:00:53 ntpd -u ntp:ntp -p /var/run/ntpd.pid -g
apache 12479 6242 0 Jan09 ? 00:00:11 /usr/sbin/httpd
root 15186 2 0 2016 ? 00:00:08 [rpciod/0]
root 15187 2 0 2016 ? 00:00:00 [rpciod/1]
root 15188 2 0 2016 ? 00:23:24 [rpciod/2]
root 15189 2 0 2016 ? 00:00:01 [rpciod/3]
root 15190 2 0 2016 ? 00:00:00 [rpciod/4]
root 15191 2 0 2016 ? 00:00:00 [rpciod/5]
root 15194 2 0 2016 ? 00:00:00 [kslowd000]
root 15195 2 0 2016 ? 00:00:00 [kslowd001]
root 15196 2 0 2016 ? 00:05:58 [nfsiod]
root 16723 2 0 2016 ? 00:00:00 [nfsv4.0-svc]
apache 22925 6242 0 14:58 ? 00:00:00 /usr/sbin/httpd
apache 22931 6242 0 14:58 ? 00:00:00 /usr/sbin/httpd
apache 22932 6242 0 14:58 ? 00:00:00 /usr/sbin/httpd
root 24946 1 0 2016 ? 00:00:00 /usr/sbin/console-kit-daemon --no-daemon
nagios 26458 1 1 16:01 ? 00:00:47 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg
nagios 26460 26458 0 16:01 ? 00:00:03 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
nagios 26461 26458 0 16:01 ? 00:00:02 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
nagios 26462 26458 0 16:01 ? 00:00:02 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
nagios 26463 26458 0 16:01 ? 00:00:03 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
nagios 26464 26458 0 16:01 ? 00:00:03 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
nagios 26465 26458 0 16:01 ? 00:00:03 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
nagios 26466 26458 0 16:01 ? 00:00:03 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
nagios 26467 26458 0 16:01 ? 00:00:03 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
nagios 26468 26458 0 16:01 ? 00:00:02 /usr/local/nagios/bin/nagios --worker /usr/local/nagios/var/rw/nagios.qh
nagios 26469 26458 0 16:01 ? 00:00:00 /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg
root 26617 1 0 2016 tty1 00:00:00 /sbin/mingetty /dev/tty1
apache 32603 6242 0 12:17 ? 00:00:01 /usr/sbin/httpd
Re: Passive checks work once then timeout for the next 2 min
Was the tcpdump taken on the Core side or client side? If Core, try running it on the client side to see if it's making any attempt to connect to Core or if you see anything else that's odd.
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Re: Passive checks work once then timeout for the next 2 min
Captures wre taken on both the core side and the hypervisor between the core and the client. During the two minute "radio silence" the hypervisor sees traffic but the Core VM does not.
Re: Passive checks work once then timeout for the next 2 min
I'd agree then that this appears to be a networking issue. Hopefully the networking team will be able to help track down these missing packets.
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