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SuperQ / smokeping_prober

Prometheus style smokeping
Apache License 2.0
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UDP configured but ICMP is used - version 0.7.1 #128

Closed Nachtfalkeaw closed 8 months ago

Nachtfalkeaw commented 8 months ago 
[Unit]
Description=Smokeping-Prober
After=network-online.target

[Service]
User=root
Group=root
Restart=always
ExecReload=/bin/kill -HUP $MAINPID
ExecStart=/opt/prometheus/smokeping_prober/smokeping_prober \
  --config.file=/opt/prometheus/smokeping_prober/smokeping.yml \
  --web.listen-address="192.168.10.51:9374" \
  --privileged \
  --log.level=info

[Install]
WantedBy=multi-user.target
root@ubiquiti:/opt/prometheus/smokeping_prober#
targets:
- hosts:
  - 192.168.10.1
  - 192.168.10.51
  - www.google.de
  interval: 0.5s # Duration, Default 1s.
  network: ip4 # One of ip, ip4, ip6. Default: ip (automatic IPv4/IPv6)
  protocol: icmp # One of icmp, udp. Default: icmp (Requires privileged operation)
  size: 64 # Packet data size in bytes. Default 56 (Range: 24 - 65535)
  source: 192.168.10.51 # Souce IP address to use. Default: None (automatic selection)

- hosts:
  - 192.168.10.50
  - 192.168.10.10
  - www.ard.de
  interval: 0.5s # Duration, Default 1s.
  network: ip4 # One of ip, ip4, ip6. Default: ip (automatic IPv4/IPv6)
  protocol: icmp # One of icmp, udp. Default: icmp (Requires privileged operation)
  size: 512 # Packet data size in bytes. Default 56 (Range: 24 - 65535)
  source: 192.168.10.51 # Souce IP address to use. Default: None (automatic selection)

- hosts:
  - 192.168.10.70
  - 192.168.10.21
  - 192.168.10.6
  interval: 0.5s # Duration, Default 1s.
  network: ip4 # One of ip, ip4, ip6. Default: ip (automatic IPv4/IPv6)
  protocol: udp # One of icmp, udp. Default: icmp (Requires privileged operation)
  size: 128 # Packet data size in bytes. Default 56 (Range: 24 - 65535)
  source: 192.168.10.51 # Souce IP address to use. Default: None (automatic selection)
root@xxx:/opt/prometheus/smokeping_prober# tcpdump -nnvi ens3 host 192.168.10.51 and host 192.168.10.70
tcpdump: listening on ens3, link-type EN10MB (Ethernet), snapshot length 262144 bytes
00:26:23.175564 IP (tos 0x0, ttl 64, id 46291, offset 0, flags [DF], proto ICMP (1), length 156)
    192.168.10.51 > 192.168.10.70: ICMP echo request, id 82, seq 911, length 136
00:26:23.674676 IP (tos 0x0, ttl 64, id 46406, offset 0, flags [DF], proto ICMP (1), length 156)
    192.168.10.51 > 192.168.10.70: ICMP echo request, id 82, seq 912, length 136
00:26:24.175418 IP (tos 0x0, ttl 64, id 46497, offset 0, flags [DF], proto ICMP (1), length 156)
    192.168.10.51 > 192.168.10.70: ICMP echo request, id 82, seq 913, length 136
00:26:24.675495 IP (tos 0x0, ttl 64, id 46618, offset 0, flags [DF], proto ICMP (1), length 156)
    192.168.10.51 > 192.168.10.70: ICMP echo request, id 82, seq 914, length 136
00:26:25.175441 IP (tos 0x0, ttl 64, id 46692, offset 0, flags [DF], proto ICMP (1), length 156)
    192.168.10.51 > 192.168.10.70: ICMP echo request, id 82, seq 915, length 136
00:26:25.674644 IP (tos 0x0, ttl 64, id 46796, offset 0, flags [DF], proto ICMP (1), length 156)
    192.168.10.51 > 192.168.10.70: ICMP echo request, id 82, seq 916, length 136
00:26:26.174764 IP (tos 0x0, ttl 64, id 46842, offset 0, flags [DF], proto ICMP (1), length 156)
    192.168.10.51 > 192.168.10.70: ICMP echo request, id 82, seq 917, length 136
00:26:26.675342 IP (tos 0x0, ttl 64, id 46852, offset 0, flags [DF], proto ICMP (1), length 156)
    192.168.10.51 > 192.168.10.70: ICMP echo request, id 82, seq 918, length 136
00:26:27.175188 IP (tos 0x0, ttl 64, id 46974, offset 0, flags [DF], proto ICMP (1), length 156)
    192.168.10.51 > 192.168.10.70: ICMP echo request, id 82, seq 919, length 136
00:26:27.675493 IP (tos 0x0, ttl 64, id 46977, offset 0, flags [DF], proto ICMP (1), length 156)
    192.168.10.51 > 192.168.10.70: ICMP echo request, id 82, seq 920, length 136
^C
10 packets captured
10 packets received by filter
0 packets dropped by kernel
root@xxx:/opt/prometheus/smokeping_prober#

from tcpdump I only see ICMP. the frequency matches the 0.5s and the "lenth" is 156 which more or less the 126 configured for UDP.

SuperQ commented 8 months ago

UDP is about what socket is used to make ICMP packets. Not actually sending UDP packets.