Public bug reported: Hi everyone,
on Ubuntu ``` $ lsb_release -rd No LSB modules are available. Description: Ubuntu 24.04.2 LTS Release: 24.04 ```, I am using the package prometheus-blackbox-exporter, version 0.24.0-2ubuntu0.3 , and in particular its icmp prober-module to monitor a couple other machines with ICMP ping probes. Out of the box, the exporter packaged in this particular version of Ubuntu cannot send ICMP pings. I did not find useful errors being logged, the monitiored hosts are being reported as down by the exporter's `probe_success` metric (value 0 while it should be 1), and no outgoing ICMP packets can be observed through tcpdump (one should be sent everytime the monitoring system queries the blackbox exporter - multiple times per minute in my case). The cause is apparently a missing permission for low-level socket IO. Since the systemd unit runs the exporter as user `prometheus', which does not have elevated privileges, additional privileges, like e.g. the capability NET_RAW, would be required. Adding CAP_NET_RAW to the executable with the following command: ``` setcap cap_net_raw+ep /usr/bin/prometheus-blackbox-exporter ``` fixes the issue (until the next package upgrade). This might be related to https://bugs.launchpad.net/charm-prometheus- blackbox-exporter/+bug/1852398 on the exporter's (now obsolete IIUC) Juju charm (which provides more background with the exporter's documentation in https://bugs.launchpad.net/charm-prometheus-blackbox- exporter/+bug/1852398/comments/1). It would be great if this could be fixed; if I can provide any help, let me know. ** Affects: prometheus-blackbox-exporter (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2118605 Title: icmp probes do not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/prometheus-blackbox-exporter/+bug/2118605/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
