Package: munin-plugins-core Version: 2.0.33-1 Severity: minor Hi, it seems that if you can't resolve hostnames when munin-node starts, the SNMP-based plugins will be assigned to the local host name instead of the node name one expects.
More details: - zaphod.casa.mia: munin-node and dns server (I discovered the issue at boot time, but you can reproduce it stopping the DNS server or removing entries from /etc/hosts) - c877-cs-1.casa.mia: the device we want to monitor via snmp - /etc/munin/munin.conf stanzas: [zaphod.casa.mia] address 127.0.0.1 use_node_name yes [c877-cs-1.casa.mia] address 127.0.0.1 use_node_name no Steps to reproduce: 1. telnet localhost 4949 1a. list zaphod.casa.mia -> check that no snmp_* entries are shown 1b. list c877-cs-1.casa.mia -> check that the usual snmp_* entries are shown 2. stop the dns and/or remove the entry from /etc/hosts 3. start munin-node 4. telnet localhost 4949 4a. list zaphod.casa.mia -> snmp_c877-cs-1.casa.mia_* appear 4b. list c877-cs-1.casa.mia -> only snmp_c877-cs-1.casa.mia_uptime is shown (sometimes something else) In /var/log/munin/munin-node.log is then seen (just one for clarity): 2017/10/14-12:25:33 [707] Error output from snmp_c877-cs-1.casa.mia_if_2: 2017/10/14-12:25:33 [707] Could not set up SNMP 2 session to c877-cs-1.casa.mia: Unable to resolve the UDP/IPv4 address "c877-cs-1.casa.mia" 2017/10/14-12:25:33 [707] Service 'snmp_c877-cs-1.casa.mia_if_2' exited with status 11/0. /etc/munin/plugins/snmp_c877-cs-1.casa.mia_if_2 is a symlink to /usr/share/munin/plugins/snmp__if_ Seeing the above log I'm not sure if this report should be assigned to munin-node or if it's something in Munin::Plugin::SNMP. Thanks for maintaining munin, Riccardo -- System Information: Debian Release: 9.2 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 4.9.0-4-amd64 (SMP w/2 CPU cores) Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8), LANGUAGE=it_IT.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages munin-plugins-core depends on: ii munin-common 2.0.33-1 ii perl 5.24.1-3+deb9u2 Versions of packages munin-plugins-core recommends: ii libnet-snmp-perl 6.0.1-2 Versions of packages munin-plugins-core suggests: pn conntrack <none> pn libcache-cache-perl <none> pn libdbd-mysql-perl <none> pn libnet-dns-perl <none> pn libnet-netmask-perl <none> pn libnet-telnet-perl <none> pn libxml-parser-perl <none> ii python 2.7.13-2 ii ruby 1:2.3.3 -- no debconf information