Package: munin Version: 2.999.7-2 Severity: important Dear Maintainer,
After installation, munin-httpd does not display any graph: requests are sent to munin-httpd, which returns zero-length files. Apparently, the problem is that munin-httpd talks to rrdcached over the /run/munin/flush.sock socket (because it is passed as the RRDCACHED_ADDRESS env variable). But that socket is restricted to the FLUSH command using rrdcached's -P option, while it receives a FETCH command. So, it just replies with a 'permission denied' error (as can be seen in strace). The problem can be worked-around by changing "-P FLUSH" to "-P FETCH,FLUSH" in munin.service. But I'm not sure that's the correct solution. Lucas -- Package-specific info: =========================== Munin support information ========================== This is support information for Munin version 2.999.7 Munin Master ============ Configuration items from /etc/munin/munin.conf Directories ----------- dbdir /var/lib/munin logdir /var/log/munin rundir /var/run/munin tmpldir /etc/munin/templates Processes --------- fork 1 max_cgi_graph_jobs (unset) max_graph_jobs (unset) max_processes 16 TLS --- tls disabled tls_ca_certificate /etc/munin/cacert.pem tls_certificate /etc/munin/munin.pem tls_match (unset) tls_private_key /etc/munin/munin.pem tls_verify_certificate (unset) tls_verify_depth 5 Munin Node ========== Configuration items from /etc/munin/munin-node.conf Network ------- host * port 4949 Privileges ---------- user root group root Process ------- background 1 pid_file /run/munin-node.pid setsid 1 Logging ------- log_level 4 log_file Sys::Syslog -- System Information: Debian Release: buster/sid APT prefers testing APT policy: (900, 'testing'), (800, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 4.16.0-2-amd64 (SMP w/2 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages munin depends on: ii adduser 3.117 ii cron [cron-daemon] 3.0pl1-130 ii fonts-dejavu-core 2.37-1 ii libdbd-sqlite3-perl 1.58-1 ii libfile-copy-recursive-perl 0.44-1 ii libhtml-template-perl 2.97-1 ii libhtml-template-pro-perl 0.9510-1+b6 ii libhttp-server-simple-cgi-prefork-perl 6-1 ii libhttp-server-simple-perl 0.52-1 ii libio-socket-inet6-perl 2.72-2 ii libio-string-perl 1.08-3 ii liblist-moreutils-perl 0.416-1+b3 ii libmunin-master-perl 2.999.7-2 ii libparallel-forkmanager-perl 1.19-1 ii librrds-perl 1.7.0-1+b1 ii liburi-perl 1.74-1 ii libxml-dumper-perl 0.81-1.2 ii lsb-base 9.20170808 ii munin-common 2.999.7-2 ii perl 5.26.2-5 ii rrdcached 1.7.0-1+b1 ii rrdtool 1.7.0-1+b1 ii systemd-sysv 238-5 Versions of packages munin recommends: ii munin-doc 2.999.7-2 ii munin-node 2.999.7-2 Versions of packages munin suggests: pn www-browser <none> Versions of packages munin-common depends on: ii perl 5.26.2-5 Versions of packages munin-node depends on: ii adduser 3.117 ii libmunin-node-perl 2.999.7-2 ii libnet-server-perl 2.009-1 ii munin-common 2.999.7-2 ii perl 5.26.2-5 Versions of packages munin-node recommends: ii munin-plugins-core 2.999.7-2 Versions of packages munin-node suggests: pn munin-plugins-extra <none> pn munin-plugins-http <none> pn munin-plugins-java <none> pn munin-plugins-pgsql <none> pn munin-plugins-snmp <none> -- no debconf information