1.0.0-rc0: Systemd version detection not working

[paulfantom]

Systemd detection on standard Fedora 30 system doesn't work and possibly prevents some collectors from working correctly.

Systemd reports:

$ systemctl --version
systemd 241 (v241-14.git18dd3fb.fc30)
+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-hierarchy=hybrid

Host operating system: output of uname -a

Linux nas.ankhmorpork 5.5.9-100.fc30.x86_64 #1 SMP Thu Mar 12 14:15:32 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

node_exporter version: output of node_exporter --version

node_exporter, version 1.0.0-rc.0 (branch: HEAD, revision: ef7c05816adcb0e8923defe34e97f6afcce0a939)
  build user:       root@b38a2df1a38b
  build date:       20200220-12:54:05
  go version:       go1.13.8

node_exporter command line flags

    --collector.textfile \
    --collector.textfile.directory=/var/lib/node_exporter \
    --collector.filesystem \
    --collector.filesystem.ignored-fs-types=^(sys|proc|auto)fs$ \
    --collector.filesystem.ignored-mount-points=^/(sys|proc|dev|mnt/data|mnt/parity)($|/) \
    --collector.diskstats \
    --collector.diskstats.ignored-devices=^(dm-.*)$ \
    --collector.netdev \
    --collector.netdev.ignored-devices=^(veth.*|br.*)$ \
    --collector.systemd \
    --collector.systemd.enable-restarts-metrics \
    --no-collector.logind \
    --no-collector.ntp \
    --web.listen-address=0.0.0.0:9100

Are you running node_exporter in Docker?

no

What did you do that produced an error?

started a service

What did you expect to see?

no problems with systemd detection

What did you see instead?

Mar 23 11:50:42 nas.ankhmorpork node_exporter[5413]: level=warn ts=2020-03-23T10:50:42.884Z caller=systemd_linux.go:475 collector=systemd msg="Got invalid systemd version" version=v241-14.git18dd3fb.fc30
Mar 23 11:50:42 nas.ankhmorpork node_exporter[5413]: level=warn ts=2020-03-23T10:50:42.884Z caller=systemd_linux.go:126 collector=systemd msg="Detected systemd version is lower than minimum" current=0 minimum=212

[paulfantom]

From release notes of systemd 241:

The version string shown by systemd and other tools now includes the git commit hash when built from git. An override may be specified during compilation, which is intended to be used by distributions to include the package release information.

[wiljay]

Hi Paulfantom,

I also encounter this problem, So,wait prometheus fix is issue?