systemd-exporter missing metrics from accounting

[kanistra121]

On the target VM I have enabled a systemd-exporter via docker and nginx as reverse proxy. So far I am getting my metrics into Grafana.

  systemd-exporter:
    image: prometheuscommunity/systemd-exporter:main
    container_name: "systemd-exporter"
    command:
    #- '--systemd.collector.unit-include=".+"'
    #- '--systemd.collector.unit-exclude=".+"'
    - '--systemd.collector.enable-restart-count'
    - '--systemd.collector.enable-ip-accounting'
    - '--log.level=info'
    pid: host
    restart: unless-stopped
    volumes:
      #- /proc:/host/proc:ro
      #- /sys:/host/sys:ro
      - /var/run/dbus/system_bus_socket:/var/run/dbus/system_bus_socket:ro
    networks:
      - monitoring  

I see that the systemd configs are enabled as expected. With systemd-analyze cat-config /etc/systemd/system.conf I see that config and drop-ins are correct. Also make sure to systemctl daemon-reload and restart exporters.

# /etc/systemd/system.conf.d/monitoring-overrides.conf
# Enable accounting for testing monitoring /root/monitoring
[Manager]
DefaultCPUAccounting=true
DefaultMemoryAccounting=true
DefaultIOAccounting=true
DefaultIPAccounting=true
DefaultTasksAccounting=true

I double checked that these are enabled per service.

systemctl show --property=CPUAccounting ssh.service
systemctl show --property=MemoryAccounting ssh.service
systemctl show --property=IOAccounting ssh.service
systemctl show --property=IPAccounting ssh.service
systemctl show --property=TasksAccounting ssh.service

Still when I using this dashboard,
some metrics are not present in visualizations like CPU Usage or Memory Usage.

sum by(name) (irate(systemd_unit_cpu_seconds_total{instance="$instance",name=~"$name"}[$__rate_interval]))
sum by(name) (systemd_unit_memory_bytes{instance="$instance",name=~"$name"})

These series are not even active when I curl my target. With this approach I successfully enabled IPAccounting, though.
In total I see 3601 series when queried with count({instance="example.com:9558"})

systemd_exporter_build_info{branch="main",goarch="amd64",goos="linux",goversion="go1.24.10",revision="a4e850d12e819b332900f9d3fc5cb77582f6d2c6",tags="unknown",version="0.7.0"} 1

cat /etc/os-release

PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"