/metrics does not provide content

[nachogrxdev]

To give you context, I have this docker compose that contains unbound, adguard and wireguard. In another docker compose I have all the services related to monitoring, prometheus, grafana, loki and others.

version: "3.9"

networks:
  traefik_network:
    external: true
  private_network:
    ipam:
      driver: default
      config:
        - subnet: 10.2.0.0/24

services:
  unbound:
    image: "mvance/unbound:latest"
    restart: unless-stopped
    hostname: "unbound"
    volumes:
      - "${PWD}/unbound:/opt/unbound/etc/unbound/"
    networks:
      private_network:
        ipv4_address: 10.2.0.200

  wireguard:
    depends_on: [unbound, adguard]
    image: linuxserver/wireguard
    container_name: wireguard
    cap_add:
      - NET_ADMIN
      - SYS_MODULE
    environment:
      - PUID=${PUID}
      - PGID=${PGID}
      - TZ=${TZ}
      - SERVERPORT=51820
      - SERVERURL=${SERVERURL}
      - PEERS=${PEERS}
      - PEERDNS=10.2.0.100
      - INTERNAL_SUBNET=10.6.0.0
    volumes:
      - "${PWD}/wireguard:/config"
      - "/lib/modules:/lib/modules"
    sysctls:
      - net.ipv4.conf.all.src_valid_mark=1
    restart: unless-stopped
    labels:
      - "traefik.enable=true"
      - "traefik.udp.routers.wireguard.entrypoints=wireguard"
      - "traefik.udp.routers.wireguard.service=wireguard"
      - "traefik.udp.services.wireguard.loadbalancer.server.port=51820"
      - "traefik.docker.network=traefik_network"
    ports:
      - "51820:51820/udp"
    networks:
      traefik_network:
      private_network:
        ipv4_address: 10.2.0.3

  prometheus-wireguard-exporter:
    depends_on: [wireguard]
    network_mode: host
    hostname: wg_metrics
    restart: unless-stopped
    command: -a true -v true -n /etc/wireguard/wg0.conf
    image: mindflavor/prometheus-wireguard-exporter
    volumes:
      - "${PWD}/wireguard/wg_confs/wg0.conf:/etc/wireguard/wg0.conf:ro"
    cap_add:
      - NET_ADMIN

  adguard:
    depends_on: [unbound]
    image: adguard/adguardhome
    restart: unless-stopped
    hostname: adguard
    volumes:
      - "${PWD}/adguard/opt-adguard-work:/opt/adguardhome/work"
      - "${PWD}/adguard/opt-adguard-conf:/opt/adguardhome/conf"
    networks:
      private_network:
        ipv4_address: 10.2.0.100

When I call the metrics endpoint I get this:

curl localhost:9586/metrics
# HELP wireguard_sent_bytes_total Bytes sent to the peer
# TYPE wireguard_sent_bytes_total counter

# HELP wireguard_received_bytes_total Bytes received from the peer
# TYPE wireguard_received_bytes_total counter

# HELP wireguard_latest_handshake_seconds UNIX timestamp seconds of the last handshake
# TYPE wireguard_latest_handshake_seconds gauge

But when I run the wg show all dump command in the wireguard container it correctly shows the peer information.

wg0     HIDDEN    HIDDEN    51820   off
wg0     HIDDEN    HIDDEN    (none)  10.6.0.2/32     0       0       0       off
wg0     HIDDEN    HIDDEN    (none)  10.6.0.3/32     0       0       0       off
wg0     HIDDEN    HIDDEN    (none)  10.6.0.4/32     0       0       0       off
wg0     HIDDEN    HIDDEN    HIDDEN_IP:51820      10.6.0.5/32 1698008848      6724    68012   off

Any idea what may be happening?

[orzaez]

the same thing happens to me, i dont understando why shows just 3 types of metrics...

[JeroenW-priv]

Samething here. " wg show all dump" shows the needed info in the WG container. The wireguard exporter show the peer info being read (verbose mode) but no metrics are displayed.
Verbose output:
[2023-11-16T19:40:13Z TRACE prometheus_wireguard_exporter] wg show all dump stdout ==
[2023-11-16T19:40:13Z TRACE prometheus_wireguard_exporter] wg show all dump stderr ==
[2023-11-16T19:40:13Z DEBUG prometheus_wireguard_exporter::wireguard] WireGuard::try_from() called
[2023-11-16T19:40:13Z TRACE prometheus_wireguard_exporter::wireguard] WireGuard { interfaces: {} }
[2023-11-16T19:40:13Z DEBUG prometheus_wireguard_exporter::wireguard] WireGuard::render_with_names(self == WireGuard { interfaces: {} }, pehm == Some({"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=": PeerEntry { public_key: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=", allowed_ips: "10.252.1.1/32", friendly_description: None }, "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=": PeerEntry { public_key: "fxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", allowed_ips: "10.252.1.2/32", friendly_description: None }}), options == Options { verbose: true, prepend_sudo: false, separate_allowed_ips: false, extract_names_config_files: Some(["/wireguard/config/wg0.conf"]), interfaces: None, export_remote_ip_and_port: false, export_latest_handshake_delay: false } called

[GeoffreyCoulaud]

Same setup and issue here

[satangua]

Hello, someone find a solution ?

[bc185174]

It'll be prepend_sudo: false. Found that without -a true no metrics are produced. #86