Probes¶
Each probe targets one class of system and turns its state into typed metrics and log streams. Enable the probes you need — they share the same naming and tagging conventions across every output sink.
CPU
Free
Per-mode utilization, per-core breakdown, load average
Memory
Free
Physical memory, swap, Windows paging rates
Network
Free
Per-interface throughput, packet and error rates
Logical Disk
Free
Filesystem capacity, inode usage
Linux Logs
Free
Systemd journal subscription → OTLP logs
Windows Event Log
Free
Event Log channels with level/EventID filtering
Process Monitor
Free
Per-process CPU, memory, threads, file descriptors
Systemd Units
Free
Active/sub/load state and restart counter per unit
Windows Services
Free
Service running/stopped state via SCM
Chrony (NTP)
Free
NTP sync health: offset, frequency, skew, stratum
S.M.A.R.T. Disk Health
Free
SATA/SAS and NVMe drive health via smartctl
IPMI / BMC Sensors
Free
Temperatures, fan speeds, voltages from BMC
NVIDIA GPU
Free
GPU utilization, memory, temperature, power
WiFi Signal
Free
Wireless signal quality on Windows + Linux
SNMP Poll
Free
SNMPv2c polling: MIB-2, IF-MIB, LLDP topology
SNMP Trap
Free
Trap/inform receiver (v2c + v3) → OTLP logs
ICMP Check
Free
Multi-target ping: reachability, RTT, packet loss
HTTP Check
Free
HTTP(S) status, latency phases, TLS cert expiry
TCP Dial
Free
Raw TCP connect latency to host:port
DNS Latency
Free
Resolution latency per name, per resolver
Modbus TCP
Free
Poll Modbus TCP Holding Registers on PLCs/sensors
UniFi
Free
Ubiquiti controller: devices, APs, client counts, WAN
Ping Gateway
Pro
Default gateway reachability and RTT
Ping WebApp
Pro
Web application availability via ICMP
MySQL / MariaDB
Free
Connections, InnoDB, replication, slow queries
PostgreSQL
Free
Connections, replication, bloat, archiver, pg_stat_statements
SQL Server
Free
Health and throughput via DMVs, OTel-aligned
MongoDB
Free
serverStatus, dbStats, replica set monitoring
Oracle Database
Free
Sessions, SGA/PGA, buffer cache, tablespace, wait classes
Redis
Free
Keyspace, memory, persistence, replication, commands
Cassandra
Free
Node health, request metrics, compaction, GC
CouchDB
Free
Request rate, open databases, replication state
ClickHouse
Free
Via /metrics Prometheus endpoint
Elasticsearch
Free
Cluster health, JVM, indexing, search, thread pools
OpenSearch
Free
Cluster and node metrics via REST API
Apache Solr
Free
JVM, request/error counters, core document count
InfluxDB
Free
Health, /metrics endpoint and bucket API
Memcached
Free
Connections, items, memory, hit/miss, evictions
Apache HTTP
Free
mod_status: workers, connections, requests, traffic
Nginx
Free
Connections, requests via stub_status module
HAProxy
Free
Sessions, throughput, error rates per frontend/backend
Envoy Proxy
Free
Server health, listener connections, cluster upstream
Varnish Cache
Free
Hit/miss, backend connections, threads, memory
PHP-FPM
Free
Pool stats, process counts, queue depth, slow requests
Apache Tomcat
Free
Threads, requests, sessions, JVM heap via Manager
WildFly / JBoss
Free
JVM, Undertow, JTA transactions, JDBC pool
Apache Kafka
Free
Brokers, topics, partitions, consumer group lag
RabbitMQ
Free
Queue depth, message counters, per-node resources
ActiveMQ
Free
Broker resources, queue/topic throughput via Jolokia
NATS
Free
Server health, connections, message rates, JetStream
Apache Pulsar
Free
Broker health, throughput, storage, backlog
Docker
Free
Per-container CPU, memory, network I/O, block I/O
Kubernetes
Free
Node, pod, deployment, PVC metrics via API server
Hyper-V
Free
Per-VM CPU, memory and state via WMI (Windows only)
Proxmox VE
Free
Nodes, VMs, LXC containers, storage via REST API
Citrix VDI
Pro
Sessions, machines, app launches, logon time, licenses
OTLP Receiver
Free
Agent as edge OTLP collector (gRPC + HTTP in)
Prometheus Scrape
Free
Scrape /metrics endpoints into the pipeline
Exec
Free
Run Nagios plugins or JSON scripts on interval
Syslog
Free
RFC3164/RFC5424 UDP/TCP receiver → OTLP logs
File Tail
Free
Glob-based log tailing with rotation + structured parsing
Event
Pro
HTTP receiver for custom JSON events → OTLP logs
Load WebApp
Pro
Web page load time measurement (HTTP GET + timing)
Consul
Free
Agent health, catalog, serf members, raft, health-check states
ZooKeeper
Free
Latency, connections, znodes via mntr four-letter command
Jenkins
Free
Job counts, build durations, queue depth, node status
Ceph
Free
Cluster health, OSD counts, monitor quorum, pool stats
Veeam
Pro
Backup jobs, repositories, proxies, license status
Redfish
Pro
Power, thermal, fans, disks, network adapters via BMC
NetScaler
Pro
Virtual servers, SSL certs, GSLB, HA state via REST API