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.

All OS & Host Network Databases Web Servers Messaging Containers & VMs Collection DevOps Storage Hardware ADC Cloud

All tiers Free Pro

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 NTP (direct) Free Clock error measured against a reference server, no daemon needed OS Updates Free Pending updates, security updates, reboot required 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 SNMP v2c and v3 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 Docker Swarm Free Nodes and quorum, service convergence, overlay segments 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 Free 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 Dell PowerStore Pro Array health, capacity, performance, replication, alerts Redfish Pro Power, thermal, fans, disks, network adapters via BMC NetScaler Pro Virtual servers, SSL certs, GSLB, HA state via REST API IBM i Pro CPU, ASP/disk, jobs, subsystems, DB, journals, hardware, PTF SQL Server AlwaysOn Pro AlwaysOn AG replica health, database lag and redo/send queues Oracle Database (Enterprise) Pro AWR rates, ASH wait classes, RAC, Data Guard lag Hyper-V HA Pro Hyper-V Replica health/lag and Failover Cluster node/group state VMware vSphere HA Pro vSAN cluster health, NSX-T overlay status Azure AD Connect Health Pro Hybrid identity sync health, agent liveness, export errors Exchange Online Pro Mail flow, mailboxes, storage, and service health Azure Container Apps Pro Console log stream of every replica, read through ARM Azure Container App Jobs Pro Execution verdict, duration and output of each job run

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Product names and logos are trademarks of their respective owners. They appear here only to identify the system a probe reads, and imply no partnership, endorsement or certification. Sources are listed in assets/probe-logos/SOURCES.md.