Merging upstream version 1.29.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 533 insertions, 0 deletions

diff --git a/collectors/COLLECTORS.md b/collectors/COLLECTORS.md
new file mode 100644
index 000000000..e718fd239
--- /dev/null
+++ b/collectors/COLLECTORS.md
@@ -0,0 +1,533 @@
+<!--
+title: "Supported collectors list"
+description: "Netdata gathers real-time metrics from hundreds of data sources using collectors. Most require zero configuration and are pre-configured out of the box."
+custom_edit_url: https://github.com/netdata/netdata/edit/master/collectors/COLLECTORS.md
+-->
+
+# Supported collectors list
+
+Netdata uses collectors to help you gather metrics from your favorite applications and services and view them in
+real-time, interactive charts. The following list includes collectors for both external services/applications and
+internal system metrics.
+
+Learn more about [how collectors work](/docs/collect/how-collectors-work.md), and then learn how to [enable or
+configure](/docs/collect/enable-configure.md) any of the below collectors using the same process.
+
+Some collectors have both Go and Python versions as we continue our effort to migrate all collectors to Go. In these
+cases, _Netdata always prioritizes the Go version_, and we highly recommend you use the Go versions for the best
+experience.
+
+If you want to use a Python version of a collector, you need to explicitly [disable the Go
+version](/docs/collect/enable-configure.md), and enable the Python version. Netdata then skips the Go version and
+attempts to load the Python version and its accompanying configuration file.
+
+If you don't see the app/service you'd like to monitor in this list, check out our [GitHub
+issues](https://github.com/netdata/netdata/issues). Use the search bar to look for previous discussions about that
+collector—we may be looking for contributions from users such as yourself! If you don't see the collector there, make a
+[feature request](https://community.netdata.cloud/c/feature-requests/7/none) on our community forums.
+
+-   [Service and application collectors](#service-and-application-collectors)
+    -   [APM (application performance monitoring)](#apm-application-performance-monitoring)
+    -   [Containers and VMs](#containers-and-vms)
+    -   [Data stores](#data-stores)
+    -   [Distributed computing](#distributed-computing)
+    -   [Email](#email)
+    -   [Kubernetes](#kubernetes)
+    -   [Logs](#logs)
+    -   [Messaging](#messaging)
+    -   [Network](#network)
+    -   [Provisioning](#provisioning)
+    -   [Remote devices](#remote-devices)
+    -   [Search](#search)
+    -   [Storage](#storage)
+    -   [Web](#web)
+-   [System collectors](#system-collectors)
+    -   [Applications](#applications)
+    -   [Disks and filesystems](#disks-and-filesystems)
+    -   [eBPF (extended Berkeley Packet Filter)](#ebpf)
+    -   [Hardware](#hardware)
+    -   [Memory](#memory)
+    -   [Networks](#networks)
+    -   [Processes](#processes)
+    -   [Resources](#resources)
+    -   [Users](#users)
+-   [Netdata collectors](#netdata-collectors)
+-   [Orchestrators](#orchestrators)
+-   [Third-party collectors](#third-party-collectors)
+-   [Etc](#etc)
+
+## Service and application collectors
+
+The Netdata Agent auto-detects and collects metrics from all of the services and applications below. You can also
+configure any of these collectors according to your setup and infrastructure.
+
+### Generic
+
+-   [Prometheus endpoints](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/prometheus): Gathers
+    metrics from any number of Prometheus endpoints, with support to autodetect more than 600 services and applications.
+
+### APM (application performance monitoring)
+
+-   [Go applications](/collectors/python.d.plugin/go_expvar/README.md): Monitor any Go application that exposes its
+    metrics with the  `expvar` package from the Go standard library.
+-   [Java Spring Boot 2
+    applications](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/springboot2/) (Go version):
+    Monitor running Java Spring Boot 2 applications that expose their metrics with the use of the Spring Boot Actuator.
+-   [Java Spring Boot 2 applications](/collectors/python.d.plugin/springboot/README.md) (Python version): Monitor
+    running Java Spring Boot applications that expose their metrics with the use of the Spring Boot Actuator.
+-   [statsd](/collectors/statsd.plugin/README.md): Implement a high performance `statsd` server for Netdata.
+-   [phpDaemon](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/phpdaemon/): Collect worker
+    statistics (total, active, idle), and uptime for web and network applications.
+-   [uWSGI](/collectors/python.d.plugin/uwsgi/README.md): Monitor performance metrics exposed by the uWSGI Stats
+    Server.
+
+### Containers and VMs
+
+-   [Docker containers](/collectors/cgroups.plugin/README.md): Monitor the health and performance of individual Docker
+    containers using the cgroups collector plugin.
+-   [DockerD](/collectors/python.d.plugin/dockerd/README.md): Collect container health statistics.
+-   [Docker Engine](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/docker_engine/): Collect
+    runtime statistics from the `docker` daemon using the `metrics-address` feature.
+-   [Docker Hub](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/dockerhub/): Collect statistics
+    about Docker repositories, such as pulls, starts, status, time since last update, and more.
+-   [Libvirt](/collectors/cgroups.plugin/README.md): Monitor the health and performance of individual Libvirt containers
+    using the cgroups collector plugin.
+-   [LXC](/collectors/cgroups.plugin/README.md): Monitor the health and performance of individual LXC containers using
+    the cgroups collector plugin.
+-   [LXD](/collectors/cgroups.plugin/README.md): Monitor the health and performance of individual LXD containers using
+    the cgroups collector plugin.
+-   [systemd-nspawn](/collectors/cgroups.plugin/README.md): Monitor the health and performance of individual
+    systemd-nspawn containers using the cgroups collector plugin.
+-   [vCenter Server Appliance](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/vcsa/): Monitor
+    appliance system, components, and software update health statuses via the Health API.
+-   [vSphere](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/vsphere/): Collect host and virtual
+    machine performance metrics.
+-   [Xen/XCP-ng](/collectors/xenstat.plugin/README.md): Collect XenServer and XCP-ng metrics using `libxenstat`.
+
+### Data stores
+
+-   [CockroachDB](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/cockroachdb/): Monitor various
+    database components using `_status/vars` endpoint.
+-   [Consul](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/consul/): Capture service and unbound
+    checks status (passing, warning, critical, maintenance). 
+-   [Couchbase](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/couchbase/): Gather per-bucket
+    metrics from any number of instances of the distributed JSON document database.
+-   [CouchDB](/collectors/python.d.plugin/couchdb/README.md): Monitor database health and performance metrics
+    (reads/writes, HTTP traffic, replication status, etc).
+-   [MongoDB](/collectors/python.d.plugin/mongodb/README.md): Collect memory-caching system performance metrics and
+    reads the server's response to `stats` command (stats interface).
+-   [MySQL](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/mysql/): Collect database global,
+    replication and per user statistics.
+-   [OracleDB](/collectors/python.d.plugin/oracledb/README.md): Monitor database performance and health metrics.
+-   [Pika](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/pika/): Gather metric, such as clients,
+    memory usage, queries, and more from the Redis interface-compatible database.
+-   [Postgres](/collectors/python.d.plugin/postgres/README.md): Collect database health and performance metrics. 
+-   [ProxySQL](/collectors/python.d.plugin/proxysql/README.md): Monitor database backend and frontend performance
+    metrics.
+-   [Redis (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/redis/): Monitor status from any
+    number of database instances by reading the server's response to the `INFO ALL` command.
+-   [Redis (Python)](/collectors/python.d.plugin/redis/): Monitor database status by reading the server's response to
+    the `INFO` command.
+-   [RethinkDB](/collectors/python.d.plugin/rethinkdbs/README.md): Collect database server and cluster statistics.
+-   [Riak KV](/collectors/python.d.plugin/riakkv/README.md): Collect database stats from the `/stats` endpoint.
+-   [Zookeeper](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/zookeeper/): Monitor application
+    health metrics reading the server's response to the `mntr` command.
+
+### Distributed computing
+
+-   [BOINC](/collectors/python.d.plugin/boinc/README.md): Monitor the total number of tasks, open tasks, and task
+    states for the distributed computing client.
+-   [Gearman](/collectors/python.d.plugin/gearman/README.md): Collect application summary (queued, running) and per-job
+    worker statistics (queued, idle, running).
+
+### Email
+
+-   [Dovecot](/collectors/python.d.plugin/dovecot/README.md): Collect email server performance metrics by reading the
+    server's response to the `EXPORT global` command.
+-   [EXIM](/collectors/python.d.plugin/exim/README.md): Uses the `exim` tool to monitor the queue length of a
+    mail/message transfer agent (MTA).
+-   [Postfix](/collectors/python.d.plugin/postfix/README.md): Uses the `postqueue` tool to monitor the queue length of a
+    mail/message transfer agent (MTA).
+
+### Kubernetes
+
+-   [Kubelet](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/k8s_kubelet/): Monitor one or more
+    instances of the Kubelet agent and collects metrics on number of pods/containers running, volume of Docker
+    operations, and more.
+-   [kube-proxy](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/k8s_kubeproxy/): Collect
+    metrics, such as syncing proxy rules and REST client requests, from one or more instances of `kube-proxy`.
+-   [Service discovery](https://github.com/netdata/agent-service-discovery/): Find what services are running on a
+    cluster's pods, converts that into configuration files, and exports them so they can be monitored by Netdata.
+
+### Logs
+
+-   [Fluentd](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/fluentd/): Gather application
+    plugins metrics from an endpoint provided by `in_monitor plugin`.
+-   [Logstash](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/logstash/): Monitor JVM threads,
+    memory usage, garbage collection statistics, and more.
+-   [OpenVPN status logs](/collectors/python.d.plugin/ovpn_status_log/): Parse server log files and provide summary
+    (client, traffic) metrics.
+-   [Squid web server logs](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/squidlog/): Tail Squid
+    access logs to return the volume of requests, types of requests, bandwidth, and much more.
+-   [Web server logs (Go version for Apache,
+    NGINX)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/weblog/): Tail access logs and provide
+    very detailed web server performance statistics. This module is able to parse 200k+ rows in less than half a second.
+-   [Web server logs (Python version for Apache, NGINX, Squid)](/collectors/python.d.plugin/web_log/): Tail access log
+    file and collect web server/caching proxy metrics.
+
+### Messaging
+
+-   [ActiveMQ](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/activemq/): Collect message broker
+    queues and topics statistics using the ActiveMQ Console API.
+-   [Beanstalk](/collectors/python.d.plugin/beanstalk/README.md): Collect server and tube-level statistics, such as CPU
+    usage, jobs rates, commands, and more.
+-   [Pulsar](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/pulsar/): Collect summary,
+    namespaces, and topics performance statistics.
+-   [RabbitMQ (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/rabbitmq/): Collect message
+    broker overview, system and per virtual host metrics.
+-   [RabbitMQ (Python)](/collectors/python.d.plugin/rabbitmq/README.md): Collect message broker global and per virtual
+    host metrics. 
+-   [VerneMQ](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/vernemq/): Monitor MQTT broker
+    health and performance metrics. It collects all available info for both MQTTv3 and v5 communication
+
+### Network
+
+-   [Bind 9](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/bind/): Collect nameserver summary
+    performance statistics via a web interface (`statistics-channels` feature).
+-   [Chrony](/collectors/python.d.plugin/chrony/README.md): Monitor the precision and statistics of a local `chronyd`
+    server.
+-   [CoreDNS](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/coredns/): Measure DNS query round
+    trip time.
+-   [Dnsmasq](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/dnsmasq_dhcp/): Automatically
+    detects all configured `Dnsmasq` DHCP ranges and Monitor their utilization.
+-   [DNSdist (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/dnsdist/): Collect
+    load-balancer performance and health metrics.
+-   [DNSdist (Python)](/collectors/python.d.plugin/dnsdist/README.md): Collect load-balancer performance and health
+    metrics.
+-   [Dnsmasq DNS Forwarder](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/dnsmasq/): Gather
+    queries, entries, operations, and events for the lightweight DNS forwarder.
+-   [dns_query](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/dnsquery/): Monitor the round
+    trip time for DNS queries in milliseconds.
+-   [DNS Query Time](/collectors/python.d.plugin/dns_query_time/README.md): Measure DNS query round trip time.
+-   [Freeradius (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/freeradius/): Collect
+    server authentication and accounting statistics from the `status server`.
+-   [Freeradius (Python)](/collectors/python.d.plugin/freeradius/README.md): Collect server authentication and
+    accounting statistics from the `status server` using the `radclient` tool.
+-   [Libreswan](/collectors/charts.d.plugin/libreswan/): Collect bytes-in, bytes-out, and uptime metrics.
+-   [Icecast](/collectors/python.d.plugin/icecast/README.md): Monitor the number of listeners for active sources.
+-   [ISC BIND](/collectors/node.d.plugin/named/README.md): Collect nameserver summary performance statistics via a web
+    interface (`statistics-channels` feature).
+-   [ISC Bind (RDNC)](/collectors/python.d.plugin/bind_rndc/README.md): Collect nameserver summary performance
+    statistics using the `rndc` tool.
+-   [ISC DHCP (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/isc_dhcpd): Reads a
+    `dhcpd.leases` file and collects metrics on total active leases, pool active leases, and pool utilization.
+-   [ISC DHCP (Python)](/collectors/python.d.plugin/isc_dhcpd/README.md): Reads `dhcpd.leases` file and reports DHCP
+    pools utilization and leases statistics (total number, leases per pool).
+-   [OpenLDAP](/collectors/python.d.plugin/openldap/README.md): Provides statistics information from the OpenLDAP
+    (`slapd`) server.
+-   [NSD](/collectors/python.d.plugin/nsd/README.md): Monitor nameserver performance metrics using the `nsd-control`
+    tool.
+-   [NTP daemon](/collectors/python.d.plugin/ntpd/README.md): Monitor the system variables of the local `ntpd` daemon
+    (optionally including variables of the polled peers) using the NTP Control Message Protocol via a UDP socket.
+-   [OpenSIPS](/collectors/charts.d.plugin/opensips/README.md): Collect server health and performance metrics using the
+    `opensipsctl` tool.
+-   [OpenVPN](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/openvpn/): Gather server summary
+    (client, traffic) and per user metrics (traffic, connection time) stats using `management-interface`.
+-   [Pi-hole](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/pihole/): Monitor basic (DNS
+    queries, clients, blocklist) and extended (top clients, top permitted, and blocked domains) statistics using the PHP
+    API.
+-   [PowerDNS Authoritative Server
+    (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/powerdns): Monitor one or more instances
+    of the nameserver software to collect questions, events, and latency metrics.
+-   [PowerDNS Recursor (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/powerdns_recursor):
+    Gather incoming/outgoing questions, drops, timeouts, and cache usage from any number of DNS recursor instances.
+-   [PowerDNS (Python)](/collectors/python.d.plugin/powerdns/README.md): Monitor authoritative server and recursor
+    statistics.
+-   [RetroShare](/collectors/python.d.plugin/retroshare/README.md): Monitor application bandwidth, peers, and DHT
+    metrics.
+-   [Tor](/collectors/python.d.plugin/tor/README.md): Capture traffic usage statistics using the Tor control port.
+-   [Unbound](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/unbound/): Collect DNS resolver
+    summary and extended system and per thread metrics via the `remote-control` interface.
+
+### Provisioning
+
+-   [Puppet](/collectors/python.d.plugin/puppet/README.md): Monitor the status of Puppet Server and Puppet DB.
+
+### Remote devices
+
+-   [AM2320](/collectors/python.d.plugin/am2320/README.md): Monitor sensor temperature and humidity.
+-   [Access point](/collectors/charts.d.plugin/ap/README.md): Monitor client, traffic and signal metrics using the `aw`
+    tool.
+-   [APC UPS](/collectors/charts.d.plugin/apcupsd/README.md): Capture status information using the `apcaccess` tool.
+-   [Energi Core](/collectors/python.d.plugin/energid/README.md): Monitor blockchain, memory, network, and unspent
+    transactions statistics.
+-   [Fronius Symo](/collectors/node.d.plugin/fronius/): Collect power, consumption, autonomy, energy, and inverter
+    statistics.
+-   [UPS/PDU](/collectors/charts.d.plugin/nut/README.md): Read the status of UPS/PDU devices using the `upsc` tool.
+-   [SMA Sunny WebBox](/collectors/node.d.plugin/sma_webbox/README.md): Collect power statistics.
+-   [SNMP devices](/collectors/node.d.plugin/snmp/README.md): Gather data using the SNMP protocol.
+-   [Stiebel Eltron ISG](/collectors/node.d.plugin/stiebeleltron/README.md): Collect metrics from heat pump and hot
+    water installations.
+-   [1-Wire sensors](/collectors/python.d.plugin/w1sensor/README.md): Monitor sensor temperature.
+
+### Search
+
+-   [Elasticsearch (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/elasticsearch): Collect
+    dozens of metrics on search engine performance from local nodes and local indices. Includes cluster health and
+    statistics.
+-   [Elasticsearch (Python)](/collectors/python.d.plugin/elasticsearch/README.md): Collect search engine performance and
+    health statistics. Optionally collects per-index metrics.
+-   [Solr](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/solr/): Collect application search
+    requests, search errors, update requests, and update errors statistics.
+
+### Storage
+
+-   [Ceph](/collectors/python.d.plugin/ceph/README.md): Monitor the Ceph cluster usage and server data consumption.
+-   [HDFS](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/hdfs/): Monitor health and performance
+    metrics for filesystem datanodes and namenodes.
+-   [IPFS](/collectors/python.d.plugin/ipfs/README.md): Collect file system bandwidth, peers, and repo metrics.
+-   [Scaleio](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/scaleio/): Monitor storage system,
+    storage pools, and SDCS health and performance metrics via VxFlex OS Gateway API.
+-   [Samba](/collectors/python.d.plugin/samba/README.md): Collect file sharing metrics using the `smbstatus` tool.
+
+### Web
+
+-   [Apache (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/apache/): Collect Apache web
+    server performance metrics via the `server-status?auto` endpoint.
+-   [Apache (Python)](/collectors/python.d.plugin/apache/README.md): Collect Apache web server performance metrics via
+    the `server-status?auto` endpoint.
+-   [HAProxy](/collectors/python.d.plugin/haproxy/README.md): Collect frontend, backend, and health metrics.
+-   [HTTP endpoints (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/httpcheck/): Monitor
+    any HTTP endpoint's availability and response time.
+-   [HTTP endpoints (Python)](/collectors/python.d.plugin/httpcheck/README.md): Monitor any HTTP endpoint's
+    availability and response time.
+-   [Lighttpd](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/lighttpd/): Collect web server
+    performance metrics using the `server-status?auto` endpoint.
+-   [Lighttpd2](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/lighttpd2/): Collect web server
+    performance metrics using the `server-status?format=plain` endpoint.
+-   [Litespeed](/collectors/python.d.plugin/litespeed/README.md): Collect web server data (network, connection,
+    requests, cache) by reading `.rtreport*` files.
+-   [Nginx (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/nginx/): Monitor web server
+    status information by gathering metrics via `ngx_http_stub_status_module`.
+-   [Nginx (Python)](/collectors/python.d.plugin/nginx/README.md): Monitor web server status information by gathering
+    metrics via `ngx_http_stub_status_module`.
+-   [Nginx Plus](/collectors/python.d.plugin/nginx_plus/README.md): Collect global and per-server zone, upstream, and
+    cache metrics.
+-   [PHP-FPM (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/phpfpm/): Collect application
+    summary and processes health metrics by scraping the status page (`/status?full`).
+-   [PHP-FPM (Python)](/collectors/python.d.plugin/phpfpm/README.md): Collect application summary and processes health
+    metrics by scraping the status page (`/status?full`).
+-   [TCP endpoints (Go)](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/portcheck/): Monitor any
+    TCP endpoint's availability and response time.
+-   [TCP endpoints (Python)](/collectors/python.d.plugin/portcheck/README.md): Monitor any TCP endpoint's availability
+    and response time.
+-   [Spigot Minecraft servers](/collectors/python.d.plugin/spigotmc/README.md): Monitor average ticket rate and number
+    of users.
+-   [Squid](/collectors/python.d.plugin/squid/README.md): Monitor client and server bandwidth/requests by gathering
+    data from the Cache Manager component.
+-   [Tengine](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/tengine/): Monitor web server
+    statistics using information provided by `ngx_http_reqstat_module`.
+-   [Tomcat](/collectors/python.d.plugin/tomcat/README.md): Collect web server performance metrics from the Manager App
+    (`/manager/status?XML=true`).
+-   [Traefik](/collectors/python.d.plugin/traefik/README.md): Uses Trafik's Health API to provide statistics.
+-   [Varnish](/collectors/python.d.plugin/varnish/README.md): Provides HTTP accelerator global, backends (VBE), and
+    disks (SMF) statistics using the `varnishstat` tool.
+-   [x509 check](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/x509check/): Monitor certificate
+    expiration time.
+-   [Whois domain expiry](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/whoisquery/): Checks the
+    remaining time until a given domain is expired.
+
+## System collectors
+
+The Netdata Agent can collect these system- and hardware-level metrics using a variety of collectors, some of which
+(such as `proc.plugin`) collect multiple types of metrics simultaneously.
+
+### Applications
+
+-   [Fail2ban](/collectors/python.d.plugin/fail2ban/README.md): Parses configuration files to detect all jails, then
+    uses log files to report ban rates and volume of banned IPs.
+-   [Monit](/collectors/python.d.plugin/monit/README.md): Monitor statuses of targets (service-checks) using the XML
+    stats interface.
+-   [WMI (Windows Management Instrumentation)
+    exporter](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/wmi/): Collect CPU, memory,
+    network, disk, OS, system, and log-in metrics scraping `wmi_exporter`.
+
+### Disks and filesystems
+
+-   [BCACHE](/collectors/proc.plugin/README.md): Monitor BCACHE statistics with the the `proc.plugin` collector.
+-   [Block devices](/collectors/proc.plugin/README.md): Gather metrics about the health and performance of block
+    devices using the the `proc.plugin` collector.
+-   [Btrfs](/collectors/proc.plugin/README.md): Monitors Btrfs filesystems with the the `proc.plugin` collector.
+-   [Device mapper](/collectors/proc.plugin/README.md): Gather metrics about the Linux device mapper with the proc
+    collector.
+-   [Disk space](/collectors/diskspace.plugin/README.md): Collect disk space usage metrics on Linux mount points.
+-   [Files and directories](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/filecheck): Gather
+    metrics about the existence, modification time, and size of files or directories.
+-   [ioping.plugin](/collectors/ioping.plugin/README.md): Measure disk read/write latency.
+-   [NFS file servers and clients](/collectors/proc.plugin/README.md): Gather operations, utilization, and space usage
+    using the the `proc.plugin` collector.
+-   [RAID arrays](/collectors/proc.plugin/README.md): Collect health, disk status, operation status, and more with the
+    the `proc.plugin` collector.
+-   [Veritas Volume Manager](/collectors/proc.plugin/README.md): Gather metrics about the Veritas Volume Manager (VVM).
+-   [ZFS](/collectors/proc.plugin/README.md): Monitor bandwidth and utilization of ZFS disks/partitions using the proc
+    collector.
+
+### eBPF
+
+-   [Files](/collectors/ebpf.plugin/README.md): Provides information about how often a system calls kernel
+    functions related to file descriptors using the eBPF collector.
+-   [Virtual file system (VFS)](/collectors/ebpf.plugin/README.md): Monitor IO, errors, deleted objects, and
+    more for kernel virtual file systems (VFS) using the eBPF collector.
+-   [Processes](/collectors/ebpf.plugin/README.md): Monitor threads, task exits, and errors using the eBPF collector.
+
+### Hardware
+
+-   [Adaptec RAID](/collectors/python.d.plugin/adaptec_raid/README.md): Monitor logical and physical devices health
+    metrics using the `arcconf` tool. 
+-   [CUPS](/collectors/cups.plugin/README.md): Monitor CUPS.
+-   [FreeIPMI](/collectors/freeipmi.plugin/README.md): Uses `libipmimonitoring-dev` or `libipmimonitoring-devel` to
+    monitor the number of sensors, temperatures, voltages, currents, and more.
+-   [Hard drive temperature](/collectors/python.d.plugin/hddtemp/README.md): Monitor the temperature of storage
+    devices.
+-   [HP Smart Storage Arrays](/collectors/python.d.plugin/hpssa/README.md): Monitor controller, cache module, logical
+    and physical drive state, and temperature using the `ssacli` tool.
+-   [MegaRAID controllers](/collectors/python.d.plugin/megacli/README.md): Collect adapter, physical drives, and
+    battery stats using the `megacli` tool.
+-   [NVIDIA GPU](/collectors/python.d.plugin/nvidia_smi/README.md): Monitor performance metrics (memory usage, fan
+    speed, pcie bandwidth utilization, temperature, and more) using the `nvidia-smi` tool.
+-   [Sensors](/collectors/python.d.plugin/sensors/README.md): Reads system sensors information (temperature, voltage,
+    electric current, power, and more) from `/sys/devices/`.
+-   [S.M.A.R.T](/collectors/python.d.plugin/smartd_log/README.md): Reads SMART Disk Monitoring daemon logs.
+
+### Memory
+
+-   [Available memory](/collectors/proc.plugin/README.md): Tracks changes in available RAM using the the `proc.plugin`
+    collector.
+-   [Committed memory](/collectors/proc.plugin/README.md): Monitor committed memory using the `proc.plugin` collector.
+-   [Huge pages](/collectors/proc.plugin/README.md): Gather metrics about huge pages in Linux and FreeBSD with the
+    `proc.plugin` collector.
+-   [KSM](/collectors/proc.plugin/README.md): Measure the amount of merging, savings, and effectiveness using the
+    `proc.plugin` collector.
+-   [Memcached](/collectors/python.d.plugin/memcached/README.md): Collect memory-caching system performance metrics.
+-   [Numa](/collectors/proc.plugin/README.md): Gather metrics on the number of non-uniform memory access (NUMA) events
+    every second using the `proc.plugin` collector.
+-   [Page faults](/collectors/proc.plugin/README.md): Collect the number of memory page faults per second using the
+    `proc.plugin` collector.
+-   [RAM](/collectors/proc.plugin/README.md): Collect metrics on system RAM, available RAM, and more using the
+    `proc.plugin` collector.
+-   [SLAB](/collectors/slabinfo.plugin/README.md): Collect kernel SLAB details on Linux systems.
+-   [swap](/collectors/proc.plugin/README.md): Monitor the amount of free and used swap at every second using the
+    `proc.plugin` collector.
+-   [Writeback memory](/collectors/proc.plugin/README.md): Collect how much memory is actively being written to disk at
+    every second using the `proc.plugin` collector.
+
+### Networks
+
+-   [Access points](/collectors/charts.d.plugin/ap/README.md): Visualizes data related to access points.
+-   [fping.plugin](fping.plugin/README.md): Measure network latency, jitter and packet loss between the monitored node
+    and any number of remote network end points.
+-   [Netfilter](/collectors/nfacct.plugin/README.md): Collect netfilter firewall, connection tracker, and accounting
+    metrics using `libmnl` and `libnetfilter_acct`.
+-   [Network stack](/collectors/proc.plugin/README.md): Monitor the networking stack for errors, TCP connection aborts,
+    bandwidth, and more.
+-   [Network QoS](/collectors/tc.plugin/README.md): Collect traffic QoS metrics (`tc`) of Linux network interfaces.
+-   [SYNPROXY](/collectors/proc.plugin/README.md): Monitor entries uses, SYN packets received, TCP cookies, and more.
+
+### Operating systems
+
+-   [freebsd.plugin](freebsd.plugin/README.md): Collect resource usage and performance data on FreeBSD systems.
+-   [macOS](/collectors/macos.plugin/README.md): Collect resource usage and performance data on macOS systems.
+
+### Processes
+
+-   [Applications](/collectors/apps.plugin/README.md): Gather CPU, disk, memory, network, eBPF, and other metrics per
+    application using the `apps.plugin` collector.
+-   [systemd](/collectors/cgroups.plugin/README.md): Monitor the CPU and memory usage of systemd services using the
+    `cgroups.plugin` collector.
+-   [systemd unit states](https://learn.netdata.cloud/docs/agent/collectors/go.d.plugin/modules/systemdunits): See the 
+    state (active, inactive, activating, deactivating, failed) of various systemd unit types.
+-   [System processes](/collectors/proc.plugin/README.md): Collect metrics on system load and total processes running
+    using `/proc/loadavg` and the `proc.plugin` collector.
+-   [Uptime](/collectors/proc.plugin/README.md): Monitor the uptime of a system using the `proc.plugin` collector.
+
+### Resources
+
+-   [CPU frequency](/collectors/proc.plugin/README.md): Monitor CPU frequency, as set by the `cpufreq` kernel module,
+    using the `proc.plugin` collector.
+-   [CPU idle](/collectors/proc.plugin/README.md): Measure CPU idle every second using the `proc.plugin` collector.
+-   [CPU performance](/collectors/perf.plugin/README.md): Collect CPU performance metrics using performance monitoring
+    units (PMU).
+-   [CPU throttling](/collectors/proc.plugin/README.md): Gather metrics about thermal throttling using the `/proc/stat`
+    module and the `proc.plugin` collector. 
+-   [CPU utilization](/collectors/proc.plugin/README.md): Capture CPU utilization, both system-wide and per-core, using
+    the `/proc/stat` module and the `proc.plugin` collector. 
+-   [Entropy](/collectors/proc.plugin/README.md): Monitor the available entropy on a system using the `proc.plugin`
+    collector.
+-   [Interprocess Communication (IPC)](/collectors/proc.plugin/README.md): Monitor IPC semaphores and shared memory
+    using the `proc.plugin` collector.
+-   [Interrupts](/collectors/proc.plugin/README.md): Monitor interrupts per second using the `proc.plugin` collector.
+-   [IdleJitter](/collectors/idlejitter.plugin/README.md): Measure CPU latency and jitter on all operating systems.
+-   [SoftIRQs](/collectors/proc.plugin/README.md): Collect metrics on SoftIRQs, both system-wide and per-core, using the
+    `proc.plugin` collector.
+-   [SoftNet](/collectors/proc.plugin/README.md): Capture SoftNet events per second, both system-wide and per-core,
+    using the `proc.plugin` collector. 
+
+### Users
+
+-   [systemd-logind](/collectors/python.d.plugin/logind/README.md): Monitor active sessions, users, and seats tracked
+    by `systemd-logind` or `elogind`.
+-   [User/group usage](/collectors/apps.plugin/README.md): Gather CPU, disk, memory, network, and other metrics per user
+    and user group using the `apps.plugin` collector.
+
+## Netdata collectors
+
+These collectors are recursive in nature, in that they monitor some function of the Netdata Agent itself. Some
+collectors are described only in code and associated charts in Netdata dashboards.
+
+-   [ACLK (code only)](https://github.com/netdata/netdata/blob/master/aclk/aclk_stats.c): View whether a Netdata Agent
+    is connected to Netdata Cloud via the [ACLK](/aclk/README.md), the volume of queries, process times, and more.
+-   [Alarms](https://learn.netdata.cloud/docs/agent/collectors/python.d.plugin/alarms): This collector creates an
+    <strong>Alarms</strong> menu with one line plot showing the alarm states of a Netdata Agent over time.
+-   [Anomalies](https://learn.netdata.cloud/docs/agent/collectors/python.d.plugin/anomalies): This collector uses the
+    Python PyOD library to perform unsupervised anomaly detection on your Netdata charts and/or dimensions.
+-   [Exporting (code only)](https://github.com/netdata/netdata/blob/master/exporting/send_internal_metrics.c): Gather
+    metrics on CPU utilization for the [exporting engine](/exporting/README.md), and specific metrics for each enabled
+    exporting connector.
+-   [Global statistics (code only)](https://github.com/netdata/netdata/blob/master/daemon/global_statistics.c): See
+    metrics on the CPU utilization, network traffic, volume of web clients, API responses, database engine usage, and
+    more.
+
+## Orchestrators
+
+Plugin orchestrators organize and run many of the above collectors.
+
+If you're interested in developing a new collector that you'd like to contribute to Netdata, we highly recommend using
+the `go.d.plugin`.
+
+-   [go.d.plugin](https://github.com/netdata/go.d.plugin): An orchestrator for data collection modules written in `go`.
+-   [python.d.plugin](python.d.plugin/README.md): An orchestrator for data collection modules written in `python` v2/v3.
+-   [charts.d.plugin](charts.d.plugin/README.md): An orchestrator for data collection modules written in `bash` v4+.
+-   [node.d.plugin](node.d.plugin/README.md): An orchestrator for data collection modules written in `node.js`.
+
+## Third-party collectors
+
+These collectors are developed and maintained by third parties and, unlike the other collectors, are not installed by
+default. To use a third-party collector, visit their GitHub/documentation page and follow their installation procedures.
+
+-   [CyberPower UPS](https://github.com/HawtDogFlvrWtr/netdata_cyberpwrups_plugin): Polls CyberPower UPS data using
+    PowerPanel® Personal Linux.
+-   [Logged-in users](https://github.com/veksh/netdata-numsessions): Collect the number of currently logged-on users.
+-   [nim-netdata-plugin](https://github.com/FedericoCeratto/nim-netdata-plugin): A helper to create native Netdata
+    plugins using Nim.
+-   [Nvidia GPUs](https://github.com/coraxx/netdata_nv_plugin): Monitor Nvidia GPUs.
+-   [Teamspeak 3](https://github.com/coraxx/netdata_ts3_plugin): Plls active users and bandwidth from TeamSpeak 3
+    servers.
+-   [SSH](https://github.com/Yaser-Amiri/netdata-ssh-module): Monitor failed authentication requests of an SSH server.
+
+## Etc
+
+-   [checks.plugin](checks.plugin/README.md): A debugging collector, disabled by default.
+-   [charts.d example](charts.d.plugin/example/README.md): An example `charts.d` collector.
+-   [python.d example](python.d.plugin/example/README.md): An example `python.d` collector.
+
+[![analytics](https://www.google-analytics.com/collect?v=1&aip=1&t=pageview&_s=1&ds=github&dr=https%3A%2F%2Fgithub.com%2Fnetdata%2Fnetdata&dl=https%3A%2F%2Fmy-netdata.io%2Fgithub%2Fcollectors%2FCOLLECTORS&_u=MAC~&cid=5792dfd7-8dc4-476b-af31-da2fdb9f93d2&tid=UA-64295674-3)](<>)