## NetData [NetData](http://my-netdata.io/) is a system for **distributed real-time performance and health monitoring**. It provides **unparalleled insights, in real-time**, of everything happening on the system it runs (including applications such as web and database servers), using **modern interactive web dashboards**. _netdata is **fast** and **efficient**, designed to permanently run on all systems (**physical** & **virtual** servers, **containers**, **IoT** devices), without disrupting their core function._ [](https://install-app.yunohost.org/?app=piwigo) **Customization brought by the package:** * grant MySQL statistics access via a `netdata` user * nginx root log statistics via putting `netdata` user in the `adm` group * Dovecot statistics via giving access to Dovecot stats stocket to `netdata` user (works only with Dovecot 2.2.16+) **Further recommendations:** We don't allow YunoHost packages to make sensible changes to system files. So here are further customizations you can make to allow more monitoring: * Nginx: * requests/connections: follow [these recommandations](https://github.com/firehol/netdata/tree/master/python.d#nginx) to enable `/stab_status` (for example by putting the `location` section in `/etc/nginx/conf.d/yunohost_admin.conf` * weblogs: you can monitor all your nginx weblogs for errors; follow [these recommendations](https://github.com/firehol/netdata/tree/master/python.d#nginx_log) * phpfpm: follow [these recommandations](https://github.com/firehol/netdata/tree/master/python.d#phpfpm) ## Features <p align="center"> <img src="https://cloud.githubusercontent.com/assets/2662304/19168687/f6a567be-8c19-11e6-8561-ce8d589e8346.gif"/> </p> - **Stunning interactive bootstrap dashboards**<br/> mouse and touch friendly, in 2 themes: dark, light - **Amazingly fast**<br/> responds to all queries in less than 0.5 ms per metric, even on low-end hardware - **Highly efficient**<br/> collects thousands of metrics per server per second, with just 1% CPU utilization of a single core, a few MB of RAM and no disk I/O at all - **Sophisticated alarming**<br/> hundreds of alarms, **out of the box**!<br/> supports dynamic thresholds, hysteresis, alarm templates, multiple role-based notification methods (such as email, slack.com, pushover.net, pushbullet.com, telegram.org, twilio.com, messagebird.com) - **Extensible**<br/> you can monitor anything you can get a metric for, using its Plugin API (anything can be a netdata plugin, BASH, python, perl, node.js, java, Go, ruby, etc) - **Embeddable**<br/> it can run anywhere a Linux kernel runs (even IoT) and its charts can be embedded on your web pages too - **Customizable**<br/> custom dashboards can be built using simple HTML (no javascript necessary) - **Zero configuration**<br/> auto-detects everything, it can collect up to 5000 metrics per server out of the box - **Zero dependencies**<br/> it is even its own web server, for its static web files and its web API - **Zero maintenance**<br/> you just run it, it does the rest - **scales to infinity**<br/> requiring minimal central resources - **several operating modes**<br/> autonomous host monitoring, headless data collector, forwarding proxy, store and forward proxy, central multi-host monitoring, in all possible configurations. Each node may have different metrics retention policy and run with or without health monitoring. - **time-series back-ends supported**<br/> can archive its metrics on `graphite`, `opentsdb`, `prometheus`, json document DBs, in the same or lower detail (lower: to prevent it from congesting these servers due to the amount of data collected)  --- ## What does it monitor? netdata collects several thousands of metrics per device. All these metrics are collected and visualized in real-time. > _Almost all metrics are auto-detected, without any configuration._ This is a list of what it currently monitors: - **CPU**<br/> usage, interrupts, softirqs, frequency, total and per core, CPU states - **Memory**<br/> RAM, swap and kernel memory usage, KSM (Kernel Samepage Merging), NUMA - **Disks**<br/> per disk: I/O, operations, backlog, utilization, space, software RAID (md)  - **Network interfaces**<br/> per interface: bandwidth, packets, errors, drops  - **IPv4 networking**<br/> bandwidth, packets, errors, fragments, tcp: connections, packets, errors, handshake, udp: packets, errors, broadcast: bandwidth, packets, multicast: bandwidth, packets - **IPv6 networking**<br/> bandwidth, packets, errors, fragments, ECT, udp: packets, errors, udplite: packets, errors, broadcast: bandwidth, multicast: bandwidth, packets, icmp: messages, errors, echos, router, neighbor, MLDv2, group membership, break down by type - **Interprocess Communication - IPC**<br/> such as semaphores and semaphores arrays - **netfilter / iptables Linux firewall**<br/> connections, connection tracker events, errors - **Linux DDoS protection**<br/> SYNPROXY metrics - **fping** latencies</br> for any number of hosts, showing latency, packets and packet loss  - **Processes**<br/> running, blocked, forks, active - **Entropy**<br/> random numbers pool, using in cryptography - **NFS file servers and clients**<br/> NFS v2, v3, v4: I/O, cache, read ahead, RPC calls - **Network QoS**<br/> the only tool that visualizes network `tc` classes in realtime  - **Linux Control Groups**<br/> containers: systemd, lxc, docker - **Applications**<br/> by grouping the process tree and reporting CPU, memory, disk reads, disk writes, swap, threads, pipes, sockets - per group  - **Users and User Groups resource usage**<br/> by summarizing the process tree per user and group, reporting: CPU, memory, disk reads, disk writes, swap, threads, pipes, sockets - **Apache and lighttpd web servers**<br/> `mod-status` (v2.2, v2.4) and cache log statistics, for multiple servers - **Nginx web servers**<br/> `stub-status`, for multiple servers - **Tomcat**<br/> accesses, threads, free memory, volume - **web server log files**<br/> extracting in real-time, web server performance metrics and applying several health checks - **mySQL databases**<br/> multiple servers, each showing: bandwidth, queries/s, handlers, locks, issues, tmp operations, connections, binlog metrics, threads, innodb metrics, and more - **Postgres databases**<br/> multiple servers, each showing: per database statistics (connections, tuples read - written - returned, transactions, locks), backend processes, indexes, tables, write ahead, background writer and more - **Redis databases**<br/> multiple servers, each showing: operations, hit rate, memory, keys, clients, slaves - **mongodb**<br/> operations, clients, transactions, cursors, connections, asserts, locks, etc - **memcached databases**<br/> multiple servers, each showing: bandwidth, connections, items - **elasticsearch**<br/> search and index performance, latency, timings, cluster statistics, threads statistics, etc - **ISC Bind name servers**<br/> multiple servers, each showing: clients, requests, queries, updates, failures and several per view metrics - **NSD name servers**<br/> queries, zones, protocols, query types, transfers, etc. - **Postfix email servers**<br/> message queue (entries, size) - **exim email servers**<br/> message queue (emails queued) - **Dovecot** POP3/IMAP servers<br/> - **ISC dhcpd**<br/> pools utilization, leases, etc. - **IPFS**<br/> bandwidth, peers - **Squid proxy servers**<br/> multiple servers, each showing: clients bandwidth and requests, servers bandwidth and requests - **HAproxy**<br/> bandwidth, sessions, backends, etc - **varnish**<br/> threads, sessions, hits, objects, backends, etc - **OpenVPN**<br/> status per tunnel - **Hardware sensors**<br/> `lm_sensors` and `IPMI`: temperature, voltage, fans, power, humidity - **NUT and APC UPSes**<br/> load, charge, battery voltage, temperature, utility metrics, output metrics - **PHP-FPM**<br/> multiple instances, each reporting connections, requests, performance - **hddtemp**<br/> disk temperatures - **smartd**<br/> disk S.M.A.R.T. values - **SNMP devices**<br/> can be monitored too (although you will need to configure these) - **statsd**<br/> [netdata is a fully featured statsd server](https://github.com/firehol/netdata/wiki/statsd) And you can extend it, by writing plugins that collect data from any source, using any computer language. ## Links * Report a bug: https://github.com/YunoHost-Apps/netdata_ynh/issues * NetData website: http://my-netdata.io/