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-rw-r--r--daemon/config/README.md70
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diff --git a/daemon/config/README.md b/daemon/config/README.md
index 7b4d27ecf..4a6d0bb80 100644
--- a/daemon/config/README.md
+++ b/daemon/config/README.md
@@ -1,7 +1,12 @@
<!--
title: "Daemon configuration"
description: "The Netdata Agent's daemon is installed preconfigured to collect thousands of metrics every second, but is highly configurable for real-world workloads."
-custom_edit_url: https://github.com/netdata/netdata/edit/master/daemon/config/README.md
+custom_edit_url: "https://github.com/netdata/netdata/edit/master/daemon/config/README.md"
+sidebar_label: "Daemon"
+learn_status: "Published"
+learn_topic_type: "References"
+learn_rel_path: "References/Configuration"
+learn_doc_purpose: "Explain the daemon options, the log files, the process scheduling, virtual memory, explain how the netdata.conf is used and backlink to the netdata.conf file reference"
-->
# Daemon configuration
@@ -21,24 +26,24 @@ adapt the general behavior of Netdata, in great detail. You can find all these s
accessing the URL `https://netdata.server.hostname:19999/netdata.conf`. For example check the configuration file
of [netdata.firehol.org](http://netdata.firehol.org/netdata.conf). HTTP access to this file is limited by default to
[private IPs](https://en.wikipedia.org/wiki/Private_network), via
-the [web server access lists](/web/server/README.md#access-lists).
+the [web server access lists](https://github.com/netdata/netdata/blob/master/web/server/README.md#access-lists).
`netdata.conf` has sections stated with `[section]`. You will see the following sections:
-1. `[global]` to [configure](#global-section-options) the [Netdata daemon](/daemon/README.md).
+1. `[global]` to [configure](#global-section-options) the [Netdata daemon](https://github.com/netdata/netdata/blob/master/daemon/README.md).
2. `[db]` to [configure](#db-section-options) the database of Netdata.
3. `[directories]` to [configure](#directories-section-options) the directories used by Netdata.
4. `[logs]` to [configure](#logs-section-options) the Netdata logging.
5. `[environment variables]` to [configure](#environment-variables-section-options) the environment variables used
Netdata.
-6. `[sqlite]` to [configure](#sqlite-section-options) the [Netdata daemon](/daemon/README.md) SQLite settings.
-7. `[ml]` to configure settings for [machine learning](/ml/README.md).
-8. `[health]` to [configure](#health-section-options) general settings for [health monitoring](/health/README.md).
-9. `[web]` to [configure the web server](/web/server/README.md).
-10. `[registry]` for the [Netdata registry](/registry/README.md).
-11. `[global statistics]` for the [Netdata registry](/registry/README.md).
-12. `[statsd]` for the general settings of the [stats.d.plugin](/collectors/statsd.plugin/README.md).
-13. `[plugins]` to [configure](#plugins-section-options) which [collectors](/collectors/README.md) to use and PATH
+6. `[sqlite]` to [configure](#sqlite-section-options) the [Netdata daemon](https://github.com/netdata/netdata/blob/master/daemon/README.md) SQLite settings.
+7. `[ml]` to configure settings for [machine learning](https://github.com/netdata/netdata/blob/master/ml/README.md).
+8. `[health]` to [configure](#health-section-options) general settings for [health monitoring](https://github.com/netdata/netdata/blob/master/health/README.md).
+9. `[web]` to [configure the web server](https://github.com/netdata/netdata/blob/master/web/server/README.md).
+10. `[registry]` for the [Netdata registry](https://github.com/netdata/netdata/blob/master/registry/README.md).
+11. `[global statistics]` for the [Netdata registry](https://github.com/netdata/netdata/blob/master/registry/README.md).
+12. `[statsd]` for the general settings of the [stats.d.plugin](https://github.com/netdata/netdata/blob/master/collectors/statsd.plugin/README.md).
+13. `[plugins]` to [configure](#plugins-section-options) which [collectors](https://github.com/netdata/netdata/blob/master/collectors/README.md) to use and PATH
settings.
14. `[plugin:NAME]` sections for each collector plugin, under the
comment [Per plugin configuration](#per-plugin-configuration).
@@ -49,7 +54,7 @@ comment on settings it does not currently use.
## Applying changes
-After `netdata.conf` has been modified, Netdata needs to be [restarted](/docs/configure/start-stop-restart.md) for
+After `netdata.conf` has been modified, Netdata needs to be [restarted](https://github.com/netdata/netdata/blob/master/docs/configure/start-stop-restart.md) for
changes to apply:
```bash
@@ -70,10 +75,10 @@ Please note that your data history will be lost if you have modified `history` p
| setting | default | info |
|:-------------------------------------:|:-------------:|:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| process scheduling policy | `keep` | See [Netdata process scheduling policy](/daemon/README.md#netdata-process-scheduling-policy) |
+| process scheduling policy | `keep` | See [Netdata process scheduling policy](https://github.com/netdata/netdata/blob/master/daemon/README.md#netdata-process-scheduling-policy) |
| OOM score | `0` | |
-| glibc malloc arena max for plugins | `1` | See [Virtual memory](/daemon/README.md#virtual-memory). |
-| glibc malloc arena max for Netdata | `1` | See [Virtual memory](/daemon/README.md#virtual-memory). |
+| glibc malloc arena max for plugins | `1` | See [Virtual memory](https://github.com/netdata/netdata/blob/master/daemon/README.md#virtual-memory). |
+| glibc malloc arena max for Netdata | `1` | See [Virtual memory](https://github.com/netdata/netdata/blob/master/daemon/README.md#virtual-memory). |
| hostname | auto-detected | The hostname of the computer running Netdata. |
| host access prefix | empty | This is used in docker environments where /proc, /sys, etc have to be accessed via another path. You may also have to set SYS_PTRACE capability on the docker for this work. Check [issue 43](https://github.com/netdata/netdata/issues/43). |
| timezone | auto-detected | The timezone retrieved from the environment variable |
@@ -84,22 +89,22 @@ Please note that your data history will be lost if you have modified `history` p
| setting | default | info |
|:---------------------------------------------:|:----------:|:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| mode | `dbengine` | `dbengine`: The default for long-term metrics storage with efficient RAM and disk usage. Can be extended with `dbengine page cache size MB` and `dbengine disk space MB`. <br />`save`: Netdata will save its round robin database on exit and load it on startup. <br />`map`: Cache files will be updated in real-time. Not ideal for systems with high load or slow disks (check `man mmap`). <br />`ram`: The round-robin database will be temporary and it will be lost when Netdata exits. <br />`none`: Disables the database at this host, and disables health monitoring entirely, as that requires a database of metrics. |
-| retention | `3600` | Used with `mode = save/map/ram/alloc`, not the default `mode = dbengine`. This number reflects the number of entries the `netdata` daemon will by default keep in memory for each chart dimension. Check [Memory Requirements](/database/README.md) for more information. |
-| storage tiers | `1` | The number of storage tiers you want to have in your dbengine. Check the tiering mechanism in the [dbengine's reference](/database/engine/README.md#tiering). You can have up to 5 tiers of data (including the _Tier 0_). This number ranges between 1 and 5. |
+| mode | `dbengine` | `dbengine`: The default for long-term metrics storage with efficient RAM and disk usage. Can be extended with `dbengine page cache size MB` and `dbengine disk space MB`. <br />`save`: Netdata will save its round robin database on exit and load it on startup. <br />`map`: Cache files will be updated in real-time. Not ideal for systems with high load or slow disks (check `man mmap`). <br />`ram`: The round-robin database will be temporary and it will be lost when Netdata exits. <br />`alloc`: Similar to `ram`, but can significantly reduce memory usage, when combined with a low retention and does not support KSM. <br />`none`: Disables the database at this host, and disables health monitoring entirely, as that requires a database of metrics. Not to be used together with streaming. |
+| retention | `3600` | Used with `mode = save/map/ram/alloc`, not the default `mode = dbengine`. This number reflects the number of entries the `netdata` daemon will by default keep in memory for each chart dimension. Check [Memory Requirements](https://github.com/netdata/netdata/blob/master/database/README.md) for more information. |
+| storage tiers | `1` | The number of storage tiers you want to have in your dbengine. Check the tiering mechanism in the [dbengine's reference](https://github.com/netdata/netdata/blob/master/database/engine/README.md#tiering). You can have up to 5 tiers of data (including the _Tier 0_). This number ranges between 1 and 5. |
| dbengine page cache size MB | `32` | Determines the amount of RAM in MiB that is dedicated to caching for _Tier 0_ Netdata metric values. |
| dbengine tier **`N`** page cache size MB | `32` | Determines the amount of RAM in MiB that is dedicated for caching Netdata metric values of the **`N`** tier. <br /> `N belongs to [1..4]` ||
| dbengine disk space MB | `256` | Determines the amount of disk space in MiB that is dedicated to storing _Tier 0_ Netdata metric values and all related metadata describing them. This option is available **only for legacy configuration** (`Agent v1.23.2 and prior`). |
| dbengine multihost disk space MB | `256` | Same functionality as `dbengine disk space MB`, but includes support for storing metrics streamed to a parent node by its children. Can be used in single-node environments as well. This setting is only for _Tier 0_ metrics. |
| dbengine tier **`N`** multihost disk space MB | `256` | Same functionality as `dbengine multihost disk space MB`, but stores metrics of the **`N`** tier (both parent node and its children). Can be used in single-node environments as well. <br /> `N belongs to [1..4]` |
-| update every | `1` | The frequency in seconds, for data collection. For more information see the [performance guide](/docs/guides/configure/performance.md). These metrics stored as _Tier 0_ data. Explore the tiering mechanism in the [dbengine's reference](/database/engine/README.md#tiering). |
+| update every | `1` | The frequency in seconds, for data collection. For more information see the [performance guide](https://github.com/netdata/netdata/blob/master/docs/guides/configure/performance.md). These metrics stored as _Tier 0_ data. Explore the tiering mechanism in the [dbengine's reference](https://github.com/netdata/netdata/blob/master/database/engine/README.md#tiering). |
| dbengine tier **`N`** update every iterations | `60` | The down sampling value of each tier from the previous one. For each Tier, the greater by one Tier has N (equal to 60 by default) less data points of any metric it collects. This setting can take values from `2` up to `255`. <br /> `N belongs to [1..4]` |
| dbengine tier **`N`** back fill | `New` | Specifies the strategy of recreating missing data on each Tier from the exact lower Tier. <br /> `New`: Sees the latest point on each Tier and save new points to it only if the exact lower Tier has available points for it's observation window (`dbengine tier N update every iterations` window). <br /> `none`: No back filling is applied. <br /> `N belongs to [1..4]` |
-| memory deduplication (ksm) | `yes` | When set to `yes`, Netdata will offer its in-memory round robin database and the dbengine page cache to kernel same page merging (KSM) for deduplication. For more information check [Memory Deduplication - Kernel Same Page Merging - KSM](/database/README.md#ksm) |
-| cleanup obsolete charts after secs | `3600` | See [monitoring ephemeral containers](/collectors/cgroups.plugin/README.md#monitoring-ephemeral-containers), also sets the timeout for cleaning up obsolete dimensions |
+| memory deduplication (ksm) | `yes` | When set to `yes`, Netdata will offer its in-memory round robin database and the dbengine page cache to kernel same page merging (KSM) for deduplication. For more information check [Memory Deduplication - Kernel Same Page Merging - KSM](https://github.com/netdata/netdata/blob/master/database/README.md#ksm) |
+| cleanup obsolete charts after secs | `3600` | See [monitoring ephemeral containers](https://github.com/netdata/netdata/blob/master/collectors/cgroups.plugin/README.md#monitoring-ephemeral-containers), also sets the timeout for cleaning up obsolete dimensions |
| gap when lost iterations above | `1` | |
| cleanup orphan hosts after secs | `3600` | How long to wait until automatically removing from the DB a remote Netdata host (child) that is no longer sending data. |
-| delete obsolete charts files | `yes` | See [monitoring ephemeral containers](/collectors/cgroups.plugin/README.md#monitoring-ephemeral-containers), also affects the deletion of files for obsolete dimensions |
+| delete obsolete charts files | `yes` | See [monitoring ephemeral containers](https://github.com/netdata/netdata/blob/master/collectors/cgroups.plugin/README.md#monitoring-ephemeral-containers), also affects the deletion of files for obsolete dimensions |
| delete orphan hosts files | `yes` | Set to `no` to disable non-responsive host removal. |
| enable zero metrics | `no` | Set to `yes` to show charts when all their metrics are zero. |
@@ -116,7 +121,7 @@ The multiplication of all the **enabled** tiers `dbengine tier N update every i
|:-------------------:|:------------------------------------------------------------------:|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| config | `/etc/netdata` | The directory configuration files are kept. |
| stock config | `/usr/lib/netdata/conf.d` | |
-| log | `/var/log/netdata` | The directory in which the [log files](/daemon/README.md#log-files) are kept. |
+| log | `/var/log/netdata` | The directory in which the [log files](https://github.com/netdata/netdata/blob/master/daemon/README.md#log-files) are kept. |
| web | `/usr/share/netdata/web` | The directory the web static files are kept. |
| cache | `/var/cache/netdata` | The directory the memory database will be stored if and when Netdata exits. Netdata will re-read the database when it will start again, to continue from the same point. |
| lib | `/var/lib/netdata` | Contains the alarm log and the Netdata instance GUID. |
@@ -125,14 +130,14 @@ The multiplication of all the **enabled** tiers `dbengine tier N update every i
| plugins | `"/usr/libexec/netdata/plugins.d" "/etc/netdata/custom-plugins.d"` | The directory plugin programs are kept. This setting supports multiple directories, space separated. If any directory path contains spaces, enclose it in single or double quotes. |
| health config | `/etc/netdata/health.d` | The directory containing the user alarm configuration files, to override the stock configurations |
| stock health config | `/usr/lib/netdata/conf.d/health.d` | Contains the stock alarm configuration files for each collector |
-| registry | `/opt/netdata/var/lib/netdata/registry` | Contains the [registry](/registry/README.md) database and GUID that uniquely identifies each Netdata Agent |
+| registry | `/opt/netdata/var/lib/netdata/registry` | Contains the [registry](https://github.com/netdata/netdata/blob/master/registry/README.md) database and GUID that uniquely identifies each Netdata Agent |
### [logs] section options
| setting | default | info |
|:----------------------------------:|:-----------------------------:|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| debug flags | `0x0000000000000000` | Bitmap of debug options to enable. For more information check [Tracing Options](/daemon/README.md#debugging). |
-| debug | `/var/log/netdata/debug.log` | The filename to save debug information. This file will not be created if debugging is not enabled. You can also set it to `syslog` to send the debug messages to syslog, or `none` to disable this log. For more information check [Tracing Options](/daemon/README.md#debugging). |
+| debug flags | `0x0000000000000000` | Bitmap of debug options to enable. For more information check [Tracing Options](https://github.com/netdata/netdata/blob/master/daemon/README.md#debugging). |
+| debug | `/var/log/netdata/debug.log` | The filename to save debug information. This file will not be created if debugging is not enabled. You can also set it to `syslog` to send the debug messages to syslog, or `none` to disable this log. For more information check [Tracing Options](https://github.com/netdata/netdata/blob/master/daemon/README.md#debugging). |
| error | `/var/log/netdata/error.log` | The filename to save error messages for Netdata daemon and all plugins (`stderr` is sent here for all Netdata programs, including the plugins). You can also set it to `syslog` to send the errors to syslog, or `none` to disable this log. |
| access | `/var/log/netdata/access.log` | The filename to save the log of web clients accessing Netdata charts. You can also set it to `syslog` to send the access log to syslog, or `none` to disable this log. |
| facility | `daemon` | A facility keyword is used to specify the type of system that is logging the message. |
@@ -163,9 +168,9 @@ The multiplication of all the **enabled** tiers `dbengine tier N update every i
This section controls the general behavior of the health monitoring capabilities of Netdata.
Specific alarms are configured in per-collector config files under the `health.d` directory. For more info, see [health
-monitoring](/health/README.md).
+monitoring](https://github.com/netdata/netdata/blob/master/health/README.md).
-[Alarm notifications](/health/notifications/README.md) are configured in `health_alarm_notify.conf`.
+[Alarm notifications](https://github.com/netdata/netdata/blob/master/health/notifications/README.md) are configured in `health_alarm_notify.conf`.
| setting | default | info |
|:----------------------------------------------:|:------------------------------------------------:|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
@@ -175,10 +180,11 @@ monitoring](/health/README.md).
| run at least every seconds | `10` | Controls how often all alarm conditions should be evaluated. |
| postpone alarms during hibernation for seconds | `60` | Prevents false alarms. May need to be increased if you get alarms during hibernation. |
| rotate log every lines | 2000 | Controls the number of alarm log entries stored in `<lib directory>/health-log.db`, where `<lib directory>` is the one configured in the [\[global\] section](#global-section-options) |
+| enabled alarms | * | Defines which alarms to load from both user and stock directories. This is a [simple pattern](https://github.com/netdata/netdata/blob/master/libnetdata/simple_pattern/README.md) list of alarm or template names. Can be used to disable specific alarms. For example, `enabled alarms = !oom_kill *` will load all alarms except `oom_kill`. |
### [web] section options
-Refer to the [web server documentation](/web/server/README.md)
+Refer to the [web server documentation](https://github.com/netdata/netdata/blob/master/web/server/README.md)
### [plugins] section options
@@ -198,7 +204,7 @@ Additionally, there will be the following options:
### [registry] section options
To understand what this section is and how it should be configured, please refer to
-the [registry documentation](/registry/README.md).
+the [registry documentation](https://github.com/netdata/netdata/blob/master/registry/README.md).
## Per-plugin configuration
@@ -206,7 +212,7 @@ The configuration options for plugins appear in sections following the pattern `
### Internal plugins
-Most internal plugins will provide additional options. Check [Internal Plugins](/collectors/README.md) for more
+Most internal plugins will provide additional options. Check [Internal Plugins](https://github.com/netdata/netdata/blob/master/collectors/README.md) for more
information.
Please note, that by default Netdata will enable monitoring metrics for disks, memory, and network only when they are
@@ -222,7 +228,7 @@ External plugins will have only 2 options at `netdata.conf`:
| setting | default | info |
|:---------------:|:--------------------------------------------:|:------------------------------------------------------------------------------------------------------------------------------------------------------|
-| update every | the value of `[global].update every` setting | The frequency in seconds the plugin should collect values. For more information check the [performance guide](/docs/guides/configure/performance.md). |
+| update every | the value of `[global].update every` setting | The frequency in seconds the plugin should collect values. For more information check the [performance guide](https://github.com/netdata/netdata/blob/master/docs/guides/configure/performance.md). |
| command options | - | Additional command line options to pass to the plugin. | |
External plugins that need additional configuration may support a dedicated file in `/etc/netdata`. Check their
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 19:02:36 +0000