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authorDaniel Baumann <daniel.baumann@progress-linux.org>2021-05-19 12:33:38 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2021-05-19 12:33:59 +0000
commit1ee0c09c5742557e037df5421ca62abddb90ae22 (patch)
tree71c0fa48bb6d31d036c9badd7e038527f90d1a73 /health/REFERENCE.md
parentReleasing debian version 1.30.1-1. (diff)
downloadnetdata-1ee0c09c5742557e037df5421ca62abddb90ae22.tar.xz
netdata-1ee0c09c5742557e037df5421ca62abddb90ae22.zip
Merging upstream version 1.31.0.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'health/REFERENCE.md')
-rw-r--r--health/REFERENCE.md91
1 files changed, 85 insertions, 6 deletions
diff --git a/health/REFERENCE.md b/health/REFERENCE.md
index bc5f40ccd..5ea6b7c5d 100644
--- a/health/REFERENCE.md
+++ b/health/REFERENCE.md
@@ -47,9 +47,10 @@ to the same chart, Netdata will use the alarm.
Netdata parses the following lines. Beneath the table is an in-depth explanation of each line's purpose and syntax.
-- The `on` and `lookup` lines are **always required**.
-- Each entity **must** have one of the following lines: `calc`, `warn`, or `crit`.
- The `alarm` or `template` line must be the first line of any entity.
+- The `on` line is **always required**.
+- The `every` line is **required** if not using `lookup`.
+- Each entity **must** have at least one of the following lines: `lookup`, `calc`, `warn`, or `crit`.
- A few lines use space-separated lists to define how the entity behaves. You can use `*` as a wildcard or prefix with
`!` for a negative match. Order is important, too! See our [simple patterns docs](../libnetdata/simple_pattern/) for
more examples.
@@ -58,10 +59,14 @@ Netdata parses the following lines. Beneath the table is an in-depth explanation
| --------------------------------------------------- | --------------- | ------------------------------------------------------------------------------------- |
| [`alarm`/`template`](#alarm-line-alarm-or-template) | yes | Name of the alarm/template. |
| [`on`](#alarm-line-on) | yes | The chart this alarm should attach to. |
+| [`class`](#alarm-line-class) | no | The general classification of the alarm. |
+| [`component`](#alarm-line-component) | no | Specify the component of the class of the alarm. |
+| [`type`](#alarm-line-type) | no | The type of error the alarm monitors. |
| [`os`](#alarm-line-os) | no | Which operating systems to run this chart. |
| [`hosts`](#alarm-line-hosts) | no | Which hostnames will run this alarm. |
| [`plugin`](#alarm-line-plugin) | no | Restrict an alarm or template to only a certain plugin. |
| [`module`](#alarm-line-module) | no | Restrict an alarm or template to only a certain module. |
+| [`charts`](#alarm-line-charts) | no | Restrict an alarm or template to only certain charts. |
| [`families`](#alarm-line-families) | no | Restrict a template to only certain families. |
| [`lookup`](#alarm-line-lookup) | yes | The database lookup to find and process metrics for the chart specified through `on`. |
| [`calc`](#alarm-line-calc) | yes (see above) | A calculation to apply to the value found via `lookup` or another variable. |
@@ -72,7 +77,7 @@ Netdata parses the following lines. Beneath the table is an in-depth explanation
| [`exec`](#alarm-line-exec) | no | The script to execute when the alarm changes status. |
| [`delay`](#alarm-line-delay) | no | Optional hysteresis settings to prevent floods of notifications. |
| [`repeat`](#alarm-line-repeat) | no | The interval for sending notifications when an alarm is in WARNING or CRITICAL mode. |
-| [`option`](#alarm-line-option) | no | Add an option to not clear alarms. |
+| [`options`](#alarm-line-options) | no | Add an option to not clear alarms. |
| [`host labels`](#alarm-line-host-labels) | no | List of labels present on a host. |
The `alarm` or `template` line must be the first line of any entity.
@@ -129,6 +134,67 @@ You're interested in what comes after the comma: `disk.io`. That's the name of t
If you create a template using the `disk.io` context, it will apply an alarm to every disk available on your system.
+#### Alarm line `class`
+
+Specify the classification of the alarm or template.
+
+Class can be used to indicate the broader area of the system that the alarm applies to. For example, under the general `Database` class, you can group together alarms that operate on various database systems, like `MySQL`, `CockroachDB`, `CouchDB` etc. Example:
+
+```yaml
+class: Database
+```
+<details>
+<summary>Netdata's stock alarms use the following `class` attributes by default, but feel free to adjust for your own requirements.</summary>
+
+| Class | Description |
+| ------------------------ | ------------------------------------------------------------------------------------------------ |
+| Ad Filtering | Services related to Ad Filtering (like pi-hole) |
+| Certificates | Certificates monitoring related |
+| Cgroups | Alerts for cpu and memory usage of control groups |
+| Computing | Alerts for shared computing applications (e.g. boinc) |
+| Containers | Container related alerts (e.g. docker instances) |
+| Database | Database systems (e.g. MySQL, Postgress, etc) |
+| Data Sharing | Used to group together alerts for data sharing applications |
+| DHCP | Alerts for dhcp related services |
+| DNS | Alerts for dns related services |
+| Kubernetes | Alerts for kubernetes nodes monitoring |
+| KV Storage | Key-Value pairs services alerts (e.g. memcached) |
+| Linux | Services specific to Linux (e.g. systemd) |
+| Messaging | Alerts for message passing services (e.g. vernemq) |
+| Netdata | Internal Netdata components monitoring |
+| Other | Use as a general class of alerts |
+| Power Supply | Alerts from power supply related services (e.g. apcupsd) |
+| Search engine | Alerts for search services (e.g. elasticsearch) |
+| Storage | Class for alerts dealing with storage services (storage devices typically live under `System`) |
+| System | General system alarms (e.g. cpu, network, etc.) |
+| Virtual Machine | Virtual Machine software |
+| Web Proxy | Web proxy software (e.g. squid) |
+| Web Server | Web server software (e.g. Apache, ngnix, etc.) |
+| Windows | Alerts for monitor of wmi services |
+
+</details>
+
+If an alarm configuration is missing the `class` line, its value will default to `Unknown`.
+
+#### Alarm line `component`
+
+Component can be used to narrow down what the previous `class` value specifies for each alarm or template. Continuing from the previous example, `component` might include `MySQL`, `CockroachDB`, `MongoDB`, all under the same `Database` classification. Example:
+
+```yaml
+component: MySQL
+```
+As with the `class` line, if `component` is missing from the configuration, its value will default to `Unknown`.
+
+#### Alarm line `type`
+
+This indicates the type of error (or general problem area) that the alarm or template applies to. For example, `Latency` can be used for alarms that trigger on latency issues in network interfaces, web servers, or database systems. Example:
+
+```yaml
+type: Latency
+```
+
+`type` will also (as with `class` and `component`) default to `Unknown` if the line is missing from the alarm configuration.
+
#### Alarm line `os`
The alarm or template will be used only if the operating system of the host matches this list specified in `os`. The
@@ -177,6 +243,19 @@ plugin: python.d.plugin
module: isc_dhcpd
```
+#### Alarm line `charts`
+
+The `charts` line filters which chart this alarm should apply to. It is only available on entities using the
+[`template`](#alarm-line-alarm-or-template) line.
+The value is a space-separated list of [simple patterns](/libnetdata/simple_pattern/README.md). For
+example, a template that applies to `disk.svctm` (Average Service Time) context, but excludes the disk `sdb` from alarms:
+
+```yaml
+template: disk_svctm_alarm
+ on: disk.svctm
+ charts: !*sdb* *
+```
+
#### Alarm line `families`
The `families` line, used only alongside templates, filters which families within the context this alarm should apply
@@ -386,12 +465,12 @@ repeat: [off] [warning DURATION] [critical DURATION]
- `critical DURATION`: Defines the interval when the alarm is in CRITICAL state. Use `0s` to turn off the repeating
notification for CRITICAL mode.
-#### Alarm line `option`
+#### Alarm line `options`
-The only possible value for the `option` line is
+The only possible value for the `options` line is
```yaml
-option: no-clear-notification
+options: no-clear-notification
```
For some alarms we need compare two time-frames, to detect anomalies. For example, `health.d/httpcheck.conf` has an