mirror of
https://github.com/prometheus/prometheus.git
synced 2024-11-19 03:54:06 -08:00
54dfee02b2
* move codemirror-promql as a prometheus web module Signed-off-by: Augustin Husson <husson.augustin@gmail.com> * remove unecessary file for the codemirror module Signed-off-by: Augustin Husson <husson.augustin@gmail.com> * change license for Apache Signed-off-by: Augustin Husson <husson.augustin@gmail.com> * fix codemirror build Signed-off-by: Augustin Husson <husson.augustin@gmail.com>
266 lines
9.6 KiB
Markdown
266 lines
9.6 KiB
Markdown
CodeMirror-promql
|
|
=================
|
|
[](https://circleci.com/gh/prometheus-community/codemirror-promql) [](./LICENSE)
|
|
[](https://www.npmjs.org/package/codemirror-promql) [](https://codecov.io/gh/prometheus-community/codemirror-promql)
|
|
|
|
## Overview
|
|
|
|
This project provides a mode for [CodeMirror Next](https://codemirror.net/6) that handles syntax highlighting, linting
|
|
and autocompletion for PromQL ([Prometheus Query Language](https://prometheus.io/docs/introduction/overview/)).
|
|
|
|
### Installation
|
|
|
|
This mode is available as a npm package:
|
|
|
|
```bash
|
|
npm install --save codemirror-promql
|
|
```
|
|
|
|
**Note:** You will have to manually install different packages that are part
|
|
of [CodeMirror Next](https://codemirror.net/6), as they are a peer dependency to this package. Here are the different
|
|
packages you need to install:
|
|
|
|
* **@codemirror/autocomplete**
|
|
* **@codemirror/highlight**
|
|
* **@codemirror/language**
|
|
* **@codemirror/lint**
|
|
* **@codemirror/state**
|
|
* **@codemirror/view**
|
|
|
|
```bash
|
|
npm install --save @codemirror/autocomplete @codemirror/highlight @codemirror/language @codemirror/lint @codemirror/state @codemirror/view
|
|
```
|
|
|
|
**Note 2**: that's the minimum required to install the lib. You would probably need to install as well the dependency
|
|
**@codemirror/basic-setup** to ease the setup of codeMirror itself:
|
|
|
|
```bash
|
|
npm install --save @codemirror/basic-setup
|
|
```
|
|
|
|
### Playground
|
|
|
|
[Here](https://codemirror-promql.netlify.app/) you have a playground available that is deployed from the latest commit
|
|
available on the `master` branch.
|
|
|
|
Here is a short preview of it looks like currently:
|
|
|
|
|
|
|
|
## Usage
|
|
|
|
As the setup of the PromQL language can a bit tricky in CMN, this lib provides a class `PromQLExtension`
|
|
which is here to help you to configure the different extensions we aim to provide.
|
|
|
|
### Default setup
|
|
|
|
If you want to enjoy about the different features provided without taking too much time to understand how to configure
|
|
them, then the easiest way is this one:
|
|
|
|
```typescript
|
|
import { PromQLExtension } from 'codemirror-promql';
|
|
import { basicSetup } from '@codemirror/basic-setup';
|
|
import { EditorState } from '@codemirror/state';
|
|
import { EditorView } from '@codemirror/view';
|
|
|
|
const promQL = new PromQLExtension()
|
|
new EditorView({
|
|
state: EditorState.create({
|
|
extensions: [basicSetup, promQL.asExtension()],
|
|
}),
|
|
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
|
|
// tslint:disable-next-line:no-non-null-assertion
|
|
parent: document.getElementById('editor')!,
|
|
});
|
|
```
|
|
|
|
Using the default setup will activate:
|
|
|
|
* syntax highlighting
|
|
* an offline autocompletion that will suggest PromQL keywords such as functions / aggregations, depending on the
|
|
context.
|
|
* an offline linter that will display PromQL syntax errors (which is closer to what Prometheus returns)
|
|
|
|
### Deactivate autocompletion - linter
|
|
|
|
In case you would like to deactivate the linter and/or the autocompletion it's simple as that:
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().activateLinter(false).activateCompletion(false) // here the linter and the autocomplete are deactivated
|
|
```
|
|
|
|
### Linter
|
|
|
|
There is no particular configuration today for the linter. Feel free to file an issue if you have some use cases that
|
|
would require configurability.
|
|
|
|
### Autocompletion
|
|
|
|
The autocompletion feature provides multiple different parameters that can be used to adapt this lib to your
|
|
environment.
|
|
|
|
#### maxMetricsMetadata
|
|
|
|
`maxMetricsMetadata` is the maximum number of metrics in Prometheus for which metadata is fetched. If the number of
|
|
metrics exceeds this limit, no metric metadata is fetched at all.
|
|
|
|
By default, the limit is 10 000 metrics.
|
|
|
|
Use it cautiously. A high value of this limit can cause a crash of your browser due to too many data fetched.
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().setComplete({ maxMetricsMetadata: 10000 })
|
|
```
|
|
|
|
#### Connect the autocompletion extension to a remote Prometheus server
|
|
|
|
Connecting the autocompletion extension to a remote Prometheus server will provide autocompletion of metric names, label
|
|
names, and label values.
|
|
|
|
##### Use the default Prometheus client
|
|
|
|
###### Prometheus URL
|
|
|
|
If you want to use the default Prometheus client provided by this lib, you have to provide the url used to contact the
|
|
Prometheus server.
|
|
|
|
Note: this is the only mandatory parameter in case you want to use the default Prometheus client. Without this
|
|
parameter, the rest of the config will be ignored, and the Prometheus client won't be initialized.
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().setComplete({ remote: { url: 'https://prometheus.land' } })
|
|
```
|
|
|
|
###### Override FetchFn
|
|
|
|
In case your Prometheus server is protected and requires a special HTTP client, you can override the function `fetchFn`
|
|
that is used to perform any required HTTP request.
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().setComplete({ remote: { fetchFn: myHTTPClient } })
|
|
```
|
|
|
|
###### Duration to use for looking back when retrieving metrics / labels
|
|
|
|
If you are a bit familiar with the Prometheus API, you are aware that you can pass a time interval that is used to tell
|
|
to Prometheus which period of time you are looking for when retrieving metadata (like metrics / labels).
|
|
|
|
In case you would like to provide your own duration, you can override the variable `lookbackInterval`. By default, the
|
|
value is `12 * 60 * 60 * 1000` (12h). The value must be defined in **milliseconds**.
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().setComplete({ remote: { lookbackInterval: 12 * 60 * 60 * 1000 } })
|
|
```
|
|
|
|
###### Error Handling
|
|
|
|
You can set up your own error handler to catch any HTTP error that can occur when the PrometheusClient is contacting
|
|
Prometheus.
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().setComplete({ remote: { httpErrorHandler: (error: any) => console.error(error) } })
|
|
```
|
|
|
|
###### HTTP method used
|
|
|
|
By default, the Prometheus client will use the HTTP method `POST` when contacting Prometheus for the
|
|
endpoints `/api/v1/labels` and `/api/v1/series`.
|
|
|
|
You can change it to use the HTTP method `GET` if you prefer.
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().setComplete({ remote: { httpMethod: 'GET' } })
|
|
```
|
|
|
|
###### Cache
|
|
|
|
The default client has an embedded cache that is used to store the different metrics and labels retrieved from a remote
|
|
Prometheus server.
|
|
|
|
###### Max Age
|
|
|
|
The data are stored in the cache for a limited amount of time defined by the variable `maxAge` which is by default 5
|
|
minutes. The value must be defined in **milliseconds**.
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().setComplete({ remote: { cache: { maxAge: 5 * 60 * 1000 } } })
|
|
```
|
|
|
|
###### Initial Metric List
|
|
|
|
The cache can be initialized with a list of metric names. It is useful when you already have the list of the metrics
|
|
somewhere else in your application, and you would like to share this list with the embedded Prometheus client
|
|
of `codemirror-promql`.
|
|
|
|
Note: keep in mind that this list will be kept into the embedded Prometheus client until the time defined by `maxAge`.
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().setComplete({
|
|
remote: {
|
|
cache: {
|
|
initialMetricList: [
|
|
'ALERTS',
|
|
'ALERTS_FOR_STATE',
|
|
'alertmanager_alerts',
|
|
'alertmanager_alerts_invalid_total',
|
|
'alertmanager_alerts_received_total',
|
|
]
|
|
}
|
|
}
|
|
})
|
|
```
|
|
|
|
##### Override the default Prometheus client
|
|
|
|
In case you are not satisfied by our default Prometheus client, you can still provide your own. It has to implement the
|
|
interface [PrometheusClient](https://github.com/prometheus-community/codemirror-promql/blob/master/src/lang-promql/client/prometheus.ts#L111-L117)
|
|
.
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().setComplete({ remote: { prometheusClient: MyPrometheusClient } })
|
|
```
|
|
|
|
#### Provide your own implementation of the autocompletion
|
|
|
|
In case you would like to provide you own implementation of the autocompletion, you can simply do it like that:
|
|
|
|
```typescript
|
|
const promQL = new PromQLExtension().setComplete({ completeStrategy: myCustomImpl })
|
|
```
|
|
|
|
Note: In case this parameter is provided, then the rest of the configuration is ignored.
|
|
|
|
### Example
|
|
|
|
* The development [app](./src/app) can give you an example of how to use it with no TS Framework.
|
|
* [ReactJS example](https://github.com/prometheus/prometheus/blob/431ea75a11ca165dad9dd5d629b3cf975f4c186b/web/ui/react-app/src/pages/graph/CMExpressionInput.tsx)
|
|
* [Angular example](https://github.com/perses/perses/blob/28b3bdac88b0ed7a4602f9c91106442eafcb6c34/internal/api/front/perses/src/app/project/prometheusrule/promql-editor/promql-editor.component.ts)
|
|
|
|
## Contributions
|
|
|
|
Any contribution or suggestion would be really appreciated. Feel free
|
|
to [file an issue](https://github.com/prometheus-community/codemirror-promql/issues)
|
|
or [send a pull request](https://github.com/prometheus-community/codemirror-promql/pulls).
|
|
|
|
## Development
|
|
|
|
In case you want to contribute and change the code by yourself, run the following commands:
|
|
|
|
To install all dependencies:
|
|
|
|
```
|
|
npm install
|
|
```
|
|
|
|
To start the web server:
|
|
|
|
```
|
|
npm start
|
|
```
|
|
|
|
This should create a tab in your browser with the development app that contains CodeMirror Next with the PromQL plugin.
|
|
|
|
## License
|
|
|
|
[MIT](./LICENSE)
|