Grafana is

Grafana is an open-source analytics and visualization platform used to monitor and analyze time-series data from various sources. It allows users to create customizable dashboards and visualizations to gain insights from data.

Key features of Grafana include:

  1. Data source integration: Grafana can connect to a wide range of data sources such as databases (MySQL, PostgreSQL, etc.), cloud services (Amazon Web Services, Google Cloud Platform), and monitoring systems (Prometheus, InfluxDB, Elasticsearch, etc.).

  2. Dashboard creation: Grafana provides a user-friendly interface for creating interactive dashboards. Users can add various panels like graphs, tables, and gauges to visualize their data. Dashboards can be customized with different themes, annotations, and templating options.

  3. Querying and visualization: Grafana supports a query editor where users can write queries in different query languages, such as PromQL for Prometheus or SQL for databases. The queried data can be visualized using a wide range of options like line graphs, bar charts, heatmaps, and more.

  4. Alerting and notifications: Grafana allows users to set up alerts based on predefined conditions or thresholds. When these conditions are met, Grafana can send notifications via various channels like email, Slack, or PagerDuty.

  5. Plugin ecosystem: Grafana has a rich ecosystem of plugins that extend its functionality. Users can install plugins to add additional data sources, panel types, or integrations with other systems.

Grafana is commonly used in DevOps and IT operations to monitor and visualize system metrics, application performance, and infrastructure health. It is widely adopted in industries such as software development, cloud computing, IoT, and data analytics.

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Using the MinIO API via curl

Using the MinIO API via curl is straightforward, as MinIO is compatible with Amazon S3 API, so most commands follow a similar syntax. Here’s a guide on how to use curl with the MinIO API for some common operations like uploading, downloading, and managing objects. Prerequisites Access Key and Secret Key : Obtain your MinIO Access Key and Secret Key. MinIO Endpoint : Know your MinIO server endpoint, e.g., http://localhost:9000 . Bucket : You may need an existing bucket name, or create a new one using the commands below. Authentication Header For requests to work with MinIO, you need to include authentication in the headers. MinIO uses AWS Signature Version 4 for signing requests. Common Examples 1. List Buckets To list all buckets in your MinIO account, use: curl -X GET \ - -url "http://localhost:9000/" \ - H "Authorization: AWS <AccessKey>:<Signature>" 2. Create a Bucket To create a new bucket, use: curl -X PUT \ - -url "htt...
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How to split a list into chunks of 100 items in JavaScript, 자바스크립트 리스트 쪼개기

To split a list into chunks of 100 items in JavaScript, you can create a function that loops through the list and slices it into smaller subarrays of size 100. Here’s how you can do it: Example Code: function splitListBy100( array ) { const chunkSize = 100 ; const result = []; for ( let i = 0 ; i < array .length; i += chunkSize) { result .push( array .slice(i, i + chunkSize)); } return result ; } // Example usage: const myArray = [... Array ( 350 ).keys()]; // Creating an array of numbers from 0 to 349 const chunks = splitListBy100(myArray); console.log(chunks); Explanation: chunkSize : Defines the size of each chunk, which in this case is 100. for loop : Iterates over the array, incrementing the index by 100 each time. array.slice(i, i + chunkSize) : Extracts a chunk from the array starting from index i and ending at i + chunkSize . result.push() : Adds the chunk to the result array. The function returns an array of arrays (...
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HTML Inline divisions at one row by Tailwind

To arrange a **variable number of inline ` ` elements in a row** using **Tailwind CSS**, you can utilize several approaches, depending on your layout needs. Below are some common methods to align multiple divs in a row: ### 1. **Using Flexbox (`flex`)** Tailwind's `flex` utilities provide a straightforward way to align a variable number of ` ` elements inline in a row. Flexbox will ensure that they stay in a row, wrapping if necessary. #### **Example Using Flexbox** ```html Div 1 Div 2 Div 3 Div 4 ``` #### **Explanation:** - `flex`: Puts the child elements (the divs) in a row. - `flex-wrap`: Ensures that if there are too many divs to fit in one row, they will wrap to the next line. - `space-x-4`: Adds horizontal spacing between the divs (adjust as needed). ### 2. **Using Grid (`grid`)** Another way to align divs in a row is by using Tailwind's `grid` utilities. Grid layouts are very flexible and allow control over the number of columns. #### **Example Using ...
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Boilerplate for typescript server programing

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가속도 & 속도

F = ma 에서 가속도(( a ))는 속도(( v ))의 시간(( t ))에 대한 미분이므로, 수식으로 표현하면 다음과 같습니다. \[a = \frac{dv}{dt}\] 또한, 속도(( v ))는 위치(( x ))의 시간 미분이므로, 이를 포함하여 가속도를 표현하면 \[a = \frac{d}{dt} \left( \frac{dx}{dt} \right) = \frac{d^2 x}{dt^2}\] 즉, 가속도는 위치의 이阶 미분(두 번째 미분)입니다.
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Gradle multi-module project

In a Gradle multi-module project , it's common to define shared dependencies in the parent project (root project) to avoid duplication across modules. This structure allows child modules to inherit or access those dependencies. Below are some best practices on how to correctly share dependencies between parent and child modules in a multi-module Gradle project . Project Structure Example multi-module-project/ ├── build .gradle .kts (Parent/root project) ├── settings .gradle .kts ├── module-a/ │ └── build .gradle .kts ├── module-b/ │ └── build .gradle .kts Step 1: Configure settings.gradle.kts In a multi-module project, the settings.gradle.kts file should declare all the modules that are part of the build. // settings.gradle.kts rootProject .name = "multi-module-project" // Include child modules include ( "module-a" , "module-b" ) Step 2: Define Shared Dependencies in the Parent build.gradle.kts The root build.gradle.kts ca...
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How to checkout branch of remote git, 깃 리모트 브랜치 체크아웃

To check out a branch from a remote Git repository, you can follow these steps: 1. Fetch the remote branches First, ensure that your local repository is aware of the remote branches by using git fetch . This updates your local references to the remote branches. git fetch origin 2. Check out the remote branch Once the remote branches are fetched, you can check out the desired branch using git checkout -b and specifying the remote branch. Command: git checkout -b < local -branch- name > origin/<remote-branch- name > Explanation: <local-branch-name> : The name you want to give to your local branch. origin/<remote-branch-name> : Refers to the branch on the remote called origin (which is the default name for the main remote repository) and the branch you want to check out. Example: If the remote branch is called feature-branch and you want to create a local branch with the same name, you would run: git checkout -b feature -branch origin / feature -...
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CDPEvents in puppeteer

In Puppeteer , CDPEvents refers to events emitted by the Chrome DevTools Protocol (CDP) . Puppeteer leverages CDP to interact with and control a Chromium-based browser. CDP provides detailed, low-level access to browser internals, such as network traffic, console logs, page lifecycle events, and more. You can listen to these CDP events through Puppeteer’s API to monitor or intercept browser activity. How to Listen for CDP Events in Puppeteer Enable the Required CDP Domain: Some events require enabling a particular domain (e.g., 'Network' , 'Page' , 'Runtime' ). Use page._client() to Access the CDP Session: Although it’s a bit lower-level, Puppeteer allows access to DevTools through the page._client() API. Example: Listening for Network Requests This example demonstrates how to intercept and log network requests using CDP. const puppeteer = require( 'puppeteer' ); ( async () => { const browser = await puppeteer.launch({ headless...
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Sparse encoder

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Reactjs datetime range picker

To create a datetime range picker in React, you can use a library such as react-datetime-range-picker . This library provides a customizable date and time range picker component that you can easily integrate into your React application. Here's an example of how you can use it: Install the library using npm or yarn: npm install react-datetime- range -picker Import the necessary components into your React component: import React, { useState } from 'react' ; import DateTimeRangePicker from 'react-datetime-range-picker' ; Create a state to hold the selected date and time range: const [selectedRange, setSelectedRange] = useState({ startDate: null , endDate: null }); Render the DateTimeRangePicker component and handle the selection changes: ```jsx const handleRangeChange = (range) => { setSelectedRange(range); }; return ( ); ``` In the example above, the DateTimeRangePicker component is rendered with the onChange event handler and th...
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