Проверка yml файла linux

Top 5 Tools to Validate YAML Files

YAML Ain’t Markup Language (or YAML™) is a human-friendly, easily readable data language widely used with or alongside almost all programming mediums. It is designed around a standard formatted layout useful for creating configuration files that readily integrate across multiple development environments. It is also valuable for managing concurrent data as it includes the ability to employ Unicode printable characters.

YAML Format

The structure of YAML is indicated through indentations using one or more spaces. A single YAML file can contain multiple documents in a logical sequence. Item values are designated by whitespaces, hyphens, pipes, curly and square brackets, number signs, question marks, single or double quotes, backslashes, periods, ampersands, asterisks, and various other special characters. It can contain multiple commands but does not execute those commands itself. The related language called on accomplishes that task.

YAML has multiple formatting requirements to ensure it is compatible with the platform where it is employed. Any file designated as a YAML file should have the appended *.yaml or *.yml file extension. Additionally, YAML formatting prohibits tabs from being used. This restriction is primarily due to the differences in code editors and other development tools.

Available Platforms

The YAML standard is used in over 20 different languages or other related projects. Some of these include:

Features

YAML regards markup language with a vital construct to distinguish the data-oriented language within the document markup. Noted below are the YAML design goals:

• Data is portable between programming languages.
• Provides a consistent and reproducible data model.
• Easy to use and implement in various languages.
• Supports single, one-pass directional processing of data within.
• Users can validate YAML from within the command line or using a software program.

YAML Example

Why Validate YAML?

It is essential to ensure a file is syntactically correct when working with YAML files. The strict nature of the YAML language requires formatting to be exact when laying out and defining a file’s data and commands. Typically, developers use a linter in a software development program to analyze the file during the creation process. The linter improves and corrects the code’s quality by verifying and identifying bugs, programming errors, style errors, or other odd formatting issues. It also checks YAML files to ensure they adhere to best formatting practices.

YAML Validation in IDEs

An IDE is an application that allows developers to write and design software. Most modern IDEs either have built-in support or plugin support that users can install to enable a YAML file’s linting. Here are the top five platforms:

• Microsoft Visual Studio/VSCodium — This well-known IDE uses a RedHat-based linting tool that works well to validate YAML files.
• Eclipse IDE — Two popular plugins for Eclipse use the YEdit and Yaml editor to manipulate and check YAML files.
• Android Studio — This IDE software by JetBrains is one of three IDEs on our list of the most popular development environments. JetBrains offers multiple plugins that are useful for working with YAML files.
• PyCharm — Has many plugins as well as an internal method to work with YAML files. Users can find these settings below:
  • Windows — File | Settings | Editor | Code Style | YAML for Windows and
  • Linux — PyCharm | Preferences | Editor | Code Style | YAML for macOS.

  YAML Online Validators

  In addition to the software IDEs, multiple online YAML validators exist which perform the same or similar functions as a linter within a software development application. Here are several of the most popular ones.

  Best Practices

  1. Always utilize monospaced fonts when working on a YAML file. This font allows us to quickly spot indentation errors, which can prevent our file from being validated.
  2. Use a code editor. Nothing works better at providing a fast and smooth interface when writing YAML files. Because many IDEs employ either an internal or plugin-based linting function, this makes validating our files that much easier.
  3. If an IDE is not available, employ a linter.
  4. Never use the default TAB character in a YAML file. Users should only employ the SPACE character. If required, users can configure most modern IDEs to have tabs to behave like spaced characters.
  5. Only use UTF-8 encoding when saving a YAML file. This provides the best use of the full set of printable Unicode characters.
  6. Whitespace matters in YAML! YAML uses literal space characters (again, not tabs) to define its structure.
  7. All YAML files should begin with three dashes (—) and end with an ellipsis (. ). This is a part of the standard YAML formatting and indicates the beginning and end of a document.
  8. The most typical YAML characters are colons, dashes, and pound symbols, but users can employ a wide range of characters to accomplish many tasks.
  9. Users can use line comments nearly everywhere.
  10. Use YAML as a Config file. Searching through code to modify a parameter is never fun.
  11. If struggling to write a YAML file, try writing it in Python and then convert it using the pyyaml library to convert the code.
  12. Never store sensitive data in a YAML file.
  13. If unsure, use the YAML reference.

  Conclusion

  YAML or YAML Ain’t Markup Language is a human-friendly, easily readable data language widely used in almost all programming mediums today. It uses an indented structure to encompass multiple record types read a logical sequence. YAML requires a structured format to ensure it is cross-compatible with different programming languages. Because YAML is platform-agnostic, developers can utilize it across multiple mediums. Its many uses continue to grow and evolve as new technologies emerge, which require independent and separate configuration files.

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  Проверка yml файла linux

  YAML ain’t markup language. YAML is a concise data serialization language, which is typically considered easier to read than the more verbose JSON or XML. It is most often used in configuration files of servers and software applications. Clark Evans proposed the spec in 2001 as the result of an effort to simplify XML. According to his resume , at the time he conceived of YAML he was working with Python, which likely influenced the syntax of YAML as an indentation-based language.

  Advantages of YAML

  • Concise syntax eliminates many syntax errors common in other markup languages, such as missing closing brackets
  • YAML allows users to add comments to their data, which can be useful for documentation or explaining certain parts of the data. JSON does not support comments, so any comments added to a JSON file would be treated as part of the data.
  • YAML allows easy reuse of redundant configuration simply by creating a named anchor with an «&» and referencing with «*»
  • YAML allows users to include multiple documents within a single file, separated by ‘—‘. This can be useful for organizing data or separating different sections of a configuration file.
  • A less commonly used advantage is that YAML allows custom data typing, when the core or advanced data types are insufficient

  About YAML Checker

  YAML checker aims to be the YAML validator of choice for developers. The tool provides a simple interface to input YAML content (just copy + paste!), view your content with syntax highlighting, and instantly display any issues with your YAML along with a line number causing the problem. Once you have fixed your YAML, the validator will instantly update to indicate that your input is free of errors with a green success message.

  YAML Alternatives

  • JSON (JavaScript Object Notation)
  • TOML (A minimal configuration file format)
  • JSON5 (A proposed extension to JSON)
  • BSON (Binary JSON)
  • XML (Extensible Markup Language)
  • CSON (CoffeeScript Object Notation)
  • CSV (Comma Separated Values)
  • Protocol Buffers
  • MessagePack (An efficient binary serialization format)

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  ☸️ Как проверить YAML-файлы Kubernetes на предмет корректности

  

  В связи с множеством динамических сущностей и таким количеством точек входа список того, что может пойти не так, ошеломляет.

  Если вы не создаете манифесты подов и контейнеров, соответствующие стандартным рекомендациям, вероятность ошибки возрастает в геометрической прогрессии.

  Вот почему так важно писать файлы YAML как можно более аккуратно.

  Когда в работе задействовано большое количество элементов, каждый из которых настраивает различные ресурсы, может быть очень трудно сделать все правильно.

  Вот почему вам следует воспользоваться доступными инструментами, чтобы не писать манифесты, противоречащие лучшим практикам.

  Один из способов проверить эти файлы YAML – использовать kube-linter.

  Kube-linter – это инструмент статического анализа, который проверяет ваши YAML-файлы Kubernetes, и позволяет вам убедиться, что настроенные приложения соответствуют лучшим практикам.

  Я покажу вам процесс установки kube-linter на Ubuntu.

  После установки мы рассмотрим процесс «линтинга» примера YAML-файла.

  Что вам понадобится

  Инструмент kube-linter можно установить на Linux или macOS.

  Я собираюсь провести демонстрацию на Linux.

  Вам не нужно устанавливать это программное обеспечение в кластере Kubernetes, так как вы всегда можете «проверить» свои файлы YAML на отдельном компьютере, а затем переместить их в кластер Kubernetes для развертывания.

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  README.rst

  yamllint does not only check for syntax validity, but for weirdnesses like key repetition and cosmetic problems such as lines length, trailing spaces, indentation, etc.

  Written in Python (compatible with Python 3 only).

  

  Using pip, the Python package manager:

  pip install --user yamllint

  yamllint is also packaged for all major operating systems, see installation examples ( dnf , apt-get . ) in the documentation.

  # Lint one or more files yamllint my_file.yml my_other_file.yaml .

  # Lint all YAML files in a directory yamllint .

  # Use a pre-defined lint configuration yamllint -d relaxed file.yaml # Use a custom lint configuration yamllint -c /path/to/myconfig file-to-lint.yaml

  # Output a parsable format (for syntax checking in editors like Vim, emacs. ) yamllint -f parsable file.yaml

  Here is a yamllint configuration file example:

  extends: default rules: # 80 chars should be enough, but don't fail if a line is longer line-length: max: 80 level: warning # don't bother me with this rule indentation: disable

  Within a YAML file, special comments can be used to disable checks for a single line:

  This line is waaaaaaaaaay too long # yamllint disable-line

  # yamllint disable rule:colons - Lorem : ipsum dolor : sit amet, consectetur : adipiscing elit # yamllint enable

  Specific files can be ignored (totally or for some rules only) using a .gitignore -style pattern:

  # For all rules ignore: | *.dont-lint-me.yaml /bin/ !/bin/*.lint-me-anyway.yaml rules: key-duplicates: ignore: | generated *.template.yaml trailing-spaces: ignore: | *.ignore-trailing-spaces.yaml /ascii-art/*

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