10 KiB
Executable File
10 KiB
Executable File
HTTP Status Codes Table
| Status Code | Category | Description |
|---|---|---|
| 100 | Informational (1xx) | Continue: The client should continue with its request. |
| 101 | Informational (1xx) | Switching Protocols: Server is switching protocols. |
| 102 | Informational (1xx) | Processing (WebDAV): Server has received and is processing the request. |
| 200 | Success (2xx) | OK: The request was successful. |
| 201 | Success (2xx) | Created: The request was successful and a resource was created. |
| 202 | Success (2xx) | Accepted: The request has been accepted for processing. |
| 203 | Success (2xx) | Non-Authoritative Information: The server is a proxy, not the original. |
| 204 | Success (2xx) | No Content: The server successfully processed the request, but no content is returned. |
| 205 | Success (2xx) | Reset Content: The client should reset the view. |
| 206 | Success (2xx) | Partial Content: The server is delivering part of the resource (range requests). |
| 300 | Redirection (3xx) | Multiple Choices: Multiple options for the resource are available. |
| 301 | Redirection (3xx) | Moved Permanently: The resource has moved permanently to a new URI. |
| 302 | Redirection (3xx) | Found: The resource is temporarily at a different URI. |
| 303 | Redirection (3xx) | See Other: The response is at another URI. |
| 304 | Redirection (3xx) | Not Modified: The resource has not been modified since the last request. |
| 305 | Redirection (3xx) | Use Proxy: The requested resource is available only through a proxy. |
| 307 | Redirection (3xx) | Temporary Redirect: The resource resides temporarily at a different URI. |
| 308 | Redirection (3xx) | Permanent Redirect: The resource has moved permanently, and this URI should be used. |
| 400 | Client Errors (4xx) | Bad Request: The server could not understand the request due to invalid syntax. |
| 401 | Client Errors (4xx) | Unauthorized: Authentication is required and has failed. |
| 402 | Client Errors (4xx) | Payment Required: Reserved for future use. |
| 403 | Client Errors (4xx) | Forbidden: The request was understood but refuses to authorize it. |
| 404 | Client Errors (4xx) | Not Found: The resource could not be found. |
| 405 | Client Errors (4xx) | Method Not Allowed: The request method is not supported for the resource. |
| 406 | Client Errors (4xx) | Not Acceptable: The resource cannot produce content acceptable to the client. |
| 407 | Client Errors (4xx) | Proxy Authentication Required: The client must authenticate with the proxy first. |
| 408 | Client Errors (4xx) | Request Timeout: The server timed out waiting for the request. |
| 409 | Client Errors (4xx) | Conflict: The request could not be processed because of a conflict. |
| 410 | Client Errors (4xx) | Gone: The resource is no longer available. |
| 411 | Client Errors (4xx) | Length Required: The request did not specify the length. |
| 412 | Client Errors (4xx) | Precondition Failed: The preconditions set by the client were not met. |
| 413 | Client Errors (4xx) | Payload Too Large: The request is too large to process. |
| 414 | Client Errors (4xx) | URI Too Long: The URI provided was too long for the server to process. |
| 415 | Client Errors (4xx) | Unsupported Media Type: The media type of the request is not supported. |
| 416 | Client Errors (4xx) | Range Not Satisfiable: The client requested a portion that cannot be supplied. |
| 417 | Client Errors (4xx) | Expectation Failed: The server cannot meet the expectation of the request. |
| 418 | Client Errors (4xx) | I'm a teapot (RFC 2324): An April Fools' joke code. |
| 421 | Client Errors (4xx) | Misdirected Request: The request was directed at a wrong server. |
| 422 | Client Errors (4xx) | Unprocessable Entity (WebDAV): The request was well-formed but semantic errors exist. |
| 423 | Client Errors (4xx) | Locked (WebDAV): The resource being accessed is locked. |
| 424 | Client Errors (4xx) | Failed Dependency (WebDAV): A previous request failed, causing this one to fail. |
| 425 | Client Errors (4xx) | Too Early: The server is unwilling to process this request yet. |
| 426 | Client Errors (4xx) | Upgrade Required: The client needs to switch to a different protocol. |
| 428 | Client Errors (4xx) | Precondition Required: The server requires the request to be conditional. |
| 429 | Client Errors (4xx) | Too Many Requests: Too many requests sent in a given amount of time. |
| 431 | Client Errors (4xx) | Request Header Fields Too Large: The request's header fields are too large. |
| 451 | Client Errors (4xx) | Unavailable For Legal Reasons: The resource is unavailable for legal reasons. |
| 500 | Server Errors (5xx) | Internal Server Error: An unexpected server error occurred. |
| 501 | Server Errors (5xx) | Not Implemented: The server lacks the ability to fulfill the request. |
| 502 | Server Errors (5xx) | Bad Gateway: Received an invalid response from the upstream server. |
| 503 | Server Errors (5xx) | Service Unavailable: The server is overloaded or down for maintenance. |
| 504 | Server Errors (5xx) | Gateway Timeout: No timely response from the upstream server. |
| 505 | Server Errors (5xx) | HTTP Version Not Supported: The server does not support the HTTP version. |
| 506 | Server Errors (5xx) | Variant Also Negotiates: Internal configuration error. |
| 507 | Server Errors (5xx) | Insufficient Storage (WebDAV): The server cannot store the representation. |
| 508 | Server Errors (5xx) | Loop Detected (WebDAV): The server detected an infinite loop while processing. |
| 510 | Server Errors (5xx) | Not Extended: Extensions are required for the server to fulfill the request. |
| 511 | Server Errors (5xx) | Network Authentication Required: Client must authenticate to gain network access. |
Docker Image Layers
A Docker image is composed of multiple layers that work together to create a fully functional container. Each layer represents a step in the build process, and layers are stacked on top of one another to form the complete image.
Structure of a Docker Image:
-
BootFS (Boot File System):
- Description: This is the bottom-most layer in the Docker image. It includes files and directories needed to boot up a system.
- Function: It sets up the foundation for the base operating system within the container, similar to the host machine’s
/bootfolder.
-
Base Image:
- Description: The base image is typically a minimal operating system (e.g., Ubuntu, Alpine Linux) or any other image that acts as a starting point for your container.
- Examples: Ubuntu, Alpine, Debian.
- Function: Provides the core OS functionalities and dependencies needed for the higher layers.
-
Libraries:
- Description: Libraries required by the applications running in the container.
- Examples: libc, libssl, or any other standard libraries needed by the applications.
- Function: Provides necessary functionality for applications, ensuring they can function correctly within the container.
-
Packages and Applications:
- Description: Specific software, tools, or libraries that your application depends on.
- Examples: vim, curl, git, node.js, or custom software required by your application.
- Function: These packages allow you to run applications and scripts necessary for the container's purpose.
-
User Application (Optional):
- Description: The main application code that you intend to run within the container.
- Examples: A web server like Apache, Nginx, or any microservice application.
- Function: It is the purpose of the container, which could be serving web traffic, processing data, or any other specific task.
Writable Layer (Container-Specific):
- Description: Once a container is created from a Docker image, a writable layer is added on top of the image layers.
- Function: Any changes made during the container's runtime (like creating files or modifying configurations) are stored in this writable layer.
- Key Point: Changes to the writable layer do not impact the underlying image layers.