docs(release): add README for Dragonfly v2.4.0 (#136)

Signed-off-by: Gaius <gaius.qi@gmail.com>

Author: gaius-qi

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releases/2.4.0/README-zh.md

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+# Dragonfly v2.4.0 发布了
+
+Dragonfly v2.4.0 发布了！🎉🎉🎉 感谢为此版本做出贡献的[贡献者们](https://github.com/dragonflyoss/dragonfly/graphs/contributors)，欢迎访问 [d7y.io](https://d7y.io) 网站。
+
+![dragonfly](images/dragonfly-linear.png)
+
+## 新增特性
+
+### 负载感知调度算法
+
+调度算法升级为一种两阶段调度算法，结合中央调度与节点级二次调度，基于实时负载感知来优化 P2P 下载性能。
+
+![p1](images/p1.svg)
+
+更多信息，请参阅 [Scheduling](https://d7y.io/docs/next/operations/deployment/applications/scheduler/#scheduling)。
+
+### Vortex 协议支持 P2P 文件传输
+
+Dragonfly 提供了基于 TLV 的新型 Vortex 传输协议，以提升 P2P 下载性能。使用 TLV（Tag-Length-Value）格式作为轻量级协议，替代 gRPC 进行节点间的数据传输。
+与 gRPC 相比，基于 TCP 的 Vortex 可将大文件下载时间减少 50%，基于 QUIC 的 Vortex 可减少 40%，两者都能有效降低峰值内存使用。
+
+更多信息，请参阅 [TCP Protocol Support for P2P File Transfer](https://github.com/dragonflyoss/design/blob/main/systems-analysis/tcp-protocol/tcp-protocol.md) 和 [QUIC Protocol Support for P2P File Transfer](https://github.com/dragonflyoss/design/blob/main/systems-analysis/quic-protocol/quic-protocol.md)。
+
+### Request SDK
+
+新增 SDK 用于将用户请求路由到 Seed Peer，使用一致性哈希算法，取代之前的 Kubernetes Service 负载均衡方式。
+
+![p2](images/p2.svg)
+
+更多信息，请参阅 [Request SDK](https://d7y.io/docs/next/advanced-guides/request-sdk/)。
+
+### 指定集群 ID 实现多集群 Kubernetes 简化部署
+
+Dragonfly 支持一种简化功能，用于部署和管理多个 Kubernetes 集群，方法是为每个集群显式分配一个 `schedulerClusterID`。
+这种方式允许用户直接控制集群亲和性，而无需依赖基于位置的调度元数据，例如 IDC、主机名或 IP 地址。
+
+使用此功能，每个 Peer、Seed Peer 和 Scheduler 都通过明确定义的 Scheduler Cluster ID 来确定其目标调度器集群。
+这确保了集群之间的精确隔离以及可预测的跨集群行为。
+
+![p3](images/p3.png)
+
+更多信息，请参阅 [Create Dragonfly Cluster Simple](https://d7y.io/docs/next/getting-started/quick-start/multi-cluster-kubernetes/#create-dragonfly-cluster-simple)。
+
+### Manager 和 Scheduler 组件的性能和资源优化
+
+增强了 Manager 和 Scheduler 组件的性能和资源利用率，同时显著降低了 CPU 和内存开销，提升了系统效率和资源管理能力。
+
+### 增强预热功能
+
+- 支持预热到指定节点：采用基于优先级的选择逻辑，其中 IP 指定具有最高优先级，其次是基于数量的选择，最后是基于百分比的选择。
+
+- 支持在单个预热任务中预热多个 URL。
+
+- 支持通过 Scheduler gRPC 接口预热文件和镜像。
+
+![p4](images/p4.png)
+
+### 基于镜像 Blob SHA256 计算 ID 以避免重复下载
+
+客户端现已支持直接根据镜像 Blob 的 SHA256 哈希值计算任务 ID，而不再使用下载 URL。此增强功能可以防止当同一 Blob 从不同镜像仓库
+域名访问时产生的重复下载和数据冗余问题，新版本默认启用此功能。
+
+### 缓存 HTTP 307 重定向 URL
+
+新增对 HTTP 307（临时重定向）响应 URL 的缓存支持，以优化 Dragonfly 的多分片下载性能。当下载 URL 被拆分为多个分片时，
+重定向目标地址现在会被缓存，从而消除冗余的重定向请求并降低延迟。
+
+### Go 客户端已弃用，并由 Rust 客户端取代
+
+Go 客户端已被弃用，并由 [Rust 客户端](https://github.com/dragonflyoss/client) 取代。未来所有的开发和维护工作将专注于 Rust 客户端，它提供了更好的性能、稳定性和可靠性。
+
+更多信息，请参阅 [dragoflyoss/client](https://github.com/dragonflyoss/client)。
+
+### 附加功能增强
+
+- 在 Rust 客户端中启用 ARM64 架构的 64K 页面大小支持。
+- 修复 dfget 版本输出中缺失的 git commit 元数据问题。
+- 支持 containerd V3 配置中 `io.containerd.cri.v1.images` 插件的 `config_path` 配置。
+- 在 `reqwest` 中使用 `hickory-dns` 替换 `glibc DNS` 解析器，以实现 DNS 缓存并防止分片下载过程中过多的 DNS 查询。
+- 支持 `--include-files` 配置参数，可选择性地从目录中下载文件。
+- 添加 `--no-progress` 配置参数，可禁用下载进度条输出。
+- 支持 `backend` 操作中的自定义请求头，为 HTTP 请求提供灵活的请求头配置。
+- 重构日志输出，减少冗余日志记录并提高日志可读性。
+
+## 重要修复
+
+- 将数据库字段类型从 `text` 修改为 `longtext`，以支持存储预热任务的信息。
+- 修复了 Scheduler 关闭期间重复停止 Seed Peer 服务时导致的 panic 问题。
+- 修复了在指定 Redis 密码但未设置用户名时，Broker 认证失败的问题。
+
+## Nydus
+
+### 新增特性
+
+- Nydusd：为 RAFS V5 和 V6 格式添加运行时 CRC32 校验支持，增强数据完整性验证。
+- Nydusd：支持在 Nydusd 恢复过程中重新发送 FUSE 请求，提高进程恢复的可靠性。
+- Nydusd：增强 VFS 状态保存机制，用于进程热升级和故障转移。
+- Nydusify：支持 Nydus 到 OCI 的反向转换能力（实验性功能），支持无缝迁移回 OCI 格式。
+- Nydusify：实现镜像拷贝时零磁盘传输，显著减少复制操作期间对本地磁盘的使用。
+- Snapshotter：将 `blob.meta` 打包到 Bootstrap 中，提高 RAFS V6 镜像的 Blob 下载时的可靠性
+
+### 重要修复
+
+- Nydusd：修复镜像仓库认证中 `access_token` 字段的认证令牌获取问题。
+- Nydusd：为 umount API 添加了递归的 inode/dentry 失效处理。
+- Nydus Image：修复 optimize 子命令中的多个问题，并添加后端配置支持。
+- Snapshotter：为代理模式实现延迟父快照恢复，修复父快照缺失问题。
+
+## 其他
+
+您可以在 [CHANGELOG](https://github.com/dragonflyoss/dragonfly/blob/main/CHANGELOG.md) 中查看更多详细信息。
+
+## 链接
+
+- Dragonfly 网站：<https://d7y.io/>
+- Dragonfly 仓库：<https://github.com/dragonflyoss/dragonfly>
+- Dragonfly 客户端仓库：<https://github.com/dragonflyoss/client>
+- Dragonfly 控制台仓库：<https://github.com/dragonflyoss/console>
+- Dragonfly Charts 仓库：<https://github.com/dragonflyoss/helm-charts>
+- Dragonfly 监控仓库：<https://github.com/dragonflyoss/monitoring>
+
+## Dragonfly Github
+
+![qrcode](images/qrcode.webp)

releases/2.4.0/README.md

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+# Dragonfly v2.4.0 is released
+
+Dragonfly v2.4.0 is released!🎉🎉🎉 Thanks the [contributors](https://github.com/dragonflyoss/dragonfly/graphs/contributors) who made this release happend and welcome you to visit [d7y.io](https://d7y.io) website.
+
+![dragonfly](images/dragonfly-linear.png)
+
+## New features and enhancements
+
+### load-aware scheduling algorithm
+
+A two-stage scheduling algorithm combining central scheduling with node-level secondary scheduling to
+optimize P2P download performance based on real-time load awareness.
+
+![p1](images/p1.svg)
+
+For more information, please refer to the [Scheduling](https://d7y.io/docs/next/operations/deployment/applications/scheduler/#scheduling).
+
+### Vortex Protocol Support for P2P File Transfer
+
+Dragonfly provide the new Vortex transfer protocol based on TLV to improve the download performance in internal network.
+Use the TLV (Tag-Length-Value) format as a lightweight protocol to replace gRPC for data transfer between peers.
+TCP-based Vortex reduces large file download time by `50%` and QUIC-based Vortex by `40%` compared to gRPC, both effectively reducing peak memory usage.
+
+For more information, please refer to the [TCP Protocol Support for P2P File Transfer](https://github.com/dragonflyoss/design/blob/main/systems-analysis/tcp-protocol/tcp-protocol.md) and [QUIC Protocol Support for P2P File Transfer](https://github.com/dragonflyoss/design/blob/main/systems-analysis/quic-protocol/quic-protocol.md).
+
+### Request SDK
+
+A SDK for routing User requests to Seed Peers using consistent hashing, replacing the previous Kubernetes Service load balancing approach.
+
+![p2](images/p2.svg)
+
+For more details, please refer to [Request SDK](https://d7y.io/docs/next/advanced-guides/request-sdk/).
+
+### Simple Multi‑Cluster Kubernetes Deployment with Scheduler Cluster ID
+
+Dragonfly supports a simplified feature for deploying and managing multiple Kubernetes clusters by explicitly assigning a `schedulerClusterID` to each cluster.
+This approach allows users to directly control cluster affinity without relying on location‑based scheduling metadata such as IDC, hostname, or IP.
+
+Using this feature, each Peer, Seed Peer, and Scheduler determines its target scheduler cluster through a clearly defined scheduler cluster ID.
+This ensures precise separation between clusters and predictable cross‑cluster behavior.
+
+![p3](images/p3.png)
+
+For more information, please refer to the [Create Dragonfly Cluster Simple](https://d7y.io/docs/next/getting-started/quick-start/multi-cluster-kubernetes/#create-dragonfly-cluster-simple).
+
+### Performance and Resource Optimization for Manager and Scheduler Components
+
+Enhanced service performance and resource utilization across Manager and Scheduler components while significantly reducing
+CPU and memory overhead, delivering improved system efficiency and better resource management.
+
+### Enhanced Preheating
+
+- Support for IP-based peer selection in preheating jobs with priority-based selection logic where IP specification
+  takes highest priority, followed by count-based and percentage-based selection
+
+- Support for preheating multiple URLs in a single request.
+
+- Support for preheating file and image via Scheduler gRPC interface.
+
+![p4](images/p4.png)
+
+### Calculate task ID based on image blob SHA256 to avoid redundant downloads
+
+The Client now supports calculating task IDs directly from the SHA256 hash of image blobs instead of using the download URL.
+This enhancement prevents redundant downloads and data duplication when the same blob is accessed from
+different registry domains.
+
+### Cache HTTP 307 redirects for split downloads
+
+Support for caching HTTP 307 (Temporary Redirect) responses to optimize Dragonfly's multi-piece download performance.
+When a download URL is split into multiple pieces, the redirect target is now cached,
+eliminating redundant redirect requests and reducing latency.
+
+### Go Client Deprecated and Replaced by Rust Client
+
+The Go client has been deprecated and replaced by the [Rust Client](https://github.com/dragonflyoss/client). All future development and maintenance will focus
+exclusively on the Rust client, which offers improved performance, stability, and reliability.
+
+For more information, please refer to the [dragoflyoss/client](https://github.com/dragonflyoss/client).
+
+### Additional Enhancements
+
+- Enable 64K page size support for ARM64 in the Dragonfly Rust client.
+- Fix missing git commit metadata in dfget version output.
+- Support for `config_path` of `io.containerd.cri.v1.images` plugin for containerd V3 configuration.
+- Replaces glibc DNS resolver with hickory-dns in reqwest to implement DNS caching and prevent excessive DNS lookups during piece downloads.
+- Support for the --include-files flag to selectively download files from a directory.
+- Add the `--no-progress flag` to disable the download progress bar output.
+- Support for custom request headers in backend operations, enabling flexible header configuration for HTTP requests.
+- Refactored log output to reduce redundant logging and improve overall logging efficiency.
+
+## Significant bug fixes
+
+- Modified the database field type from `text` to `longtext` to support storing the information of preheating job.
+- Fixed panic on repeated seed peer service stops during Scheduler shutdown.
+- Fixed broker authentication failure when specifying the Redis password without setting a username.
+
+## Nydus
+
+### New features and enhancements
+
+- Nydusd: Add CRC32 validation support for both RAFS V5 and V6 formats, enhancing data integrity verification.
+- Nydusd: Support resending FUSE requests during nydusd restoration, improving daemon recovery reliability.
+- Nydusd: Enhance VFS state saving mechanism for daemon hot upgrade and failover.
+- Nydusify: Introduce Nydus-to-OCI reverse conversion capability, enabling seamless migration back to OCI format.
+- Nydusify: Implement zero-disk transfer for image copy, significantly reducing local disk usage during copy operations.
+- Snapshotter: Builtin blob.meta in bootstrap for blob fetch reliability for RAFS v6 image.
+
+### Significant bug fixes
+
+- Nydusd: Fix auth token fetching for `access_token` field in registry authentication.
+- Nydusd: Add recursive inode/dentry invalidation for umount API.
+- Nydus Image: Fix multiple issues in optimize subcommand and add backend configuration support.
+- Snapshotter: Implement lazy parent recovery for proxy mode to handle missing parent snapshots.
+
+## Others
+
+You can see [CHANGELOG](https://github.com/dragonflyoss/dragonfly/blob/main/CHANGELOG.md) for more details.
+
+## Links
+
+- Dragonfly Website: <https://d7y.io/>
+- Dragonfly Repository: <https://github.com/dragonflyoss/dragonfly>
+- Dragonfly Client Repository: <https://github.com/dragonflyoss/client>
+- Dragonfly Console Repository: <https://github.com/dragonflyoss/console>
+- Dragonfly Charts Repository: <https://github.com/dragonflyoss/helm-charts>
+- Dragonfly Monitor Repository: <https://github.com/dragonflyoss/monitoring>
+
+## Dragonfly Github
+
+![qrcode](images/qrcode.webp)