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From 3e0cafd68cf238646c9a2fad065898d2575501fb Mon Sep 17 00:00:00 2001
From: zhongtao <zhongtao17@huawei.com>
Date: Tue, 10 Dec 2024 23:53:53 +1400
Subject: [PATCH 08/19] supplementary registry design documentation
Signed-off-by: zhongtao <zhongtao17@huawei.com>
---
.../detailed/Image/registry_degisn_zh.md | 41 +++++++++++++++++++
docs/images/pull_detail.svg | 16 ++++++++
2 files changed, 57 insertions(+)
create mode 100644 docs/images/pull_detail.svg
diff --git a/docs/design/detailed/Image/registry_degisn_zh.md b/docs/design/detailed/Image/registry_degisn_zh.md
index ac351d9a..df1061a0 100644
--- a/docs/design/detailed/Image/registry_degisn_zh.md
+++ b/docs/design/detailed/Image/registry_degisn_zh.md
@@ -2,6 +2,7 @@
| ------ | ---------------------------------------------- |
| Date | 2020-05-28 |
| Email | [wangfengtu@huawei.com](wangfengtu@huawei.com) |
+| Update | 钟涛 2024/12/10 新增约束限制以及流程图 |
# 1.方案目标
@@ -70,6 +71,45 @@ void free_registry_login_options(registry_login_options *options);
## **Registry模块**
+### 流程图
+
+
+pull涉及多个线程（图中蓝色的方框为线程），只有fetch_layer时存在多线程同时拉取的情况，各个线程之间的顺序由condition与complete变量保障，已在上图中标记。
+
+g_shared->mutex保护多个下载线程操作g_shared->cached_layers的并发性以及操作condition与complete变量的原子性。
+
+### 支持限制
+拉取容器镜像支持的Media Types类型如下：
+
+1.支持的manifest Media Types类型。
+
+ (1) Docker规范镜像格式。
+ - Image Manifest Version 2, Schema 1
+ - application/vnd.docker.distribution.manifest.v1+json
+ - application/vnd.docker.distribution.manifest.v1+prettyjws
+ - Image Manifest Version 2, Schema 2
+ - application/vnd.docker.distribution.manifest.v2+json
+ - application/vnd.docker.distribution.manifest.list.v2+json
+
+ (2) OCI规范镜像格式。
+ application/vnd.oci.image.manifest.v1+json
+
+2.支持的layer Media Types类型。
+
+ (1) Docker规范镜像格式。
+ - Image Manifest Version 2, Schema 1
+ - application/vnd.docker.image.rootfs.diff.tar.gzip
+ - Image Manifest Version 2, Schema 2
+ - application/vnd.docker.image.rootfs.diff.tar.gzip
+ - application/vnd.docker.image.rootfs.foreign.diff.tar.gzip
+
+ (2) OCI规范镜像格式。
+ - application/vnd.oci.image.layer.v1.tar+gzip
+ - application/vnd.oci.image.layer.v1.tar
+ - application/vnd.oci.image.layer.nondistributable.v1.tar
+ - application/vnd.oci.image.layer.nondistributable.v1.tar+gzip
+### 详细步骤
+
Registry模块调用registry apiv2模块下载镜像相关文件，并进行解压/合法性校验后调store的接口注册成镜像，并对Manager模块提供调用接口。
登录操作：直接调用registry apiv2模块提供的接口实现。
@@ -388,3 +428,4 @@ libcurl提供了实现请求的原子命令，该模块需要基于libcurl提供
4、自定义消息头信息
+**注意**: iSulad目前仅支持从遵循HTTP 1.1协议的镜像仓库拉取镜像，尚不支持从遵循HTTP 2.0协议的镜像仓库拉取。
diff --git a/docs/images/pull_detail.svg b/docs/images/pull_detail.svg
new file mode 100644
index 00000000..25f61e39
--- /dev/null
+++ b/docs/images/pull_detail.svg
@@ -0,0 +1,16 @@
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1716.7187754377894 755.7398799633647" width="1716.7187754377894" height="755.7398799633647">
+ <!-- svg-source:excalidraw -->
+
+ <defs>
+ <style class="style-fonts">
+ @font-face {
+ font-family: "Virgil";
+ src: url("https://excalidraw.com/Virgil.woff2");
+ }
+ @font-face {
+ font-family: "Cascadia";
+ src: url("https://excalidraw.com/Cascadia.woff2");
+ }
+ </style>
+ </defs>
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