关于Docker的目录结构分析，以及docker pull文件的存放问题

拼搏现实的明天。 2021-11-17 00:01 392阅读 0赞

## 一、可以肯定的是，Docker pull 肯定是包含download的过程，download是要指定目录的，或者默认，这里的Docker pull 就是默认的下载目录 ##

### 1.1 /etc/docker 目录下 ###

![在这里插入图片描述][20190729151202513.png]

##### key.json内容如下文件 #####

{
        "crv": "P-256",
        "d": "nh1mG3M1wrnBYBbt4EvKf4Ff4CkY9GrBQBMY1WtcpJI",
        "kid": "4KSA:PEIQ:I5SZ:O7VD:F3LC:RUUP:UFY4:CUPS:2SEF:FA7K:UW7C:57SL",
        "kty": "EC",
        "x": "W5jdmuJRZaKrO8t_Mld9MomA8QI0kuD3axg-Oq6VeHU",
        "y": "bBvIjlFFgFp-hE_Dl_NCuKScmsu90K4sEA9FLQOUVhY"
    }

### 1.2 /var/lib/docker 目录下 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTA1NjI5_size_16_color_FFFFFF_t_70]

### 1.3 /var/lib/docker/containers，这个目录，每每Docker run 一次，这里就会多一条记录![在这里插入图片描述][20190729152357621.png] ###

### 1.4 /var/lib/docker/containerd ###

![在这里插入图片描述][20190729151934221.png]

### 1.5 /var/lib/docker/image/overlay2,这个目录比较重要，所有的docker pull \*\*,都在这里存着 ###

![在这里插入图片描述][2019072915260332.png]

### 1.6 /var/lib/docker/image/overlay2/distribution，存的是 ###

![在这里插入图片描述][20190729153618967.png]

##### 1.6.1 /var/lib/docker/image/overlay2/distribution/diffid-by-digest/sha256 #####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTA1NjI5_size_16_color_FFFFFF_t_70 1]

### 1.6.2 /var/lib/docker/image/overlay2/distribution/v2metadata-by-diffid/sha256 ###

![在这里插入图片描述][20190729154422565.png]  
这里两个都是Json格式的数据

[
    {
    "Digest": "sha256:ee153a04d6837058642958836062f20badf39f558be3e6c7c7773ef7d8301d90",
    "SourceRepository": "docker.io/library/busybox",
    "HMAC": ""
    }
    ]

[
    {
    "Digest": "sha256:1b930d010525941c1d56ec53b97bd057a67ae1865eebf042686d2a2d18271ced",
    "SourceRepository": "docker.io/library/hello-world",
    "HMAC": ""
    }
    ]

### 1.7 /var/lib/docker/image/overlay2/imagedb ###

![在这里插入图片描述][20190729155223755.png]

### 1.7.1 /var/lib/docker/image/overlay2/imagedb/content/sha256 ###

![在这里插入图片描述][20190729155301438.png]

{
    "architecture": "amd64",
    "config": {},
    "container": "d6bc4fd488f31e0e72c06b4f268e475ff54ca7c17bc3a867da366aa581576057",
    "container_config": {},
    "created": "2019-07-18T21:20:21.810680491Z",
    "docker_version": "18.06.1-ce",
    "history": [],
    "os": "linux",
    "rootfs": {}
    }

{
    "architecture": "amd64",
    "config": {},
    "container": "8e2caa5a514bb6d8b4f2a2553e9067498d261a0fd83a96aeaaf303943dff6ff9",
    "container_config": {},
    "created": "2019-01-01T01:29:27.650294696Z",
    "docker_version": "18.06.1-ce",
    "history": [],
    "os": "linux",
    "rootfs": {}
    }

### 1.7.2 /var/lib/docker/image/overlay2/imagedb/metadata/sha256 ###

![在这里插入图片描述][20190729155606813.png]  
这个目录下，为空

### 1.8 /var/lib/docker/image/overlay2/layerdb ###

![在这里插入图片描述][2019072916003914.png]

### 1.9 repositories.json ,可以看出这里存的是docker pull 的文件 ###

{
    	"Repositories": {
    		"busybox": {
    			"busybox:latest": "sha256:db8ee88ad75f6bdc74663f4992a185e2722fa29573abcc1a19186cc5ec09dceb",
    			"busybox@sha256:9f1003c480699be56815db0f8146ad2e22efea85129b5b5983d0e0fb52d9ab70": "sha256:db8ee88ad75f6bdc74663f4992a185e2722fa29573abcc1a19186cc5ec09dceb"
    			},
    	"hello-world": {
    		"hello-world:latest": "sha256:fce289e99eb9bca977dae136fbe2a82b6b7d4c372474c9235adc1741675f587e",
    		"hello-world@sha256:6540fc08ee6e6b7b63468dc3317e3303aae178cb8a45ed3123180328bcc1d20f": "sha256:fce289e99eb9bca977dae136fbe2a82b6b7d4c372474c9235adc1741675f587e"
    		}
    	}
    }

## 下一篇，[Windows下如何构建Docker 项目][Windows_Docker] ##

[20190729151202513.png]: /images/20211116/44e84d90e0394279ab2ce6a9d2d78c5d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTA1NjI5_size_16_color_FFFFFF_t_70]: /images/20211116/b102c42947f84f91853e99333a7a6159.png
[20190729152357621.png]: /images/20211116/4aa6804f53df4b2b9e029fa8637e8f72.png
[20190729151934221.png]: /images/20211116/dcd48168e732408b9e9ad009c310ff44.png
[2019072915260332.png]: /images/20211116/470df8ae22e441e5a25844fadb2cd76b.png
[20190729153618967.png]: /images/20211116/13b6eb8eb89b4256ac39662f8cb81026.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTA1NjI5_size_16_color_FFFFFF_t_70 1]: /images/20211116/b1526d8d4ae94630ac5d1ed57eb19ac4.png
[20190729154422565.png]: /images/20211116/8a1f1bbfaedc42f4839549d21b59a404.png
[20190729155223755.png]: /images/20211116/19b9c9f3b88e49c3ac38b5efce9df884.png
[20190729155301438.png]: /images/20211116/dd713b6ceba24f019eabe4c44ed04761.png
[20190729155606813.png]: /images/20211116/9ca9329077224de0b67186465c0f8fd8.png
[2019072916003914.png]: /images/20211116/a7c896a5447b45f3b9064295069d2ca6.png
[Windows_Docker]: https://blog.csdn.net/qq_42105629/article/details/97760456