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@ -95,27 +95,27 @@
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2. Dockerfile中相对路径默认都是Dockerfile所在的目录
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3. 因Docker构建的分层构建，联合挂载的特性，Dockerfile中,每一条指令被视为一层,尽量一行写多个指令(&&连接 \用来分行)。
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4. 约定：指令大写，内容小写
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```shell
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# 构建流程
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# docke build . 默认构建
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# 输出,#行为手动添加的说明
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# 加载 Dockerfile 文件
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=> [internal] load build definition from Dockerfile
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# 把 dockerfile 文件传输到Docker守护进程服务，大小为 149B 0.0s
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=> => transferring dockerfile: 149B
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# 加载.dockerignore(Dockerfile目录下，不上传文件配置文件) 文件 0.0s
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=> [internal] load .dockerignore
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# 传输构建上下文（会传Docfile目录及子目录中除.dockerignore配置外的所有文件及文件夹） 0.0s
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=> => transferring context: 2B
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# 从基础镜像加载元数据 0.0s
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=> [internal] load metadata for docker.io/library/centos:latest
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# 加载构建上下文 3.0s
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=> [internal] load build context
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# 传输构建上下文 0.0s
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=> => transferring context: 125B
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# 构建第一阶段：下载与验证基础镜像 0.0s
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=> [internal] load build definition from Dockerfile 0.0s
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# 把 dockerfile 文件传输到Docker守护进程服务，大小为 149B
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=> => transferring dockerfile: 149B 0.0s
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# 加载.dockerignore(Dockerfile目录下，不上传文件配置文件) 文件
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=> [internal] load .dockerignore 0.0s
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# 传输构建上下文（会传Docfile目录及子目录中除.dockerignore配置外的所有文件及文件夹）
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=> => transferring context: 2B 0.0s
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# 从基础镜像加载元数据
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=> [internal] load metadata for docker.io/library/centos:latest 3.0s
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# 加载构建上下文
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=> [internal] load build context 0.0s
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# 传输构建上下文
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=> => transferring context: 125B 0.0s
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# 构建第一阶段：下载与验证基础镜像
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=> [1/2] FROM docker.io/library/centos@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177 10.8s
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=> => resolve docker.io/library/centos@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177 0.0s
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=> => sha256:a1d0c75327776413fa0db9ed3adcdbadedc95a662eb1d360dad82bb913f8a1d1 83.52MB / 83.52MB 7.0s
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@ -125,16 +125,17 @@
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=> => extracting sha256:a1d0c75327776413fa0db9ed3adcdbadedc95a662eb1d360dad82bb913f8a1d1
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# 构建第二阶段
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# 执行命令 3.6s
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=> [2/2] ADD ./project/ /usr/local/app/
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# 导出镜像 0.3s
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=> exporting to image
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# 导出镜像层 0.0s
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=> => exporting layers
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# 写入镜像文件 0.0s
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# 执行命令
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=> [2/2] ADD ./project/ /usr/local/app/ 3.6s
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# 导出镜像
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=> exporting to image 0.3s
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# 导出镜像层
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=> => exporting layers 0.0s
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# 写入镜像文件
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=> => writing image sha256:9f21ab65d16f8a8599aec0ba0c1b31b806ae675be2701a6d671ec42887ab5e56
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# 给镜像打标签 0.0s
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=> => naming to docker.io/library/mycentos:study1
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0.0s
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# 给镜像打标签
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=> => naming to docker.io/library/mycentos:study1 0.0s
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```
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## Dockerfile文件
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@ -161,7 +162,7 @@ ADD ./project/ /usr/local/$file/
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+ FROM
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> FROM 指令必须是非注释的第一个指令， 可以使用 “ AS 别名” 提供别名，在路另外使用（ --from）。
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> FROM 指令必须是非注释的第一个指令(新版AGU指令可值于前面)， 可以使用 “ AS 别名” 提供别名，在路另外使用（ --from=别名）。
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>
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> 指定了基础镜像，后面的所有指令都是运行在该基础镜像环境上的。
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>
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@ -171,7 +172,7 @@ ADD ./project/ /usr/local/$file/
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#语法格式
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FROM <image>
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FROM <image>:<tag>
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FROM <image>@<digest>
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FROM <image>@<digest摘要即md5值>
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# 特殊例子
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#不以任何镜像为基础(内置空白镜像)
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@ -181,9 +182,8 @@ FROM scratch
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# 大小只有1.2M，适合用来测试
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FROM busybox
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# .net core例子
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# .net core sdk
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mcr.microsoft.com/dotnet/sdk:2.1 AS build
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FROM mcr.microsoft.com/dotnet/sdk:2.1 AS build
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```
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## run
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wanggaofeng
3 years ago