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@ -8,7 +8,7 @@
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+ 基于已有容器，使用 `docker commit` 命令构建
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```
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``` shell
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# 1 创建容器，执行相关操作，之后退出
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docker run -it ubuntu:18.04 /bin/bash
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docker exec -it xxxxxxxx
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@ -27,11 +27,9 @@
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docker run -it ubuntu:18.04 /bin/bash
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```
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+ 基于本地模板，使用 `docker import ` 导入
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```
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``` shell
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# 1 将现有容器，导出为模板文件
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docker export b66 > /root/myubuntu.tar
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@ -43,8 +41,6 @@
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docker run xxxx
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```
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+ 基于Dockerfile文件，使用 `docker build` 构建
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```tex
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@ -86,8 +82,6 @@
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docker build -f Dockerfile -t mynginx:v1 .
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```
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## 构建过程(docker build -f Dockerfile -t name .)
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> docker是c/s架构，c为docker cli，s为驻守服务进程。
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@ -95,16 +89,53 @@
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## 构建环境
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1. Dockerfile中所用的所有文件一定要和Dockerfile文件在同一级父目录下，可以为Dockerfile父目录的子目录
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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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|
|
=> [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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|
|
=> => sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177 762B / 762B 0.0s
|
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|
|
|
=> => sha256:a1801b843b1bfaf77c501e7a6d3f709401a1e0c83863037fa3aab063a7fdb9dc 529B / 529B 0.0s
|
|
|
|
|
=> => sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6 2.14kB / 2.14kB 0.0s
|
|
|
|
|
=> => extracting sha256:a1d0c75327776413fa0db9ed3adcdbadedc95a662eb1d360dad82bb913f8a1d1
|
|
|
|
|
|
|
|
|
|
# 构建第二阶段
|
|
|
|
|
# 执行命令 3.6s
|
|
|
|
|
=> [2/2] ADD ./project/ /usr/local/app/
|
|
|
|
|
# 导出镜像 0.3s
|
|
|
|
|
=> exporting to image
|
|
|
|
|
# 导出镜像层 0.0s
|
|
|
|
|
=> => exporting layers
|
|
|
|
|
# 写入镜像文件 0.0s
|
|
|
|
|
=> => writing image sha256:9f21ab65d16f8a8599aec0ba0c1b31b806ae675be2701a6d671ec42887ab5e56
|
|
|
|
|
# 给镜像打标签 0.0s
|
|
|
|
|
=> => naming to docker.io/library/mycentos:study1
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
## Dockerfile文件
|
|
|
|
|
|
|
|
|
|
@ -128,7 +159,7 @@ ADD ./project/ /usr/local/$file/
|
|
|
|
|
|
|
|
|
|
## 命令
|
|
|
|
|
|
|
|
|
|
+ FROM
|
|
|
|
|
+ FROM
|
|
|
|
|
|
|
|
|
|
> 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）。
|
|
|
|
|
>
|
|
|
|
|
@ -157,8 +188,7 @@ mcr.microsoft.com/dotnet/sdk:2.1 AS build
|
|
|
|
|
|
|
|
|
|
## run
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
|
``` shell
|
|
|
|
|
# /bin/sh -c 参数
|
|
|
|
|
-c 参数：把后面的命令(字符串)当成一个整体来执行
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
wanggaofeng
3 years ago