如何在Docker容器中挂载主机目录 [英] How to mount a host directory in a Docker container
问题描述
我正在尝试将主机目录挂载到Docker容器中,以便将主机上完成的所有更新都反映到Docker容器中.
I am trying to mount a host directory into a Docker container so that any updates done on the host is reflected into the Docker containers.
我在哪里做错了什么.这是我所做的:
Where am I doing something wrong. Here is what I did:
kishore$ cat Dockerfile
FROM ubuntu:trusty
RUN apt-get update
RUN apt-get -y install git curl vim
CMD ["/bin/bash"]
WORKDIR /test_container
VOLUME ["/test_container"]
kishore$ tree
.
├── Dockerfile
└── main_folder
├── tfile1.txt
├── tfile2.txt
├── tfile3.txt
└── tfile4.txt
1 directory, 5 files kishore$ pwd /Users/kishore/tdock
1 directory, 5 files kishore$ pwd /Users/kishore/tdock
kishore$ docker build --tag=k3_s3:latest .
Uploading context 7.168 kB
Uploading context
Step 0 : FROM ubuntu:trusty
---> 99ec81b80c55
Step 1 : RUN apt-get update
---> Using cache
---> 1c7282005040
Step 2 : RUN apt-get -y install git curl vim
---> Using cache
---> aed48634e300
Step 3 : CMD ["/bin/bash"]
---> Running in d081b576878d
---> 65db8df48595
Step 4 : WORKDIR /test_container
---> Running in 5b8d2ccd719d
---> 250369b30e1f
Step 5 : VOLUME ["/test_container"]
---> Running in 72ca332d9809
---> 163deb2b1bc5
Successfully built 163deb2b1bc5
Removing intermediate container b8bfcb071441
Removing intermediate container d081b576878d
Removing intermediate container 5b8d2ccd719d
Removing intermediate container 72ca332d9809
kishore $ docker run -d -v/Users/kishore/main_folder:/test_container k3_s3:latest
c9f9a7e09c54ee1c2cc966f15c963b4af320b5203b8c46689033c1ab8872a0ea
kishore$ docker run -d -v /Users/kishore/main_folder:/test_container k3_s3:latest
c9f9a7e09c54ee1c2cc966f15c963b4af320b5203b8c46689033c1ab8872a0ea
kishore$ docker run -i -t k3_s3:latest /bin/bash
root@0f17e2313a46:/test_container# ls -al
total 8
drwx------ 2 root root 4096 Apr 29 05:15 .
drwxr-xr-x 66 root root 4096 Apr 29 05:15 ..
root @ 0f17e2313a46:/test_container#退出 退出
root@0f17e2313a46:/test_container# exit exit
kishore$ docker -v
Docker version 0.9.1, build 867b2a9
- 我不知道如何检查boot2docker版本
问题,面临的问题:
- 我如何将main_folder链接到docker容器内的test_container文件夹?
- 我需要自动进行此操作.如何在不真正使用
run -d -v
命令的情况下做到这一点? - 如果boot2docker崩溃怎么办? Docker文件存储在何处(除了Dockerfile)?
- How do I need to link the main_folder to the test_container folder present inside the docker container?
- I need to make this automatically. How do I to do that without really using the
run -d -v
command? - What happens if the boot2docker crashes? Where are the Docker files stored (apart from Dockerfile)?
推荐答案
有两种方法可以执行此操作.最简单的方法是像这样使用dockerfile ADD
命令:
There are a couple ways you can do this. The simplest way to do so is to use the dockerfile ADD
command like so:
ADD . /path/inside/docker/container
但是,构建dockerfile之后,主机上对此目录所做的任何更改都不会显示在容器中.这是因为在构建容器时,docker将目录压缩为.tar
并将该 context 永久上传到容器中.
However, any changes made to this directory on the host after building the dockerfile will not show up in the container. This is because when building a container, docker compresses the directory into a .tar
and uploads that context into the container permanently.
执行此操作的第二种方法是尝试的方法,即装入卷.由于尝试尽可能地具有可移植性,因此您无法将主机目录映射到dockerfile中的docker容器目录,因为主机目录可以根据运行的计算机而更改.要将主机目录映射到Docker容器目录,您需要在使用docker run时使用-v
标志,如下所示:
The second way to do this is the way you attempted, which is to mount a volume. Due to trying to be as portable as possible you cannot map a host directory to a docker container directory within a dockerfile, because the host directory can change depending on which machine you are running on. To map a host directory to a docker container directory you need to use the -v
flag when using docker run like so:
docker run -v /host/directory:/container/directory -other -options image_name command_to_run
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