问题描述
我有一个Web应用程序，并且我正在使用docker将其部署到Linux服务器.我正在为我的应用程序使用ASP .NET CORE 2.1，MVC模型，并通过Visual Studio的集成Container Registry将其发布到docker hub.从我的服务器上拉图像，然后运行它.问题是，每次我将更新发布到我的应用程序时，它都会按需重置应用程序中的所有文件，这就是容器的工作方式.但是我需要一些文件保留在服务器中，并且每次更新应用程序时都不要重置，因此我需要使用卷.但是我不知道如何使用ASP CORE应用程序和docker卷，我想我可以创建它们，但是如何从应用程序访问它们?
I have web app and I'm using docker to deploy it to Linux server. I'm using ASP .NET CORE 2.1, MVC model for my app, and I publish it through Visual studio's integrated Container Registry to docker hub. from my server i pull image, and then run it. Problem is, every time I publish update to my app it resets all files in app, as it should, that's how containers work. But I need some files to stay in server and not to reset every time i update my app, so i need to use volumes. But I can't figure out how to use ASP CORE app and docker volumes, I think i can create them, but how to access them from app ?
我尝试了一些在网上找到的方法，
I'v tried some methods I found on web,
所以通常我要运行docker时，我会使用以下命令从hub.docker中将其拉出: docker pull mydockerid/appname:tag
So normaly I to run docker I pull it from hub.docker with: docker pull mydockerid/appname:tag
然后，使用命令运行它: docker run -p 3000:80 mydockerid/appname:tag 就是这样.
Then, run it with command: docker run -p 3000:80 mydockerid/appname:tagand that's it.
我尝试过: docker run -p 3000:80 -v〜mnt/files/xml:/xml mydockerid/appname:tag
据我了解，它应该使docker使用服务器文件夹"mnt/files/xml"作为我的名为"xml"的应用程序中的文件夹，但不起作用.
As I understood it it should make docker use server folder, "mnt/files/xml" as folder in my app named "xml", but doesn't work.
我也在使用数字海洋，目录"mnt/files/xml"是连接到Droplet的卷.
I'm also Using Digital ocean and directory "mnt/files/xml" is volume connected to droplet.
完美的解决方案是这样，这样我就可以在Droplet卷中创建docker卷，但是实际上任何可行的解决方案都很棒！
Perfect solution would be so I could create docker volume inside droplets volume, but really any solution that works would be great !
谢谢您的帮助！
推荐答案
好的，我很亲近，
要在Docker中创建卷，您需要从服务器中选择目录，从应用程序中选择文件夹.我的问题是，我在应用程序中显示了错误的目录.因为在docker容器中可以说根文件夹位于/app/root下，所以我的xml文件夹也是如此，所以我需要修复的就是使用 docker run -p 3000:80 -v〜mnt/files/xml:/app/xml mydockerid/appname:tag 而不是 docker run -p 3000:80 -v〜mnt/files/xml:/xml mydockerid/appname:tag 第一个目录始终来自服务器第二个总是来自应用程序.
to create volume in docker you need to chose directory from server and folder from app.the problem for me was, I was showing wrong directory in app. Because in docker container lets say root folder is under /app/root, so was my xml folder, all I needed to fix is to use docker run -p 3000:80 -v ~mnt/files/xml:/app/xml mydockerid/appname:tag instead of docker run -p 3000:80 -v ~mnt/files/xml:/xml mydockerid/appname:tag first directory is always from server and second is always from app.
关于数字海洋中的数量:
As for volumes in digital Ocean:
转到左侧管理下的卷.按右上角的创建音量"按钮.选择Volume的配置，然后将其附加到您的液滴上.
Go to Volumes under manage on left.Press Create Volume button on top right.Choose configuration of Volume, then attach it to your droplet.
安装:
$ mkdir -p /mnt/files
# Mount your volume at the newly-created mount point:
$ mount -o discard,defaults,noatime /dev/disk/by-id/scsi-0DO_volume_name /mnt/files
# Change fstab so the volume will be mounted after a reboot
$ echo '/dev/disk/by-id/scsi-0DO_volume_name /mnt/files ext4 defaults,nofail,discard 0 0' | sudo tee -a /etc/fstab
如果进入卷上更多"下的配置指令"，Digital Ocean实际上将显示所有这些命令和卷名.
Digital Ocean will actualy show all these comands with your volume names if you go into "Config instruction" under "More" on your Volume.
然后因为我的DO卷已挂载到/mnt/files，我通过filezila连接到服务器，将所需的文件放在"xml"文件夹中，并使用 docker容器运行docker run -p 3000:80 -v〜mnt/files/xml:/xml mydockerid/appname:tag ，现在服务器中的xml文件夹中都有.它将在我的应用程序内部(名为xml的文件夹)中读取，并且我可以更新应用程序，并且该文件夹永远不会丢失数据.同样，我可以将此DO体积移动到另一个DO液滴而不会丢失数据.
Then becouse my DO volume is mounted to /mnt/files I connect to server via filezila, put needed files there in folder called "xml" and run the docker container with docker run -p 3000:80 -v ~mnt/files/xml:/xml mydockerid/appname:tag, Now whatever is in folder xml in server. will be read at it is inside my app inside, folder called xml, and I can update app and the folder will never loose data. Also I can move this DO volume to another DO droplet without data loss.
这篇关于如何在Asp核心Web应用(MVC)上创建和使用Docker卷的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！