![]() ![]() Status: Downloaded newer image for alpine:latestĭisplay the mounted file system on the volume. □ gforghetti: $ docker container run -it -name my-app1 -volume my_binary_data:/home/dev/tmp alpine:latest sh Run a container and do a bind mount to the volume and bring up a shell inside the container. ![]() "Mountpoint": "/var/lib/docker/volumes/my_binary_data/_data", □ gforghetti: $ docker volume inspect my_binary_data The containers have to run on the same Docker node.Ĭreate a docker volume □ gforghetti: $ docker volume create my_binary_dataĭisplay the volume information □ gforghetti: $ docker volume ls Well without more details, here is how I would do it. You need to consider that in the virtual world that virtual machines, containers and applications all have failures, go down, require “maintenance”, new versions, etc etc. What happens to containers running Docker Image 2 and Docker Image 3 if they cannot access the binary data from the container running Docker Image 1? Can those applications “recover/retry”? How often will you need to rebuild the Docker Image 1 to create the /home/dev/tmp directory and put new binary data in it? Several times a day? Daily? Weekly? Once in a while? Rarely? None, it’s a one time thing? When you run containers from these images and wish to access the binary data created by the container started from Docker Image 1, will these 2 containers be updating the binary data in the /home/dev/tmp directory running in the container started from * Docker Image 1, or will these 2 containers just read the binary data? Questions about Docker Image 2 and Docker Image 3 –What happens if this container crashes or the docker node crashes, do you need to recreate the data? Or can you just start a new container from this docker image. ![]() –Do you need to backup this data in case the container crashes or the docker nodes crashes? –Is this data sensitive, does it need to be encrypted, protected? –When you run a container from this docker image, will the binary data be changed in the the /home/dev/tmp directory by this container? –Does this image contain an application which will run when you run a container from this docker image? –Is the contents of the /home/dev/tmp directory code or data? You build this docker image and during the build you create the /home/dev/tmp directory and put binary data in that directory. 3.2.So you will have 3 docker images and wish to run 3 containers (one from each image).ĭocker image 1 (this one contains your binary data) Moreover, if we are working on Windows, we should take care of the path conversions. In this case, the container will start mounting an empty directory in the target path. Sometimes we provide an absolute source path to a file missing on the host machine. If we provide non-absolute paths, Docker CLI will return an error that terminates the command execution: docker: Error response from daemon: invalid mount config for type "bind": invalid mount path: 'file.txt+' mount path must be absolute. Now, we can look at common mistakes related to paths. We can also inspect container details, using the docker inspect command to check all mounts: "Mounts": [ ![]() In the end, let’s verify the mounting result: $ docker exec. The target (alternatively – destination, dst) takes the absolute path where the file or directory is mounted inside the container.įinally, there’s also a readonly option which makes the bind mount read-only. We can also use local shell commands to calculate the result. The source (alternatively – src) is the absolute path to the file or directory on the host that should be mounted. ![]()
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