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Docker container cannot copy file into volume
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)
Data science time! April 2019 and salary with experience
The Ask Question Wizard is Live!How is Docker different from a virtual machine?Should I use Vagrant or Docker for creating an isolated environment?How to list containers in DockerHow to get a Docker container's IP address from the host?How to remove old Docker containersCopying files from Docker container to hostCopying files from host to Docker containerHow to copy Docker images from one host to another without using a repositoryFrom inside of a Docker container, how do I connect to the localhost of the machine?What is the difference between the `COPY` and `ADD` commands in a Dockerfile?
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I am pretty new to docker, so i might be doing something truly wrong
I need to share some files between docker containers, using a docker compose file
I have already created a volume like this
docker volume create shared
After that i can check the created volume
docker volume inspect shared
[
"CreatedAt": "2019-03-08T14:54:57-05:00",
"Driver": "local",
"Labels": ,
"Mountpoint": "/var/lib/docker/volumes/shared/_data",
"Name": "shared",
"Options": ,
"Scope": "local"
]
My docker-compose.yaml file looks like this
version: '3.1'
services:
service1:
build:
context: Service1
dockerfile: Dockerfile
restart: always
container_name: server1-server
volumes:
- shared:/shared
service2:
build:
context: Service2
dockerfile: Dockerfile
restart: always
container_name: server2-server
volumes:
- shared:/shared
volumes:
shared:
external: true
And the Dockerfile looks like this (just for testing purposes)
FROM microsoft/dotnet:2.2-sdk AS build-env
RUN echo "test" > /shared/test.info
When i issue a docker-compose up command i get this error
/bin/sh: 1: cannot create /shared/test.info: Directory nonexistent
If i modify the Dockerfile to this
FROM microsoft/dotnet:2.2-sdk AS build-env
WORKDIR /app
COPY *.csproj ./
RUN cp *.csproj /shared/
I get this error
cp: cannot create regular file '/shared/': Not a directory
Any ideas how to achieve this ?
docker docker-volume
asked Mar 8 at 20:43
jmiguel77jmiguel77
495412
add a comment |
I am pretty new to docker, so i might be doing something truly wrong
I need to share some files between docker containers, using a docker compose file
I have already created a volume like this
docker volume create shared
After that i can check the created volume
docker volume inspect shared
[
"CreatedAt": "2019-03-08T14:54:57-05:00",
"Driver": "local",
"Labels": ,
"Mountpoint": "/var/lib/docker/volumes/shared/_data",
"Name": "shared",
"Options": ,
"Scope": "local"
]
My docker-compose.yaml file looks like this
version: '3.1'
services:
service1:
build:
context: Service1
dockerfile: Dockerfile
restart: always
container_name: server1-server
volumes:
- shared:/shared
service2:
build:
context: Service2
dockerfile: Dockerfile
restart: always
container_name: server2-server
volumes:
- shared:/shared
volumes:
shared:
external: true
And the Dockerfile looks like this (just for testing purposes)
FROM microsoft/dotnet:2.2-sdk AS build-env
RUN echo "test" > /shared/test.info
When i issue a docker-compose up command i get this error
/bin/sh: 1: cannot create /shared/test.info: Directory nonexistent
If i modify the Dockerfile to this
FROM microsoft/dotnet:2.2-sdk AS build-env
WORKDIR /app
COPY *.csproj ./
RUN cp *.csproj /shared/
I get this error
cp: cannot create regular file '/shared/': Not a directory
Any ideas how to achieve this ?
docker docker-volume
asked Mar 8 at 20:43
jmiguel77jmiguel77
495412
RUN mkdir /shared?
– Max♦
Mar 8 at 20:47
Thanks a lot @Max, that helped with the writing part; but now i need to read that stored data in another container; what should i do ? RUN mount or something ? because in the second container the problem is that i cannot mkdir the same directory
– jmiguel77
Mar 8 at 21:01
Could you expand yourdocker-compose.ymlto include the second service?
– Max♦
Mar 8 at 21:08
i edited the original post to reflect the second service, the second Dockerfile uses the same image and only does a RUN ls -ln /shared but /shared does not exists
– jmiguel77
Mar 8 at 21:12
i finally decided against my first approach and now am building the dependencies for the service in the same image, as a previous step to build the main application; this question should be closed now
– jmiguel77
Mar 11 at 15:14
add a comment |
I am pretty new to docker, so i might be doing something truly wrong
I need to share some files between docker containers, using a docker compose file
I have already created a volume like this
docker volume create shared
After that i can check the created volume
docker volume inspect shared
[
"CreatedAt": "2019-03-08T14:54:57-05:00",
"Driver": "local",
"Labels": ,
"Mountpoint": "/var/lib/docker/volumes/shared/_data",
"Name": "shared",
"Options": ,
"Scope": "local"
]
My docker-compose.yaml file looks like this
version: '3.1'
services:
service1:
build:
context: Service1
dockerfile: Dockerfile
restart: always
container_name: server1-server
volumes:
- shared:/shared
service2:
build:
context: Service2
dockerfile: Dockerfile
restart: always
container_name: server2-server
volumes:
- shared:/shared
volumes:
shared:
external: true
And the Dockerfile looks like this (just for testing purposes)
FROM microsoft/dotnet:2.2-sdk AS build-env
RUN echo "test" > /shared/test.info
When i issue a docker-compose up command i get this error
/bin/sh: 1: cannot create /shared/test.info: Directory nonexistent
If i modify the Dockerfile to this
FROM microsoft/dotnet:2.2-sdk AS build-env
WORKDIR /app
COPY *.csproj ./
RUN cp *.csproj /shared/
I get this error
cp: cannot create regular file '/shared/': Not a directory
Any ideas how to achieve this ?
docker docker-volume
asked Mar 8 at 20:43
jmiguel77jmiguel77
495412
I am pretty new to docker, so i might be doing something truly wrong
I need to share some files between docker containers, using a docker compose file
I have already created a volume like this
docker volume create shared
After that i can check the created volume
docker volume inspect shared
[
"CreatedAt": "2019-03-08T14:54:57-05:00",
"Driver": "local",
"Labels": ,
"Mountpoint": "/var/lib/docker/volumes/shared/_data",
"Name": "shared",
"Options": ,
"Scope": "local"
]
My docker-compose.yaml file looks like this
version: '3.1'
services:
service1:
build:
context: Service1
dockerfile: Dockerfile
restart: always
container_name: server1-server
volumes:
- shared:/shared
service2:
build:
context: Service2
dockerfile: Dockerfile
restart: always
container_name: server2-server
volumes:
- shared:/shared
volumes:
shared:
external: true
And the Dockerfile looks like this (just for testing purposes)
FROM microsoft/dotnet:2.2-sdk AS build-env
RUN echo "test" > /shared/test.info
When i issue a docker-compose up command i get this error
/bin/sh: 1: cannot create /shared/test.info: Directory nonexistent
If i modify the Dockerfile to this
FROM microsoft/dotnet:2.2-sdk AS build-env
WORKDIR /app
COPY *.csproj ./
RUN cp *.csproj /shared/
I get this error
cp: cannot create regular file '/shared/': Not a directory
Any ideas how to achieve this ?
docker docker-volume
docker docker-volume
asked Mar 8 at 20:43
jmiguel77jmiguel77
495412
asked Mar 8 at 20:43
jmiguel77jmiguel77
495412
edited Mar 8 at 21:10
jmiguel77
asked Mar 8 at 20:43
jmiguel77jmiguel77
495412
asked Mar 8 at 20:43
jmiguel77jmiguel77
495412
asked Mar 8 at 20:43
jmiguel77jmiguel77
495412
495412
RUN mkdir /shared?
– Max♦
Mar 8 at 20:47
Thanks a lot @Max, that helped with the writing part; but now i need to read that stored data in another container; what should i do ? RUN mount or something ? because in the second container the problem is that i cannot mkdir the same directory
– jmiguel77
Mar 8 at 21:01
Could you expand yourdocker-compose.ymlto include the second service?
– Max♦
Mar 8 at 21:08
i edited the original post to reflect the second service, the second Dockerfile uses the same image and only does a RUN ls -ln /shared but /shared does not exists
– jmiguel77
Mar 8 at 21:12
i finally decided against my first approach and now am building the dependencies for the service in the same image, as a previous step to build the main application; this question should be closed now
– jmiguel77
Mar 11 at 15:14
add a comment |
RUN mkdir /shared?
– Max♦
Mar 8 at 20:47
Thanks a lot @Max, that helped with the writing part; but now i need to read that stored data in another container; what should i do ? RUN mount or something ? because in the second container the problem is that i cannot mkdir the same directory
– jmiguel77
Mar 8 at 21:01
Could you expand yourdocker-compose.ymlto include the second service?
– Max♦
Mar 8 at 21:08
i edited the original post to reflect the second service, the second Dockerfile uses the same image and only does a RUN ls -ln /shared but /shared does not exists
– jmiguel77
Mar 8 at 21:12
i finally decided against my first approach and now am building the dependencies for the service in the same image, as a previous step to build the main application; this question should be closed now
– jmiguel77
Mar 11 at 15:14
RUN mkdir /shared?– Max♦
Mar 8 at 20:47
RUN mkdir /shared?– Max♦
Mar 8 at 20:47
Thanks a lot @Max, that helped with the writing part; but now i need to read that stored data in another container; what should i do ? RUN mount or something ? because in the second container the problem is that i cannot mkdir the same directory
– jmiguel77
Mar 8 at 21:01
Thanks a lot @Max, that helped with the writing part; but now i need to read that stored data in another container; what should i do ? RUN mount or something ? because in the second container the problem is that i cannot mkdir the same directory
– jmiguel77
Mar 8 at 21:01
Could you expand your
docker-compose.yml to include the second service?– Max♦
Mar 8 at 21:08
Could you expand your
docker-compose.yml to include the second service?– Max♦
Mar 8 at 21:08
i edited the original post to reflect the second service, the second Dockerfile uses the same image and only does a RUN ls -ln /shared but /shared does not exists
– jmiguel77
Mar 8 at 21:12
i edited the original post to reflect the second service, the second Dockerfile uses the same image and only does a RUN ls -ln /shared but /shared does not exists
– jmiguel77
Mar 8 at 21:12
i finally decided against my first approach and now am building the dependencies for the service in the same image, as a previous step to build the main application; this question should be closed now
– jmiguel77
Mar 11 at 15:14
i finally decided against my first approach and now am building the dependencies for the service in the same image, as a previous step to build the main application; this question should be closed now
– jmiguel77
Mar 11 at 15:14
add a comment |
1 Answer
1
active
oldest
votes
A Dockerfile contains instructions to create an image. After the image is built, the image can be run as a container.
A volume is attached when launching containers.
It thus makes no sense to use Dockerfile instructions to copy a file into a volume while building an image.
Volumes are generally used to share runtime data between containers, or to keep data after a container is stopped.
answered Mar 8 at 21:45
Boris van KatwijkBoris van Katwijk
1,05711122
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
A Dockerfile contains instructions to create an image. After the image is built, the image can be run as a container.
A volume is attached when launching containers.
It thus makes no sense to use Dockerfile instructions to copy a file into a volume while building an image.
Volumes are generally used to share runtime data between containers, or to keep data after a container is stopped.
answered Mar 8 at 21:45
Boris van KatwijkBoris van Katwijk
1,05711122
add a comment |
A Dockerfile contains instructions to create an image. After the image is built, the image can be run as a container.
A volume is attached when launching containers.
It thus makes no sense to use Dockerfile instructions to copy a file into a volume while building an image.
Volumes are generally used to share runtime data between containers, or to keep data after a container is stopped.
answered Mar 8 at 21:45
Boris van KatwijkBoris van Katwijk
1,05711122
add a comment |
A Dockerfile contains instructions to create an image. After the image is built, the image can be run as a container.
A volume is attached when launching containers.
It thus makes no sense to use Dockerfile instructions to copy a file into a volume while building an image.
Volumes are generally used to share runtime data between containers, or to keep data after a container is stopped.
answered Mar 8 at 21:45
Boris van KatwijkBoris van Katwijk
1,05711122
A Dockerfile contains instructions to create an image. After the image is built, the image can be run as a container.
A volume is attached when launching containers.
It thus makes no sense to use Dockerfile instructions to copy a file into a volume while building an image.
Volumes are generally used to share runtime data between containers, or to keep data after a container is stopped.
answered Mar 8 at 21:45
Boris van KatwijkBoris van Katwijk
1,05711122
answered Mar 8 at 21:45
Boris van KatwijkBoris van Katwijk
1,05711122
answered Mar 8 at 21:45
Boris van KatwijkBoris van Katwijk
1,05711122
answered Mar 8 at 21:45
Boris van KatwijkBoris van Katwijk
1,05711122
1,05711122
add a comment |
add a comment |
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RUN mkdir /shared?– Max♦
Mar 8 at 20:47
Thanks a lot @Max, that helped with the writing part; but now i need to read that stored data in another container; what should i do ? RUN mount or something ? because in the second container the problem is that i cannot mkdir the same directory
– jmiguel77
Mar 8 at 21:01
Could you expand your
docker-compose.ymlto include the second service?– Max♦
Mar 8 at 21:08
i edited the original post to reflect the second service, the second Dockerfile uses the same image and only does a RUN ls -ln /shared but /shared does not exists
– jmiguel77
Mar 8 at 21:12
i finally decided against my first approach and now am building the dependencies for the service in the same image, as a previous step to build the main application; this question should be closed now
– jmiguel77
Mar 11 at 15:14