How do I transfer a Docker image from one machine to another one without using a repository, no matter private or public?
I create my own image in VirtualBox, and wh
docker-push-ssh
is a command line utility I created just for this scenario.
It sets up a temporary private Docker registry on the server, establishes an SSH tunnel from your localhost, pushes your image, then cleans up after itself.
The benefit of this approach over docker save
(at the time of writing most answers are using this method) is that only the new layers are pushed to the server, resulting in a MUCH quicker upload.
Oftentimes using an intermediate registry like dockerhub is undesirable, and cumbersome.
https://github.com/brthor/docker-push-ssh
Install:
pip install docker-push-ssh
Example:
docker-push-ssh -i ~/my_ssh_key username@myserver.com my-docker-image
The biggest caveat is that you have to manually add your localhost to Docker's insecure_registries
configuration. Run the tool once and it will give you an informative error:
Error Pushing Image: Ensure localhost:5000 is added to your insecure registries.
More Details (OS X): https://stackoverflow.com/questions/32808215/where-to-set-the-insecure-registry-flag-on-mac-os
Where should I set the '--insecure-registry' flag on Mac OS?
When using docker-machine, you can copy images between machines mach1
and mach2
with:
docker $(docker-machine config <mach1>) save <image> | docker $(docker-machine config <mach2>) load
And of course you can also stick pv
in the middle to get a progess indicator:
docker $(docker-machine config <mach1>) save <image> | pv | docker $(docker-machine config <mach2>) load
You may also omit one of the docker-machine config
sub-shells, to use your current default docker-host.
docker save <image> | docker $(docker-machine config <mach>) load
to copy image from current docker-host to mach
or
docker $(docker-machine config <mach>) save <image> | docker load
to copy from mach
to current docker-host.
I want to move all images with tags.
```
OUT=$(docker images --format '{{.Repository}}:{{.Tag}}')
OUTPUT=($OUT)
docker save $(echo "${OUTPUT[*]}") -o /dir/images.tar
```
Explanation:
First OUT
gets all tags but separated with new lines. Second OUTPUT
gets all tags in an array. Third $(echo "${OUTPUT[*]}")
puts all tags for a single docker save
command so that all images are in a single tar.
Additionally, this can be zipped using gzip. On target, run:
tar xvf images.tar.gz -O | docker load
-O
option to tar
puts contents on stdin which can be grabbed by docker load
.