This only works on OS X as I'm using pbcopy
and pbpaste
. You may replace these as you see fit. Also I'm using superdocker here, you can swap that for docker if you like, it makes no difference.
What I needed to do was copy some SSL certificates from one container to another. I wanted the easiest way of doing this for the future. Thus I came up with this somewhat messy solution. I like it though. In this case the source container is called 'registry' and the destination container is a data volume container called 'publisherd-data'.
superdocker exec -ti $(superdocker ps | grep registry | awk '{print $1}') \
cat /go/src/github.com/docker/distribution/certs/domain.crt | \
pbcopy && \
superdocker run --rm -ti \
--volumes-from publisherd-data \
ubuntu bash -c "echo '$(pbpaste)' > /etc/nginx/certs/registry.domain.com.crt"
superdocker exec -ti $(superdocker ps | grep registry | awk '{print $1}') \
cat /go/src/github.com/docker/distribution/certs/domain.key | \
pbcopy && \
superdocker run --rm -ti \
--volumes-from publisherd-data \
ubuntu bash -c "echo '$(pbpaste)' > /etc/nginx/certs/registry.domain.com.key"
To break it down, we first grab the certificate by running docker exec on the source container, which we find by doing a quick docker ps | grep | awk.
superdocker exec -ti $(superdocker ps | grep registry | awk '{print $1}') \
cat /go/src/github.com/docker/distribution/certs/domain.crt
Next we pipe that to pbcopy, the OS X clibpoard utility.
superdocker exec -ti $(superdocker ps | grep registry | awk '{print $1}') \
cat /go/src/github.com/docker/distribution/certs/domain.crt | \
pbcopy
Then we run an ethereal container which we connect to the destination data volume container. We then simply empty our clipboard into the destination file.
superdocker exec -ti $(superdocker ps | grep registry | awk '{print $1}') \
cat /go/src/github.com/docker/distribution/certs/domain.crt | \
pbcopy && \
superdocker run --rm -ti \
--volumes-from publisherd-data \
ubuntu bash -c "echo '$(pbpaste)' > /etc/nginx/certs/registry.domain.com.crt"
It's a figurative mouthful, but it does the trick without saving your certs anywhere. You might also want to clear that clipboard afterwards though.
echo '' | pbcopy
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