Refs #71087 - Add rsync server/client support

This commit is contained in:
Alin Voinea 2016-04-08 17:15:46 +03:00
parent 4dd97037ed
commit 09ba3b4d1d
3 changed files with 118 additions and 4 deletions

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@ -2,3 +2,8 @@ FROM alpine:3.3
MAINTAINER "EEA: IDM2 A-Team" <eea-edw-a-team-alerts@googlegroups.com>
RUN apk add --no-cache --virtual .run-deps rsync openssh
COPY docker-entrypoint.sh /
VOLUME /root
ENTRYPOINT ["/docker-entrypoint.sh"]
CMD ["sh"]

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@ -1,8 +1,49 @@
# Simple rsync container based on alpine
A simple rsync Docker image to easily rsync data within Docker volumes
A simple rsync server/client Docker image to easily rsync data within Docker volumes
## Usage
## Simple Usage
$ docker run -it --rm -v blobstorage:/data/ eeacms/rsync \
rsync user@remote.server.domain.or.ip:/var/local/blobs/ /data/
Get files from remote server within a `docker volume`:
$ docker run --rm -v blobstorage:/data/ eeacms/rsync \
rsync -avz user@remote.server.domain.or.ip:/var/local/blobs/ /data/
Get files from `remote server` to a `data container`:
$ docker run -d --name data -v /data busybox
$ docker run --rm --volumes-from=data eeacms/rsync \
rsync -avz user@remote.server.domain.or.ip:/var/local/blobs/ /data/
## Advanced Usage
### Client setup
Start client to sync every night at 3AM:
$ docker run --name=rsync_client -v client_vol_to_sync:/data \
-e CRON_TASK="0 3 * * * rsync -e 'ssh -p 2222 -o StrictHostKeyChecking=no' -avz root@foo.bar.com:/data/ /data/" \
eeacms/rsync client
Copy the client SSH public key printed found in console
### Server setup
Start server on `foo.bar.com`
# docker run --name=rsync_server -d -p 2222:22 -v server_vol_to_sync:/data \
-e SSH_AUTH_KEY="<SSH KEY FROM rsync_client>" \
eeacms/rsync server
### Verify that it works
Add `test` file on server:
$ docker exec -it rsync_server sh
$ touch /data/test
Bring the `file` on client:
$ docker exec -it rsync_client sh
$ rsync -e 'ssh -p 2222 -o StrictHostKeyChecking=no' -avz root@foo.bar.com:/data/ /data/
$ ls -l /data/

68
docker-entrypoint.sh Executable file
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@ -0,0 +1,68 @@
#!/bin/sh
################################################################################
# INIT
################################################################################
# Provide SSH AUTHORIZED KEY via environment variable
if [ ! -z "$SSH_AUTH_KEY" ]; then
mkdir -p /root/.ssh
echo "$SSH_AUTH_KEY" > /root/.ssh/authorized_keys
chmod go-rwx /root/.ssh/authorized_keys
sed -i "s/#PasswordAuthentication yes/PasswordAuthentication no/g" /etc/ssh/sshd_config
fi
# Provide CRON_TASK via environment variable
if [ ! -z "$CRON_TASK" ]; then
echo "$CRON_TASK" > /etc/crontabs/root
echo "root" > /etc/crontabs/cron.update
fi
# Generate host SSH keys
if [ ! -e /etc/ssh/ssh_host_rsa_key.pub ]; then
ssh-keygen -A
fi
# Generate root SSH key
if [ ! -e /root/.ssh/id_rsa.pub ]; then
ssh-keygen -q -N "" -f /root/.ssh/id_rsa
fi
################################################################################
# START as SERVER
################################################################################
if [ "$1" == "server" ]; then
AUTH=`cat /root/.ssh/authorized_keys`
if [ -z "$AUTH" ]; then
echo "=================================================================================="
echo "ERROR: No SSH_AUTH_KEY provided, you'll not be able to connect to this container. "
echo "=================================================================================="
exit 1
fi
SSH_PARAMS="-D -e -p ${SSH_PORT:-22} $SSH_PARAMS"
echo "================================================================================"
echo "Running: /usr/sbin/sshd $SSH_PARAMS "
echo "================================================================================"
exec /usr/sbin/sshd -D $SSH_PARAMS
fi
echo "Please add this ssh key to your server /home/user/.ssh/authorized_keys "
echo "================================================================================"
echo "`cat /root/.ssh/id_rsa.pub`"
echo "================================================================================"
################################################################################
# START as CLIENT via crontab
################################################################################
if [ "$1" == "client" ]; then
exec /usr/sbin/crond -f
fi
################################################################################
# Anything else
################################################################################
exec "$@"