Add Docker support

.gitignore

@@ -3,3 +3,4 @@ __pycache__
 venv/
 .idea/
 ssh_unlocker.egg-info/
+*~

Dockerfile

@@ -0,0 +1,11 @@
+FROM python:3-slim
+
+LABEL maintainer [email protected]
+
+WORKDIR /usr/src/app
+VOLUME /usr/src/conf
+ENV SSH_UNLOCK_VERBOSE ""
+
+COPY . .
+RUN pip3 install .
+CMD [ "python", "./unlock.py", "--config", "/usr/src/conf/config.ini"]

README.Dockerfile.md

@@ -0,0 +1,19 @@
+# Building a Docker image
+Simply run `./build_docker.sh` with no parameters. It'll create an image called `ssh-unlock:VERSION`
+where VERSION is based on specified version of unlocker library.
+
+If first arg is set it will create `$1:ssh-unlock:VERSION` so you can upload it easier to DockerHub if you want to.
+
+# Running a container
+At this time this Dockerfile is capable of using file configuration only as `config.ini`, which should be mounted in container's `/usr/src/config` directory.
+
+All private keys or configuration must be in this directory and properly referenced in configuration file `config.ini`. Mind that inside container all these files would be in `/usr/src/config/your_expeted_file`. This means that using `ConfigMap` object it could run easily on Kubernetes.
+
+## Docker run example
+`docker run -ti --rm -v $HOME/ssh-unlock/config/:/usr/src/config/ ssh-unlock:0.2`
+
+## Docker run example as daemon
+`docker run -d --name ssh-unlock -v $HOME/ssh-unlock/config/:/usr/src/config/ ssh-unlock:0.2`
+
+## See daemon logs
+`docker logs -f ssh-unlock`

build_docker.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+UNLOCK_VERSION=${UNLOCK_VERSION:-$(awk -F \' '{if($1="__version__ ="){print $2;exit}}' unlocker/__init__.py)}
+
+if [ ! -z ${UNLOCK_VERSION} ]
+then
+	echo "[$0] No image version specified not obtained from source. Set UNLOCK_VERSION env var to build this"
+	exit 1
+fi
+
+if [ ! -z $1 ]
+then
+	docker build . -t $1/ssh-unlock:${UNLOCK_VERSION}
+else
+	docker build . -t ssh-unlock:${UNLOCK_VERSION}
+fi