clean things up to make it easier to switch to a different release

swiching to xenial should be as easy as modifying the dockerfile
and updating the update_mirror.sh script

Dockerfile

@@ -12,19 +12,21 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM ubuntu:14.04
+FROM ubuntu:trusty
 
 MAINTAINER bryan@turbojets.net
 
 ENV DEBIAN_FRONTEND noninteractive
+ENV DIST=ubuntu
+ENV RELEASE=trusty
 
 # Add Aptly repository
 RUN echo "deb http://repo.aptly.info/ squeeze main" > /etc/apt/sources.list.d/aptly.list
 RUN apt-key adv --keyserver keys.gnupg.net --recv-keys 9E3E53F19C7DE460
 
 # Add Nginx repository
-RUN echo "deb http://nginx.org/packages/ubuntu/ trusty nginx" > /etc/apt/sources.list.d/nginx.list
+RUN echo "deb http://nginx.org/packages/$DIST/ $RELEASE nginx" > /etc/apt/sources.list.d/nginx.list
-RUN echo "deb-src http://nginx.org/packages/ubuntu/ trusty nginx" >> /etc/apt/sources.list.d/nginx.list
+RUN echo "deb-src http://nginx.org/packages/$DIST/ $RELEASE nginx" >> /etc/apt/sources.list.d/nginx.list
 RUN apt-key adv --keyserver hkp://pgp.mit.edu:80 --recv-keys 573BFD6B3D8FBC641079A6ABABF5BD827BD9BF62
 
 # Update APT repository and install packages

README.md

@@ -86,8 +86,8 @@ Point a host at the mirror
 1. Fetch the public PGP key from your aptly repository and add it to your trusted repositories
 
  ```
- wget http://FQDN.OF.APTLY/aptly_repo_key.pub
+ wget http://FQDN.OF.APTLY/aptly_repo_signing.key
- apt-key add aptly_repo_key.pub
+ apt-key add aptly_repo_signing.key
  ```
 
 2. Backup then replace /etc/apt/sources.list

assets/startup.sh

@@ -3,6 +3,8 @@
 # If the repository GPG keypair doesn't exist, create it.
 if [[ ! -f /opt/aptly/aptly.sec ]] || [[ ! -f /opt/aptly/aptly.pub ]]; then
   /opt/gpg_batch.sh
+  # If your system doesn't have a lot of entropy this may, take a long time
+  # Google how-to create "artificial" entropy if this gets stuck
   gpg --batch --gen-key /opt/gpg_batch
 fi
 

shell.sh

@@ -2,11 +2,13 @@
 
 source vars
 
+PYTHON=`which python || which python3`
+
 docker inspect ${APP_NAME} > /dev/null 2>&1
 if [[ $? -ne 0 ]]; then
   echo "The ${APP_NAME} container doesn't appear to exist, exiting"
 fi
 
-CONTAINER_ID=`docker inspect ${APP_NAME} | python -c 'import sys, json; print json.load(sys.stdin)[0]["Id"]'`
+CONTAINER_ID=`docker inspect ${APP_NAME} | $PYTHON -c 'import sys, json; print(json.load(sys.stdin)[0]["Id"])'`
 
 docker exec -it ${CONTAINER_ID} /bin/bash

vars

@@ -14,7 +14,7 @@ EMAIL_ADDRESS=user@example.com
 # Password used to encrypt the signing key
 GPG_PASSWORD=repo1234
 # The directory on the Docker host to store repository data
-APTLY_DATADIR=/path/to/lots/of/space
+APTLY_DATADIR=/tmp/path/to/lots/of/space
 # FQDN of the Docker host that the aptly container will run on 
 HOSTNAME=aptly.example.com
 # TCP port that aptly will be reachable on, set to something else if you already