[bug] fabfile deployments scripts of keystone and horizon are not compatible with docker cache

[ghost]

According to this documentation source docker cache only check latest version of

RUN sudo apt-get update && \
    sudo apt-get install -y wget python python-dev git && \
    wget https://bootstrap.pypa.io/get-pip.py && \
    python get-pip.py

src https://github.com/ging/fiware-idm/blob/master/extras/docker/Dockerfile

The problem is that if they are in the latest version, no apt-get update is performed, but could be required for dependencies of deployment of keystone and horizon in line lrun('sudo apt-get install -y {0}'.format(dependencies)) of these fabfiles:

• https://github.com/ging/fiware-idm/blob/master/deployment/keystone.py
• https://github.com/ging/fiware-idm/blob/master/deployment/horizon.py

short solution is to put lrun('sudo apt-get update for each fabfile, this means 3 times apt-get update will be executed, but is the correct way. I don't know better approach.

[ghost]

So perhaps that's why bitergia's dockerfile include all that dependencies at the beginning https://github.com/Bitergia/fiware-chanchan-docker/blob/master/images/idm-keyrock/4.3.0/Dockerfile (I don't know if there are all)

[garcianavalon]

same answer as https://github.com/ging/fiware-idm/issues/32