Travis configuration to be capable of running the docker command inside a docker container by a host-share; you need to bind libapparmor due: /usr/bin/docker: error while loading shared libraries: libapparmor.so.1: cannot open shared object file: No such file or directory

.travis.yml

sudo: required

# any language should do it
language: bash

services:
- docker

# libapparmor1 should be already installed due a running service, but just in case
install:
- sudo apt-get update
- sudo apt-get install -y libapparmor1

# mounts the current directory under /usr/local/src and triggers docker build /usr/local/src
# note the :ro mount option for libapparmor.so.1
script:
- docker run -v /var/run/docker.sock:/var/run/docker.sock -v $(which docker):$(which docker) -v $(dpkg -L libapparmor1 | grep libapparmor.so.1$):/usr/lib/libapparmor.so.1:ro -v $(pwd):/usr/local/src debian:jessie $(which docker) build /usr/local/src