title: Why does building from a docker file take up all the disk space?
body: <p>I am using docker-compose to build and run my application. </p>
  
  <p>here is the docker-compose.yml: </p>
  
  <pre><code>db:
    image: postgres
  web:
    build: .
    command: sh startup.sh
    volumes:
      - .:/code
    ports:
      - "8000:8000"
    links:
      - db
  </code></pre>
  
  <p>my Dockerfile: </p>
  
  <pre><code>FROM python:2.7
  ENV PYTHONUNBUFFERED 1
  RUN apt-get update &amp;&amp; apt-get install -y nginx 
  RUN mkdir /code
  WORKDIR /code
  ADD requirements.txt /code/
  RUN pip install -r requirements.txt
  ADD . /code/
  </code></pre>
  
  <p>So, when I go to the command line and do <code>docker-compose up</code> it just sort of stays there saying <code>Building web...</code> for a long time then finally finishes with the error saying that it has run out of space. The vagrant vm has 40gb so i am not sure what would cause all of that space to be taken up.  </p>
  
  <pre><code>Pulling db (postgres:latest)...
  latest: Pulling from postgres
  
  902b87aaaec9: Pull complete
  9a61b6b1315e: Pull complete
  26a84c436db4: Pull complete
  22ed955cce18: Pull complete
  8b6b2a3b7f9c: Pull complete
  c783ebe7a1d4: Pull complete
  e07b5a739ed9: Pull complete
  0b82f508e063: Pull complete
  02fa71f1fa38: Pull complete
  b41b53da5fba: Pull complete
  49915906faae: Pull complete
  a814508841fa: Pull complete
  64957633c267: Pull complete
  a95070c23e86: Pull complete
  c5d75e7f9094: Pull complete
  3fa84fbfdec9: Pull complete
  39172f8b90f2: Pull complete
  09e02a9f8afe: Pull complete
  4df8a54cf33a: Pull complete
  3e840dbb5474: Pull complete
  730d1d72bda2: Already exists
  postgres:latest: The image you are pulling has been verified. Important: image verification is a tech preview feature and should not be relied on to provide security.
  
  Digest: sha256:66ba100bc635be1746daadd3ecfa46b51fbb767cd9fbc170edbf33483010065b
  Status: Downloaded newer image for postgres:latest
  Creating webapp_db_1...
  Building web...
  Step 0 : FROM python:2.7
  2.7: Pulling from python
  1ff9f26f09fb: Pull complete
  607e965985c1: Pull complete
  9213e81cb0f2: Pull complete
  0a18b31a754d: Pull complete
  894736a966eb: Pull complete
  169a877759a5: Pull complete
  4d661b41bfe3: Pull complete
  0c69eb1a3057: Pull complete
  c5942c48e4c6: Pull complete
  76e439c97b9c: Pull complete
  e1857ee1f3b5: Already exists
  902b87aaaec9: Already exists
  9a61b6b1315e: Already exists
  python:2.7: The image you are pulling has been verified. Important: image verification is a tech preview feature and should not be relied on to provide security.
  Digest: sha256:958cf6cce0a123875b9d04598a1927d92becc5cc0dae9bd5cf26ec821e2eda32
  Status: Downloaded newer image for python:2.7
   ---&gt; e1857ee1f3b5
  Step 1 : ENV PYTHONUNBUFFERED 1
   ---&gt; Running in daf17fb52804
   ---&gt; 32f372e41634
  Removing intermediate container daf17fb52804
  Step 2 : RUN apt-get update &amp;&amp; apt-get install -y nginx
   ---&gt; Running in aa1170c05965
  Get:1 http://security.debian.org jessie/updates InRelease [63.1 kB]
  Get:2 http://httpredir.debian.org jessie InRelease [134 kB]
  Get:3 http://security.debian.org jessie/updates/main amd64 Packages [157 kB]
  Get:4 http://httpredir.debian.org jessie-updates InRelease [123 kB]
  Get:5 http://httpredir.debian.org jessie/main amd64 Packages [9038 kB]
  Get:6 http://httpredir.debian.org jessie-updates/main amd64 Packages [3616 B]
  Fetched 9519 kB in 8s (1155 kB/s)
  Reading package lists...
  Reading package lists...
  Building dependency tree...
  Reading state information...
  The following packages were automatically installed and are no longer required:
    gir1.2-freedesktop gir1.2-gdkpixbuf-2.0 gir1.2-glib-2.0 gir1.2-rsvg-2.0
    libcairo-gobject2 libcairo-script-interpreter2 libcdt5 libcgraph6 libcroco3
    libdjvulibre-dev libelfg0 libexif-dev libexif12 libexpat1-dev
    libfontconfig1-dev libfreetype6-dev libgirepository-1.0-1 libglib2.0-bin
    libgraphviz-dev libgvc6 libgvpr2 libice-dev libice6 libilmbase-dev
    libjasper-dev libjbig-dev libjs-excanvas libjs-jquery liblcms2-dev
    liblqr-1-0-dev liblzo2-2 libmagickcore-6-arch-config libmagickcore-6-headers
    libmagickwand-6-headers libopenexr-dev libpathplan4 libpcre3-dev libpcrecpp0
    libpixman-1-dev libpng12-dev libpthread-stubs0-dev librsvg2-2
    librsvg2-common libsm-dev libsm6 libtiff5-dev libtiffxx5 libwmf-dev
    libx11-dev libxau-dev libxcb-render0-dev libxcb-shm0-dev libxcb1-dev
    libxdmcp-dev libxdot4 libxext-dev libxrender-dev libxt-dev libxt6
    mime-support pkg-config x11-common x11proto-core-dev x11proto-input-dev
    x11proto-kb-dev x11proto-render-dev x11proto-xext-dev xorg-sgml-doctools
    xtrans-dev
  Use 'apt-get autoremove' to remove them.
  The following extra packages will be installed:
    geoip-database init-system-helpers libgeoip1 nginx-common nginx-full
  Suggested packages:
    geoip-bin fcgiwrap nginx-doc ssl-cert
  The following NEW packages will be installed:
    geoip-database init-system-helpers libgeoip1 nginx nginx-common nginx-full
  0 upgraded, 6 newly installed, 0 to remove and 7 not upgraded.
  Need to get 2210 kB of archives.
  After this operation, 6860 kB of additional disk space will be used.
  Get:1 http://httpredir.debian.org/debian/ jessie/main libgeoip1 amd64 1.6.2-4 [90.8 kB]
  Get:2 http://httpredir.debian.org/debian/ jessie/main init-system-helpers all 1.22 [14.0 kB]
  Get:3 http://httpredir.debian.org/debian/ jessie/main geoip-database all 20150317-1 [1517 kB]
  Get:4 http://httpredir.debian.org/debian/ jessie/main nginx-common all 1.6.2-5 [86.6 kB]
  Get:5 http://httpredir.debian.org/debian/ jessie/main nginx-full amd64 1.6.2-5 [429 kB]
  Get:6 http://httpredir.debian.org/debian/ jessie/main nginx all 1.6.2-5 [72.1 kB]
  debconf: delaying package configuration, since apt-utils is not installed
  Fetched 2210 kB in 2s (829 kB/s)
  Selecting previously unselected package libgeoip1:amd64.
  (Reading database ... 18873 files and directories currently installed.)
  Preparing to unpack .../libgeoip1_1.6.2-4_amd64.deb ...
  Unpacking libgeoip1:amd64 (1.6.2-4) ...
  Selecting previously unselected package init-system-helpers.
  Preparing to unpack .../init-system-helpers_1.22_all.deb ...
  Unpacking init-system-helpers (1.22) ...
  Selecting previously unselected package geoip-database.
  Preparing to unpack .../geoip-database_20150317-1_all.deb ...
  Unpacking geoip-database (20150317-1) ...
  Selecting previously unselected package nginx-common.
  Preparing to unpack .../nginx-common_1.6.2-5_all.deb ...
  Unpacking nginx-common (1.6.2-5) ...
  Selecting previously unselected package nginx-full.
  Preparing to unpack .../nginx-full_1.6.2-5_amd64.deb ...
  Unpacking nginx-full (1.6.2-5) ...
  Selecting previously unselected package nginx.
  Preparing to unpack .../archives/nginx_1.6.2-5_all.deb ...
  Unpacking nginx (1.6.2-5) ...
  Processing triggers for systemd (215-17+deb8u1) ...
  Setting up libgeoip1:amd64 (1.6.2-4) ...
  Setting up init-system-helpers (1.22) ...
  Setting up geoip-database (20150317-1) ...
  Setting up nginx-common (1.6.2-5) ...
  Setting up nginx-full (1.6.2-5) ...
  invoke-rc.d: policy-rc.d denied execution of start.
  Setting up nginx (1.6.2-5) ...
  Processing triggers for libc-bin (2.19-18) ...
  Processing triggers for systemd (215-17+deb8u1) ...
   ---&gt; b0c936818d0d
  Removing intermediate container aa1170c05965
  Step 3 : RUN mkdir /code
   ---&gt; Running in cb513ddbaf65
   ---&gt; c1cc5a5da673
  Removing intermediate container cb513ddbaf65
  Step 4 : WORKDIR /code
   ---&gt; Running in d9ea2fb9e550
   ---&gt; 059962be4b7d
  Removing intermediate container d9ea2fb9e550
  Step 5 : ADD requirements.txt /code/
   ---&gt; fc1f1f9d63b9
  Removing intermediate container 4380a58aef2d
  Step 6 : RUN pip install -r requirements.txt
   ---&gt; Running in e9db31e110aa
  Collecting boto (from -r requirements.txt (line 1))
    Downloading boto-2.38.0-py2.py3-none-any.whl (1.3MB)
  Collecting django-storages (from -r requirements.txt (line 2))
    Downloading django-storages-1.1.8.tar.gz
  Collecting Django (from -r requirements.txt (line 3))
    Downloading Django-1.8.3-py2.py3-none-any.whl (6.2MB)
  Collecting psycopg2 (from -r requirements.txt (line 4))
    Downloading psycopg2-2.6.1.tar.gz (371kB)
  Building wheels for collected packages: django-storages, psycopg2
    Running setup.py bdist_wheel for django-storages
    Stored in directory: /root/.cache/pip/wheels/11/36/48/600ce18487aa34307973cf27d3004067f213dbba9df82e77c8
    Running setup.py bdist_wheel for psycopg2
    Stored in directory: /root/.cache/pip/wheels/e2/9a/5e/7b620848bbc7cfb9084aafea077be11618c2b5067bd532f329
  Successfully built django-storages psycopg2
  Installing collected packages: boto, django-storages, Django, psycopg2
  Successfully installed Django-1.8.3 boto-2.38.0 django-storages-1.1.8 psycopg2-2.6.1
   ---&gt; f64bc27b721e
  Removing intermediate container e9db31e110aa
  Step 7 : ADD . /code/
  Service 'web' failed to build: Untar re-exec error: exit status 1: output: write /code/.vagrant/machines/default/vmware_fusion/b2b99ae2-136e-4f62-96cc-d562e4867f09/disk-s007.vmdk: no space left on device
  </code></pre>
  
  <p>Does anyone know what is initially taking the <code>Building web...</code> step so long? Or why It would take up all the space on the machine. I am only installing a few packages and pip libraries.  </p>