github.com/misfo/deis@v1.0.1-0.20141111224634-e0eee0392b8a/docs/reference/terms/container.rst (about)

     1  :title: Container
     2  :description: Deis uses Docker containers to run applications.
     3  
     4  .. _container:
     5  
     6  Container
     7  =========
     8  Deis containers are instances of `Docker`_ containers used to run
     9  :ref:`Applications <application>`. Containers perform the actual work
    10  of an :ref:`application` by servicing requests or by running background
    11  tasks as part of the cluster.
    12  
    13  Ephemeral Filesystem
    14  --------------------
    15  
    16  Each container gets its own ephemeral filesystem, with a fresh copy of the most recently
    17  deployed code. During the container’s lifetime, its running processes can use the
    18  filesystem as a temporary scratchpad, but no files that are written are visible to
    19  processes in any other container. Any files written to the ephemeral filesystem will be
    20  discarded the moment the container is either stopped or restarted.
    21  
    22  Container States
    23  ----------------
    24  There are several states that a container can be in at any time. The
    25  states are:
    26  
    27  #. initialized - the state of the container before it is created
    28  #. created - the container is built and ready for operation
    29  #. up - the container is running
    30  #. down - the container crashed or is stopped
    31  #. destroyed - the container has been destroyed
    32  
    33  
    34  .. _`Docker`: http://docker.io/