How can I use a local image as the base image with a dockerfile

Question

I m working on a dockerfile  I just realised that I ve been using FROM with indexed images all along   So I wonder    How can I use one of my local  custom  images as my base  FROM  image without pushing it to the index

User · Answer

Verified  it works well in Docker 1 7 0  Don t specify --pull true when running the docker build command From this thread on reference locally-built image using FROM at dockerfile   If you want use the local image as the base image  pass without the option --pull true --pull true will always attempt to pull a newer version of the image

User · Answer

You can have - characters in your images  Assume you have a local image  not a local registry  named centos-base-image with tag 7 3 1611   docker version        Client         Version          1 12 6        API version      1 24        Package version  docker-common-1 12 6-16 el7 centos x86 64        Go version       go1 7 4        Server         Version          1 12 6        API version      1 24        Package version  docker-common-1 12 6-16 el7 centos x86 64        Go version       go1 7 4  docker images  REPOSITORY            TAG  centos-base-image     7 3 1611   Dockerfile  FROM centos-base-image 7 3 1611 RUN yum -y install epel-release libaio bc flex   Result  Sending build context to Docker daemon 315 9 MB Step 1   FROM centos-base-image 7 3 1611   --- gt  c4d84e86782e Step 2   RUN yum -y install epel-release libaio bc flex   --- gt  Running in 36d8abd0dad9       In the example above FROM is fetching your local image  you can provide additional instructions to fetch an image from your custom registry  e g  FROM localhost 5000 my-image with tag   See https   docs docker com engine reference commandline pull  pull-from-a-different-registry and https   docs docker com registry  tldr  Finally  if your image is not being resolved when providing a name  try adding a tag to the image when you create it  This GitHub thread describes a similar issue of not finding local images by name      By omitting a specific tag  docker will look for an image tagged  latest   so either create an image with the  latest tag  or change your FROM

User · Answer

You can use it without doing anything special  If you have a local image called blah you can do FROM blah  If you do FROM blah in your Dockerfile  but don t have a local image called blah  then Docker will try to pull it from the registry   In other words  if a Dockerfile does FROM ubuntu  but you have a local image called ubuntu different from the official one  your image will override it

User · Answer

Remember to put not only the tag but also the repository in which that tag is  this way   docker images REPOSITORY                                TAG                       IMAGE ID            CREATED             SIZE elixir                                    1 7-centos7 3             e15e6bf57262        20 hours ago        925MB   You should reference it this way   elixir 1 7-centos7 3

[docker] How can I use a local image as the base image with a dockerfile?

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