How to pass arguments within docker-compose

Question

Docker 1 9 allows to pass arguments to a dockerfile   See link  https   docs docker com engine reference builder  arg    How can I pass the same arguments within docker-compose yml  Please provide an example too  if possible

User · Answer

Now docker-compose supports variable substitution   Compose uses the variable values from the shell environment in which docker-compose is run  For example  suppose the shell contains POSTGRES VERSION 9 3 and you supply this configuration in your docker-compose yml file   db    image   postgres   POSTGRES VERSION     When you run docker-compose up with this configuration  Compose looks for the POSTGRES VERSION environment variable in the shell and substitutes its value in  For this example  Compose resolves the image to postgres 9 3 before running the configuration

User · Answer

This can now be done as of docker-compose v2  as part of the build object       docker-compose yml   version   2  services      my image name          build              context     current dir as build context             args                  var1  1                 var2  c   See the docker compose docs   In the above example  var1  and  var2  will be sent to the build environment   Note  any env variables  specified by using the environment block  which have the same name as args variable s  will override that variable

User · Answer

This feature was added in Compose 1 6    Reference  https   docs docker com compose compose-file  args  services    web      build        context          args          FOO  foo

[docker] How to pass arguments within docker-compose?

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