CMD / ENTRYPOINT study

junk_dockerfile

FROM busybox

ENV name1 value1
ENTRYPOINT ["ls"]
CMD /bin/sh
CMD ["/bin/sh"]
CMD ls
CMD -l
EXPOSE 1234
ENV name2 value2

latest_layer.json

{ "Size" : 0,
  "architecture" : "amd64",
  "config" : { "AttachStderr" : false,
      "AttachStdin" : false,
      "AttachStdout" : false,
      "Cmd" : [ "/bin/sh",
          "-c",
          "-l"
        ],
      "CpuShares" : 0,
      "Cpuset" : "",
      "Domainname" : "",
      "Entrypoint" : [ "ls" ],
      "Env" : [ "HOME=/",
          "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
          "name1=value1",
          "name2=value2"
        ],
      "ExposedPorts" : { "1234/tcp" : {  } },
      "Hostname" : "f7d939e68b5a",
      "Image" : "e4c47f2ffeac651bd43139a09278f8a0a120108ba25f9908b10342c3a95108c9",
      "Memory" : 0,
      "MemorySwap" : 0,
      "NetworkDisabled" : false,
      "OnBuild" : [  ],
      "OpenStdin" : false,
      "PortSpecs" : null,
      "StdinOnce" : false,
      "Tty" : false,
      "User" : "",
      "Volumes" : null,
      "WorkingDir" : ""
    },
  "container" : "6a64a9bd89ce0f51ddba6260307d28f31f33c6f442e91622e7bb32397f84e4a1",
  "container_config" : { "AttachStderr" : false,
      "AttachStdin" : false,
      "AttachStdout" : false,
      "Cmd" : [ "/bin/sh",
          "-c",
          "#(nop) ENV name2=value2"
        ],
      "CpuShares" : 0,
      "Cpuset" : "",
      "Domainname" : "",
      "Entrypoint" : [ "ls" ],
      "Env" : [ "HOME=/",
          "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
          "name1=value1",
          "name2=value2"
        ],
      "ExposedPorts" : { "1234/tcp" : {  } },
      "Hostname" : "f7d939e68b5a",
      "Image" : "e4c47f2ffeac651bd43139a09278f8a0a120108ba25f9908b10342c3a95108c9",
      "Memory" : 0,
      "MemorySwap" : 0,
      "NetworkDisabled" : false,
      "OnBuild" : [  ],
      "OpenStdin" : false,
      "PortSpecs" : null,
      "StdinOnce" : false,
      "Tty" : false,
      "User" : "",
      "Volumes" : null,
      "WorkingDir" : ""
    },
  "created" : "2014-09-04T18:41:52.84618525Z",
  "docker_version" : "1.1.2",
  "id" : "907974ccf0eb0e5a87468669f4b2d181e475a30fca69cf50d82cff2d9000da1a",
  "os" : "linux",
  "parent" : "e4c47f2ffeac651bd43139a09278f8a0a120108ba25f9908b10342c3a95108c9"
}