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Add the ENV instruciton to the docker builder documentation

Guillaume J. Charmes 12 年之前
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共有 1 个文件被更改,包括 10 次插入1 次删除
  1. 10 1
      docs/sources/builder/basics.rst

+ 10 - 1
docs/sources/builder/basics.rst

@@ -66,7 +66,16 @@ It is equivalent to do `docker commit -run '{"Cmd": <command>}'` outside the bui
 The `EXPOSE` instruction sets ports to be publicly exposed when running the image.
 This is equivalent to do `docker commit -run '{"PortSpecs": ["<port>", "<port2>"]}'` outside the builder.
 
-2.6 INSERT
+2.6 ENV
+-------
+    ``ENV <key> <value>``
+
+The `ENV` instruction set as environment variable `<key>` with the value `<value>`. This value will be passed to all future ``RUN`` instructions.
+
+.. note::
+    The environment variables are local to the Dockerfile, they will not be set as autorun.
+
+2.7 INSERT
 ----------
 
     ``INSERT <file url> <path>``