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Merge pull request #15450 from liubin/liubin/change-port-number-through-example 

change port number through example context
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moxiegirl 2015-08-12 09:49:50 -07:00
parent e82358586d b0a65f93a5
commit 8a0efadee1
1 changed files with 4 additions and 4 deletions
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8
docs/userguide/dockerlinks.md
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@ -227,11 +227,11 @@ The components in this prefix are:
Docker uses this prefix format to define three distinct environment variables: Docker uses this prefix format to define three distinct environment variables:
* The `prefix_ADDR` variable contains the IP Address from the URL, for * The `prefix_ADDR` variable contains the IP Address from the URL, for
example `WEBDB_PORT_8080_TCP_ADDR=172.17.0.82`. example `WEBDB_PORT_5432_TCP_ADDR=172.17.0.82`.
* The `prefix_PORT` variable contains just the port number from the URL for * The `prefix_PORT` variable contains just the port number from the URL for
example `WEBDB_PORT_8080_TCP_PORT=8080`. example `WEBDB_PORT_5432_TCP_PORT=5432`.
* The `prefix_PROTO` variable contains just the protocol from the URL for * The `prefix_PROTO` variable contains just the protocol from the URL for
example `WEBDB_PORT_8080_TCP_PROTO=tcp`. example `WEBDB_PORT_5432_TCP_PROTO=tcp`.
If the container exposes multiple ports, an environment variable set is If the container exposes multiple ports, an environment variable set is
defined for each one. This means, for example, if a container exposes 4 ports defined for each one. This means, for example, if a container exposes 4 ports
@ -240,7 +240,7 @@ that Docker creates 12 environment variables, 3 for each port.
Additionally, Docker creates an environment variable called `<alias>_PORT`. Additionally, Docker creates an environment variable called `<alias>_PORT`.
This variable contains the URL of the source container's first exposed port. This variable contains the URL of the source container's first exposed port.
The 'first' port is defined as the exposed port with the lowest number. The 'first' port is defined as the exposed port with the lowest number.
For example, consider the `WEBDB_PORT=tcp://172.17.0.82:8080` variable. If For example, consider the `WEBDB_PORT=tcp://172.17.0.82:5432` variable. If
that port is used for both tcp and udp, then the tcp one is specified. that port is used for both tcp and udp, then the tcp one is specified.
Finally, Docker also exposes each Docker originated environment variable Finally, Docker also exposes each Docker originated environment variable