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Adds info on how to get env vars from container

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Currently the docs just say "let's go into the container and look at the
env vars", but doesn't show how to do it.  It is also not currently
possible to enter the container as it is written in the doc
( container started with app.py and then somehow later on we have a
shell in the same container )

Docker-DCO-1.1-Signed-off-by: Brian Goff <cpuguy83@gmail.com> (github: cpuguy83)
This commit is contained in:
Brian Goff 2014-06-12 09:26:55 -07:00
parent dbee7dd69e
commit fbf7815b25
1 changed files with 4 additions and 7 deletions
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11
docs/sources/userguide/dockerlinks.md
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@ -171,14 +171,11 @@ child container in two ways:
* Environment variables, * Environment variables,
* Updating the `/etc/host` file. * Updating the `/etc/host` file.
Let's look first at the environment variables Docker sets. Inside the `web` Let's look first at the environment variables Docker sets. Let's run the `env`
container let's run the `env` command to list the container's environment command to list the container's environment variables.
variables. $docker run --rm --link --name web2 db:db training/webapp env
root@aed84ee21bde:/opt/webapp# env
HOSTNAME=aed84ee21bde
. . . . . .
DB_NAME=/web/db DB_NAME=/web2/db
DB_PORT=tcp://172.17.0.5:5432 DB_PORT=tcp://172.17.0.5:5432
DB_PORT_5000_TCP=tcp://172.17.0.5:5432 DB_PORT_5000_TCP=tcp://172.17.0.5:5432
DB_PORT_5000_TCP_PROTO=tcp DB_PORT_5000_TCP_PROTO=tcp