Commit Graph

9 Commits

Author SHA1 Message Date
Sebastiaan van Stijn f2424bd375
Fix labels copying value from environment variables
This patch fixes a bug where labels use the same behavior as `--env`, resulting
in a value to be copied from environment variables with the same name as the
label if no value is set (i.e. a simple key, no `=` sign, no value).

An earlier pull request addressed similar cases for `docker run`;
2b17f4c8a8, but this did not address the
same situation for (e.g.) `docker service create`.

Digging in history for this bug, I found that use of the `ValidateEnv`
function for  labels was added in the original implementation of the labels feature in
abb5e9a077 (diff-ae476143d40e21ac0918630f7365ed3cR34)

However, the design never intended it to expand environment variables,
and use of this function was either due to either a "copy/paste" of the
equivalent `--env` flags, or a misunderstanding (the name `ValidateEnv` does
not communicate that it also expands environment variables), and the existing
`ValidateLabel` was designed for _engine_ labels (which required a value to
be set).

Following the initial implementation, other parts of the code followed
the same (incorrect) approach, therefore leading the bug to be introduced
in services as well.

This patch:

- updates the `ValidateLabel` to match the expected validation
  rules (this function is no longer used since 31dc5c0a9a),
  and the daemon has its own implementation)
- corrects various locations in the code where `ValidateEnv` was used instead of `ValidateLabel`.

Before this patch:

```bash
export SOME_ENV_VAR=I_AM_SOME_ENV_VAR
docker service create --label SOME_ENV_VAR --tty --name test busybox

docker service inspect --format '{{json .Spec.Labels}}' test
{"SOME_ENV_VAR":"I_AM_SOME_ENV_VAR"}
```

After this patch:

```bash
export SOME_ENV_VAR=I_AM_SOME_ENV_VAR
docker service create --label SOME_ENV_VAR --tty --name test busybox

docker container inspect --format '{{json .Config.Labels}}' test
{"SOME_ENV_VAR":""}
```

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2019-03-19 03:01:57 +01:00
Kir Kolyshkin 6f8070deb2 Switch from x/net/context to context
Since go 1.7, "context" is a standard package. Since go 1.9,
x/net/context merely provides some types aliased to those in
the standard context package.

The changes were performed by the following script:

for f in $(git ls-files \*.go | grep -v ^vendor/); do
	sed -i 's|golang.org/x/net/context|context|' $f
	goimports -w $f
	for i in 1 2; do
		awk '/^$/ {e=1; next;}
			/\t"context"$/ {e=0;}
			{if (e) {print ""; e=0}; print;}' < $f > $f.new && \
				mv $f.new $f
		goimports -w $f
	done
done

[v2: do awk/goimports fixup twice]
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
2018-05-11 16:49:43 -07:00
khaled souf 57c1551991 adding unit tests to network
Signed-off-by: khaled souf <khaled.souf@gmail.com>
2017-07-06 00:54:30 +02:00
Vincent Demeester 44ac80881f
Update vendoring of docker/docker
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
2017-06-06 00:23:21 +02:00
Alessandro Boch b5e43fb5ec Add support for config-only, config-from and scope options
- To promote a network to swarm mode

Signed-off-by: Alessandro Boch <aboch@docker.com>
2017-05-17 17:17:50 -07:00
Vincent Demeester d7f6563efc
Update cli imports to using local package
Also, rename a bunch of variable to not *shadow* the `opts` package
name.

Signed-off-by: Vincent Demeester <vincent@sbr.pm>
2017-05-15 14:45:19 +02:00
Daniel Nephin 08af0f28c5 Add gocycle lint
Whitelist some existing offenders, and use a high limit for now.
This limit should decrese over time.

Signed-off-by: Daniel Nephin <dnephin@docker.com>
2017-05-02 17:57:46 -04:00
Daniel Nephin 10641c2aae Update imports.
Signed-off-by: Daniel Nephin <dnephin@docker.com>
2017-04-17 18:07:56 -04:00
Daniel Nephin 1630fc40f8 Import docker/docker/cli
Signed-off-by: Daniel Nephin <dnephin@gmail.com>
2017-04-17 17:40:59 -04:00