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Merge pull request #10816 from SvenDowideit/docker-build-return-code

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Add some information about the docker build return code
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Jessie Frazelle 2015-03-16 17:18:26 -07:00
commit c7f5ee9d69
1 changed files with 23 additions and 0 deletions
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23
docs/sources/reference/commandline/cli.md
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@ -537,6 +537,29 @@ If you use STDIN or specify a `URL`, the system places the contents into a
file called `Dockerfile`, and any `-f`, `--file` option is ignored. In this
scenario, there is no context.
### Return code
On a successful build, a return code of success `0` will be returned.
When the build fails, a non-zero failure code will be returned.
There should be informational output of the reason for failure output
to `STDERR`:
```
$ docker build -t fail .
Sending build context to Docker daemon 2.048 kB
Sending build context to Docker daemon
Step 0 : FROM busybox
---> 4986bf8c1536
Step 1 : RUN exit 13
---> Running in e26670ec7a0a
INFO[0000] The command [/bin/sh -c exit 13] returned a non-zero code: 13
$ echo $?
1
```
### .dockerignore file
If a file named `.dockerignore` exists in the root of `PATH` then it
is interpreted as a newline-separated list of exclusion patterns.
Exclusion patterns match files or directories relative to `PATH` that