Merge pull request jenkinsci#87 from stevekuznetsov/skuznets/mount-shared

Label the Docker workspace volume mount shared

Author: jglick

src/main/java/org/jenkinsci/plugins/docker/workflow/WithContainerStep.java

@@ -132,16 +132,15 @@ public static class Execution extends AbstractStepExecutionImpl {
             toolName = step.toolName;
             DockerClient dockerClient = new DockerClient(launcher, node, toolName);
 
-            // Add a warning if the docker version is less than 1.4
             VersionNumber dockerVersion = dockerClient.version();
             if (dockerVersion != null) {
-                if (dockerVersion.isOlderThan(new VersionNumber("1.4"))) {
-                    throw new AbortException("The docker version is less than v1.4. Pipeline functions requiring 'docker exec' will not work e.g. 'docker.inside'.");
+                if (dockerVersion.isOlderThan(new VersionNumber("1.7"))) {
+                    throw new AbortException("The docker version is less than v1.7. Pipeline functions requiring 'docker exec' (e.g. 'docker.inside') or SELinux labeling will not work.");
                 } else if (dockerVersion.isOlderThan(new VersionNumber("1.8"))) {
                     listener.error("The docker version is less than v1.8. Running a 'docker.inside' from inside a container will not work.");
                 }
             } else {
-                listener.error("Failed to parse docker version. Please note there is a minimum docker version requirement of v1.4.");
+                listener.error("Failed to parse docker version. Please note there is a minimum docker version requirement of v1.7.");
             }
 
             FilePath tempDir = tempDir(workspace);

src/main/java/org/jenkinsci/plugins/docker/workflow/client/DockerClient.java

@@ -110,7 +110,7 @@ public String run(@Nonnull EnvVars launchEnv, @Nonnull String image, @CheckForNu
             argb.add("-w", workdir);
         }
         for (Map.Entry<String, String> volume : volumes.entrySet()) {
-            argb.add("-v", volume.getKey() + ":" + volume.getValue() + ":rw");
+            argb.add("-v", volume.getKey() + ":" + volume.getValue() + ":rw,z");
         }
         for (String containerId : volumesFromContainers) {
             argb.add("--volumes-from", containerId);