Merge pull request #1157 from tonistiigi/travis-logs

travis: print main buildkit logs on job failure

.travis.yml

@@ -2,10 +2,14 @@ dist: trusty
 sudo: required
 
 install:
-  - docker run --name buildkit --rm -d --privileged -p 1234:1234 $REPO_SLUG_ORIGIN --addr tcp://0.0.0.0:1234 --oci-worker-gc=false
+  - docker run --name buildkit --rm -d --privileged -p 1234:1234 $REPO_SLUG_ORIGIN --debug --addr tcp://0.0.0.0:1234 --oci-worker-gc=false
   - sudo docker cp buildkit:/usr/bin/buildctl /usr/bin/
   - export BUILDKIT_HOST=tcp://0.0.0.0:1234
 
+after_failure:
+  - docker logs buildkit
+  - sudo dmesg
+
 env:
   global:
     - PLATFORMS="linux/amd64,linux/arm/v7,linux/arm64,linux/s390x,linux/ppc64le"