travis: add docker build for images (#38)

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

.travis.yml

@@ -0,0 +1,12 @@
+sudo: required
+
+services:
+- docker
+
+install:
+- curl -Lo skaffold https://storage.googleapis.com/skaffold/releases/v0.12.0/skaffold-linux-amd64
+- chmod +x skaffold
+- sudo mv skaffold /usr/local/bin
+
+script:
+- skaffold build --profile travis-ci

skaffold.yaml

@@ -45,15 +45,22 @@ deploy:
     manifests:
     - ./kubernetes-manifests/**.yaml
     
-# "gcb" profile allows building and pushing the images
-# on Google Container Builder without requiring docker
-# installed on the developer machine. However, note that
-# since GCB does not cache the builds, each build will
-# start from scratch and therefore take a long time.
-#
-# This is not used by default. To use it, run:
-#     skaffold run -p gcb
+
 profiles:
+  # "travis-ci" profile is used to build the images without
+  # pushing them.
+  - name: travis-ci
+    build:
+      local:
+        skipPush: true
+  # "gcb" profile allows building and pushing the images
+  # on Google Container Builder without requiring docker
+  # installed on the developer machine. However, note that
+  # since GCB does not cache the builds, each build will
+  # start from scratch and therefore take a long time.
+  #
+  # This is not used by default. To use it, run:
+  #     skaffold run -p gcb
   - name: gcb
     build:
       googleCloudBuild: