TF2OpenAPI Dockerfile + CloudBuild trigger (kubeflow#262)

* Add Dockerfile and GCB for pushing to GCR

* Fix typo in cloudbuild command

hack/generate-cloudbuild-triggers.sh

@@ -4,6 +4,6 @@ CONFIGS=$(find $DIR/../release | grep yaml)
 
 # Not currently idempotent! Use with care. Will be resolve in July 2019
 for CONFIG in $CONFIGS; do
-    gcloud alpha builds triggers create github --project kfserving --trigger_config $CONFIG
+    gcloud alpha builds triggers create github --project kfserving --trigger-config $CONFIG
 done
 

release/triggers/tf2openapi.yaml

@@ -0,0 +1,31 @@
+---
+### Specify as necessary ###
+description: TF2OpenAPI Autobuilder
+substitutions:
+  _COMPONENT: "tf2openapi"
+  _DOCKERFILE: "./tools/tf2openapi/Dockerfile"
+  _CONTEXT: "."
+###########################
+github:
+  owner: kubeflow
+  name: kfserving
+  push:
+    tag: v0.*.*
+### Specify as necessary ###
+includedFiles:
+- tools/tf2openapi/**
+- vendor/**
+- pkg/**
+###########################
+build:
+  steps:
+  - name: docker
+    args:
+    - "build"
+    - "-t"
+    - "gcr.io/$REPO_NAME/${_COMPONENT}:$TAG_NAME"
+    - "-f"
+    - "${_DOCKERFILE}"
+    - "${_CONTEXT}"
+  images:
+  - gcr.io/$REPO_NAME/${_COMPONENT}:$TAG_NAME

tools/tf2openapi/Dockerfile

@@ -0,0 +1,17 @@
+# Build the manager binary
+FROM golang:1.10.3 as builder
+
+# Copy in the go src
+WORKDIR /go/src/github.com/kubeflow/kfserving
+COPY vendor/ vendor/
+COPY tools/  tools/
+COPY pkg/    pkg/
+
+# Build
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o tf2openapi ./tools/tf2openapi/cmd
+
+# Copy tf2openapi into a thin image
+FROM ubuntu:latest
+WORKDIR /
+COPY --from=builder /go/src/github.com/kubeflow/kfserving/tf2openapi .
+ENTRYPOINT ["/tf2openapi"]