E2e tests (#249)

* Create e2e helper scripts

* Implement e2e tests

* Remove comment in e2e manifests

* Create RoleBinding in e2e namespaces

* Keep e2e namespaces optionally

* Do not automatically build images before e2e

* Update e2e tests

* Update e2e script

* Run e2e in a kind cluster

* Move e2e manifests

* Fix e2e script

* Install kubectl in travis

* Wait kind startup more

* Set env in CI

* Show cluster info

* Fix kubeconfig path in CI

* Cache image layers

* Fix range expression

* Use kubeconfig of KUBECONFIG if it exists

* Adjust port forwarding delay

* Fix e2e client initialization

* Exclude e2e tests from make test

* Create namespace per test case

* Exclude e2e tests from make coverage

.travis.yml

@@ -2,8 +2,36 @@ language: go
 go:
   - 1.x
 
+services:
+  - docker
+
+cache:
+  directories:
+    - $HOME/bin
+    - $HOME/docker
+
+env:
+  global:
+    - DOCKER_PUSH=false
+    - IMAGE_TAG=latest
+    - PATH=$HOME/bin:$PATH
+
 before_install:
+  # Load cached docker images
+  - if [[ -d $HOME/docker ]]; then ls $HOME/docker/*.tar.gz | xargs -I {file} sh -c "zcat {file} | docker load"; fi
   - go get github.com/mattn/goveralls
+  - go get sigs.k8s.io/kind
+  - if [ ! -d $HOME/bin/kubectl ]; then
+      mkdir -p $HOME/bin;
+      curl -o $HOME/bin/kubectl -L https://storage.googleapis.com/kubernetes-release/release/v1.13.4/bin/linux/amd64/kubectl;
+      chmod +x $HOME/bin/kubectl;
+    fi
+
+before_cache:
+  # Save tagged docker images
+  - >
+    mkdir -p $HOME/docker && docker images -a --filter='dangling=false' --format '{{.Repository}}:{{.Tag}} {{.ID}}'
+    | xargs -n 2 -t sh -c 'test -e $HOME/docker/$1.tar.gz || docker save $0 | gzip -2 > $HOME/docker/$1.tar.gz'
 
 install:
   - curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
@@ -14,10 +42,12 @@ script:
   - make all
   - make test coverage
   - $GOPATH/bin/goveralls -coverprofile=profile.cov -service=travis-ci
+  - make build-e2e-images
+  - make kind-e2e
 
 deploy:
   provider: releases
   api_key: $GITHUB_OAUTH_TOKEN
   skip_cleanup: true
   on:
-    tags: true
+    tags: true