Configure kind to use Travis' registry mirror (#57)

Author: briandealwis

.travis.yml

@@ -6,13 +6,23 @@ install:
   - mkdir -p $HOME/bin
   - curl -Lo $HOME/bin/skaffold https://storage.googleapis.com/skaffold/releases/latest/skaffold-linux-amd64
   - curl -Lo $HOME/bin/container-structure-test https://storage.googleapis.com/container-structure-test/latest/container-structure-test-linux-amd64
-  - curl -Lo $HOME/bin/kind https://github.com/kubernetes-sigs/kind/releases/download/v0.7.0/kind-linux-amd64
+  - curl -Lo $HOME/bin/kind https://github.com/kubernetes-sigs/kind/releases/download/v0.9.0/kind-linux-amd64
   - curl -Lo $HOME/bin/kubectl https://storage.googleapis.com/kubernetes-release/release/v1.18.0/bin/linux/amd64/kubectl
   - chmod +x $HOME/bin/*
   - export PATH=$HOME/bin:$PATH
 
 script:
   - skaffold build -p local
-  # we had `run-its.sh` in`after_success` but it doesn't cause failures
+
+  # Create a kind configuration to use the docker daemon's configured
+  # registry-mirrors.
+  - |
+    docker system info --format '{{printf "apiVersion: kind.x-k8s.io/v1alpha4\nkind: Cluster\ncontainerdConfigPatches:\n"}}{{range $reg, $config := .RegistryConfig.IndexConfigs}}{{if $config.Mirrors}}{{printf "- |-\n  [plugins.\"io.containerd.grpc.v1.cri\".registry.mirrors.\"%s\"]\n    endpoint = %q\n" $reg $config.Mirrors}}{{end}}{{end}}' > /tmp/kind.config
+
   # `kind create cluster` is very verbose
-  - kind create cluster -q && kind get kubeconfig > /tmp/kube.config && KUBECONFIG=/tmp/kube.config bash ./run-its.sh
+  - kind create cluster --quiet --config /tmp/kind.config
+  - kind get kubeconfig > /tmp/kube.config
+
+  # we had `run-its.sh` in `after_success` but it doesn't cause failures
+  - KUBECONFIG=/tmp/kube.config bash ./run-its.sh
+