KubeCon + CloudNativeCon Europe 2019

This repository contains the demos for the presentation Reproducible development and deployment with Bazel and Telepresence.

Reproducible builds with Bazel

The first two commands from this demo are Golang-oriented. They have been included to show how Bazel creates a dependency graph.

• The first command will generate default Golang BUILD files for all the packages in the project.
• The second command will import the dependencies from the Golang package manager.
• The third command will execute the build of the application itself.

bazel run :gazelle
bazel run :gazelle -- update-repos -from_file=go.mod
bazel build //cmd/...

Interactive development with Telepresence

• The first command will spawn a new deployment inside the remote cluster.
• The second command will swap an existing deployment ant take it over.
• The third command will spawn a new deployment via traffic forwarding from the debian Docker image.

telepresence
telepresence --swap-deployment demo-app
telepresence --docker-run -it debian

Containerized development environment

• The first command will prune the local Docker instance from all the resources. This will ensure a clean workspace.
• The second command will build the Bazel Docker image and tag it with the version 0.25.2.
• The third command will execute the image with no arguments (by default the version is printed).

docker system prune --all
docker build -t kubecon-bazel:0.25.2 -f build/Dockerfile .
docker run kubecon-bazel:0.25.2

Run local containerized applications in the Cloud

• The first command will load the Bazel distroless image into the local Docker registry.
• The second command will open a two-way communication proxy between the local container and the remote cluster.

bazel run :register-image
telepresence --docker-run k8s.io/kubecon-bazel-telepresence:latest