Note

Source code for this example available in ./examples/kubernetes/consistenthash

Distributed Build with Consistent Hashing

Demo for efficiently using BuildKit daemon-local cache with multi-node cluster

Deploy

$ kubectl apply -f ../statefulset.rootless.yaml
$ kubectl scale --replicas=10 statefulset/buildkitd

Consistent hashing

Define the key string for consistent hashing.

For example, the key can be defined as <REPO NAME>:<CONTEXT PATH>, e.g. github.com/example/project:some/directory.

Then determine the pod that corresponds to the key:

$ go build -o consistenthash .
$ pod=$(./show-running-pods.sh | consistenthash $key)

You can connect to the pod using export BUILDKIT_HOST=kube-pod://$pod.