A ZooKeeper "personality" for etcd. Point a ZooKeeper client at zetcd to dispatch the operations on an etcd cluster.

Protocol encoding and decoding heavily based on go-zookeeper.

Forward ZooKeeper requests on :2181 to an etcd server listening on localhost:2379:

go install github.com/mauri870/zetcd/cmd/zetcd@latest
zetcd --zkaddr 0.0.0.0:2181 --endpoints localhost:2379

For simplicity, zetcd can also start its own embedded etcd server. This is useful for testing or development purposes:

zetcd --zkaddr 0.0.0.0:2181 --endpoints localhost:2379 --embedded-etcd

Simple testing with zkctl:

go install github.com/mauri870/zetcd/cmd/zkctl@latest
zkctl watch / &
zkctl create /abc "foo"

Official docker images of tagged zetcd releases for containerized environments are hosted at quay.io/etcd-io/zetcd. Use docker run to launch the zetcd container with the same configuration as the go get example:

docker run --net host -t quay.io/etcd-io/zetcd -endpoints localhost:2379

In cross-checking mode, zetcd dynamically tests a fresh isolated "candidate" zetcd cluster against a fresh isolated ZooKeeper "oracle" cluster for divergences. This mode dispatches requests to both zetcd and ZooKeeper, then compares the responses to check for equivalence. If the responses disagree, it is flagged in the logs. Use the flags -zkbridge to configure a ZooKeeper endpoint and -oracle zk to enable checking.

Cross-check zetcd's ZooKeeper emulation with a native ZooKeeper server endpoint at localhost:2182 like so:

zetcd --zkaddr 0.0.0.0:2181 --endpoints localhost:2379 --debug-zkbridge localhost:2182  --debug-oracle zk --logtostderr -v 9

• Mailing list: etcd-dev
• Slack: #etcd channel on Kubernetes (get an invite)
• Bugs: issues

See CONTRIBUTING for details on submitting patches and the contribution workflow.

zetcd is under the Apache 2.0 license. See the LICENSE file for details.