linuxkit/projects/demo/etcd

This directory contains scripts/files to bootstrap a etcd cluster.

In the local, hyperkit based, setup, we use a etcd running in a Docker for Mac container to bootstrap the cluster. For a cloud based demo, we'd use https://discovery.etcd.io. The host/DfM side is setup with dfm-setup.sh.

The moby etcd package is build with build-pkg.sh. It take the official etcd container and adds a script to start etcd.

Simple single node cluster

• Edit ./dfm-setup.sh and set NUMPEERS to 1
• Start the etcd bootstrap container in on window:

./dfm-setup.sh

• In another window build/run the moby image:

./build-pkg.sh
moby build etcd
moby run etcd

InfraKit cluster setup

This should create a HyperKit based, InfraKit managed etcd cluster with 5 etcd instances.

Infrakit setup

You need the infrakit binaries for this. I normally compile from source using make build-in-container. The below was tried with commit cb420e3e50ea60afe58538b1d3cab1cb14059433.

• Make sure you start from scratch

rm -rf ~/.infrakit

• Start the infrakit plugins, each in it's own window from the root of the infrakit source tree:

./build/infrakit-group-default

./build/infrakit-flavor-vanilla

• Start the hyperkit instance plugin from this directory:

../../../bin/infrakit-instance-hyperkit

etcd setup

• Start the bootstrap etcd:

./dfm-setup.sh

• Commit the infrakit config:

~/src/docker/infrakit/build/infrakit group commit infrakit.json

To check if everything is fine, note down the IP address from one of the nodes and then:

docker run --rm -t quay.io/coreos/etcd:v3.1.5 etcdctl --endpoints http://192.168.65.24:2379 member list