etcd is A distributed, reliable key-value store for the most critical data of a distributed system.
学习 etcd 最好的方式是先安装一个 etcd 的试验环境，如果你想要在自己的本机或者虚拟机系统安装 etcd 软件包可以使用下面的命令
Local machine install etcd
ETCD_VER=v3.3.8
# choose either URL
GOOGLE_URL=https://storage.googleapis.com/etcd
GITHUB_URL=https://github.com/coreos/etcd/releases/download
DOWNLOAD_URL=${GITHUB_URL}
rm -f /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz
rm -rf /tmp/etcd-download-test && mkdir -p /tmp/etcd-download-test
wget ${DOWNLOAD_URL}/${ETCD_VER}/etcd-${ETCD_VER}-linux-amd64.tar.gz -O /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz
tar xzvf /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz -C /tmp/etcd-download-test --strip-components=1
mv /tmp/etcd-download-test/etcd* /bin/
rm -rf /tmp/etcd-download-test
rm -f /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz
etcd --version
ETCDCTL_API=3 etcdctl version
如果你喜欢使用 Docker 环境来练习，则可以使用下面的命令
docker run -d -p 4001:4001 -p 2480:2380 -p 2479:2379 --name etcd gcr.io/etcd-development/etcd:v3.3.8 /usr/local/bin/etcd --listen-client-urls http://0.0.0.0:2379 --advertise-client-urls http://0.0.0.0:2379
https://docs.microsoft.com/en-us/windows/wsl/install-win10#install-the-windows-subsystem-for-linux
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