etcd (v3.4): Quick Start on Mac

This post describes how to use etcd on Mac.


what is etcd?

etcd is an open source KVS. It is also one of k8s core components.

This YouTube video from IBM Cloud is great to understand its features:

https://www.youtube.com/watch?v=OmphHSaO1sE


install

% brew install etcd

% etcd --version
etcd Version: 3.4.15
Git SHA: Not provided (use ./build instead of go build)
Go Version: go1.16
Go OS/Arch: darwin/amd64

% etcdctl version  
etcdctl version: 3.4.15
API version: 3.4


run

$ etcd


usage

The following lists the available command options (version 3.4), which are used in this post.

% etcdctl help
COMMANDS:
	del			Removes the specified key or range of keys [key, range_end)
	get			Gets the key or a range of keys
	put			Puts the given key into the store


CRUD

% etcdctl put key1 val1
OK
% etcdctl get key1     
key1
val1
% etcdctl put key1 val2
OK
% etcdctl get key1     
key1
val2
% etcdctl del key1     
1
% etcdctl get key1
%


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