You probably want to update this to etcd v3, the commands are quite different.

Thanks, great book!!

Yes. During my final review before the book went into production, I realized I should at least mention the difference between v2 and v3. I didn't want to change the whole section, because some setups still use v2, so I just added a callout explaining how to retrieve keys with etcdctl get --prefix=true. I hope that'll make most readers happy.

It's hard to decide what to put in a book if the technology it's describing is changing so rapidly.

Thanks.