etcdctl complete delete wipe

[vorburger]

For local testing, I find myself wanting to just completely "wipe" any data etcd from the CLI with etcdctl :

https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-reset/ proposes this, but NOK:

$ etcdctl del "" --prefix
No help topic for 'del'

$ etcdctl rm -r ""
$ Error:  107: Root is read only (/) [3]

Currently I do it like this, but this of course feels more like a workaround:

$ sudo systemctl stop etcd
$ sudo rm -rf /var/lib/etcd/default.etcd
$ sudo systemctl start etcd

PS: Old and close #2385 had something similar, it seems.

[hexfusion]

@vorburger does ETCDCTL_API=3 etcdctl del "" --from-key=true do the trick?

[vorburger]

@hexfusion oh. Yeah - that seems to work great; thanks!

[iofirag]

ETCDCTL_API=3 etcdctl del "*" --from-key=tru

[bootjp]

Thank you for this issue.
An example implementation in jetcd (Java etcd client) is below for reference.

var kvClient = client.getKVClient();

var end = OptionsUtil.prefixEndOf(ByteSequence.from(new byte[]{}));
DeleteResponse deleteResponse = kvClient.delete(
    ByteSequence.from(ByteString.copyFromUtf8("*")),
    DeleteOption.builder().isPrefix(true)
        .withRange(end)
        .build()
).get();