failed=1 with ansible_password set.
TASK [k3s-cluster-setup : Install k3s masters] ******************************************************************************************************* failed: [localhost] (item=192.168.1.125) => {"ansible_loop_var": "item", "changed": false, "item": "192.168.1.125", "msg": "Failed to install install: 2022/05/23 15:22:08 192.168.1.125\nError: unable to connect to 192.168.1.125:22 over ssh: ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain\n"}
Resolved with uploading your public key:
ssh-copy-id -i ~/.ssh/mykey user@host