From integration-cumin.integration.eqiad.wmflabs , cumin now fails to ssh to target instances :(
```
hashar@integration-cumin:~$ sudo cumin --force 'name:docker' 'hostname'
19 hosts will be targeted:
integration-slave-docker-[1001-1017,1020-1021].integration.eqiad.wmflabs
FORCE mode enabled, continuing without confirmation
===== NODE GROUP =====
(19) integration-slave-docker-[1001-1017,1020-1021].integration.eqiad.wmflabs
----- OUTPUT of 'hostname' -----
Permission denied (publickey).
================
PASS: | | 0% (0/19) [00:00<?, ?hosts/s]
FAIL: |█████████████████████████████████████████████| 100% (19/19) [00:00<00:00, 31.94hosts/s]
100.0% (19/19) of nodes failed to execute command 'hostname': integration-slave-docker-[1001-1017,1020-1021].integration.eqiad.wmflabs
0.0% (0/19) success ratio (< 100.0% threshold) for command: 'hostname'. Aborting.
0.0% (0/19) success ratio (< 100.0% threshold) of nodes successfully executed all commands. Aborting.
```
On one of the instances:
```
Jun 14 07:05:35 integration-slave-docker-1004 sshd[30650]: Connection from 10.68.18.238 port 56586 on 10.68.16.233 port 22
Jun 14 07:05:35 integration-slave-docker-1004 sshd[30650]: Connection closed by 10.68.18.238 [preauth]
```
I guess the key is not recognized somehow.