MetroAE does not require that you have used it to install when you want to use it for upgrade or health checking. We 100% support working for this use case. There is an additional requirement for such a use case, however: You must manually copy ssh keys to the Nuage components before executing MetroAE.

You must manually copy under these conditions:

• Your Nuage deployment was installed without using MetroAE
• Your Nuage deployment was installed *using* MetroAE, but you are executing the ./metroae command from a different MetroAE host

In these cases, you must manually copy your MetroAE user’s ssh public key to the VSD and the other Linux-based components. This also applies to your Linux-based hypervisors. For example:

ssh-copy-id root@vsd.host.name

When the ssh key has not been copied, we can see errors such as this one, waiting for SSH on the VSD:

./metroae vsp_preupgrade_health -vvvv
 
fatal: [host.domain.com -> localhost]: FAILED! => {
    "attempts": 20,
    "changed": true,
    "cmd": [
        "ssh",
        "-oStrictHostKeyChecking=no",
        "-oPasswordAuthentication=no",
        "root@1.1.1.1",
        "exit"
    ],
    "delta": "0:00:00.095693",
    "end": "2018-12-03 14:29:06.209871",
    "failed": true,
    "invocation": {
        "module_args": {
            "_raw_params": "ssh -oStrictHostKeyChecking=no -oPasswordAuthentication=no root@1.1.1.1 exit",
            "_uses_shell": false,
            "chdir": null,
            "creates": null,
            "executable": null,
            "removes": null,
            "stdin": null,
            "warn": true
        }
    },
    "msg": "non-zero return code",
    "rc": 255,
    "start": "2018-12-03 14:29:06.114178",
    "stderr": "Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).",
    "stderr_lines": [
        "Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password)."
    ],
    "stdout": "",
    "stdout_lines": []
}

This error will be resolved when the key has been copied.