Comment 8 for bug 1625611

Hi Denis

Thank you for your comment.

I resolved this problem.
I report you that how to resolve in my environment.

Resolve procedure:
1. FuelSlaveNode login
2. gpg --recv-keys BCE5CC461FA22B08
3. apt-key list
--> Check: The [fuel-infra (Example key) <email address hidden>] Key does not exsist.
4. gpg -a --export BCE5CC461FA22B08 | apt-key add -
5. apt-key list
--> Check: The [fuel-infra (Example key) <email address hidden>] Key does exsist.
6. apt-get update
--> Check: To no output "GPG error" of the message.
7. Repeat 1-6 procedure in the other Fuel slave node.

I could update from 9.0 to 9.1.

And I tried to execute your command.
show you following.

----
[root@fuel ~]# fuel node
id | status | name | cluster | ip | mac | roles | pending_roles | online | group_id
---+-----------+------------------+---------+---------------+-------------------+------------+---------------+--------+---------
 1 | deploying | Untitled (a4:6c) | 1 | 192.168.114.3 | 00:0c:29:1e:a4:6c | controller | | 1 | 1
 2 | deploying | Untitled (d1:52) | 1 | 192.168.114.2 | 00:0c:29:d9:d1:52 | compute | | 1 | 1
[root@fuel ~]# ssh 192.168.114.3
Warning: Permanently added '192.168.114.3' (ECDSA) to the list of known hosts.
Welcome to Ubuntu 14.04.5 LTS (GNU/Linux 3.13.0-98-generic x86_64)

 * Documentation: https://help.ubuntu.com/
New release '16.04.1 LTS' available.
Run 'do-release-upgrade' to upgrade to it.

Last login: Thu Oct 20 05:12:53 2016 from 192.168.114.100
root@node-1:~# apt-cache policy nailgun-mcagents
nailgun-mcagents:
  Installed: 9.0.0-1~u14.04+mos774
  Candidate: 9.0.0-1~u14.04+mos774
  Version table:
 *** 9.0.0-1~u14.04+mos774 0
       1050 http://mirror.fuel-infra.org/mos-repos/ubuntu/9.0/ mos9.0-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     9.0.0-1~u14.04+mos750 0
       1050 http://192.168.114.100:8080/mitaka-9.0/ubuntu/x86_64/ mos9.0/main amd64 Packages
root@node-1:~#
----