Hi Derek, You need to upgrade your Juju to 2.0.3 at least. This is a known issue (I am all thumbs so can't find the LP ref right now but there are a bunch of tickets about it)
To do so, first upgrade your controller: sudo apt update && sudo apt upgrade juju switch controller juju upgrade-juju Then upgrade units of the model juju switch <model> juju upgrade-juju If this doesn't work out for you, I had success with upgrading a controller to 2.1-beta5 by adding the devel ppa, upgrading locally, upgrading the controller, then the units. Let us know how it gets for you, Best Sam On Feb 13, 2017 21:52, "Derek DeMoss" <der...@darkhorse.com> wrote: > Hey All, > I'm getting a host key verification failure when I try to juju ssh to one > of my units. > > username@os-nuc-01:~/.ssh$ juju ssh postgresql/14 -v > OpenSSH_7.2p2 Ubuntu-4ubuntu2.1, OpenSSL 1.0.2g 1 Mar 2016 > debug1: Reading configuration data /etc/ssh/ssh_config > debug1: /etc/ssh/ssh_config line 19: Applying options for * > debug1: Connecting to <ip address> [<ip address>] port 22. > debug1: Connection established. > debug1: identity file /home/username/.local/share/juju/ssh/juju_id_rsa > type 1 > debug1: key_load_public: No such file or directory > debug1: identity file /home/username/.local/share/juju/ssh/juju_id_rsa-cert > type -1 > debug1: identity file /home/username/.ssh/id_rsa type 1 > debug1: key_load_public: No such file or directory > debug1: identity file /home/username/.ssh/id_rsa-cert type -1 > debug1: Enabling compatibility mode for protocol 2.0 > debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.1 > debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 > Ubuntu-4ubuntu2.1 > debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.1 pat OpenSSH* compat > 0x04000000 > debug1: Authenticating to <ip address>:22 as 'ubuntu' > debug1: SSH2_MSG_KEXINIT sent > debug1: SSH2_MSG_KEXINIT received > debug1: kex: algorithm: curve25519-sha...@libssh.org > debug1: kex: host key algorithm: ecdsa-sha2-nistp256 > debug1: kex: server->client cipher: chacha20-poly1...@openssh.com MAC: > <implicit> compression: none > debug1: kex: client->server cipher: chacha20-poly1...@openssh.com MAC: > <implicit> compression: none > debug1: expecting SSH2_MSG_KEX_ECDH_REPLY > debug1: Server host key: ecdsa-sha2-nistp256 SHA256: > th86nMHQbr0RyuXXnsrBbeOs2JkchFl6gXVBY7p6S2k > @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ > @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ > @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ > IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! > Someone could be eavesdropping on you right now (man-in-the-middle attack)! > It is also possible that a host key has just been changed. > The fingerprint for the ECDSA key sent by the remote host is > SHA256:th86nMHQbr0RyuXXnsrBbeOs2JkchFl6gXVBY7p6S2k. > Please contact your system administrator. > Add correct host key in /tmp/ssh_known_hosts736182584 to get rid of this > message. > Offending RSA key in /tmp/ssh_known_hosts736182584:7 > remove with: > ssh-keygen -f "/tmp/ssh_known_hosts736182584" -R <ip address> > ECDSA host key for <ip address> has changed and you have requested strict > checking. > Host key verification failed. > > > If I just do: ssh ubuntu@<unit ip address> it connects just fine. > > So my question is, where is Juju getting the original for > /tmp/ssh_known_hosts736182584:7 > > I've tried searching a bunch on my juju-controller machine, but I haven't > been able to find anything that looks like the problematic known_hosts > file... > > All the other machines/units are juju ssh-able, and I have no idea why > this one would be different [other than the drive filled up from > postgresql, and I had to clear some WAL files before things got running > again]. > > Any insight or help would be appreciated! > Derek DeMoss > Dark Horse Comics, Inc. > System Administrator I > "Truth... Is where you seek it."-Lomar > > > -- > Juju mailing list > Juju@lists.ubuntu.com > Modify settings or unsubscribe at: https://lists.ubuntu.com/ > mailman/listinfo/juju > >
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