[ovirt-users] hosted-Engine setup: hostname 'node01.example.com' doesn't uniquely match the interface selected for the management bridge

[Yedidyah Bar David]

On Tue, Jul 5, 2016 at 5:56 PM, mots <mots at nepu.moe> wrote:
> Hello,
>
> I'm trying to install Ovirt 4 on a new set of hosts. During "hosted-engine --deploy" I get the following error: (personal information is replaced with generic placeholders)
>
> [ INFO  ] Stage: Setup validation
> [ ERROR ] Failed to execute stage 'Setup validation': hostname 'node01.example.com' doesn't uniquely match the interface 'ens802f1' selected for the management bridge; it matches also interface with IP set(['192.168.99.10']). Please make sure that the hostname got from the interface for the management network resolves only there.
> [ INFO  ] Stage: Clean up
> [ INFO  ] Generating answer file '/var/lib/ovirt-hosted-engine-setup/answers/answers-20160705144908.conf'
> [ INFO  ] Stage: Pre-termination
> [ INFO  ] Stage: Termination
> [ ERROR ] Hosted Engine deployment failed: this system is not reliable, please check the issue, fix and redeploy
>           Log file is located at /var/log/ovirt-hosted-engine-setup/ovirt-hosted-engine-setup-20160705144711-tl98lx.log
>
> That IP "192.168.99.10" doesn't resolve to anything, because I haven't added it to the DNS server. It's also not in /etc/hosts.
> It's just the IP for the storage network that doesn't use DNS at all.
>
> From the log:
>
> 2016-07-05 14:49:08 DEBUG otopi.plugins.gr_he_common.network.bridge bridge._get_hostname_from_bridge_if:274 Network info: {'netmask': u'255.255.255.0', 'ipaddr': u'192.168.10.194', 'gateway': u'192.168.10.2'}

Meaning the interface ens802f1 has address 192.168.10.194

> 2016-07-05 14:49:08 DEBUG otopi.plugins.gr_he_common.network.bridge bridge._get_hostname_from_bridge_if:310 hostname: 'node01.example.com', aliaslist: '[]', ipaddrlist: '['192.168.99.10', '192.168.10.194']'

This is the result of:

python -c 'import socket; print(socket.gethostbyaddr("192.168.10.194"));'

> 2016-07-05 14:49:08 DEBUG otopi.context context._executeMethod:142 method exception
> Traceback (most recent call last):
>   File "/usr/lib/python2.7/site-packages/otopi/context.py", line 132, in _executeMethod
>     method['method']()
>   File "/usr/share/ovirt-hosted-engine-setup/scripts/../plugins/gr-he-common/network/bridge.py", line 327, in _get_hostname_from_bridge_if
>     o=other_ip,
> RuntimeError: hostname 'node01.example.comh' doesn't uniquely match the interface 'ens802f1' selected for the management bridge; it matches also interface with IP set(['192.168.99.10']). Please make sure that the hostname got from the interface for the management network resolves only there.
> 2016-07-05 14:49:08 ERROR otopi.context context._executeMethod:151 Failed to execute stage 'Setup validation': hostname 'node01.example.com' doesn't uniquely match the interface 'ens802f1' selected for the management bridge; it matches also interface with IP set(['192.168.99.10']). Please make sure that the hostname got from the interface for the management network resolves only there.
>
> The output for dig:
>
> [root at node01 ~]# dig node01.example.com
>
> ; <<>> DiG 9.9.4-RedHat-9.9.4-29.el7_2.3 <<>> node01.example.com
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45269
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 2
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 4096
> ;; QUESTION SECTION:
> ;node01.example.com.     IN      A
>
> ;; ANSWER SECTION:
> node01.example.com. 3600 IN      A       192.168.10.194
>
> ;; AUTHORITY SECTION:
> example.com       900     IN      NS      dns.example.com.
>
> ;; ADDITIONAL SECTION:
> dns.example.com. 900 IN      A       192.168.10.61
>
> ;; Query time: 3 msec
> ;; SERVER: 192.168.10.61#53(192.168.10.61)
> ;; WHEN: Die Jul 05 15:14:48 CEST 2016
> ;; MSG SIZE  rcvd: 110
>
> Output for nslookup:
>
> [root at node01 ~]# nslookup 192.168.99.10
> Server:         192.168.10.61
> Address:        192.168.10.61#53
>
> ** server can't find 10.99.168.192.in-addr.arpa.: NXDOMAIN
>
> Why does the setup script think that my hostname resolves to 192.168.99.10?

Please run above python command and see for yourself.

Perhaps you have other means it uses for name resolution.

Check /etc/nsswitch.conf, getent, mdns, /etc/hosts, etc.

Best,
-- 
Didi