[neutron] Different 'hostname' output on Ubuntu and CentOS

[Andrey Sledzinskiy]

{

    "build_id": "2014-11-19_11-01-11",
    "ostf_sha": "85272980659a977582e5b2dc67479fe9d7c1bbe7",
    "build_number": "115",
    "auth_required": true,
    "api": "1.0",
    "nailgun_sha": "ffb507b8222f1529bca113489413ed536d2b517b",
    "production": "docker",
    "fuelmain_sha": "fc2c7b9deb0dad12482410d4750b264c57450c0c",
    "astute_sha": "65eb911c38afc0e23d187772f9a05f703c685896",
    "feature_groups": [
        "mirantis"
    ],
    "release": "6.0",
    "release_versions": {
        "2014.2-6.0": {
            "VERSION": {
                "build_id": "2014-11-19_11-01-11",
                "ostf_sha": "85272980659a977582e5b2dc67479fe9d7c1bbe7",
                "build_number": "115",
                "api": "1.0",
                "nailgun_sha": "ffb507b8222f1529bca113489413ed536d2b517b",
                "production": "docker",
                "fuelmain_sha": "fc2c7b9deb0dad12482410d4750b264c57450c0c",
                "astute_sha": "65eb911c38afc0e23d187772f9a05f703c685896",
                "feature_groups": [
                    "mirantis"
                ],
                "release": "6.0",
                "fuellib_sha": "74f7d1923d0b450be69850a82f3be8b17fc707c9"
            }
        }
    },
    "fuellib_sha": "74f7d1923d0b450be69850a82f3be8b17fc707c9"

}

On CentOS 'hostname' returns output like - node-6.test.domain.local
On Ubuntu it's like - node-6

Can we have the same output on Ubuntu and CentOS ?
It affects our system tests because we get hostname in different formats on Ubuntu and CentOS and we have to work-around it in tests

[Matthew Mosesohn (raytrac3r)]

Use uname -n. It's what "facter" uses to identify hosts. It will return node-6.test.domain.local.

[Matthew Mosesohn (raytrac3r)]

And if you need to use Python to get this data, you can do this:
short_hostname, separator, domain = os.uname()[1].partition('.')
long_hostname = os.uname()[1]

[Andrey Sledzinskiy (asledzinskiy)]

The problem isn't that I don't know how to get full hostname in tests, the problem is that different openstack clients that we use return different hostname format on Ubuntu and CentOS. And it happens I think because of hostname different output.
For example, hostname output of 'neutron dhcp-agent-list-hosting-net' differs on Ubuntu and CentOS but I want it to be the same

[Matthew Mosesohn (raytrac3r)]

Let's pass to neutron team to investigate how neutron identifies hostnames.

[Ilya Shakhat (shakhat)]

The issue is in the way Fuel configures hostname and not related to Neutron. Clearing the tag and reassigning to fuel-library

[Matthew Mosesohn (raytrac3r)]

It looks like neutron uses socket.gethostname()
https://github.com/openstack/neutron/blob/master/neutron/common/utils.py#L219

[Matthew Mosesohn (raytrac3r)]

Upstream bug: https://bugs.launchpad.net/nova/+bug/1055503

[Bogdan Dobrelya (bogdando)]

Pacemaker rely on crm_node -n, let's fix it in upstream and contribute to Fuel

[Matthew Mosesohn (raytrac3r)]

This is actually being set in oslo.utils. We can see if this old bug can be resurrected by them.

[Dennis Dmitriev (ddmitriev)]

The same issue on Ubuntu in Fuel 5.1.1

[Dmitry Mescheryakov (dmitrymex)]

The issue importance is less than high, hence we are not going to fix it in a maintenance release

[Viktor Serhieiev (vsergeyev)]

Folks, could you please explain more detailed - how this bug affects oslo.utils? It doesn't seem to be, that projects get hostname from there.

[Vladimir Kuklin (vkuklin)]

This is as-designed for all Linux distributions. Debian and CentOS always return different hostname command.

Use hostname -f or hostname -s for particular short or full names.

Moreover there is no CentOS in 7.0 - this bug is Invalid