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# core-image-watcher
# Copyright (C) 2015 Canonical
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
"""Constants for this service."""
API_VERSION = "v1"
SOLUTION_NAME = "core-image-testing"
SERVICE_NAME = "core-image-watcher"
def _get_hostname():
"""Return sanitized contents of /etc/hostname.
It is necessary because current juju hostnames (juju-<env-name>-machine-#)
are too big due to our long environment names ('<spec_name>-<MD5>').
Linux (DNS for RFC1035, really) only supports labels up to 64 chars and
the fallback varies from tool to tool, `cloud-init` chokes on longer
names and sets 'ubuntu', `hostnamectl` (systemd) would truncate the
given data.
None of this is ideal to our applications, that's why we will operate
on the pristine /etc/hostname and remove the 'juju-' and '-machine' terms
added by juju.
"""
with open('/etc/hostname') as fd:
hostname = fd.read()
return hostname.replace('juju-', '').replace('-machine', '').strip()
HOSTNAME = _get_hostname()
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