mirror of
https://github.com/ceph/ceph
synced 2024-12-26 21:43:10 +00:00
103 lines
3.6 KiB
Python
103 lines
3.6 KiB
Python
"""
|
|
Task for dnsmasq configuration
|
|
"""
|
|
import contextlib
|
|
import logging
|
|
|
|
from teuthology import misc
|
|
from teuthology.exceptions import ConfigError
|
|
from teuthology import contextutil
|
|
from util import get_remote_for_role
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
@contextlib.contextmanager
|
|
def setup_dnsmasq(remote, cnames):
|
|
""" configure dnsmasq on the given remote, adding each cname given """
|
|
log.info('Configuring dnsmasq on remote %s..', remote.name)
|
|
|
|
# back up existing resolv.conf
|
|
resolv_conf = misc.get_file(remote, '/etc/resolv.conf')
|
|
# point resolv.conf to local dnsmasq
|
|
misc.sudo_write_file(remote, '/etc/resolv.conf',
|
|
"nameserver 127.0.0.1\n")
|
|
|
|
# add address entries to /etc/dnsmasq.d/ceph
|
|
dnsmasq = "server=8.8.8.8\nserver=8.8.4.4\n"
|
|
address_template = "address=/{cname}/{ip_address}\n"
|
|
for cname, ip_address in cnames.iteritems():
|
|
dnsmasq += address_template.format(cname=cname, ip_address=ip_address)
|
|
misc.sudo_write_file(remote, '/etc/dnsmasq.d/ceph', dnsmasq)
|
|
|
|
remote.run(args=['cat', '/etc/dnsmasq.d/ceph'])
|
|
# restart dnsmasq
|
|
remote.run(args=['sudo', 'systemctl', 'restart', 'dnsmasq'])
|
|
remote.run(args=['sudo', 'systemctl', 'status', 'dnsmasq'])
|
|
# verify dns name is set
|
|
remote.run(args=['ping', '-c', '4', cnames.keys()[0]])
|
|
|
|
yield
|
|
|
|
log.info('Removing dnsmasq configuration from remote %s..', remote.name)
|
|
# restore resolv.conf
|
|
misc.sudo_write_file(remote, '/etc/resolv.conf', resolv_conf)
|
|
# restart dnsmasq
|
|
remote.run(args=['sudo', 'systemctl', 'restart', 'dnsmasq'])
|
|
|
|
@contextlib.contextmanager
|
|
def task(ctx, config):
|
|
"""
|
|
Configures dnsmasq to add cnames for teuthology remotes. The task expects a
|
|
dictionary, where each key is a role. If all cnames for that role use the
|
|
same address as that role, the cnames can be given as a list. For example,
|
|
this entry configures dnsmasq on the remote associated with client.0, adding
|
|
two cnames for the ip address associated with client.0:
|
|
|
|
- dnsmasq:
|
|
client.0:
|
|
- client0.example.com
|
|
- c0.example.com
|
|
|
|
If the addresses do not all match the given role, a dictionary can be given
|
|
to specify the ip address by its target role. For example:
|
|
|
|
- dnsmasq:
|
|
client.0:
|
|
client.0.example.com: client.0
|
|
client.1.example.com: client.1
|
|
"""
|
|
# apply overrides
|
|
overrides = config.get('overrides', {})
|
|
misc.deep_merge(config, overrides.get('dnsmasq', {}))
|
|
|
|
# multiple roles may map to the same remote, so collect names by remote
|
|
remote_names = {}
|
|
for role, cnames in config.iteritems():
|
|
remote = get_remote_for_role(ctx, role)
|
|
if remote is None:
|
|
raise ConfigError('no remote for role %s' % role)
|
|
|
|
names = remote_names.get(remote, {})
|
|
|
|
if isinstance(cnames, list):
|
|
# when given a list of cnames, point to local ip
|
|
for cname in cnames:
|
|
names[cname] = remote.ip_address
|
|
elif isinstance(cnames, dict):
|
|
# when given a dict, look up the remote ip for each
|
|
for cname, client in cnames.iteritems():
|
|
r = get_remote_for_role(ctx, client)
|
|
if r is None:
|
|
raise ConfigError('no remote for role %s' % client)
|
|
names[cname] = r.ip_address
|
|
|
|
remote_names[remote] = names
|
|
|
|
# run a subtask for each unique remote
|
|
subtasks = []
|
|
for remote, cnames in remote_names.iteritems():
|
|
subtasks.extend([ lambda r=remote, cn=cnames: setup_dnsmasq(r, cn) ])
|
|
|
|
with contextutil.nested(*subtasks):
|
|
yield
|