Merge pull request #435 from darko-poljak/option-f

Option -f: read additional hosts from file (stdin)
This commit is contained in:
Darko Poljak 2016-05-25 07:26:18 +02:00
commit 890429f210
4 changed files with 69 additions and 12 deletions

View file

@ -26,6 +26,7 @@ import shutil
import sys
import time
import pprint
import itertools
import cdist
@ -53,6 +54,27 @@ class Config(object):
self.local.create_files_dirs()
self.remote.create_files_dirs()
@staticmethod
def hosts(source):
"""Yield hosts from source.
Source can be a sequence or filename (stdin if \'-\').
In case of filename each line represents one host.
"""
if isinstance(source, str):
import fileinput
try:
for host in fileinput.input(files=(source)):
# remove leading and trailing whitespace
yield host.strip()
except (IOError, OSError) as e:
raise cdist.Error("Error reading hosts from \'{}\'".format(
source))
else:
if source:
for host in source:
yield host
@classmethod
def commandline(cls, args):
"""Configure remote system"""
@ -60,6 +82,13 @@ class Config(object):
# FIXME: Refactor relict - remove later
log = logging.getLogger("cdist")
if args.manifest == '-' and args.hostfile == '-':
raise cdist.Error(("Cannot read both, manifest and host file, "
"from stdin"))
# if no host source is specified then read hosts from stdin
if not (args.hostfile or args.host):
args.hostfile = '-'
initial_manifest_tempfile = None
if args.manifest == '-':
@ -79,8 +108,11 @@ class Config(object):
process = {}
failed_hosts = []
time_start = time.time()
for host in args.host:
hostcnt = 0
for host in itertools.chain(cls.hosts(args.host),
cls.hosts(args.hostfile)):
hostcnt += 1
if args.parallel:
log.debug("Creating child process for %s", host)
process[host] = multiprocessing.Process(target=cls.onehost, args=(host, args, True))
@ -101,7 +133,7 @@ class Config(object):
failed_hosts.append(host)
time_end = time.time()
log.info("Total processing time for %s host(s): %s", len(args.host),
log.info("Total processing time for %s host(s): %s", hostcnt,
(time_end - time_start))
if len(failed_hosts) > 0:

View file

@ -1,6 +1,9 @@
Changelog
---------
next:
* Core: Add -f option to read additional hosts from file/stdin (Darko Poljak)
4.0.0: 2016-05-04
* Core: Fix bug with parallel hosts operation when output path is specifed (Darko Poljak)
* Type __package_pip: Add support for running as specified user (useful for pip in venv) (Darko Poljak)
@ -25,7 +28,6 @@ Changelog
* Type __consul: Add new consul versions (Nico Schottelius)
* Type __apt_ppa: Do not install legacy package python-software-properties (Steven Armstrong)
3.1.13: 2015-05-16
* Type __block: Fix support for non stdin blocks (Dominique Roux)
* Type __consul: Install package unzip (Nico Schottelius)

View file

@ -14,7 +14,7 @@ cdist [-h] [-d] [-v] [-V] {banner,config,shell} ...
cdist banner [-h] [-d] [-v]
cdist config [-h] [-d] [-V] [-c CONF_DIR] [-i MANIFEST] [-p] [-s] host [host ...]
cdist config [-h] [-d] [-V] [-c CONF_DIR] [-f HOSTFILE] [-i MANIFEST] [-p] [-s] [host [host ...]]
cdist shell [-h] [-d] [-v] [-s SHELL]
@ -63,6 +63,12 @@ Configure one or more hosts
--conf-dir argument have higher precedence over those set through the
environment variable.
-f HOSTFILE, --file HOSTFILE::
Read additional hosts to operate on from specified file
or from stdin if '-' (each host on separate line).
If no host or host file is specified then, by default,
read hosts from stdin.
-i MANIFEST, --initial-manifest MANIFEST::
Path to a cdist manifest or - to read from stdin
@ -105,6 +111,9 @@ EXAMPLES
--remote-copy /path/to/my/remote/copy \
-p ikq02.ethz.ch ikq03.ethz.ch ikq04.ethz.ch
# Configure hosts read from file loadbalancers
% cdist config -f loadbalancers
# Display banner
cdist banner

View file

@ -67,12 +67,14 @@ def commandline():
action='store_true', default=False)
# Main subcommand parser
parser['main'] = argparse.ArgumentParser(description='cdist ' + cdist.VERSION,
parser['main'] = argparse.ArgumentParser(description='cdist '
+ cdist.VERSION,
parents=[parser['loglevel']])
parser['main'].add_argument('-V', '--version',
help='Show version', action='version',
version='%(prog)s ' + cdist.VERSION)
parser['sub'] = parser['main'].add_subparsers(title="Commands")
parser['sub'] = parser['main'].add_subparsers(title="Commands",
dest="command")
# Banner
parser['banner'] = parser['sub'].add_parser('banner',
@ -82,11 +84,17 @@ def commandline():
# Config
parser['config'] = parser['sub'].add_parser('config',
parents=[parser['loglevel']])
parser['config'].add_argument('host', nargs='+',
help='one or more hosts to operate on')
parser['config'].add_argument('host', nargs='*',
help='host(s) to operate on')
parser['config'].add_argument('-c', '--conf-dir',
help='Add configuration directory (can be repeated, last one wins)',
action='append')
help=('Add configuration directory (can be repeated, '
'last one wins)'), action='append')
parser['config'].add_argument('-f', '--file',
help=('Read additional hosts to operate on from specified file '
'or from stdin if \'-\' (each host on separate line). '
'If no host or host file is specified then, by default, '
'read hosts from stdin.'),
dest='hostfile', required=False)
parser['config'].add_argument('-i', '--initial-manifest',
help='Path to a cdist manifest or \'-\' to read from stdin.',
dest='manifest', required=False)
@ -108,7 +116,8 @@ def commandline():
action='store', dest='remote_copy',
default=os.environ.get('CDIST_REMOTE_COPY'))
parser['config'].add_argument('--remote-exec',
help='Command to use for remote execution (should behave like ssh)',
help=('Command to use for remote execution '
'(should behave like ssh)'),
action='store', dest='remote_exec',
default=os.environ.get('CDIST_REMOTE_EXEC'))
parser['config'].set_defaults(func=cdist.config.Config.commandline)
@ -147,6 +156,11 @@ def commandline():
if args_dict['remote_copy'] is None:
args.remote_copy = cdist.REMOTE_COPY + mux_opts
if args.command == 'config':
if args.manifest == '-' and args.hostfile == '-':
print('cdist config: error: cannot read both, manifest and host file, from stdin')
sys.exit(1)
log.debug(args)
log.info("version %s" % cdist.VERSION)