From f682482396bcbdded7a3a342c68d792dd4bd791f Mon Sep 17 00:00:00 2001 From: Richard Ipsum Date: Sat, 14 Mar 2015 17:31:12 +0000 Subject: Add hosts.configure This adds a new config extension to allow deployments to write to /etc/hosts by adding HOSTS_x: to a cluster morph in a similar manner to the fstab.configure extension. --- morphlib/exts/hosts.configure | 48 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100755 morphlib/exts/hosts.configure diff --git a/morphlib/exts/hosts.configure b/morphlib/exts/hosts.configure new file mode 100755 index 00000000..6b068d04 --- /dev/null +++ b/morphlib/exts/hosts.configure @@ -0,0 +1,48 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- +# Copyright © 2015 Codethink Limited +# +# 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; version 2 of the License. +# +# 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, write to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. +# +# =*= License: GPL-2 =*= + + +import os +import sys +import socket + +import morphlib + +def validate(var, line): + xs = line.split() + if len(xs) == 0: + raise morphlib.Error("`%s: %s': line is empty" % (var, line)) + + ip = xs[0] + hostnames = xs[1:] + + if len(hostnames) == 0: + raise morphlib.Error("`%s: %s': missing hostname" % (var, line)) + + family = socket.AF_INET6 if ':' in ip else socket.AF_INET + + try: + socket.inet_pton(family, ip) + except socket.error: + raise morphlib.Error("`%s: %s' invalid ip" % (var, ip)) + +envvars = {k: v for (k, v) in os.environ.iteritems() if k.startswith('HOSTS_')} + +conf_file = os.path.join(sys.argv[1], 'etc/hosts') +morphlib.util.write_from_dict(conf_file, envvars, validate) -- cgit v1.2.1