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#
# Author:: Adam Jacob (<adam@chef.io>)
# Author:: Benjamin Black (<nostromo@gmail.com>)
# Author:: Bryan McLellan (<btm@loftninjas.org>)
# Author:: Daniel DeLeo (<dan@kallistec.com>)
# Author:: Doug MacEachern (<dougm@vmware.com>)
# Author:: James Gartrell (<jgartrel@gmail.com>)
# Author:: Isa Farnik (<isa@chef.io>)
# Copyright:: Copyright (c) 2008-2018, Chef Software Inc.
# Copyright:: Copyright (c) 2009 Bryan McLellan
# Copyright:: Copyright (c) 2009 Daniel DeLeo
# Copyright:: Copyright (c) 2010 VMware, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
Ohai.plugin(:Hostname) do
require "socket"
require "ipaddr"
provides "domain", "hostname", "fqdn", "machinename"
# hostname : short hostname
# machinename : output of hostname command (might be short on solaris)
# fqdn : result of canonicalizing hostname using DNS or /etc/hosts
# domain : domain part of FQDN
#
# hostname and machinename should always exist
# fqdn and domain may be broken if DNS is broken on the host
def from_cmd(cmd)
so = shell_out(cmd)
so.stdout.split($/)[0]
end
# forward and reverse lookup to canonicalize FQDN (hostname -f equivalent)
# this is ipv6-safe, works on ruby 1.8.7+
def resolve_fqdn
hostname = from_cmd("hostname")
addrinfo = Socket.getaddrinfo(hostname, nil).first
iaddr = IPAddr.new(addrinfo[3])
Socket.gethostbyaddr(iaddr.hton)[0]
rescue
nil
end
def collect_domain
# Domain is everything after the first dot
if fqdn
fqdn =~ /.+?\.(.*)/
domain $1
end
end
def collect_hostname
# Hostname is everything before the first dot
if machinename
machinename =~ /([^.]+)\.?/
hostname $1
elsif fqdn
fqdn =~ /(.+?)\./
hostname $1
end
end
collect_data(:hpux, :default) do
machinename from_cmd("hostname")
fqdn resolve_fqdn
collect_hostname
collect_domain
end
collect_data(:aix) do
machinename from_cmd("hostname -s")
fqdn resolve_fqdn || from_cmd("hostname")
collect_hostname
collect_domain
end
collect_data(:netbsd, :openbsd, :dragonflybsd) do
hostname from_cmd("hostname -s")
fqdn resolve_fqdn
machinename from_cmd("hostname")
collect_domain
end
collect_data(:darwin) do
hostname from_cmd("hostname -s")
machinename from_cmd("hostname")
begin
ourfqdn = resolve_fqdn
# Sometimes... very rarely, but sometimes, 'hostname --fqdn' falsely
# returns a blank string. WTF.
if ourfqdn.nil? || ourfqdn.empty?
logger.trace("Plugin Hostname: hostname returned an empty string, retrying once.")
ourfqdn = resolve_fqdn
end
if ourfqdn.nil? || ourfqdn.empty?
logger.trace("Plugin Hostname: hostname returned an empty string twice and will" +
"not be set.")
else
fqdn ourfqdn
end
rescue
logger.trace(
"Plugin Hostname: hostname returned an error, probably no domain set")
end
domain collect_domain
end
collect_data(:freebsd) do
hostname from_cmd("hostname -s")
machinename from_cmd("hostname")
fqdn from_cmd("hostname -f")
collect_domain
end
collect_data(:linux) do
hostname from_cmd("hostname -s")
machinename from_cmd("hostname")
begin
ourfqdn = from_cmd("hostname --fqdn")
# Sometimes... very rarely, but sometimes, 'hostname --fqdn' falsely
# returns a blank string. WTF.
if ourfqdn.nil? || ourfqdn.empty?
logger.trace("Plugin Hostname: hostname --fqdn returned an empty string, retrying " +
"once.")
ourfqdn = from_cmd("hostname --fqdn")
end
if ourfqdn.nil? || ourfqdn.empty?
logger.trace("Plugin Hostname: hostname --fqdn returned an empty string twice and " +
"will not be set.")
else
fqdn ourfqdn
end
rescue
logger.trace("Plugin Hostname: hostname --fqdn returned an error, probably no domain set")
end
domain collect_domain
end
collect_data(:solaris2) do
machinename from_cmd("hostname")
hostname from_cmd("hostname")
fqdn resolve_fqdn
domain collect_domain
end
collect_data(:windows) do
require "wmi-lite/wmi"
require "socket"
wmi = WmiLite::Wmi.new
host = wmi.first_of("Win32_ComputerSystem")
hostname host["dnshostname"].to_s
machinename host["name"].to_s
info = Socket.gethostbyname(Socket.gethostname)
if info.first =~ /.+?\.(.*)/
fqdn info.first
else
# host is not in dns. optionally use:
# C:\WINDOWS\system32\drivers\etc\hosts
info[3..info.length].reverse.each do |addr|
hostent = Socket.gethostbyaddr(addr)
if hostent.first =~ /.+?\.(.*)/
fqdn hostent.first
break
end
end
fqdn info.first unless fqdn
end
domain collect_domain
end
end
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