Class: VMC::KNIFE::VCAPUpdateEtcHosts

Inherits:
Object
  • Object
show all
Defined in:
lib/vmc_knife/vmc_knife.rb

Overview

This is really a server-side feature. Replace the 127.0.0.1 localhost #old_uri with the new uri

Instance Method Summary collapse

Constructor Details

#initialize(uri, etc_hosts_path = nil, man = nil) ⇒ VCAPUpdateEtcHosts

uri the uris (hostname) to set. accepted type for uri: space separated list; array of strings; port appended to the hostname are also tolerated and will be stripped out.



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# File 'lib/vmc_knife/vmc_knife.rb', line 1292

def initialize(uri, etc_hosts_path=nil,man=nil)
  @config = etc_hosts_path
  @config ||="/etc/hosts"
  if uri
    if uri.kind_of? String
      uris_arr = uri.split(' ')
      set_all_uris(uris_arr)
    elsif uri.kind_of? Array
      set_all_uris(uri)
    end
  end
  raise "The config file #{@config} does not exist." unless File.exists? @config
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/vmc_knife/vmc_knife.rb', line 1329

def execute()
  return unless update_pending
  @changed = false
  # look for the line that starts with external_uri:
  # replace it with the new uri if indeed there was a change.
  if true
    # use sudo.
    puts "Executing sudo sed -i 's/^127\.0\.0\.1[[:space:]]*localhost.*$/127.0.0.1    localhost #{@uri}/g' #{@config}"
    `sudo sed -i 's/^127\.0\.0\.1[[:space:]]*localhost.*$/127.0.0.1    localhost #{@uri}/g' #{@config}`
  else
    lines = IO.readlines @config
    File.open(@config, "w") do |file|
      lines.each do |s|
        if /^127.0.0.1[\s]+localhost[\s]*/ =~ s
          @changed = true unless /^127.0.0.1[\s]+localhost[\s]+#{@uri}[\s]*/ =~ s
          file.puts "127.0.0.1\tlocalhost #{@uri}\n"
        else
          file.puts s
        end
      end
    end
  end
  #Edit the /etc/hostname file: (not a necessity so far).
  #`sudo hostname #{@uri}`
end

#set_all_uris(uris_arr) ⇒ Object 



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# File 'lib/vmc_knife/vmc_knife.rb', line 1305

def set_all_uris(uris_arr)
  if @uri
    if @uri.kind_of? String
      uris_arr.push @uri
    elsif @uri.kind_of? Array
      uris_arr = @uri + uris_arr
    end
  end
  #remove the port if there is one.
  uris_arr.collect! do |u| u.split(':')[0] end
  uris_arr.sort!
  uris_arr.uniq!
  # filter out the local uris: we rely on mdns for them.
  #uris_arr.delete_if do |u| u =~ /\.local$/ end
  # for now only filter the local url with a '-'
  uris_arr.delete_if do |u| u =~ /-.*\.local$/ end
  @uri = uris_arr.join(' ')
end

#update_pending ⇒ Object 



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# File 'lib/vmc_knife/vmc_knife.rb', line 1323

def update_pending()
  #could also use:
  found_it=`sed -n '/^127\.0\.0\.1[[:space:]]*localhost[[:space:]]*#{@uri}/p' #{@config}`
  return true unless found_it && found_it.strip.length != 0
  return false
end

#was_changed ⇒ Object

Edit the /etc/hostname file: (not a necessity so far). ‘sudo hostname #@uri`



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# File 'lib/vmc_knife/vmc_knife.rb', line 1354

def was_changed()
  @changed
end