timusg · December 21, 2013 14:55 · Mar 19, 2013 · Mar 19, 2013 · Mar 19, 2013 · Mar 19, 2013
diff --git a/rename-node.rb b/rename-node.rb
@@ -81,6 +81,7 @@
   [ -f attributes.json ] && sudo cat attributes.json
 fi
 sudo chef-client -N #{to_id}
+sudo rm -v /etc/chef/validation.pem
 EOF
     if stream == :stderr
       STDERR.write data

diff --git a/rename-node.rb b/rename-node.rb
@@ -80,7 +80,7 @@
   [ `sudo cat attributes.json` = '{}' ] && sudo rm -v attributes.json
   [ -f attributes.json ] && sudo cat attributes.json
 fi
-sudo chef-client -N #{to_id} -l warn
+sudo chef-client -N #{to_id}
 EOF
     if stream == :stderr
       STDERR.write data

diff --git a/rename-node.rb b/rename-node.rb
@@ -67,7 +67,7 @@
 puts "Logging into node..."
 Net::SSH.start(new_node.fqdn, Chef::Config[:knife][:ssh_user]) do |ssh|
   puts "Uploading validation.pem..."
-  ssh.scp.upload!("~/.chef/validation.pem", "/tmp/validation.pem")
+  ssh.scp.upload!("#{File.expand_path('~')}/.chef/validation.pem", "/tmp/validation.pem")
   puts "Running update script..."
   ssh.exec! <<EOF do |ch, stream, data|
 set -e -x

diff --git a/rename-node.rb b/rename-node.rb
@@ -89,7 +89,7 @@
       STDOUT.write data
       STDOUT.flush
     end
-  end    
+  end
 end
 
 puts "Done!"

diff --git a/rename-node.rb b/rename-node.rb
@@ -65,7 +65,7 @@
 end
 
 puts "Logging into node..."
-Net::SSH.start(new_node.ec2.public_hostname, Chef::Config[:knife][:ssh_user]) do |ssh|
+Net::SSH.start(new_node.fqdn, Chef::Config[:knife][:ssh_user]) do |ssh|
   puts "Uploading validation.pem..."
   ssh.scp.upload!("~/.chef/validation.pem", "/tmp/validation.pem")
   puts "Running update script..."

diff --git a/rename-node.rb b/rename-node.rb
@@ -67,7 +67,7 @@
 puts "Logging into node..."
 Net::SSH.start(new_node.ec2.public_hostname, Chef::Config[:knife][:ssh_user]) do |ssh|
   puts "Uploading validation.pem..."
-  ssh.scp.upload!(".chef/validation.pem", "/tmp/validation.pem")
+  ssh.scp.upload!("~/.chef/validation.pem", "/tmp/validation.pem")
   puts "Running update script..."
   ssh.exec! <<EOF do |ch, stream, data|
 set -e -x

diff --git a/rename-node.rb b/rename-node.rb
@@ -1,4 +1,4 @@
-#!./bin/knife exec
+#!/usr/bin/env knife exec
 
 # A knife exec script to change chef node's name, preserving all the attributes.
 #

diff --git a/rename-node.rb b/rename-node.rb
@@ -50,7 +50,11 @@
 
 puts "Saving modified node..."
 # without :create_id => nil JSON::parse will create an actual instance
-new_node = JSON::parse(JSON::dump(node_data))
+
+# new_node = JSON::parse(JSON::dump(node_data))
+# JSON::parse fails with "NoMethodError: undefined method `save' for #<Hash:0x007fec1c62df30>"
+# Using Chef::JSONCompat.from_json instead
+new_node = Chef::JSONCompat.from_json(JSON::dump(node_data))
 new_node.save
 
 unless ENV['KEEP_IT_SAFE']

diff --git a/rename-node.rb b/rename-node.rb
@@ -92,6 +92,8 @@
 exit 0
 # http://wiki.opscode.com/display/chef/Knife+Exec#KnifeExec-PassingArgumentstoKnifeScripts
 
+### Copyright (C) 2012 Maciej Pasternacki <[email protected]>
+###
 ###            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
 ###                    Version 2, December 2004
 ###

diff --git a/rename-node.rb b/rename-node.rb
@@ -0,0 +1,107 @@
+#!./bin/knife exec
+
+# A knife exec script to change chef node's name, preserving all the attributes.
+#
+# Usage: knife exec rename-node.rb old-name new-name
+#
+# Script retrieves the Node object, changes its 'name' attribute,
+# creates new Node object with updated name and rest of attributes
+# untouched. Then it deletes old Node and Client objects from
+# database, and logs into the server to update it:
+#  - copy validation.pem from the local .chef directory
+#  - remove client.pem
+#  - comment out node_name from client.rb
+#  - delete "name":"[^"]*" entry from attributes.json if file exists
+#  - delete attributes.json if empty
+#  - run chef-client -N new_id to re-register client
+#
+# Script makes a few assumptions that may be different in your setup:
+#  - that you keep validation.pem locally in .chef/
+#  - that you generate client.rb including client_name during chef-client run
+#  - that you may have attributes.json file and it is not pretty-printed (no extra spaces)
+#  - that chef-client will run with or without attributes.json file
+#
+# To sum up, you will probably want to review the script and adapt
+# parts of it to match your setup, especially shell script part near
+# the bottom (here-doc for ssh.exec! invocation).
+#
+# Based on:
+#  - http://tech.superhappykittymeow.com/?p=292
+#  - http://help.opscode.com/discussions/questions/130-rename-a-node
+#  - http://lists.opscode.com/sympa/arc/chef/2011-05/msg00196.html
+
+abort("usage: ./bin/knife exec #{ARGV[1]} from_id to_id") unless ARGV[3]
+
+require 'net/ssh'
+require 'net/scp'
+
+from_id = ARGV[2]
+to_id = ARGV[3]
+
+puts "Loading node #{from_id}..."
+orig_node = Chef::Node.load(from_id)
+node_data = JSON::parse(orig_node.to_json, :create_id => nil)
+
+puts "Changing name attribute to #{to_id}..."
+node_data['name'] = to_id
+node_data.values.
+  select { |v| v.is_a?(Hash) and v['name'] }.
+  each { |v| v['name'] = to_id }
+
+puts "Saving modified node..."
+# without :create_id => nil JSON::parse will create an actual instance
+new_node = JSON::parse(JSON::dump(node_data))
+new_node.save
+
+unless ENV['KEEP_IT_SAFE']
+  puts "Deleting node #{from_id}..."
+  orig_node.destroy
+  puts "Deleting client #{from_id}..."
+  Chef::ApiClient.load(from_id).destroy
+end
+
+puts "Logging into node..."
+Net::SSH.start(new_node.ec2.public_hostname, Chef::Config[:knife][:ssh_user]) do |ssh|
+  puts "Uploading validation.pem..."
+  ssh.scp.upload!(".chef/validation.pem", "/tmp/validation.pem")
+  puts "Running update script..."
+  ssh.exec! <<EOF do |ch, stream, data|
+set -e -x
+cd /etc/chef
+sudo mv -v /tmp/validation.pem .
+sudo rm -v client.pem
+sudo sed -i~rename '/node_name/s/^/# /' client.rb
+if [ -f attributes.json ] ; then
+  sudo sed -i~rename 's/"name":"[^"]*",*//' attributes.json
+  [ `sudo cat attributes.json` = '{}' ] && sudo rm -v attributes.json
+  [ -f attributes.json ] && sudo cat attributes.json
+fi
+sudo chef-client -N #{to_id} -l warn
+EOF
+    if stream == :stderr
+      STDERR.write data
+      STDERR.flush
+    else
+      STDOUT.write data
+      STDOUT.flush
+    end
+  end    
+end
+
+puts "Done!"
+exit 0
+# http://wiki.opscode.com/display/chef/Knife+Exec#KnifeExec-PassingArgumentstoKnifeScripts
+
+###            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+###                    Version 2, December 2004
+###
+### Copyright (C) 2004 Sam Hocevar <[email protected]>
+###
+### Everyone is permitted to copy and distribute verbatim or modified
+### copies of this license document, and changing it is allowed as long
+### as the name is changed.
+###
+###            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+###   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+###
+###  0. You just DO WHAT THE FUCK YOU WANT TO.