|
|
@@ -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 <sam@hocevar.net> |
|
|
### |
|
|
### 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. |
mpasternacki revised this gist