544 lines
19 KiB
Ruby
544 lines
19 KiB
Ruby
require "lib/knife/knife_factory"
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require "lib/executors/expiration_scheduler"
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require "hooks"
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require 'net/ssh'
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module Devops
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module Executor
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class ServerExecutor
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include Hooks
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ERROR_CODES = {
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server_bootstrap_fail: 2,
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server_cannot_update_tags: 3,
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server_bootstrap_private_ip_unset: 4,
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server_not_in_chef_nodes: 5,
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server_bootstrap_unknown_error: 7,
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deploy_unknown_error: 6,
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deploy_failed: 8,
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creating_server_unknown_error: 9,
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creating_server_in_cloud_failed: 10
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}
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# waiting for 5*60 seconds (5 min)
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MAX_SSH_RETRIES_AMOUNT = 60
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#params:
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# out - container for output data
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# deploy_info - hash with deploy data
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define_hook :before_deploy
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define_hook :after_deploy
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define_hook :before_create
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define_hook :after_create
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#params:
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# out - container for output data
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define_hook :before_bootstrap
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define_hook :after_bootstrap
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before_deploy :add_run_list_to_deploy_info
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attr_accessor :server, :deploy_env, :report, :project
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def initialize server, out, options={}
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if server
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@project = Devops::Db.connector.project(server.project)
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@deploy_env = @project.deploy_env(server.deploy_env)
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end
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@server = server
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@out = out
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@out.class.send(:define_method, :flush) { } unless @out.respond_to?(:flush)
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@current_user = options[:current_user]
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end
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def self.error_code(reason)
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ERROR_CODES.fetch(reason)
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end
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def self.reason_from_error_code(integer_code)
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ERROR_CODES.key(integer_code) || :unknown_error
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end
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def self.bootstrap_errors_reasons
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[:server_bootstrap_fail, :server_not_in_chef_nodes, :server_bootstrap_unknown_error]
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end
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def error_code(reason)
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self.class.error_code(reason)
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end
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def create_server_object options
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Devops::Model::Server.new({
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"project" => @project.id,
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"deploy_env" => @deploy_env.identifier,
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"created_by" => options["created_by"],
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"provider" => @deploy_env.provider,
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"provider_account" => @deploy_env.provider_account,
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"private_ip" => options["private_ip"]
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})
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end
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def create_server options
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@server = create_server_object(options)
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@server.set_last_operation(Devops::Model::Server::OperationType::CREATION, options["created_by"])
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provider = @deploy_env.provider_instance
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mongo = ::Devops::Db.connector
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begin
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@out.puts "Using '#{@deploy_env.provider}' account '#{@deploy_env.provider_account}'\n" if @deploy_env.provider_account
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@out.puts "Create server..."
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@out.flush
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@server.run_list = options["run_list"] || []
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@server.chef_node_name = options["name"]
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@server.key = options["key"] || provider.ssh_key
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i = mongo.image(@deploy_env.image)
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@server.remote_user = i.remote_user
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res = {}
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@out << "\nBefore create hooks...\n"
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res[:before] = self.run_hook :before_create
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@out << "Done\n"
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unless provider.create_server(@server, @deploy_env.image, @deploy_env.flavor, @deploy_env.subnets, @deploy_env.groups, @out)
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return error_code(:creating_server_in_cloud_failed)
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end
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mongo.server_insert @server
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@out << "\nAfter create hooks...\n"
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res[:after] = self.run_hook :after_create
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@out << "Done\n"
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@out.flush
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DevopsLogger.logger.info "Server with parameters: #{@server.to_hash.inspect} is running"
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schedule_expiration()
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unless options["without_bootstrap"]
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bootstrap_options = {
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bootstrap_template: i.bootstrap_template
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}
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return two_phase_bootstrap(bootstrap_options)
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else
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return 0
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end
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rescue => e
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@out.puts e.message
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@out.puts e.backtrace.join("\n")
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DevopsLogger.logger.error e.message
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roll_back
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mongo.server_delete @server.id
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error_code(:creating_server_unknown_error)
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end
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end
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# options:
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# :run_list (optional)
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# :bootstrap_template (optional)
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# :chef_environment (optional)
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# :config (optional)
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def bootstrap options
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@out << "\n\nBootstrap...\n"
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@out.flush
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k = Devops::Db.connector.key(@server.key)
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cert_path = k.path
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options[:cert_path] = k.path
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@out << "\nBefore bootstrap hooks...\n"
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res = self.run_hook(:before_bootstrap, @out)
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@out << "Done\n"
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if @server.private_ip.nil?
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@out << "Error: Private IP is null"
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return error_code(:server_bootstrap_private_ip_unset)
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end
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ja = {
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:provider => @server.provider,
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:provider_account => @server.provider_account,
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:devops_host => `hostname`.strip
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}
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ip = @server.private_ip
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unless @server.public_ip.nil?
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ip = @server.public_ip
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@out << "\nPublic IP is present\n"
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end
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address = "#{@server.remote_user}@#{ip}"
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cmd = check_ssh_command(cert_path, address)
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@out << "\nWaiting for SSH..."
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@out << "\nTest command: '#{cmd}'\n"
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@out.flush
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retries_amount = 0
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begin
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sleep(5)
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res = execute_system_command(cmd)
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retries_amount += 1
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if retries_amount >= MAX_SSH_RETRIES_AMOUNT
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@out.puts "Can not connect to #{address}"
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@out.puts res
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@out.flush
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DevopsLogger.logger.error "Can not connect with command '#{cmd}':\n#{res}"
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return error_code(:server_bootstrap_fail)
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end
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raise ArgumentError.new("Can not connect with command '#{cmd}' ") unless last_command_successful?
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rescue ArgumentError => e
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@out.puts "SSH command failed, retry (#{retries_amount}/#{MAX_SSH_RETRIES_AMOUNT})"
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@out.flush
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retry
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end
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provider = @server.provider_instance
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@server.chef_node_name = provider.create_default_chef_node_name(@server) if @server.chef_node_name.nil?
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r = knife_instance.knife_bootstrap(@out, ip, self.bootstrap_options(ja, options))
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if r == 0
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@out << "Chef node name: #{@server.chef_node_name}\n"
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::Devops::Db.connector.server_set_chef_node_name @server
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@out << "Chef node name has been updated\n"
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@out << "After bootstrap hooks...\n"
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res = self.run_hook(:after_bootstrap, @out)
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@out << "Done\n"
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msg = "Server with id '#{@server.id}' is bootstraped"
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@out.puts msg
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@out.flush
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DevopsLogger.logger.info msg
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r
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else
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@out << "Can not bootstrap node '#{@server.id}', error code: #{r}"
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@out.flush
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error_code(:server_bootstrap_fail)
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end
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end
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# options:
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# :cert_path (required)
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# :run_list (optional)
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# :bootstrap_template (optional)
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# :chef_environment (optional)
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# :config (optional)
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def bootstrap_options attributes, options
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bootstrap_options = [
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"-x #{@server.remote_user}",
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"-i #{options[:cert_path]}",
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"--json-attributes '#{attributes.to_json}'"
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]
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bootstrap_options.push "-N #{@server.chef_node_name}" if @server.chef_node_name
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bootstrap_options.push "--sudo" unless @server.remote_user == "root"
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bootstrap_options.push "-t #{options[:bootstrap_template]}" if options[:bootstrap_template]
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bootstrap_options.push "-E #{options[:chef_environment]}" if options[:chef_environment]
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rl = options[:run_list]
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bootstrap_options.push "-r #{rl.join(",")}" unless rl.nil? or rl.empty?
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bootstrap_options.push "-c #{options[:config]}" if options[:config]
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bootstrap_options
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end
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def prepare_two_phase_bootstrap options
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@out << "Prepare bootstrap...\n"
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@out << "Done\n"
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end
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# essentially, it just bootstrap and then deploy
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def two_phase_bootstrap options
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prepare_two_phase_bootstrap(options)
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# bootstrap phase
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begin
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provider = @server.provider_instance
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mongo = ::Devops::Db.connector
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options[:run_list] = provider.run_list
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bootstrap_status = bootstrap(options)
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if bootstrap_status == 0
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if check_server_on_chef_server
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@out << "Server #{@server.chef_node_name} is created"
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else
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@out.puts "Can not find client or node on chef-server"
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roll_back
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@out.flush
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mongo.server_delete @server.id
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return error_code(:server_not_in_chef_nodes)
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end
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else
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# @out << roll_back
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# mongo.server_delete @server.id
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msg = "Failed while bootstraping server with id '#{@server.id}'\n"
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msg << "Bootstraping operation result was #{bootstrap_status}"
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DevopsLogger.logger.error msg
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@out.puts msg
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@out.flush
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return error_code(:server_bootstrap_fail)
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end
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rescue => e
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@out << "\nError: #{e.message}\n"
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@out.flush
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return error_code(:server_bootstrap_unknown_error)
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end
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# deploy phase. Assume that all servers are bootstraped successfully here.
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begin
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run_list = compute_run_list
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@out << "\n\nComputed run list: #{run_list.join(", ")}"
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@out.flush
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knife_instance.set_run_list(@server.chef_node_name, run_list)
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deploy_info = options[:deploy_info] || @project.deploy_info(@deploy_env)
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deploy_status = deploy_server(deploy_info)
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if deploy_status == 0
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0
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else
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msg = "Failed on chef-client with run list, server with id '#{@server.id}'"
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msg << "\nDeploing server operation status was #{deploy_status}"
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DevopsLogger.logger.error msg
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@out << "\n" + msg + "\n"
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error_code(:deploy_failed)
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end
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rescue => e
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@out << "\nError: #{e.message}\n"
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DevopsLogger.logger.error(e.message + "\n" + e.backtrace.join("\n"))
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error_code(:deploy_unknown_error)
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end
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end
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def check_server_on_chef_server
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knife_instance.chef_node_list.include?(@server.chef_node_name) and knife_instance.chef_client_list.include?(@server.chef_node_name)
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end
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# returns a hash with :chef_node, :chef_client and :server keys
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def unbootstrap
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k = Devops::Db.connector.key(@server.key)
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cert_path = k.path
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i = 0
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res = delete_from_chef_server(@server.chef_node_name)
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begin
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new_name = "/etc/chef.backup_#{Time.now.strftime("%d-%m-%Y_%H.%M.%S")}"
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cmd = (@server.remote_user == 'root' ? "" : "sudo ")
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cmd = cmd + "/bin/sh -c 'if [[ -d /etc/chef ]]; then mv /etc/chef #{new_name} && echo ok; else echo not found; fi'"
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DevopsLogger.logger.info("SSH: trying to run command '#{cmd}'")
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Net::SSH.start(@server.private_ip, @server.remote_user, :keys => [cert_path]) do |session|
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session.open_channel do |channel|
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channel.request_pty(:modes => { Net::SSH::Connection::Term::ECHO => 0 }) do |c, success|
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raise "could not request pty" unless success
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channel.exec cmd
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channel.on_data do |c_, data|
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if data == 'not found'
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res[:server] = "Directory '/etc/chef' does not exists"
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elsif data == 'ok'
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res[:server] = "'/etc/chef' renamed to '#{new_name}'"
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else
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DevopsLogger.logger.error "Unexpected error: " + data
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raise(data)
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end
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end
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end
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end
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end
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rescue => e
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DevopsLogger.logger.error "Unbootstrap error: " + e.message
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i += 1
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sleep(1)
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retry unless i == 5
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return {error: e.message}
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end
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res
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end
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def deploy_server_with_tags tags, deploy_info
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return deploy_server(deploy_info) if tags.empty?
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old_tags_str = knife_instance.tags_list(@server.chef_node_name).join(" ")
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new_tags_str = tags.join(" ")
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@out.puts "Temporarily changing tags (#{old_tags_str}) to (#{new_tags_str})"
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unless knife_instance.swap_tags(@server.chef_node_name, old_tags_str, new_tags_str)
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m = "Error: Cannot add tags '#{new_tags_str}' to server '#{@server.chef_node_name}'"
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DevopsLogger.logger.error(m)
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@out.puts m
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return error_code(:server_cannot_update_tags)
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end
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DevopsLogger.logger.info("Set tags for '#{@server.chef_node_name}': #{new_tags_str}")
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begin
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deploy_result = deploy_server deploy_info
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ensure
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@out.puts "Restoring tags"
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knife_instance.swap_tags(@server.chef_node_name, new_tags_str, old_tags_str)
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DevopsLogger.logger.info("Restoring tags for #{@server.chef_node_name}: from #{new_tags_str} back to (#{old_tags_str})")
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end
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deploy_result
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end
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def deploy_server deploy_info
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@out << "\nBefore deploy hooks...\n"
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res = self.run_hook(:before_deploy, @out, deploy_info)
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@out << "Done\n"
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@out << "\nRun chef-client on '#{@server.chef_node_name}'\n"
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cmd = "chef-client --no-color"
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if deploy_info["use_json_file"]
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deploy_info.delete("use_json_file")
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json = nil
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dir = DevopsConfig.config[:project_info_dir]
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file = deploy_info.delete("json_file") || "#{@server.project}_#{@server.deploy_env}_#{Time.new.to_i}"
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path = File.join(dir, file)
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if File.exists?(path)
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json = File.read(path)
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else
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json = JSON.pretty_generate(deploy_info)
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File.open(File.join(dir, file), "w") do |f|
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f.write json
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end
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end
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@out.puts "Deploy Input Parameters:"
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@out.puts json
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@out.flush
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cmd << " -j http://#{DevopsConfig.config[:address]}:#{DevopsConfig.config[:port]}/#{DevopsConfig.config[:url_prefix]}/v2.0/deploy/data/#{file}"
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else
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if @deploy_env.chef_client_options
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cmd << " #{@deploy_env.chef_client_options}"
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else
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cmd << " -r #{deploy_info["run_list"].join(",")}" unless @server.stack.nil?
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end
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end
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ip = if @server.public_ip.nil?
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@server.private_ip
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else
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@out << "Public IP detected\n"
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@server.public_ip
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end
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@out.flush
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k = Devops::Db.connector.key(@server.key)
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lline = knife_instance.ssh_stream(@out, cmd, ip, @server.remote_user, k.path)
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r = /Chef\sClient\sfinished/i
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if lline && lline[r]
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@out << "\nAfter deploy hooks...\n"
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res = self.run_hook(:after_deploy, @out, deploy_info)
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@out << "Done\n"
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@server.set_last_operation(Devops::Model::Server::OperationType::DEPLOY, @current_user)
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Devops::Db.connector.server_update(@server)
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0
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else
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@out << "An error occured during knife command executing"
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1
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end
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end
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def delete_from_chef_server node_name
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{
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:chef_node => knife_instance.chef_node_delete(node_name),
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:chef_client => knife_instance.chef_client_delete(node_name)
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}
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end
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def delete_server
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mongo = ::Devops::Db.connector
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if @server.static?
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if !@server.chef_node_name.nil?
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unbootstrap
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end
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mongo.server_delete @server.id
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puts_and_flush "Static server '#{@server.id}' is removed"
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return 0
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end
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puts_and_flush "Deleting from chef server:"
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delete_from_chef_server(@server.chef_node_name).each do |key, result|
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@out.puts "#{key} - #{result}"
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end
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puts_and_flush "Deleting from cloud:"
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provider = @server.provider_instance
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begin
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puts_and_flush provider.delete_server @server
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rescue Fog::Compute::OpenStack::NotFound, Fog::Compute::AWS::NotFound
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puts_and_flush "Server with id '#{@server.id}' not found among '#{provider.name}' servers"
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end
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mongo.server_delete @server.id
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puts_and_flush "Server '#{@server.id}' with name '#{@server.chef_node_name}' for project '#{@server.project}-#{@server.deploy_env}' is removed."
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0
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end
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def roll_back
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@out.puts "Trying to roll back..."
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unless @server.id.nil?
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@out.puts "Server '#{@server.chef_node_name}' with id '#{@server.id}' is not created"
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@out.puts delete_from_chef_server(@server.chef_node_name).values.join("\n")
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begin
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@out.puts @server.provider_instance.delete_server(@server)
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rescue => e
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@out.puts e.message
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end
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@out << "\nRolled back\n"
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end
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end
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def add_run_list_to_deploy_info out, deploy_info
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out << "\nGenerate run list hook...\n"
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if deploy_info["run_list"]
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out << "Deploy info already contains 'run_list': #{deploy_info["run_list"].join(", ")}\n"
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return
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end
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out << "Project run list: #{@project.run_list.join(", ")}\n"
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out << "Deploy environment run list: #{@deploy_env.run_list.join(", ")}\n"
|
|
out << "Server run list: #{@server.run_list.join(", ")}\n"
|
|
deploy_info["run_list"] = compute_run_list
|
|
out << "New deploy run list: #{deploy_info["run_list"].join(", ")}\nRun list has been generated\n\n"
|
|
end
|
|
|
|
def compute_run_list
|
|
rlist = []
|
|
[@deploy_env.provider_instance.run_list, @project.run_list, @deploy_env.run_list, @server.run_list].each do |sub_run_list|
|
|
rlist += sub_run_list if sub_run_list
|
|
end
|
|
if @server.stack
|
|
stack = Devops::Db.connector.stack(@server.stack)
|
|
srl = stack.run_list
|
|
rlist += srl if srl
|
|
end
|
|
rlist.uniq
|
|
end
|
|
|
|
private
|
|
|
|
def puts_and_flush(message)
|
|
@out.puts message
|
|
@out.flush
|
|
end
|
|
|
|
def schedule_expiration
|
|
if @deploy_env.expires
|
|
@out << "Planning expiration in #{@deploy_env.expires}"
|
|
ExpirationScheduler.new(@deploy_env.expires, @server).schedule_expiration!
|
|
end
|
|
end
|
|
|
|
def check_ssh_command(cert_path, address)
|
|
cmd = 'ssh '
|
|
cmd << "-i #{cert_path} "
|
|
cmd << '-q '
|
|
cmd << '-o StrictHostKeyChecking=no '
|
|
cmd << '-o ConnectTimeout=2 -o ConnectionAttempts=1 '
|
|
cmd << "#{address} 'exit'"
|
|
cmd << " 2>&1"
|
|
cmd
|
|
end
|
|
|
|
def execute_system_command(cmd)
|
|
`#{cmd}`
|
|
end
|
|
|
|
def last_command_successful?
|
|
$?.success?
|
|
end
|
|
|
|
def knife_instance
|
|
@knife_instance ||= KnifeFactory.instance
|
|
end
|
|
|
|
end
|
|
end
|
|
end
|