knife boot strapは成功するが、chef-clientは接続できない

Question

###前提・実現したいこと
Validatorless Bootstrapをためすと、knife bootstrapは成功しますが/etc/chef/validation.pemと/etc/chef/client.rbを生成しないため、chef-clientが接続できません。
/etc/chef以下の適切な設定方法は何でしょうか。。

###発生している問題・エラーメッセージ

[root@localhost vagrant]# knife bootstrap *.*.*.* -N 'chef-test' -r 'role[infra]' --ssh-user root -P xs-123 --sudo
Node chef-test exists, overwrite it? (Y/N) Y
Client chef-test exists, overwrite it? (Y/N) Y
Creating new client for chef-test
Creating new node for chef-test
Connecting to *.*.*.*
*.*.*.* -----> Existing Chef installation detected
*.*.*.* Starting the first Chef Client run...
~中略~
*.*.*.* Running handlers complete
*.*.*.* Chef Client finished, 0/1 resources updated in 05 seconds
[root@localhost vagrant]# chef-client
[2017-07-18T16:05:19+09:00] WARN: *****************************************
[2017-07-18T16:05:19+09:00] WARN: Did not find config file: /etc/chef/client.rb, using command line options.
[2017-07-18T16:05:19+09:00] WARN: *****************************************
Starting Chef Client, version 13.2.20
Creating a new client identity for localhost using the validator key.
[2017-07-18T16:05:20+09:00] WARN: Failed to read the private key /etc/chef/validation.pem: #<Errno::ENOENT: No such file or directory @ rb_sysopen - /etc/chef/validation.pem>
[2017-07-18T16:05:20+09:00] WARN: Failed to read the private key /etc/chef/validation.pem: #<Errno::ENOENT: No such file or directory @ rb_sysopen - /etc/chef/validation.pem>

================================================================================
Chef encountered an error attempting to create the client "localhost"
================================================================================

Private Key Not Found:
----------------------
Your private key could not be loaded. If the key file exists, ensure that it is
readable by chef-client.

Relevant Config Settings:
-------------------------
validation_key "/etc/chef/validation.pem"

System Info:
------------
chef_version=13.2.20
ruby=ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-linux]
program_name=chef-client worker: ppid=2629;start=16:05:19;
executable=/opt/chef/bin/chef-client


Running handlers:
～以下略～
[root@localhost vagrant]# cat /var/chef/cache/chef-stacktrace.out
Generated at 2017-07-18 16:05:20 +0900
Chef::Exceptions::PrivateKeyMissing: I cannot read /etc/chef/validation.pem, which you told me to use to sign requests!
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http/authenticator.rb:95:in `rescue in load_signing_key'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http/authenticator.rb:85:in `load_signing_key'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http/authenticator.rb:42:in `initialize'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http.rb:98:in `new'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http.rb:98:in `block in initialize'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http.rb:97:in `each'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http.rb:97:in `initialize'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/server_api.rb:37:in `initialize'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/api_client/registration.rb:150:in `new'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/api_client/registration.rb:150:in `http_api'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/api_client/registration.rb:96:in `create'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/api_client/registration.rb:87:in `create_or_update'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/api_client/registration.rb:58:in `run'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/client.rb:666:in `register'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/client.rb:267:in `run'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:291:in `block in fork_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:279:in `fork'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:279:in `fork_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:244:in `block in run_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/local_mode.rb:44:in `with_server_connectivity'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:232:in `run_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application/client.rb:469:in `sleep_then_run_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application/client.rb:458:in `block in interval_run_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application/client.rb:457:in `loop'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application/client.rb:457:in `interval_run_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application/client.rb:441:in `run_application'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:59:in `run'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/bin/chef-client:26:in `<top (required)>'
/usr/bin/chef-client:58:in `load'
/usr/bin/chef-client:58:in `<main>'

>>>> Caused by Errno::ENOENT: No such file or directory @ rb_sysopen - /etc/chef/validation.pem
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http/authenticator.rb:86:in `read'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http/authenticator.rb:86:in `load_signing_key'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http/authenticator.rb:42:in `initialize'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http.rb:98:in `new'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http.rb:98:in `block in initialize'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http.rb:97:in `each'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/http.rb:97:in `initialize'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/server_api.rb:37:in `initialize'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/api_client/registration.rb:150:in `new'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/api_client/registration.rb:150:in `http_api'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/api_client/registration.rb:96:in `create'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/api_client/registration.rb:87:in `create_or_update'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/api_client/registration.rb:58:in `run'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/client.rb:666:in `register'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/client.rb:267:in `run'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:291:in `block in fork_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:279:in `fork'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:279:in `fork_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:244:in `block in run_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/local_mode.rb:44:in `with_server_connectivity'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:232:in `run_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application/client.rb:469:in `sleep_then_run_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application/client.rb:458:in `block in interval_run_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application/client.rb:457:in `loop'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application/client.rb:457:in `interval_run_chef_client'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application/client.rb:441:in `run_application'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/lib/chef/application.rb:59:in `run'
/opt/chef/embedded/lib/ruby/gems/2.4.0/gems/chef-13.2.20/bin/chef-client:26:in `<top (required)>'
/usr/bin/chef-client:58:in `load'
/usr/bin/chef-client:58:in `<main>'[root@localhost vagrant]#

###試したこと
chef-serverの旧バージョンで発生したため、chef-serverを最新版にしました。
knife ssl checkなどは問題ありません。

###補足情報(言語/FW/ツール等のバージョンなど)
CentOS 7環境で、

• chef client

chef-13.2.20-1.el7.x86_64.rpm

• chef server

chef-server-core-12.15.8-1.el7.x86_64.rpm

yumでlocalinstallしました。

Answer 1

chef-serverからclient.pemファイルをダウンロードし、kitchenのknife.rbを改変してclient.rbを作成しました。
とりあえず接続はできてしまったのですが、server faultかどっかでknife bootstrapはno longer maintenanceとか言われてたので皆様のお知恵をお借りしたかった次第です。

というわけで自己解決してしまったので、クローズです。