chef roles

name "webserver"
description "Simple Web App"
run_list (
  "recipe[apache2]"
)

name 'webserver'

description "The base role for systems that server HTTP traffic"

run_list "recipe[apache2]", "recipe[apache2::mode_ssl]", "role[monitor]"

env_run_lists "prod" => ["recipe[apache2]"], "staging" => ["recipe[apache2::staging]"], "_default" => []

default_attributes "apache2" => {"listen_ports" => ["80","443"]}

override_attributes "apache2" => {"listen_ports" => ["80","443"]}

{
  "name": "webserver",
  "chef_type": "role",
  "json_class": "Chef::Role",
  "default_attributes": {
    "apache2": {
      "listen_ports": [ 
        "80",
        "443"
      ]
    }
  },
  "description": "The base role for systems that serve HTTP traffic",
  "run_list": [
    "recipe[apache2]",
    "recipe[apache2::mod_ssl]",
    "role[montior]"
  ],
  "env_run_lists" : {
    "_default" : [],
    "production" : [],
    "preprod" : [],
    "dev": [
      "role[base]",
      "recipe[apache]",
      "recipe[apache::copy_dev_configs]",
    ],
    "test": [
      "role[base]",
      "recipe[apache]"
    ]
   },
  "override_attributes": {
    "apache2": {
      "max_children": "50"
    }
  }
}

knife node run_list add NODE "role[ROLE NAME]"

knife node run_list add NODE "role[ROLE NAME 1],role[ROLE NAME 2],role[ROLE NAME 3]"

export EDITOR=vi

knife role create footbar

{
    "name": "foobar",
    "default_attributes": {
    },
    "json_class": "Chef::Role",
    "run_list": [
 
    ],
    "description": "",
    "chef_type": "role",
    "override_attributes": {
    }
}

knife role edit foobar

knife role show foobar

knife role delete foobar

knife role from file FILE

# knife cookbook create mysql

# cat mysql/templates/default/my.cnf.erb  
# This file is created by chef server
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
port=3306
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
#log-bin=mysql-bin
#server-id=1

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

# mysql package를 install 한다.
package "mysql" do
        action :install
end

# mysql-server package를 install
package "mysql-server" do
        action :install
end

# 만약 template 내용이 변경되면, mysqld service를 restart 한다. 
template "/etc/my.cnf" do
        notifies :restart, "service[mysqld]"
end

# my.cnf 파일 생성
template "/etc/my.cnf" do
        owner "root"
        group "root"
        mode "0644"
        source "my.cnf.erb"
end

# mysqld 서비스 등록
service "mysqld" do
        supports :restart => true, :start => true
        action :start
end

# 설치 완료 후 root 패스워드를 만든다. 
execute "mysqladmin" do
        command "mysqladmin -u root password 12345678"
        action :run
end

# knife cookbook create apache 

package "httpd" do
        action :install
end

directory "/etc/httpd/conf" do
        owner "root"
        group "root"
        mode "0744"
        action :create
end

template "/etc/httpd/conf/httpd.conf" do
        owner "root"
        group "root"
        mode "0644"
        source "httpd.conf.erb"
end

service "httpd" do
        supports :restart => true, :start => true
        action :start
end

# export EDITOR=vim

# knife role create webserver

{
  "default_attributes": {
  },
  "override_attributes": {
  },
  "json_class": "Chef::Role",
  "chef_type": "role",
  "run_list": [
    "recipe[apache]",
    "recipe[mysql]"
  ],
  "env_run_lists": {
  },
  "description": "",
  "name": "webserver"

# knife node run list add web01.yundream.com 'role[webserver]'

# knife role show webserver
chef_type:            role
default_attributes:   
description:          
env_run_lists:        
json_class:           Chef::Role
name:                 webserver
override_attributes:  
run_list:             recipe[apache], recipe[mysql]

# knife node show web01.yundream.com
Node Name:   web01.yundream.com
Environment: _default
FQDN:        web01.yundream.com
IP:          192.168.56.111
Run List:    role[webserver]
Roles:       webserver
Recipes:     apache, mysql
Platform:    centos 6.2