SmartState analysis scheme, restrictions, extensions

16:50 1 Comments

Scheme of Smart State Analysis
The intent of Smart State Analysis is to collect information from Virtual machine and save it in models.
These Models are:
 - Nerwork
 - OperatingSystem
 - Account
 - SystemService
 - GuestApplication
 - Patch
Smart State Analysis system generates a few xml-files with information from VM. Then data is saved using the function add_elements.
And these xml-files are saved in /var/www/miq/vmdb/data/metadata/*.( Also, these xml-files are stored one day and if VM is scanned several times per day, file will be replaced).

It is necessary to say about modules,which collects information and group into following categories.
There are five categories:
 - system
 - services
 - accounts
 - software
 - ntevents
 - vmconfig

Used module depends on OS:

Collection category Source module (Windows) Source module (Linux)
systemMiqWin32::SystemMiqLinux::System
services MiqWin32::Services MiqLinux::InitProcs
accounts MiqWin32::Accounts MiqLinux::Users
software MiqWin32::Software MiqLinux::Packages
ntevents Win32EventLog -
vmconfig MIQExtract MIQExtract

Some restrictions of Smart State Analysis

After exploring Smart State Analysis, restrictions were found, and these restrictions are not documented. More about them:
  1. System of Smart State Analysis supports scanning of files with network configuration in OS: Redhat, Ubuntu and Fedora and emulator Herkules.
  2. System of Smart State Analysis checks only network interface(ifcfg-eth0).
  3. If in configuration file parameters are with '',  System of Smart State Analysis won't parse it correctly.
Our extensions to these restrictions of Smart State Analysis

 The solution of required tasks is creation of extensions of standart functions. Look at new custom functions, which are based on function networking_redhat:
 - networking_custom
 - dhcp_configuration

  
---
SUSEIFCFGFILE = "/etc/sysconfig/network/"
SUSEDHCLIENTFILE = "/var/lib/dhcpcd/"
REDHATIFCFGFILE = "/etc/sysconfig/network-scripts/"
REDHATDHCLIENTFILE = "/var/lib/dhclient/"

def self.dhcp_configuration(ifcfg, attrs, fs)
  dhcpcfg = "dhcpcd-eth" + ifcfg.delete("ifcfgeth-") +".info"
  self.read_file(fs,File.join(SUSEDHCLIENTFILE, dhcpcfg)) do |line|
    case line
      when  /^\s*IPADDR\s*=\s*(.*)$/        then attrs[:ipaddress] = $1
      when  /^\s*NETMASK\s*=\s*(.*)$/       then attrs[:subnet_mask] = $1
      when  /^\s*BROADCAST\s*=\s*(.*)$/     then attrs[:broadcast] = $1
      when  /^\s*NETWORK\s*=\s*(.*)$/       then attrs[:network] = $1
      when  /^\s*GATEWAYS\s*=\s*(.*)$/       then attrs[:default_gateway] = $1
      when  /^\s*DNSDOMAIN\s*=\s*(.*)$/       then attrs[:domain] = $1
      when  /^\s*DNSSERVERS\s*=\s*(.*)$/       then attrs[:dns_server] = $1
      when  /^\s*DHCPSIADDR\s*=\s*(.*)$/       then attrs[:dhcp_server] = $1
    end
  end
  if (attrs.has_key?(:dhcp_server)==false)
    self.read_file(fs,File.join(REDHATDHCLIENTFILE, "dhclient.leases")) do |line|
      case line
        when /^\s*fixed-address\s*(.*)\;$/                 then attrs[:ipaddress] = $1
        when /^\s*option subnet-mask\s*(.*)\;$/            then attrs[:subnet_mask] = $1
        when /^\s*option routers\s*(.*)\;$/                then attrs[:default_gateway] = $1
        when /^\s*option domain-name-servers\s*(.*)\;$/    then attrs[:dns_server] = $1
        when /^\s*option dhcp-server-identifier\s*(.*)\;$/ then attrs[:dhcp_server] = $1
        when /^\s*option domain-name\s*"*(.*)"\;$/         then attrs[:domain] = $1
        when /^\s*expire\s*[0-9]?\s*(.*)\;$/               then attrs[:lease_expires] = $1
        when /^\s*renew\s*[0-9]?\s*(.*)\;$/                then attrs[:lease_obtained] = $1
      end
    end
  end

  attrs
end


def self.networking_custom(fs,attrs,os)
  ifcfg = "ifcfg-eth"
  if (os.eql?("suse"))
    ifcfgfile = SUSEIFCFGFILE
  elsif (os.eql?("redhat") || os.eql?("fedora"))
    ifcfgfile = REDHATIFCFGFILE
  end
  for i in 0..20
    ifcfg_i = ifcfg + i.to_s
    self.read_file(fs,File.join(ifcfgfile, ifcfg_i)) do |line|
      case line
        when  /^\s*BOOTPROTO='?dhcp'?\s*(.*)$/    then attrs[:dhcp_enabled] = 1
        when  /^\s*BOOTPROTO='?static'?\s*(.*)$/  then attrs[:dhcp_enabled] = 0
        when  /^\s*DEVICE\s*=\s*(.*)$/        then attrs[:device] = $1
        when  /^\s*HWADDR\s*=\s*(.*)$/        then attrs[:hwaddr] = $1
        when  /^\s*IPADDR\s*=\s*(.*)$/        then attrs[:ipaddress] = $1
        when  /^\s*NETMASK\s*=\s*(.*)$/       then attrs[:subnet_mask] = $1
        when  /^\s*BROADCAST\s*=\s*(.*)$/     then attrs[:broadcast] = $1
        when  /^\s*NETWORK\s*=\s*(.*)$/       then attrs[:network] = $1
      end
    end
    if (attrs.has_key?(:dhcp_enabled)==true) then
      break
    end
  end
  if (attrs[:dhcp_enabled] == 1)
    attrs = self.dhcp_configuration(ifcfg, attrs,fs)
  end
  self.fix_attr_values(attrs)
  attrs
end

- Function self.networking_custom finds first network interface with BOOTPROTO value (first configured interface)
- If BOOTPROTO=dhcp, then discover DHCP configuration with dhcp_configuration function, currently dhcpd and dhclient supported.
 

1 comments:

Subscribe to: Comments (Atom)