1 | NAGIOS MONITORING |
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2 | ----------------- |
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3 | |
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4 | On Master server |
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5 | |
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6 | 1. Go to Nagios working directory |
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7 | |
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8 | $ cd /usr/local/etc/nagios |
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9 | |
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10 | 2. Copy Nagios sample files |
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11 | |
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12 | To do this, make sure you are in Nagios working directory from the first step |
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13 | There are Nagios's sample files in the directory, which we need to copy them |
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14 | as working copies. The easiest is to become temporarily root, and rename |
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15 | the files: |
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16 | |
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17 | $ sudo -s |
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18 | |
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19 | You can then copy the commands below: |
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20 | |
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21 | cp cgi.cfg-sample cgi.cfg |
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22 | cp nagios.cfg-sample nagios.cfg |
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23 | cp resource.cfg-sample resource.cfg |
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24 | cp objects/commands.cfg-sample objects/commands.cfg |
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25 | cp objects/contacts.cfg-sample objects/contacts.cfg |
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26 | cp objects/localhost.cfg-sample objects/localhost.cfg |
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27 | cp objects/templates.cfg-sample objects/templates.cfg |
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28 | cp objects/timeperiods.cfg-sample objects/timeperiods.cfg |
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29 | |
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30 | # exit |
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31 | $ |
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32 | |
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33 | 3. Create monitoring configuration files for DNS Servers |
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34 | |
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35 | While are you still in Nagios working directory, create a new file for DNS servers monitoring |
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36 | |
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37 | Change the following below: |
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38 | xx: your group number |
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39 | yy: group number of your slave server |
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40 | MYTLD: your zone name |
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41 | |
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42 | $ sudo vi objects/dns-servers.cfg |
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43 | |
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44 | - - - - - - - - - - - - - - - - - cut below - - - - - - - - - - - - - - - |
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45 | |
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46 | ### Define the host server |
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47 | |
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48 | define host{ |
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49 | use freebsd-server |
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50 | host_name master |
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51 | alias master |
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52 | address 10.10.xx.1 |
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53 | } |
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54 | |
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55 | define host{ |
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56 | use freebsd-server |
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57 | host_name cache |
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58 | alias cache |
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59 | address 10.10.xx.3 |
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60 | } |
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61 | |
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62 | define host{ |
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63 | use freebsd-server |
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64 | host_name slave |
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65 | alias slave |
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66 | address 10.10.yy.1 |
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67 | } |
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68 | |
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69 | ### Define the group |
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70 | |
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71 | define hostgroup{ |
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72 | hostgroup_name dns-servers |
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73 | alias DNS Servers |
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74 | members cache,master,slave |
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75 | } |
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76 | |
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77 | ### Define Services |
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78 | |
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79 | define service { |
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80 | use generic-service ; Name of service template to use |
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81 | hostgroup_name dns-servers |
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82 | service_description PING |
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83 | check_command check_ping!100.0,20%!500.0,60% |
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84 | } |
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85 | |
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86 | define service { |
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87 | use generic-service ; Name of service template to use |
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88 | hostgroup_name dns-servers |
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89 | service_description Check DNS |
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90 | check_command check_dns!www.MYTLD |
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91 | } |
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92 | |
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93 | - - - - - - - - - - - - - - - - - cut end - - - - - - - - - - - - - - - |
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94 | |
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95 | 4. Add check_dns service |
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96 | |
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97 | By default, Nagios doesn't configure check_dns service, we need to add line below into commands.cfg |
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98 | |
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99 | $ sudo vi objects/commands.cfg |
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100 | |
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101 | - Place this below the check_nt service check definition: |
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102 | |
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103 | - - - - - - - - - - - - - - - - - cut below - - - - - - - - - - - - - - - |
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104 | |
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105 | define command{ |
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106 | command_name check_dns |
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107 | command_line $USER1$/check_dns -s $HOSTADDRESS$ -H $ARG1$ |
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108 | } |
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109 | |
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110 | - - - - - - - - - - - - - - - - - cut end - - - - - - - - - - - - - - - |
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111 | |
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112 | 5. Enable DNS monitoring group in Nagios configuration files |
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113 | |
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114 | Now you have DNS Server monitoring files (dns-server.cfg) created. We need to enable on nagios.cfg file for monitoring |
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115 | |
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116 | $ sudo vi /usr/local/etc/nagios/nagios.cfg |
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117 | |
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118 | Look for the line "cfg_file=/usr/local/etc/nagios/objects/localhost.cfg" and add below content |
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119 | |
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120 | - - - - - - - - - - - - - - - - - cut below - - - - - - - - - - - - - - - |
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121 | |
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122 | # Definition for DNS servers |
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123 | cfg_file=/usr/local/etc/nagios/objects/dns-servers.cfg |
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124 | |
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125 | - - - - - - - - - - - - - - - - - cut end - - - - - - - - - - - - - - - |
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126 | |
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127 | |
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128 | 6. Enable Nagios service |
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129 | |
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130 | To enable nagios service add the line below in /etc/rc.conf |
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131 | |
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132 | nagios_enable="YES" |
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133 | |
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134 | |
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135 | 7. Start Nagios service |
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136 | |
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137 | To start nagios service |
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138 | |
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139 | $ sudo service nagios start |
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140 | |
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141 | Nagios should be running right now without any error report. |
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142 | |
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143 | |
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144 | 8. Create Apache password authentication file for Nagios |
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145 | |
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146 | Nagios required authentication via http to gain admin access to it web interface. |
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147 | Let's create the password file |
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148 | |
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149 | $ sudo -s |
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150 | # htpasswd -c /usr/local/etc/apache22/nagios.auth nagiosadmin |
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151 | # exit |
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152 | $ |
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153 | |
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154 | Set your desire password (perhaps, use the class password) |
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155 | |
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156 | Password file is now created |
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157 | |
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158 | 9. Create Nagios' Apache configuration for web interface access |
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159 | |
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160 | Go to Apache Includes directory |
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161 | |
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162 | $ cd /usr/local/etc/apache22/Includes |
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163 | |
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164 | If there already is a nagios.conf file in the directory, we wil |
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165 | remove and rebuild it. Our new configuration is significantly different. |
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166 | To do this do: |
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167 | |
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168 | $ sudo rm nagios.conf |
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169 | |
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170 | Then edit the file: |
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171 | |
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172 | $ sudo vi nagios.conf |
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173 | |
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174 | Add the lines below into the file: |
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175 | |
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176 | - - - - - - - - - - - - - - - - - cut below - - - - - - - - - - - - - - - |
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177 | |
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178 | AddType application/x-httpd-php .php |
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179 | AddType application/x-httpd-php-source .phps |
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180 | |
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181 | ScriptAlias /nagios/cgi-bin/ /usr/local/www/nagios/cgi-bin/ |
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182 | Alias /nagios/ /usr/local/www/nagios/ |
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183 | |
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184 | <Directory "/usr/local/www/nagios/cgi-bin"> |
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185 | Options ExecCGI |
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186 | AllowOverride None |
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187 | Order allow,deny |
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188 | Allow from all |
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189 | AuthName "Nagios Access" |
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190 | AuthType Basic |
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191 | Require valid-user |
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192 | AuthUserFile /usr/local/etc/apache22/nagios.auth |
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193 | </Directory> |
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194 | |
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195 | <Directory "/usr/local/www/nagios"> |
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196 | AllowOverride None |
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197 | Order allow,deny |
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198 | Allow from all |
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199 | AuthName "Nagios Access" |
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200 | AuthType Basic |
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201 | Require valid-user |
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202 | AuthUserFile /usr/local/etc/apache22/nagios.auth |
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203 | </Directory> |
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204 | |
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205 | - - - - - - - - - - - - - - - - - cut end - - - - - - - - - - - - - - - |
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206 | |
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207 | 10. Now, edit the main apache config. |
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208 | |
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209 | $ sudo vi /usr/local/etc/apache22/httpd.conf |
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210 | |
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211 | Find the line: |
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212 | |
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213 | DirectoryIndex index.html |
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214 | |
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215 | And change it to: |
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216 | |
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217 | DirectoryIndex index.html index.php |
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218 | |
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219 | |
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220 | 11. Enable and start Apache web service if required, by adding this |
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221 | to /etc/rc.conf |
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222 | |
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223 | $ sudo vi /etc/rc.conf |
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224 | |
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225 | apache22_enable="YES" |
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226 | |
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227 | (Save file and exit) |
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228 | |
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229 | $ sudo service apache22 restart |
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230 | |
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231 | 12. Access to Nagios web page via http://10.10.xxx.1/nagios/ |
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232 | |
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233 | You will need to user "nagiosadmin" as the user and the password you |
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234 | specified previously using the "htpasswd" command. |
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235 | |
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236 | Take a looking around the Nagios interface to see what is being |
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237 | reported. |
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238 | |
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