{"id":955,"date":"2013-05-27T15:48:31","date_gmt":"2013-05-27T05:48:31","guid":{"rendered":"http:\/\/howden.net.au\/thowden\/?p=955"},"modified":"2013-05-27T15:48:31","modified_gmt":"2013-05-27T05:48:31","slug":"sme-server-as-a-nagios-nrpe-client-only","status":"publish","type":"post","link":"https:\/\/howden.net.au\/thowden\/2013\/05\/sme-server-as-a-nagios-nrpe-client-only\/","title":{"rendered":"SME Server as a Nagios NRPE Client only"},"content":{"rendered":"

If you are wanting to install Nagios on an SME Server version 8 then you will probably start with the Wiki Contribs page for a Nagios Server install. http:\/\/wiki.contribs.org\/Nagios<\/a><\/p>\n

Which is going to lead you down a path of installing a complete Nagios Server assuming you overcome the issues with those instructions.<\/p>\n

But if you have a Nagios Server elsewhere and you want to just add the SME Server as a client then a different set of instructions can be found in the forums.<\/p>\n

http:\/\/forums.contribs.org\/index.php\/topic,48587.msg241615.html#msg241615<\/a><\/p>\n

Which is really helpful but is missing a couple of key points for a complete set of instructions. So here is a re-write of that instruction set.<\/p>\n

NRPE SME Server 8 Installation<\/h2>\n

1. Configure the dag repository<\/p>\n

The following command will configure the dag repository on SME Server.<\/p>\n

[text]<\/p>\n

\/sbin\/e-smith\/db yum_repositories set dag repository
\n Name ‘Dag – EL5’
\n BaseURL ‘<a href="http:\/\/apt.sw.be\/redhat\/el5\/en\/" target="_blank">http:\/\/apt.sw.be\/redhat\/el5\/en\/<\/a>$basearch\/dag’
\n EnableGroups no
\n GPGCheck yes
\n GPGKey <a href="http:\/\/dag.wieers.com\/packages\/RPM-GPG-KEY.dag.txt" target="_blank">http:\/\/dag.wieers.com\/packages\/RPM-GPG-KEY.dag.txt<\/a>
\n Visible no
\n Exclude freetype,htop,iptraf,rsync,syslinux
\n status disabled<\/p>\n

[\/text]<\/p>\n

2. After adding it to the database we have to update the changes to the configuration file:<\/p>\n

[text]signal-event yum-modify[\/text]<\/p>\n

3. Then run this to enable the repo<\/p>\n

[text]<\/p>\n

\/usr\/bin\/yum –enablerepo=dag install
\n nagios-plugins
\n nagios-plugins-setuid
\n perl-Config-Tiny
\n perl-Class-Accessor<\/p>\n

[\/text]<\/p>\n

4. Copy nrpe rpm’s<\/p>\n

Current download for the files are:<\/p>\n

http:\/\/pkgs.repoforge.org\/nagios\/nagios-3.2.1-5.el5.rf.i386.rpm<\/a><\/p>\n

http:\/\/pkgs.repoforge.org\/nagios-nrpe\/nagios-nrpe-2.5.2-1.el5.rf.i386.rpm<\/a><\/p>\n

http:\/\/pkgs.repoforge.org\/nagios-nrpe\/nagios-plugins-nrpe-2.5.2-1.el5.rf.i386.rpm<\/a><\/p>\n

5.\u00a0Install the nrpe rpm’s<\/p>\n

[text]<\/p>\n

yum localinstall nagios-3.2.1-5.el5.rf.i386.rpm
\n yum localinstall nagios-nrpe-2.5.2-1.el5.rf.i386.rpm
\n yum localinstall nagios-plugins-nrpe-2.5.2-1.el5.rf.i386.rpm<\/p>\n

[\/text]<\/p>\n

6. Modify the nrpe.cfg file to allow the external ip of your Nagios server\u00a0 (swap vim for your favourite editor)<\/p>\n

[text]<\/p>\n

vim \/etc\/nagios\/nrpe.cfg<\/p>\n

[\/text]<\/p>\n

the allowed_hosts parameter is already in the file, remove the # from the start of the line and add your nagios server ip<\/p>\n

[text]<\/p>\n

allowed_hosts=127.0.0.1,nagios.server.ip.here<\/p>\n

[\/text]<\/p>\n

Save the file and exit.<\/p>\n

7. Add the service<\/p>\n

[text]<\/p>\n

cd \/etc\/rc7.d<\/p>\n

cp -s \/etc\/init.d\/nrpe S95nrpe<\/p>\n

[\/text]<\/p>\n

8. Port forward 5666 to localhost (swap vim for your favourite editor)<\/p>\n

a)<\/p>\n

[text]<\/p>\n

mkdir -p \/etc\/e-smith\/templates-custom\/etc\/hosts.allow\/<\/p>\n

[\/text]<\/p>\n

(if you get an error it means the directory already exists.)<\/p>\n

b)<\/p>\n

[text]<\/p>\n

vim \/etc\/e-smith\/templates-custom\/etc\/hosts.allow\/nrpe<\/p>\n

[\/text]<\/p>\n

and add the following lines to the nrpe file, adding your nagios server ip<\/p>\n

[text]<\/p>\n

{
\n $OUT="nrpe: " . ($nrpe{HostsAllow} ? $nrpe{HostsAllow} : "127.0.0.1 nagios.server.ip.here" );
\n }<\/p>\n

[\/text]<\/p>\n

Save the file and exit.<\/p>\n

9. Configure the new template<\/p>\n

[text]<\/p>\n

expand-template \/etc\/hosts.allow<\/p>\n

[\/text]<\/p>\n

10. Start NRPE<\/p>\n

[text]<\/p>\n

service nrpe restart<\/p>\n

[\/text]<\/p>\n

And then off to your Nagios server to add the new SME Server as a client.<\/p>\n","protected":false},"excerpt":{"rendered":"

If you are wanting to install Nagios on an SME Server version 8 then you will probably start with the Wiki Contribs page for a Nagios Server install. http:\/\/wiki.contribs.org\/Nagios Which is going to lead you down a path of installing a complete Nagios Server assuming you overcome the issues with those instructions. But if you […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,16,1],"tags":[],"class_list":["post-955","post","type-post","status-publish","format-standard","hentry","category-nagios","category-sme-server","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/posts\/955","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/comments?post=955"}],"version-history":[{"count":0,"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/posts\/955\/revisions"}],"wp:attachment":[{"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/media?parent=955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/categories?post=955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/tags?post=955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}