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[Andre Ruiz <1882302@xxxxxxxxxxxxxxxxxx>]

Preliminary functional tests passed (activating and deactivating traps function behave as expected and no other functionality seems to be affected).

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https://bugs.launchpad.net/bugs/1882302

Title:
  Enable sending snmp traps funcionality

Status in Nagios Charm:
  New

Bug description:
  This is an enhancement request.

  Currently nagios charm does not have the functionality of sending snmp
  traps. It's relatively simple to implement this functionality.

  This has been implemented and tested in the field and proved to work
  well. It sould be further improved (like for example creating a charm
  option for the IP address of the server to send traps to and turning
  extraconfig and scripts into templates).

  This is the way it is working today:

  ------------------------------>8======================================

  1) Configure Juju:

  juju config nagios contactgroup-members="root,managementstation"

  juju config nagios extraconfig='
  #
  # this file was automaticaly generated by the nagios charm, do not edit it

  define command{
          command_name send-service-trap
          command_line /usr/local/bin/send-service-trap 10.129.162.181 public "$HOSTNAME$" "$SERVICEDESC$" $SERVICESTATEID$ "$SERVICEOUTPUT$"
  }

  define command{
          command_name send-host-trap
          command_line /usr/local/bin/send-host-trap 10.129.162.181 public "$HOSTNAME$" $HOSTSTATEID$ "$HOSTOUTPUT$"
  }

  define contact{
          contact_name                    managementstation
          alias                           Management Station
          service_notification_period     24x7
          host_notification_period        24x7
          service_notification_options    w,u,c,r,f,s
          host_notification_options       d,u,r,f,s
          service_notification_commands   send-service-trap
          host_notification_commands      send-host-trap
  }

  2) on the nagios/0 (or more if HA) machine, download some MIBs:

  wget -P /usr/share/snmp/mibs/ https://raw.githubusercontent.com/nagios-plugins/nagios-mib/master/MIB/NAGIOS-ROOT-MIB
  wget -P /usr/share/snmp/mibs/ https://raw.githubusercontent.com/nagios-plugins/nagios-mib/master/MIB/NAGIOS-NOTIFY-MIB
  wget -P /usr/share/snmp/mibs/ https://raw.githubusercontent.com/hardaker/net-snmp/master/mibs/SNMPv2-SMI.txt
  wget -P /usr/share/snmp/mibs/ https://raw.githubusercontent.com/hardaker/net-snmp/master/mibs/SNMPv2-MIB.txt
  wget -P /usr/share/snmp/mibs/ https://raw.githubusercontent.com/hardaker/net-snmp/master/mibs/SNMPv2-TC.txt

  3) Also on the nagios/0 (or more if HA) machine, create two scripts:

  cat >/usr/local/bin/send-service-trap <<EOF
  #!/bin/bash

  # Arguments:
  # \$1 = Management Station
  # \$2 = Community String
  # \$3 = host_name
  # \$4 = service_description (Description of the service)
  # \$5 = return_code (An integer that determines the state
  #       of the service check, 0=OK, 1=WARNING, 2=CRITICAL,
  #       3=UNKNOWN).
  # \$6 = plugin_output (A text string that should be used
  #       as the plugin output for the service check)
  #
  /usr/bin/snmptrap -v 2c -c $2 $1 '' NAGIOS-NOTIFY-MIB::nSvcEvent nSvcHostname s "$3" nSvcDesc s "$4" nSvcStateID i $5 nSvcOutput s "$6"
  EOF

  cat >/usr/local/bin/send-host-trap <<EOF
  #!/bin/bash

  # Arguments:
  # \$1 = Management Station
  # \$2 = Community String
  # \$3 = host_name
  # \$4 = HostStatID A number that corresponds to the current state of the host: 0=UP, 1=DOWN, 2=UNREACHABLE.
  # \$5 = HOSTOUTPUT The first line of text output from the last host check (i.e. "Ping OK").
  #
  /usr/bin/snmptrap -v 2c -c $2 $1 '' NAGIOS-NOTIFY-MIB::nHostEvent nHostname s "$3" nHostStateID i $4 nHostOutput s "$5"
  EOF

  chmod +x /usr/local/bin/send-service-trap /usr/local/bin/send-host-
  trap

  ------------------------------>8======================================

  This bug is open to track the implementation of these changes on the
  charm.

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