Add support for event-handler

[titom73]

Summary

Add support of event-handler in following roles:

• eos_l3ls_evpn
• eos_cli_config_gen

In order to make data model easier to maintain, when it is used with eos_l3ls_evpn role, event_handler block should be placed on group_vars targeting set of expecting devices:

• group_vars/DC1_FABRIC.yml to apply on all eos devices
• group_vars/DC1_SPINES.yml to apply on all spine devices
• group_vars/DC1_L3LEAFS.yml to apply on all l3leaf devices

Inputs:

event_handler:
  evpn-blacklist-recovery:
    action_type: bash
    action: FastCli -p 15 -c “clear bgp evpn host-flap”
    delay: 300
    trigger: on-logging
    regex:  EVPN-3-BLACKLISTED_DUPLICATE_MAC
    asynchronous: true

Generated outputs:

• EOS Configuration:

event-handler evpn-blacklist-recovery
   action bash FastCli -p 15 -c “clear bgp evpn host-flap”
   delay 300
   asynchronous
   !
   trigger on-logging
      regex EVPN-3-BLACKLISTED_DUPLICATE_MAC
!

• EOS Documentation:

• Documentation Update

  • eos_cli_config_gen: README file
  • eos_l3ls_config_gen: README file

[carlbuchmann]

LGTM