Adds functionality to generate bash script which verifies health of current
keepalived instance by pinging all available and configured GW addresses.
This functionality supports IPv4 and IPv6 by detecting needed ping version
using netaddr.
DocImpact:
Added a new parameter to 'l3_agent.ini' named
'ha_vrrp_health_check_interval' which is by default set to 0 (disabled).
Values > 0 designate health check functionality should be enabled.
Requires allowed ICMP ECHO_REQUEST because that is disabled by default.
Co-Authored-By: Artur Korzeniewski <artur.korzeniewski@intel.com>
Change-Id: Ib4d0691f432830357ea3f113036719645bc59a62
Closes-Bug: #1365461
185d6cbc64