91 lines
3.4 KiB
Lua
91 lines
3.4 KiB
Lua
-- Copyright 2015 Mirantis, Inc.
|
|
--
|
|
-- Licensed under the Apache License, Version 2.0 (the "License");
|
|
-- you may not use this file except in compliance with the License.
|
|
-- You may obtain a copy of the License at
|
|
--
|
|
-- http://www.apache.org/licenses/LICENSE-2.0
|
|
--
|
|
-- Unless required by applicable law or agreed to in writing, software
|
|
-- distributed under the License is distributed on an "AS IS" BASIS,
|
|
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
-- See the License for the specific language governing permissions and
|
|
-- limitations under the License.
|
|
|
|
require 'string'
|
|
|
|
local afd = require 'afd'
|
|
local consts = require 'gse_constants'
|
|
|
|
local haproxy_backend_states = {}
|
|
|
|
-- emit AFD event metrics based on HAProxy backends
|
|
function process_message()
|
|
local metric_name = read_message('Fields[name]')
|
|
local value = read_message('Fields[value]')
|
|
local service = read_message('Fields[backend]')
|
|
local state = consts.OKAY
|
|
|
|
if not haproxy_backend_states[service] then
|
|
haproxy_backend_states[service] = {}
|
|
end
|
|
haproxy_backend_states[service][read_message('Fields[state]')] = value
|
|
|
|
if not (haproxy_backend_states[service].up and haproxy_backend_states[service].down) then
|
|
-- not enough data for now
|
|
return 0
|
|
end
|
|
|
|
if haproxy_backend_states[service].up == 0 then
|
|
state = consts.DOWN
|
|
afd.add_to_alarms(consts.DOWN,
|
|
'last',
|
|
metric_name,
|
|
{{name='service',value=service},{name='state',value='up'}},
|
|
{},
|
|
'==',
|
|
haproxy_backend_states[service].up,
|
|
0,
|
|
nil,
|
|
nil,
|
|
string.format("All %s backends are down", service))
|
|
elseif haproxy_backend_states[service].down >= haproxy_backend_states[service].up then
|
|
state = consts.CRIT
|
|
afd.add_to_alarms(consts.CRIT,
|
|
'last',
|
|
metric_name,
|
|
{{name='service',value=service},{name='state',value='down'}},
|
|
{},
|
|
'>=',
|
|
haproxy_backend_states[service].down,
|
|
haproxy_backend_states[service].up,
|
|
nil,
|
|
nil,
|
|
string.format("More backends for %s are down than up", service))
|
|
elseif haproxy_backend_states[service].down > 0 then
|
|
state = consts.WARN
|
|
afd.add_to_alarms(consts.WARN,
|
|
'last',
|
|
metric_name,
|
|
{{name='service',value=service},{name='state',value='down'}},
|
|
{},
|
|
'>',
|
|
haproxy_backend_states[service].down,
|
|
0,
|
|
nil,
|
|
nil,
|
|
string.format("At least one %s backend is down", service))
|
|
end
|
|
|
|
afd.inject_afd_service_metric(service,
|
|
state,
|
|
read_message('Fields[hostname]'),
|
|
0,
|
|
'backends')
|
|
|
|
-- reset the cache for this service
|
|
haproxy_backend_states[service] = {}
|
|
|
|
return 0
|
|
end
|