Heka Decoders: различия между версиями
Sirmax (обсуждение | вклад) |
Sirmax (обсуждение | вклад) |
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| Строка 41: | Строка 41: | ||
[test_decoder] |
[test_decoder] |
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type = "SandboxDecoder" |
type = "SandboxDecoder" |
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| − | filename = "/usr/share/lma_collector/decoders/ |
+ | filename = "/usr/share/lma_collector/decoders/test_decoder.lua" |
</PRE> |
</PRE> |
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<syntaxhighlight lang="lua"> |
<syntaxhighlight lang="lua"> |
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| − | at mm.lua |
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| − | |||
| − | |||
| − | |||
| ⚫ | |||
| − | -- :Type: heka.sandbox.metric |
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| ⚫ | |||
| ⚫ | |||
| − | -- :Uuid: bc7d6ecd-d00c-4b1a-ad38-a593f092e0fc |
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| − | -- :Logger: http_metrics_filter |
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| ⚫ | |||
| ⚫ | |||
| ⚫ | |||
| ⚫ | |||
| ⚫ | |||
| − | -- | name:"source" type:string value:"heat-api-cloudwatch" |
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| ⚫ | |||
| − | -- | name:"openstack_roles" type:string value:"primary-controller" |
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| − | -- | name:"deployment_mode" type:string value:"ha_compact" |
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| − | -- | name:"openstack_release" type:string value:"2015.1.0-7.0" |
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| − | -- | name:"tag_fields" type:string value:["http_method","http_status"] |
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| − | -- | name:"openstack_region" type:string value:"RegionOne" |
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| − | -- | name:"name" type:string value:"openstack_heat_http_responses" |
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| − | -- | name:"hostname" type:string value:"node-6" |
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| − | -- | name:"value" type:double value:0.000433 representation:"s" |
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| − | -- | name:"http_method" type:string value:"OPTIONS" |
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| − | -- | name:"environment_label" type:string value:"test2" |
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| − | -- | name:"http_status" type:string value:"300" |
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| − | |||
require "string" |
require "string" |
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| − | -- require "io" |
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| − | |||
local msg = { |
local msg = { |
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| − | Type = " |
+ | Type = "test_decoder", |
Payload = nil, |
Payload = nil, |
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Fields = {} |
Fields = {} |
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} |
} |
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| ⚫ | |||
| − | |||
| − | total = 0 -- preserved between restarts since it is in global scope |
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| − | local count = 0 -- local scope so this will not be preserved |
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function process_message () |
function process_message () |
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| − | total= total + 1 |
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count = count + 1 |
count = count + 1 |
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| − | |||
| − | -- file = io.open ("/var/log/heka-a.log", a) |
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| − | |||
| − | |||
local data = read_message("Payload") |
local data = read_message("Payload") |
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| − | msg.Fields. |
+ | msg.Fields.test_decoderData = data |
| − | msg.Fields. |
+ | msg.Fields.test_decoderCount = count |
| − | msg.Fields.mmTotal = total |
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inject_message(msg) |
inject_message(msg) |
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| − | |||
| − | -- io.close(file) |
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| − | |||
return 0 |
return 0 |
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end |
end |
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| ⚫ | |||
| − | function timer_event(ns) |
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| − | -- local msg = { |
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| − | -- Type = "test.mm.decoder.timer_event", |
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| − | -- Payload = nil, |
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| − | -- Fields = {} |
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| − | --} |
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| ⚫ | |||
| − | -- inject_message(msg) |
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| − | -- inject_payload("txt", "", |
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| − | -- string.format("%d messages in the last minute; total=%d", count, total)) |
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| − | end |
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| + | <PRE> |
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| − | |||
| ⚫ | |||
| − | -- function process_message() |
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| + | :Type: test_decoder |
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| − | -- local data = read_message("Payload") |
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| ⚫ | |||
| − | -- msg.Fields = grammar:match(data) |
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| ⚫ | |||
| − | -- |
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| + | :Uuid: 199a7eea-7020-43a1-a593-a6781da1335f |
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| − | -- if not msg.Fields then |
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| + | :Logger: test_input |
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| − | -- return -1 |
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| ⚫ | |||
| − | -- end |
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| ⚫ | |||
| − | -- |
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| ⚫ | |||
| − | -- if payload_keep then |
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| ⚫ | |||
| − | -- msg.Payload = data |
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| ⚫ | |||
| − | -- end |
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| ⚫ | |||
| − | -- |
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| + | </PRE> |
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| − | -- msg.Fields.FilePath = read_message("Fields[FilePath]") |
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| − | -- inject_message(msg) |
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| − | -- return 0 |
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| ⚫ | |||
Версия 18:13, 31 января 2016
Heka Decoders
Decoders parse the contents of the inputs to extract data from the text format and map them onto a Heka message schema. List of all available decoders: https://hekad.readthedocs.org/en/v0.10.0/config/decoders/index.html
On controller we have the follwing decoders configured:
- decoder-collectd.toml
- decoder-http-check.toml
- decoder-keystone_7_0.toml
- decoder-keystone_wsgi.toml
- decoder-mysql.toml
- decoder-notification.toml
- decoder-openstack.toml
- decoder-ovs.toml
- decoder-pacemaker.toml
- decoder-rabbitmq.toml
- decoder-swift.toml
- decoder-system.toml
All custom decoders decoders are SandboxDecoder
SandboxDecoder simple example
Sandbox documentation: https://hekad.readthedocs.org/en/v0.10.0/sandbox/index.html
Sandbox decoder is complex part of Heka, so for better understanding there it is possible to create simple input and simple decoder.
Idea is
- use the same input source as was used in collectd (read data from file "/var/log/collectd_in_data")
- use lua-based decoder to decode input data
Input
The best way to poll file is Heka. FilePollingInput. Configuration is pretty simple, this input plugin read data from file every ticker_interval.
FilePollingInput can be used to get data from /proc file system, e.g. from /proc/loadavg. One more example is application which rewrites 'stats' files.
E.g. we have the following configuration:
[test_input] type = "FilePollingInput" ticker_interval = 1 file_path = "/var/log/collectd_in_data" decoder = "test_decoder"
Decoder
Decoder in general are getting data from input plugins and convert it into Heka internal format.
[test_decoder] type = "SandboxDecoder" filename = "/usr/share/lma_collector/decoders/test_decoder.lua"
<syntaxhighlight lang="lua"> require "string"
local msg = {
Type = "test_decoder",
Payload = nil,
Fields = {}
}
local count = 0
function process_message ()
count = count + 1
local data = read_message("Payload")
msg.Fields.test_decoderData = data
msg.Fields.test_decoderCount = count
inject_message(msg)
return 0
end </syntaxhighlight>
:Timestamp: 2016-01-30 22:28:04 +0000 UTC
:Type: test_decoder
:Hostname: node-6
:Pid: 0
:Uuid: 199a7eea-7020-43a1-a593-a6781da1335f
:Logger: test_input
:Payload:
:EnvVersion:
:Severity: 7
:Fields:
| name:"test_decoderData" type:string value:"888999888"
| name:"test_decoderCount" type:double value:34
