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Aggregierte
Logging Patterns
Philipp Krenn @xeraa
@xeraa
@xeraa
@xeraa
@xeraa
@xeraa
@xeraa
@xeraa
@xeraa
@xeraa
Developer
@xeraa
@xeraa
@xeraa
@xeraa
@xeraa
@xeraa
Disclaimer
I build highly monitored Hello World
apps
@xeraa
Example: Java
SLF4J, Logback, MDC
with logstash-logback-encoder
Alternative https://github.com/vy/log4j2-logstash-layout
@xeraa
And Everywhere Else
.NET: NLog
JavaScript: Winston
Python: structlog
PHP: Monolog
@xeraa
Anti-Pattern: print
System.out.println("Oops");
@xeraa
Anti-Pattern: Coupling
@xeraa
Parse
@xeraa
@xeraa
Bind Mount Logs
java_app:
volumes:
- './logs-docker/:/logs/'
...
filebeat_for_logstash:
volumes:
- './logs-docker/:/mnt/logs/:ro'
...
@xeraa
Collect Log Lines
filebeat.inputs:
- type: log
paths:
- /mnt/logs/*.log
@xeraa
Metadata
processors:
- add_host_metadata: ~
@xeraa
Test Multiline Pattern
https://www.elastic.co/guide/en/beats/filebeat/current/
_test_your_regexp_pattern_for_multiline.html
@xeraa
Grok
https://github.com/logstash-plugins/logstash-patterns-core/blob/
master/patterns/grok-patterns
@xeraa
Dev Tools
Grok Debugger
@xeraa
[2018-09-28 10:30:38.516] ERROR net.xeraa.logging.LogMe [main] -
user_experience= , session=46, loop=15 -
Wake me up at night
java.lang.RuntimeException: Bad runtime...
at net.xeraa.logging.LogMe.main(LogMe.java:30)
^[%{TIMESTAMP_ISO8601:@timestamp}]%{SPACE}%{LOGLEVEL:log.level}
%{SPACE}%{USERNAME:log.package}%{SPACE}[%{WORD:log.method}]
%{SPACE}-%{SPACE}%{GREEDYDATA:log.labels}%{SPACE}-%{SPACE}
%{GREEDYDATA:message}(?:n+(?<stacktrace>(?:.|r|n)+))?
@xeraa
Elastic Common
Schema
https://github.com/elastic/ecs
@xeraa
Machine Learning
Data Visualizer
@xeraa
Logstash Key Value Filter for MDC
kv {
source => "labels"
field_split => ","
trim_key => " "
}
@xeraa
Monitoring:
Logstash Pipeline
Plus other components
@xeraa
Pro: No change
Con: Regular expression, multiline,
format changes
@xeraa
Send
@xeraa
@xeraa
logback.xml
<appender name="logstash" class="net.logstash.logback.appender.LogstashAccessTcpSocketAppender">
<destination>logstash:4560</destination>
<encoder class="net.logstash.logback.encoder.LogstashEncoder"/>
</appender>
@xeraa
Pro: No files
Con: Outages & coupling
@xeraa
Structure
@xeraa
@xeraa
Collect JSON
filebeat.input:
- type: log
paths:
- /mnt/logs/*.json
json:
message_key: message
keys_under_root: true
@xeraa
Stack(trace) Hash
@xeraa
Bonues: Multi-Index
output.elasticsearch:
hosts: ["http://localhost:9200"]
indices:
- index: "warning-%{[agent.version]}-%{+yyyy.MM.dd}"
when.contains:
message: "WARN"
- index: "error-%{[agent.version]}-%{+yyyy.MM.dd}"
when.contains:
message: "ERR"
@xeraa
Pro: Right format
Con: JSON serialization overhead
@xeraa
Containerize
@xeraa
@xeraa
Where to put Filebeat?
Sidecar
@xeraa
@xeraa
https://github.com/elastic/beats/tree/
master/deploy/docker
@xeraa
Docker Logs
filebeat.autodiscover:
providers:
- type: docker
hints.enabled: true
processors:
- add_docker_metadata: ~
@xeraa
Metadata
No Docker metadata with the other methods
@xeraa
"docker": {
"container": {
"labels": {
"app": "fizzbuzz",
"co_elastic_logs/multiline_match": "after",
"com_docker_compose_config-hash": "41520c6cf2b6a1f3dae4f16d0a6fd76760cdfc38fbfe43a3a3be2e09bdd1b8b5",
"environment": "production",
"co_elastic_logs/multiline_pattern": "^[",
"co_elastic_logs/multiline_negate": "true",
"com_docker_compose_oneoff": "False",
"com_docker_compose_project": "java-logging",
"com_docker_compose_service": "java_app",
"com_docker_compose_container-number": "1",
"com_docker_compose_version": "1.23.2"
}
}
}
@xeraa
Missing the Last Line
Waiting for the newline
@xeraa
Hints
labels:
- "app=fizzbuzz"
- "co.elastic.logs/multiline.pattern=^["
- "co.elastic.logs/multiline.negate=true"
- "co.elastic.logs/multiline.match=after"
@xeraa
Registry File
filebeat.registry.path: /usr/share/filebeat/data/registry
@xeraa
Ingest Pipeline
output.elasticsearch:
hosts: ["http://elasticsearch:9200"]
index: "docker"
pipelines:
- pipeline: "parse_java"
when.contains:
container.name: "java_app"
@xeraa
Ingest Pipeline
{
"description" : "Parse Java log lines",
"processors": [
{
"grok": {
"field": "message",
"patterns": [ "^[%{TIMESTAMP_ISO8601:timestamp}]%{SPACE}%{LOGLEVEL:log.level}
%{SPACE}%{USERNAME:log.package}%{SPACE}[%{WORD:log.method}]%{SPACE}-
%{SPACE}%{GREEDYDATA:labels}%{SPACE}-%{SPACE}%{GREEDYDATA:message_parsed}
(?:n+(?<stacktrace>(?:.|r|n)+))?" ],
"ignore_failure": true
}
}
]
}
@xeraa
Unknown Fields
@xeraa
ASCII Art
_._
_.-``__ ''-._
_.-`` `. `_. ''-._ Redis 4.0.9 (00000000/0) 64 bit
.-`` .-```. ```/ _.,_ ''-._
( ' , .-` | `, ) Running in stand alone mode
|`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
| `-._ `._ / _.-' | PID: 55757
`-._ `-._ `-./ _.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' | http://redis.io
`-._ `-._`-.__.-'_.-' _.-'
|`-._`-._ `-.__.-' _.-'_.-'|
| `-._`-._ _.-'_.-' |
`-._ `-._`-.__.-'_.-' _.-'
`-._ `-.__.-' _.-'
`-._ _.-'
`-.__.-'
@xeraa
Configuration Templates
filebeat.autodiscover:
providers:
- type: docker
templates:
- condition:
equals:
docker.container.image: redis
config:
- type: docker
containers.ids:
- "${data.docker.container.id}"
exclude_lines: ["^s+[-`('.|_]"]
@xeraa
Who Logs the Logger
Avoid loops
Process without -e
filebeat.yml: logging.to_files: true
@xeraa
Pro: Hot
Con: Complexity
@xeraa
Orchestrate
@xeraa
@xeraa
Where to put Filebeat?
DaemonSet
@xeraa
https://github.com/elastic/beats/tree/
master/deploy/kubernetes
@xeraa
Metadata
Either in cluster or outside
processors:
- add_kubernetes_metadata:
in_cluster: true
- add_kubernetes_metadata:
in_cluster: false
host: <hostname>
kube_config: ${HOME}/.kube/config
@xeraa
{
"host": "172.17.0.21",
"port": 9090,
"kubernetes": {
"container": {
"id": "382184ecdb385cfd5d1f1a65f78911054c8511ae009635300ac28b4fc357ce51",
"image": "my-java:1.0.0",
"name": "my-java"
},
"labels": {
"app": "java",
},
"namespace": "default",
"node": {
"name": "minikube"
},
"pod": {
"name": "java-2657348378-k1pnh"
}
},
}
@xeraa
More Metadata
Add: Cloud, local timezone, process
Drop: Events, fields
Rename: Fields
Dissect, DNS reverse lookup
@xeraa
Configuration Templates
filebeat.autodiscover:
providers:
- type: kubernetes
templates:
- condition:
equals:
kubernetes.namespace: redis
config:
- type: docker
containers.ids:
- "${data.kubernetes.container.id}"
exclude_lines: ["^s+[-`('.|_]"]
@xeraa
Customize Indices
output.elasticsearch:
index: "%{[kubernetes.namespace]:filebeat}-%{[beat.version]}-%{+yyyy.MM.dd}"
@xeraa
Pro: Hot
Con: Complexity++
@xeraa
Moar
@xeraa
Index Patterns
Time based (default: daily)
Versioned
@xeraa
Sizing
Daily volume * Retention * Replication
Number of shards
@xeraa
Index Lifecycle Management
! "
@xeraa
Order
https://github.com/elastic/elasticsearch/blob/7.1/x-pack/plugin/core/src/main/java/org/elasticsearch/
xpack/core/indexlifecycle/TimeseriesLifecycleType.java
static final List<String> ORDERED_VALID_HOT_ACTIONS = Arrays.asList(
SetPriorityAction.NAME, UnfollowAction.NAME, RolloverAction.NAME
);
static final List<String> ORDERED_VALID_WARM_ACTIONS = Arrays.asList(
SetPriorityAction.NAME, UnfollowAction.NAME, ReadOnlyAction.NAME,
AllocateAction.NAME, ShrinkAction.NAME, ForceMergeAction.NAME
);
static final List<String> ORDERED_VALID_COLD_ACTIONS = Arrays.asList(
SetPriorityAction.NAME, UnfollowAction.NAME, AllocateAction.NAME, FreezeAction.NAME
);
static final List<String> ORDERED_VALID_DELETE_ACTIONS = Arrays.asList(
DeleteAction.NAME
);
@xeraa
Frozen Indices
https://www.elastic.co/guide/en/elasticsearch/reference/6.6/
frozen-indices.html
@xeraa
Ratio Heap : Storage
Index > Frozen Index > Closed Index
Read-only
@xeraa
Throttled Thread Pool
1 parallel search / node
100 in queue
@xeraa
Conclusion
@xeraa
Examples
https://github.com/xeraa/java-logging
@xeraa
Parse
Send
Structure
Containerize
Orchestrate
@xeraa
Questions?
Philipp Krenn @xeraa
@xeraa

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