Monitor Your Containers

by Philipp Krenn

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Monitor Your Containers with the Stack Philipp Krenn̴̴̴̴̴@xeraa

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Infrastructure | Developer Advocate

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$ curl http://localhost:9200 { "name": "zDODSc4", "cluster_name": "docker-cluster", "cluster_uuid": "qbx3DVATRfWOgHB6uiLtNw", "version": { "number": "6.3.0", "build_flavor": "default", "build_type": "tar", "build_hash": "424e937", "build_date": "2018-06-11T23:38:03.357887Z", "build_snapshot": false, "lucene_version": "7.3.1", "minimum_wire_compatibility_version": "5.6.0", "minimum_index_compatibility_version": "5.0.0" }, "tagline": "You Know, for Search" }

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Filebeat

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tail -f ̴ ̴

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tail -f over the network ̴

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tail -f over the network on

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Parse & Enrich Logstash or Ingest-Node

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34.253.145.46 - - [06/Sep/2017:22:33:30 +0000] "GET /server-status HTTP/1.1" 200 97 "-" "Go-http-client/1.1" "-" "remote_ip": "34.253.145.46", "method": "GET", "url": "/server-status", "http_version": "1.1", "response_code": 200,

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"remote_ip": "34.253.145.46" "geoip": { "continent_name": "North America", "city_name": "Houston", "country_iso_code": "US", "region_name": "Texas", "location": { "lon": -95.5858, "lat": 29.6997 } }

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At-Least-Once Backpressure Graceful Downtime

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Filtering include_lines̴̴exclude_lines̴̴exclude_files filebeat.prospectors: - input_type: log paths: - /var/log/myapp/*.log include_lines: ["^ERR", "^WARN"]

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Multiline Exception in thread "main" java.lang.IllegalStateException: A book has a null property at com.example.myproject.Author.getBookIds(Author.java:38) at com.example.myproject.Bootstrap.main(Bootstrap.java:14) Caused by: java.lang.NullPointerException at com.example.myproject.Book.getId(Book.java:22) at com.example.myproject.Author.getBookIds(Author.java:35) ... 1 more multiline.pattern: '^[[:space:]]+|^Caused by:' multiline.negate: false multiline.match: after

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JSON Decode

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Filebeat Modules Apache2, Auditd, Icinga, IIS, Kafka, Logstash, MongoDB, MySQL, Nginx, Osquery, PostgreSQL, Redis, System, Traeﬁk

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Logging with Docker 101 options

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https://docs.docker.com/engine/admin/logging/overview/

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001 JSON-File Filebeat for JSON ➕ Simple, default, well integrated Metadata (name, labels,...) docker logs ➖ Potentially slow By default unlimited ﬁle size

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010 Syslog Local Syslog server and Filebeat ➕ Conﬁgurable path, rotation,... ➖ Custom Syslog server Metadaten serialized and deserialized Multiline

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011 Journald Filebeat ➕ Widely available Metadata docker logs ➖ Not yet supported by Filebeat (Community Beat: Journalbeat)

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100 GELF Logstash-GELF-Input ➕ Direct Logstash connection ➖ UDP — no ACK, no backpressure

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101 Volume Filebeat ➕ Simple installation (if app rotates logs) Scalable ➖ Metadata

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! Today: JSON, Syslog, Volume Future: Journald

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Docker Metadata - input_type: log paths: - /var/lib/docker/containers/*/*-json.log document_type: docker json.message_key: log processors: - add_docker_metadata: ~

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Kubernetes Metadata processors: - add_kubernetes_metadata: in_cluster: true

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Metricbeat

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Metricbeat System

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Metricbeat Service Many: https://www.elastic.co/guide/en/ beats/metricbeat/current/metricbeat- modules.html

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Read cgroup data from /proc/

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Part of the system module

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No Docker API access required Security

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All containers Docker, rkt, runC, LXD,...

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Enriches process information automatically with cgroup data

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No container names or labels

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But Docker...

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Dockerbeat https://github.com/Ingensi/dockerbeat

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Dockerbeat https://github.com/Ingensi/dockerbeat

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Dockbeat https://github.com/Ingensi/dockbeat

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Metricbeat 5.1+

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System Permissions $ docker run \ --volume=/proc:/hostfs/proc:ro \ --volume=/sys/fs/cgroup:/hostfs/sys/fs/cgroup:ro \ --volume=/:/hostfs:ro \ --net=host docker.elastic.co/beats/metricbeat:6.3.0 -system.hostfs=/hostfs

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Service Permissions $ docker run \ --link some-mysql:mysql \ -e MYSQL_PASSWORD=secret \ docker.elastic.co/beats/metricbeat:6.3.0

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Metricbeat and Docker

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Docker Metadata processors: - add_docker_metadata: ~

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Kubernetes Metadata processors: - add_kubernetes_metadata: in_cluster: true

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Kubernetes Metrics - module: kubelet metricsets: ["node", "container", "volume", "pod", "system"] hosts: ["localhost:10255"]

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Packetbeat

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Protocols

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Flows Application layer: Unsupported or encrypted protocols IP / TCP / UDP Number of packets & bytes Retransmissions Temporal ﬂow

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Packetbeat and Docker

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Auditbeat

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Linux Kernel File Integrity

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Heartbeat

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Winlogbeat

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https://github.com/elastic/elasticsearch-docker https://github.com/elastic/kibana-docker https://github.com/elastic/logstash-docker https://github.com/elastic/beats-docker

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--- version: '2' services: kibana: image: docker.elastic.co/kibana/kibana:6.3.0 links: - elasticsearch ports: - 5601:5601 elasticsearch: image: docker.elastic.co/elasticsearch/elasticsearch:6.3.0 volumes: - esdata:/usr/share/elasticsearch/data ports: - 9200:9200 volumes: esdata: driver: local

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Demo https://github.com/xeraa/elastic-docker/ tree/master/full_stack Elasticsearch, Kibana, Filebeat, Heartbeat, Metricbeat, Packetbeat, nginx, MySQL