These aren't the logs you're looking for Alicja Kwasniewska, Intel Eric Lemoine, Mirantis Michal Jastrzebski, Intel
Alicja Kwasniewska Eric Lemoine Michal Jastrzebski
Agenda Logging Central Hacking Elk or Kolla in logging Demo Rsyslog Ehk? dockers service
Kolla Docker containers Ansible playbooks
Kolla Deployment Docker tools containers Kollaglue Out of the box Customization configuration ● Production-ready Docker containers and deployment tools for operating OpenStack clouds ● Both out of the box configuration and possibility for complete customization ● Images built in the kollaglue namespace for every tagged release, but you can also build images on your own
Logging in docker containers
Docker logs ● What? Anything that is written out to the container’s standard output/error ● Logging capabilities available in the Docker are exposed as drivers json syslog journald gelf fluentd Default ● How to get path to this file? docker inspect -f "{{.LogPath}}" containerName ● The docker logs command retrieves logs present at the time of execution. NOTE: available only for containers with json-file and journald logging drivers
Hacking rsyslog
Previous solution based on rsyslog ● Hacky ● Shared /dev/log ● Not meant for containers ● New versions of docker breaks ● Syslog doesn’t work well with tracebacks ● Removed in both Liberty and Mitaka
Central logging service advantages “One Ring to rule them all, One Ring to find them...”
Which node? Which container? Where should I look first?
No need to search many places ! → data stored in one location and accessed from single interface
One more second and I will find the right place in one of the 10000+ lines... “Developer looking at production logs after a regression with downtime” oil canvas, circa 1580; source: http://classicprogrammerpaintings.tumblr.com
No need to search for one line in million ! → interface provides filtering options and visual representation of data using graphs and charts
Kolla Central logging service New feature in Mitaka
How it works? Heka Feed data /var/lib/k olla/... Interact Elasticsearch Feed data View Kibana Heka /var/lib/ Search kolla/... a t a d d e e F Heka /var/lib/k olla/...
Heka Unified data processing
Introduction to Heka S tream processing software ● Open source ● Developed by Mozilla ● Used in production (by Mozilla) ● Written in Go ● http://hekad.readthedocs.org
Why Heka? →“Unified Data Processing” One tool for all the data: Ops data/ Business Logging Error reports/ metrics data output tracebacks ● Ops data/metrics ● Business data ● Logging output ● Error reports/tracebacks
Heka Pipeline Plugins at each stage of the pipeline
Heka Highlights Lightweight Flexible Configurable Easily and safely extendable ● Lightweight ● Flexible ● Configurable ● Easily and safely extendable
ELK or EHK?
Logstash vs Heka Why did we choose Heka over Logstash? ● Avoid running a JVM on each node ● Heka is faster and more lightweight* ● Heka is very flexible (plugins defined w/ code) * https://github.com/elemoine/heka-logstash-comparison
→ EHK
Elasticsearch Open-source text search and analytics engine
Introduction to Elasticsearch ● Open source product from Elastic group - https://github. com/elastic/elasticsearch ● Highly-scalable full-text search and analytics engine ● Used by applications with complex search requirements ● Written in Java
Elasticsearch Highlights Highly Available Highly Full-Text Scalable Search Document- RESTful oriented API
Kibana Open-source analytics and visualization platform
Introduction to Kibana ● Open source product from Elastic group - https://github. com/elastic/kibana ● Written mainly in JavaScript, comes with Node.js server app ● Server component has a built-in proxy to Elasticsearch (designed to work with Elasticsearch)
Kibana concepts Interact Search Visualize Analyse View ● Allows to search, view, and interact with data stored in Elasticsearch indices ● Possibility to analyse and visualize data in a variety of charts, tables, and maps
Kibana - authentication Shield From Elastic Nginx HAProxy Group HTTP Basic authentication with ACL Elastic Shield - provides security for entire stack, including Kibana plugin for session support and login screen, but requires a license… Nginx - use it as proxy with simple auth mechanism for Kibana HAProxy - add HTTP Basic authentication with ACL that uses the http_auth criterion and http-request auth rule
Deploy EHK with Kolla
3 easy steps Adapt Build images Deploy Kolla configuration with one with one files and enable command command central logging For details please watch webinar presented by Steven Dake - link provided at the last slide
Demo →
Thank you for your attention Alicja Kwasniewska alicja.kwasniewska@intel.com Eric Lemoine elemoine@mirantis.com Michal Jastrzebski michal.jastrzebski@intel.com Irc: #openstack-kolla Webinar: https://vimeopro.com/midokura/345kl392
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