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README.md

Background

Kubernetes is a portable, extensible, open-source platform for managing containerized workloads and services, that facilitates both declarative configuration and automation. It has a large, rapidly growing ecosystem. Kubernetes services, support, and tools are widely available.

Apache Kylin is a open source, distributed analytical data warehouse for big data. Deploy Kylin on Kubernetes cluster, will reduce cost of maintenance and extension.

Directory Introduction

  • config Please update your configuration file here.
  • template This directory provided two deployment templates, one for quick-start purpose, another for production/distributed deployment.
    1. Quick-start template is for one node deployment with an ALL kylin instance for test or PoC purpose.
    2. Production template is for multi-nodes deployment with a few of job/query kylin instances; and some other service like memcached and filebeat will help to satisfy log collection/query cache/session sharing demand.
  • docker Docker image is the pre-requirement of Kylin on Kubernetes, please check this directory if you need build it yourself. For CDH5.x user, you may consider use a provided image on DockerHub.
  • template/production/example This is a complete example by applying production template in a CDH 5.7 hadoop env with step by step guide.

Note

  1. CuratorScheduler is used as default JobScheduler because it is more flexible.
  2. Spark building require use cluster as deployMode. If you forget it, your spark application will never submitted successfully because Hadoop cluster can not resolve hostname of Pod (Spark Driver).
  3. To modify /etc/hosts in Pod, please check this : https://kubernetes.io/docs/concepts/services-networking/add-entries-to-pod-etc-hosts-with-host-aliases/ .
  4. To build you own kylin-client docker image, please don't forget to download and put following jars into KYLIN_HOME/tomcat/lib to enable tomcat session sharing.
  5. If you have difficulty in configure filebeat, please check this https://www.elastic.co/guide/en/beats/filebeat/current/index.html .
  6. External query cache is enabled by default, if you are interested in detail, you may check http://kylin.apache.org/blog/2019/07/30/detailed-analysis-of-refine-query-cache/ .
  7. All configuration files is separated from Docker image, please use configMap or secret. Compared to configMap, secret is more recommended for security reason.
  8. Some verified kylin-client image will be published to DockerHub, here is the link https://hub.docker.com/r/apachekylin/kylin-client . You may consider contributed your Dockerfile to kylin's repo if you are interested.

Reference