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https://issues.apache.org/jira/browse/DRILL-7563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17028496#comment-17028496
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Paul Rogers commented on DRILL-7563:
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[~arina], thank your for the link. Yes, from the docs, it appears that the MapR
solution is similar to what is proposed; though it is, of course, part of a
broader MapR ecosystem. Since this ticket describes an open source solution,
the goal would be to provide a solution free of most dependencies and which
leverages other open source solutions such as Helm. That said, would be great
for the MapR folks to provide their learnings and non-proprietary Docker files
to avoid redundant efforts.
Thanks much also for the link to the Drill DockerHub account. Yes, we should
extend that account with the work here. I'll do preliminary work using my own
DockerHub account. Once that work passes code reviews, we can shift to the
official account. BTW: the doc links on the Apache DockerHub page lead to 404
errors.
Of course, if [~volodymyr] or anyone else wants to contribute, all help is
welcome. Let me know which part you want to tackle.
> Docker & Kubernetes Drill server container
> ------------------------------------------
>
> Key: DRILL-7563
> URL: https://issues.apache.org/jira/browse/DRILL-7563
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.17.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Major
>
> Drill provides two Docker containers:
> * [Build Drill from
> sources|https://github.com/apache/drill/blob/master/Dockerfile]
> * [Run Drill in interactive embedded
> mode|https://github.com/apache/drill/blob/master/distribution/Dockerfile]
> User feedback suggests that these are not quite the right solutions to run
> Drill in a K8s (or OpenShift) cluster. In addition, we need a container to
> run a Drill server. This ticket summarizes the tasks involved.
> h4. Container Image
> The container image should:
> * Start with the OpenJDK base image with minimal extra packages.
> * Download and install an official Drill release.
> We may then want to provide two derived images:
> The Drillbit image which:
> * Configures Drill for production and as needed in the following steps.
> * Provides entry points for the Drillbit and for Sqlline
> * Exposes Drill's four ports
> * Accept as parameters things like the ZK host IP(s).
> The Sqlline image, meant to be run in interactive mode (like the current
> embedded image) and which:
> * Accept as parameters the ZK host IP(s).
> h4. Runtime Environment
> Drill has very few dependencies, but it must have a running ZK.
> * Start a [ZK container|https://hub.docker.com/_/zookeeper/].
> * A place to store logs, which can be in the container by default, stored on
> the host file system via a volume mount.
> * Access to a data source, which can be configured via a storage plugin
> stored in ZK.
> * Ensure graceful shutdown integration with the Docker shutdown mechanism.
> h4. Running Drill in Docker
> Users must run at least one Drillbit, and may run more. Users may want to run
> Sqlline.
> * The Drillbit container requires, at a minimum, the IP address of the ZK
> instance(s).
> * The Sqlline container requires only the ZK instances, from which it can
> find the Drillbit.
> Uses will want to customize some parts of Drill: at least memory, perhaps any
> of the other options. Provide a way to pass this information into the
> container to avoid the need to rebuild the container to change configuration.
> h4. Running Drill in K8s
> The containers should be usable in "plain" Docker. Today, however, many
> people use K8s to orchestrate Docker. Thus, the Drillbit (but probably not
> the Sqlline) container should be designed to work with K8s. An example set of
> K8s YAML files should illustrate:
> * Create a host-mount file system to capture Drill logs and query profiles.
> * Optionally write Drill logs to stdout, to be captured by {{fluentd}} or
> similar tools.
> * Pass Drill configuration (both HOCON and envrironment) as config maps.
> * Pass ZK as an environment variable (the value of which would, one presumes,
> come from some kind of service discovery system.)
> The result is that the user should be able to manually tinker with the YAML
> files, then use {{kubeadm}} to launch, monitor and stop Drill. The user sets
> cluster size manually by launching the desired number of Drill pods.
> h4. Helm Chart for Drill
> The next step is to wrap the YAML files in a Helm chart, with parameters
> exposed for the config options noted above.
> h4. Drill Operator for K8s
>
> Full K8s integration will require an operator to manage the Drill cluster.
> K8s operators are often written in Go, though doing so is not necessary.
> Drill already includes Drill-on-YARN which is, essential a "YARN operator."
> Repurpose this code to work with K8s as the target cluster manager rather
> than YARN. Reuse the same operations from DoY: configure, start, resize and
> stop a cluster.
>
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