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https://issues.apache.org/jira/browse/ACCUMULO-4706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16225635#comment-16225635
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ASF GitHub Bot commented on ACCUMULO-4706:
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keith-turner commented on a change in pull request #1: ACCUMULO-4706 Initial
implementation of Accumulo docker image
URL: https://github.com/apache/accumulo-docker/pull/1#discussion_r147813909
##########
File path: README.md
##########
@@ -1 +1,138 @@
-# Accumulo Docker Image
+# Apache Accumulo Docker Image
+
+**This is currently a work in progress that depends on unreleased features of
Accumulo and will not be ready
+for use until after Accumulo 2.0.0 is released.** Sometime after Accumulo
2.0.0 is released this project
+will make its first release. Eventually, this will project will create a
`apache/accumulo` image at DockerHub.
+Until then, you will need to build your own image.
+
+## Obtain the Docker image
+
+To obtain the docker image created by this project, you can either pull it
from DockerHub at
+`apache/accumulo` or build it yourself. To pull the image from DockerHub, run
the command below:
+
+ docker pull apache/accumulo
+
+While it is easier to pull from DockerHub, the image will default to the
software versions below:
+
+| Software | Version |
+|-------------|----------------|
+| [Accumulo] | 2.0.0-SNAPSHOT |
+| [Hadoop] | 2.7.3 |
+| [Zookeeper] | 3.4.9 |
+
+If these versions do not match what is running on your cluster, you should
consider building
+your own image with matching versions. However, Accumulo must be 2.0.0+. Below
are instructions for
+building an image:
+
+1. Clone the Accumulo docker repo
+
+ git clone g...@github.com:apache/accumulo-docker.git
+
+2. Until Accumulo 2.0.0 is released, build a Accumulo tarball distribution and
copy it to the root
+ directory of the repo.
+
+ git clone g...@github.com:apache/accumulo.git
+ cd accumulo/
+ mvn clean package
+ cp assemble/target/accumulo-2.0.0-SNAPSHOT-bin.tar.gz
/path/to/accumulo-docker/
+
+3. Build the default Accumulo docker image using the command below.
+
+ cd /path/to/accumulo-docker
+ docker build -t accumulo .
+
+ Or build the Accumulo docker image with specific versions of Hadoop,
Zookeeper, etc using the command below:
+
+ docker build --build-arg ZOOKEEPER_VERSION=3.4.8 --build-arg
HADOOP_VERSION=2.7.0 -t accumulo .
+
+## Image basics
+
+The entrypoint for the Accumulo docker image is the `accumulo` script. While
the primary use
+case for this image is to start Accumulo processes (i.e tserver, master, etc),
you can run other
+commands in the `accumulo` script to test out the image:
+
+```bash
+# No arguments prints Accumulo command usage
+docker run accumulo
+# Print Accumulo version
+docker run accumulo version
+# Print Accumulo classpath
+docker run accumulo classpath
+```
+
+# Run Accumulo using Docker
+
+Before you can run Accumulo services in Docker, you will need to install
Accumulo, configure `accumulo-site.xml`,
+and initialize your instance with `--upload-accumulo-site`. This will upload
configuration to Zookeeper and limit
+how much configuration needs to be set on the command line.
+
+```bash
+$ accumulo init --upload-accumulo-site
+...
+Uploading properties in accumulo-site.xml to Zookeeper. Properties that cannot
be set in Zookeeper will be skipped:
+Skipped - instance.secret = <hidden>
+Skipped - instance.volumes = hdfs://localhost:8020/accumulo
+Skipped - instance.zookeeper.host = localhost:2181
+Uploaded - table.durability = flush
+Uploaded - tserver.memory.maps.native.enabled = false
+Uploaded - tserver.readahead.concurrent.max = 64
+Uploaded - tserver.server.threads.minimum = 64
+Uploaded - tserver.walog.max.size = 512M
+```
+
+Any configuration that is skipped above will need to be passed in as a command
line option to Accumulo services running
+in Docker containers. These options can be set in an environment variable
which is used in later commands.
+
+```
+export ACCUMULO_CL_OPTS="-o instance.secret=mysecret -o
instance.volumes=hdfs://localhost:8020/accumulo -o
instance.zookeeper.host=localhost:2181"
+```
+
+The Accumulo docker image expects that the HDFS path set by `instance.volumes`
is owned by the `accumulo` user. This
+can be accomplished by running the command below (replace the HDFS path with
yours):
+
+```bash
+hdfs dfs -chown -R accumulo hdfs://localhost:8020/accumulo
+```
+
+## Docker engine
+
+Use the `docker` command to start local docker containers. The commands below
will start a local Accumulo cluster
+with two tablet servers.
+
+```
+docker run -d --network="host" accumulo monitor $ACCUMULO_CL_OPTS
+docker run -d --network="host" accumulo tserver $ACCUMULO_CL_OPTS
+docker run -d --network="host" accumulo tserver $ACCUMULO_CL_OPTS
+docker run -d --network="host" accumulo master $ACCUMULO_CL_OPTS
+docker run -d --network="host" accumulo gc $ACCUMULO_CL_OPTS
+```
+
+## Marathon
+
+Using the Marathon UI, you can start Accumulo services using the following
+JSON configuration template. The template is configured to start an Accumulo
+monitor but it can be modified to start other Accumulo services such as
+`master`, `tserver` and `gc`. For tablet servers, set `instances` to the number
+of tablet servers that you want to run.
+
+```
+{
+ "id": "accumulo-monitor",
+ "cmd": "accumulo monitor -o instance.secret=mysecret -o
instance.volumes=hdfs://localhost:8020/accumulo -o
instance.zookeeper.host=localhost:2181",
+ "cpus": 1,
+ "mem": 512,
Review comment:
That may be worth mentioning in the readme, how the JVM memory settings can
be set and why it matters.
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> Create official Accumulo Docker image
> -------------------------------------
>
> Key: ACCUMULO-4706
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4706
> Project: Accumulo
> Issue Type: New Feature
> Components: scripts, start
> Affects Versions: 2.0.0
> Reporter: Mike Walch
> Assignee: Mike Walch
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> While there are some [Accumulo
> images|https://hub.docker.com/search/?isAutomated=0&isOfficial=0&page=1&pullCount=0&q=accumulo&starCount=0]
> on DockerHub, it looks the majority of the them are designed to run a
> single-node Accumulo instance in a Docker container for development and
> testing.
> It would be great if Accumulo had an official image for running Accumulo
> processes in containers on a production cluster. The image could be be
> published as an official image 'apache/accumulo' to DockerHub.
> In order to make this possible, I think work needs to be done to allow
> configuration to be passed to the Accumulo process in the docker container
> without using configuration files (as passing files to a running container is
> hard in Docker). One way to do this is to add an option called
> {{--upload-accumulo-site}} to 'accumulo init' command which is called outside
> of Docker by the user. This would set properties in accumulo-site.xml as
> system properties in Zookeeper during Accumulo initialization. Accumulo
> processes in Docker containers could be started with minimal configuration by
> updating 'accumulo <service>' commands to have a {{-o key=value}} option to
> override configuration. These changes to Accumulo would enable the following
> commands to start an Accumulo cluster in Docker:
> {noformat}
> accumulo init --upload-accumulo-site
> docker pull apache/accumulo
> docker run apache/accumulo master -o instance.zookeeper.host=zkhost:2181
> docker run apache/accumulo tserver -o instance.zookeeper.host=zkhost:2181
> docker run apache/accumulo monitor -o instance.zookeeper.host=zkhost:2181
> docker run apache/accumulo tracer -o instance.zookeeper.host=zkhost:2181
> {noformat}
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