Uno automates setting up Apache Accumulo or Apache Fluo (and their dependencies) on a single machine.
Uno makes it easy for a developer to experiment with Accumulo or Fluo in a realistic environment. Uno is designed for developers who need to frequently upgrade and test their code, and do not care about preserving data. While Uno makes it easy to setup a dev stack running Fluo or Accumulo, it also makes it easy to clear your data and setup your dev stack again. To avoid inadvertent data loss, Uno should not be used in production.
Checkout Muchos for setting up Accumulo or Fluo on multiple machines.
Requirements
Uno requires the following software to be installed on your machine.
- Java - JDK 11 is required for running Fluo (with Accumulo 2.1).
- wget - Needed for
fetchcommand to download tarballs. - Maven - Only needed if
fetchcommand builds tarball from local repo.
You should also be able to ssh to localhost without a passphrase. The following instructions can help you setup these requirements in your environment :
Quickstart
The following commands will get you up and running with an Accumulo instance if you
have satisfied the requirements mentioned above. Replace accumulo with fluo to
setup a Fluo instance.
git clone https://github.com/apache/fluo-uno.git
cd fluo-uno
./bin/uno fetch accumulo # Fetches binary tarballs of Accumulo and its dependencies
./bin/uno setup accumulo # Sets up Accumulo and its dependencies (Hadoop & ZooKeeper)
source <(./bin/uno env) # Bash-specific command that sets up current shellAccumulo is now ready to use. Verify your installation by checking the Accumulo Monitor and Hadoop NameNode status pages.
Note that the Accumulo shell can be accessed in one of two ways. The easiest is method is to use the uno command.
./bin/uno ashell
You can also access the shell directly. The Accumulo installation is initialized using the username root
and password secret (set in the uno.conf file). Therefore, the shell can be accessed directly using:
accumulo shell -u root -p secret
Starting with Accumulo 2.1, a Jshell session can also be used.
./bin/uno jshell
When you're all done testing out Accumulo you can clean up:
./bin/uno wipe
For a more complete understanding of Uno, please continue reading.
Installation
First, clone the Uno repo on a local disk with enough space to run Hadoop, Accumulo, etc:
git clone https://github.com/apache/fluo-uno.git
The uno command uses conf/uno.conf for its default configuration which should be
sufficient for most users.
Optionally, you can customize this configuration by modifying the uno.conf file for
your environment. Inside this script the variable UNO_HOME defaults to the root of the Uno repository.
vim conf/uno.confIf you would like to avoid modifying uno.conf because it is managed by git,
there is a second way to configure uno. If conf/uno-local.conf exists then
it is used instead of uno.conf. After pulling the latest changes to
Uno, a tool like meld can be used to compare uno.conf and uno-local.conf.
cp conf/uno.conf conf/uno-local.conf
vim conf/uno-local.confAll commands are run using the uno script in bin/. Uno has a command that helps you configure
your shell so that you can run commands from any directory and easily set common environment
variables in your shell for Uno, Hadoop, ZooKeeper, Fluo, and Spark. Run the following command to
print this shell configuration. You can also add --paths or --vars to the command below to limit
output to PATH or environment variable configuration:
uno env
You can either copy and paste this output into your shell or add the following (with a correct path) to your ~/.bashrc automatically configure every new shell.
source <(/path/to/uno/bin/uno env)With uno script set up, you can now use it to download, configure, and run Fluo's dependencies.
Fetch command
The uno fetch <component> command fetches the tarballs of a component and its dependencies for later
use by the setup command. By default, the fetch command downloads tarballs but you can configure it
to build Fluo or Accumulo from a local git repo by setting FLUO_REPO or ACCUMULO_REPO in uno.conf.
Run uno fetch to see a list of possible components.
After the fetch command is run for the first time, it only needs to run again if you want to
upgrade components and need to download/build the latest version.
Setup command
The uno setup command combines uno install and uno run into one command. It will install the
downloaded tarballs to the directory set by $INSTALL in your uno.conf and run you local development
cluster. The command can be run in several different ways:
-
Sets up Apache Accumulo and its dependencies of Hadoop, ZooKeeper. This starts all processes and will wipe Accumulo/Hadoop if this command was run previously.
uno setup accumulo -
Sets up Apache Fluo along with Accumulo (and its dependencies). This command will wipe your cluster. While Fluo is set up, it does not start any Fluo applications.
uno setup fluo -
For Fluo & Accumulo, you can setup the software again without wiping/setting up their underlying dependencies. You can upgrade Accumulo or Fluo by running
uno fetchbefore running this command.uno setup fluo --no-deps uno setup accumulo --no-deps
You can confirm that everything started by checking the monitoring pages below:
If you run some tests and then want a fresh cluster, run the setup command again which will
kill all running processes, clear any data and logs, and restart your cluster.
Plugins
Uno is focused on running Accumulo & Fluo. Optional features and service can be run using plugins.
These plugins can optionally execute after the install or run commands. They are configured by
setting POST_INSTALL_PLUGINS and POST_RUN_PLUGINS in uno.conf.
Post install plugins
These plugins can optionally execute after the install command for Accumulo and Fluo:
accumulo-encryption- Turns on Accumulo encryptioninflux-metrics- Install and run metrics service using InfluxDB & Grafana
Post run plugins
These plugins can optionally execute after the run command for Accumulo and Fluo:
spark- Install Apache Spark and start Spark's History serveraccumulo-proxy- Starts an Accumulo Proxy which enables Accumulo clients in other languages.
Wipe command
The uno wipe command will kill all running processes for your local development cluster and clear
all the data and logs. It does not delete the binary tarballs downloaded by the fetch command
so you can use setup directly again in the future. If you need to reclaim the space used by
the binary tarballs you'll have to manually delete them.
Running Apache Fluo applications
Before running an Apache Fluo application, it is recommended that you configure your shell using
uno env. If this is done, many Fluo example applications (such as Webindex and Phrasecount)
can be run by simply cloning their repo and executing their start scripts (which will use
environment variables set in your shell by uno env).
If you want to create your own Fluo application, you should mimic the scripts of example Fluo applications or follow the instructions starting at the Configure a Fluo application section of the Fluo install instructions. These instructions will guide you through the process of configuring, initializing, and starting your application.
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