From 4faa7f927149a5c4ef7a03523f7bc14523cb9baa Mon Sep 17 00:00:00 2001
From: Stuart Mackie <wsmackie@juniper.net>
Date: Fri, 7 Oct 2016 12:24:58 -0700
Subject: Charms for Contrail 3.1 with Mitaka

Change-Id: Id37f3b9743d1974e31fcd7cd9c54be41bb0c47fb
Signed-off-by: Stuart Mackie <wsmackie@juniper.net>
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 charms/trusty/kafka/README.md | 84 +++++++++++++++++++++++++++++++++++++++++++
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+## Overview
+Apache Kafka is an open-source message broker project developed by the Apache
+Software Foundation written in Scala. The project aims to provide a unified,
+high-throughput, low-latency platform for handling real-time data feeds. Learn
+more at [kafka.apache.org](http://kafka.apache.org/).
+
+
+## Usage
+Kafka requires the Zookeeper distributed coordination service. Deploy and
+relate them as follows:
+
+    juju deploy apache-zookeeper zookeeper
+    juju deploy apache-kafka kafka
+    juju add-relation kafka zookeeper
+
+Once deployed, we can list the zookeeper servers that our kafka brokers
+are connected to. The following will list `<ip>:<port>` information for each
+zookeeper unit in the environment (e.g.: `10.0.3.221:2181`).
+
+    juju action do kafka/0 list-zks
+    juju action fetch <id>  # <-- id from above command
+
+We can create a Kafka topic with:
+
+    juju action do kafka/0 create-topic topic=<topic_name> \
+     partitions=<#> replication=<#>
+    juju action fetch <id>  # <-- id from above command
+
+We can list topics with:
+
+    juju action do kafka/0 list-topics
+    juju action fetch <id>  # <-- id from above command
+
+We can write to a topic with:
+
+    juju action do kafka/0 write-topic topic=<topic_name> data=<data>
+    juju action fetch <id>  # <-- id from above command
+
+We can read from a topic with:
+
+    juju action do kafka/0 read-topic topic=<topic_name> partition=<#>
+    juju action fetch <id>  # <-- id from above command
+
+And finally, we can delete a topic with:
+
+    juju action do kafka/0 delete-topic topic=<topic_name>
+    juju action fetch <id>  # <-- id from above command
+
+## Deploying in Network-Restricted Environments
+This charm can be deployed in environments with limited network access. To
+deploy in this environment, you will need a local mirror to serve the packages
+and resources required by this charm.
+
+### Mirroring Packages
+You can setup a local mirror for apt packages using squid-deb-proxy.
+For instructions on configuring juju to use this, see the
+[Juju Proxy Documentation](https://juju.ubuntu.com/docs/howto-proxies.html).
+
+### Mirroring Resources
+In addition to apt packages, this charm requires a few binary resources
+which are normally hosted on Launchpad. If access to Launchpad is not
+available, the `jujuresources` library makes it easy to create a mirror
+of these resources:
+
+    sudo pip install jujuresources
+    juju-resources fetch --all /path/to/resources.yaml -d /tmp/resources
+    juju-resources serve -d /tmp/resources
+
+This will fetch all of the resources needed by this charm and serve them via a
+simple HTTP server. The output from `juju-resources serve` will give you a
+URL that you can set as the `resources_mirror` config option for this charm.
+Setting this option will cause all resources required by this charm to be
+downloaded from the configured URL.
+
+
+## Contact Information
+- <bigdata-dev@lists.launchpad.net>
+
+
+## Help
+- [Apache Kafka home page](http://kafka.apache.org/)
+- [Apache Kafka issue tracker](https://issues.apache.org/jira/browse/KAFKA)
+- [Juju mailing list](https://lists.ubuntu.com/mailman/listinfo/juju)
+- [Juju community](https://jujucharms.com/community)
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