The vanilla plugin is a reference implementation which allows users to operate a cluster with Apache Hadoop.
For cluster provisioning prepared images should be used. They already have Apache Hadoop 1.2.1 and Apache Hadoop 2.6.0 installed.
You may build images by yourself using Building Images for Vanilla Plugin or you could download prepared images from http://sahara-files.mirantis.com/images/upstream/kilo/
Keep in mind that if you want to use the Swift Integration feature ( Features Overview), Hadoop 1.2.1 must be patched with an implementation of Swift File System. For more information about patching required by the Swift Integration feature see Swift Integration.
Vanilla plugin requires an image to be tagged in Sahara Image Registry with two tags: ‘vanilla’ and ‘<hadoop version>’ (e.g. ‘1.2.1’).
The default username specified for these images is different for each distribution:
| OS | username |
|---|---|
| Ubuntu 14.04 | ubuntu |
| Fedora 20 | fedora |
| CentOS 6.5 | cloud-user |
Known issue:
When user creates or scales a Hadoop cluster using a Vanilla plugin, the cluster topology requested by user is verified for consistency.
Currently there are the following limitations in cluster topology for Vanilla plugin:
For Vanilla Hadoop version 1.X.X:
- Cluster must contain exactly one namenode
- Cluster can contain at most one jobtracker
- Cluster can contain at most one oozie and this process is also required for EDP
- Cluster can’t contain oozie without jobtracker
- Cluster can’t have tasktracker nodes if it doesn’t have jobtracker
- Cluster can’t have hive node if it doesn’t have jobtracker.
- Cluster can have at most one hive node.
For Vanilla Hadoop version 2.X.X:
- Cluster must contain exactly one namenode
- Cluster can contain at most one resourcemanager
- Cluster can contain at most one historyserver
- Cluster can contain at most one oozie and this process is also required for EDP
- Cluster can’t contain oozie without resourcemanager and without historyserver
- Cluster can’t have nodemanager nodes if it doesn’t have resourcemanager
- Cluster can have at most one hiveserver node.