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Clustering service for managing homogeneous objects in OpenStack
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README.rst

senlin

Senlin is a clustering service for OpenStack cloud. It creates and operates clusters of homogenous objects exposed by other OpenStack services. The goal is to make orchestration of collections of similar objects easier.

Senlin provides ReSTful APIs to users so that they can associate various policies to a cluster. Sample policies include placement policy, load balancing policy, failover policy, scaling policy, ... and so on.

IRC Channel: #senlin

Install via Devstack

This is the recommended way to install Senlin service. Please refer to devstack/README.rst for detailed instructions.

Note that Senlin client is also installed when following the instructions it the above mentioned document.

Manual Installation

Install Senlin Server

  1. Get Senlin source code from OpenStack git repository
$ cd /opt/stack
$ git clone http://git.openstack.org/stackforge/senlin.git
  1. Install Senlin with required packages
$ cd /opt/stack/senlin
$ sudo pip install -e .

  1. Register Senlin clustering service with keystone.

    This can be done using the setup-service script under tools folder.

$ cd /opt/stack/senlin/tools
$ ./setup-service <HOST IP> <SERVICE_PASSWORD>
  1. Generate configuration file for the Senlin service
$ cd /opt/stack/senlin
$ tools/gen-config
$ sudo mkdir /etc/senlin
$ cp etc/senlin/api-paste.ini /etc/senlin
$ cp etc/senlin/policy.json /etc/senlin
$ cp etc/senlin/senlin.conf.sample

Edit file /etc/senlin/senlin.conf according to your system settings. The most common options to be customized include:

[database]
connection = mysql://senlin:<DB PASSWORD>@127.0.0.1/senlin?charset=utf8

[keystone_authtoken]
auth_uri = http://<HOST>:5000/v3
auth_version = 3
cafile = /opt/stack/data/ca-bundle.pem
identity_uri = http://<HOST>:35357
admin_user = senlin
admin_password = <SENLIN PASSWORD>
admin_tenant_name = service

[oslo_messaging_rabbit]
rabbit_host = <HOST>
rabbit_password = <RABBIT PASSWORD>
  1. Create Senlin Database

Create Senlin database using the senlin-db-recreate script under the tools subdirectory. Before calling the script, you need edit it to customize the password you will use for the senlin user.

$ cd /opt/stack/senlin/tools
$ ./senlin-db-recreate
  1. Start senlin engine and api service.

You may need two consoles for the services each.

$ senlin-engine --config-file /etc/senlin/senlin.conf
$ senlin-api --config-file /etc/senlin/senlin.conf

Install Senlin Client

  1. Get Senlin client code from OpenStack git repository.
$ cd /opt/stack
$ git clone http://git.openstack.org/stackforge/python-senlinclient.git
  1. Install senlin client.
$ cd python-senlinclient
$ python setup.py install

You are ready to begin your journey (aka. adventure) with Senlin, now.