openstack-ansible/doc/source/install-guide/configure-ceilometer.rst

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Configuring the Ceilometer service (optional)

The Telemetry module(Ceilometer) performs the following functions:

• Efficiently polls metering data related to OpenStack services.
• Collects event and metering data by monitoring notifications sent from services.
• Publishes collected data to various targets including data stores and message queues.
• Creates alarms when collected data breaks defined rules.

Ceilometer on OSAD requires a monogodb backend to be configured prior to running the ceilometer playbooks. A connection string will then need to be given in the user_variables.yml file(See section Configuring User Data below).

Setting up a Mongodb database for ceilometer

1. Install the MongoDB package:

apt-get install mongodb-server mongodb-clients python-pymongo

2. Edit the /etc/mongodb.conf file and change the bind_ip to the management interface of the node your running this on.

bind_ip = 10.0.0.11

3. Edit the /etc/mongodb.conf file and enable smallfiles

smallfiles = true

4. Restart the mongodb service

service mongodb restart

5. Create the ceilometer database

# mongo --host controller --eval '
db = db.getSiblingDB("ceilometer");
db.addUser({user: "ceilometer",
pwd: "CEILOMETER_DBPASS",
roles: [ "readWrite", "dbAdmin" ]})'

MongoDB shell version: 2.4.x
connecting to: controller:27017/test
{
"user" : "ceilometer",
"pwd" : "72f25aeee7ad4be52437d7cd3fc60f6f",
"roles" : [
"readWrite",
"dbAdmin"
],
"_id" : ObjectId("5489c22270d7fad1ba631dc3")
}

NOTE: The CEILOMETER_DBPASS must match the ceilometer_container_db_password in the /etc/openstack_deploy/user_secrets.yml file. This is how ansible knows how to configure the connection string within the ceilometer configuration files.

Configuring the hosts

Ceilometer can be configured by specifying the metering-compute_hosts and metering-infra_hosts directives in the /etc/openstack_deploy/conf.d/ceilometer.yml file. Below is the example included in the etc/openstack_deploy/conf.d/ceilometer.yml.example file:

# The compute host that the ceilometer compute agent will be running on.
metering-compute_hosts:
  compute1:
    ip: 172.20.236.110

# The infra nodes that the central agents will be running on
metering-infra_hosts:
  infra1:
    ip: 172.20.236.111
  infra2:
    ip: 172.20.236.112
  infra3:
    ip: 172.20.236.113

The metering-compute_hosts houses the ceilometer-agent-compute service. It runs on each compute node and pools for resource utilization statistics. The metering-infra_hosts houses serveral services:

• A central agent (ceilometer-agent-central): Runs on a central management server to poll for resource utilization statistics for resources not tied to instances or compute nodes. Multiple agents can be started to scale service horizontally.
• A notification agent (ceilometer-agent-notification): Runs on a central management server(s) and consumes messages from the message queue(s) to build event and metering data.
• A collector (ceilometer-collector): Runs on central management server(s) and dispatches collected telemetry data to a data store or external consumer without modification.
• An alarm evaluator (ceilometer-alarm-evaluator): Runs on one or more central management servers to determine when alarms fire due to the associated statistic trend crossing a threshold over a sliding time window.
• An alarm notifier (ceilometer-alarm-notifier): Runs on one or more central management servers to allow alarms to be set based on the threshold evaluation for a collection of samples.
• An API server (ceilometer-api): Runs on one or more central management servers to provide data access from the data store.

Configuring the user data

In addtion to adding these hosts in the /etc/openstack_deploy/conf.d/ceilometer.yml file, other configurations must be specified in the /etc/openstack_deploy/user_variable.yml file. These configurations are listed below, along with a description:

The type of database backend ceilometer will use. Currently only mongodb is supported: ceilometer_db_type: mongodb

The IP address of the MonogoDB host: ceilometer_db_ip: localhost

The port of the Mongodb service: ceilometer_db_port: 27017

This configures swift to send notifications to the message bus: swift_ceilometer_enabled: False

This configures heat to send notifications to the message bus: heat_ceilometer_enabled: False

This configures cinder to send notifications to the message bus: cinder_ceilometer_enabled: False

This configures glance to send notifications to the message bus: glance_ceilometer_enabled: False

This configures nova to send notifications to the message bus: nova_ceilometer_enabled: False

Once all of these steps are complete, you are ready to run the os-ceilometer-install.yml playbook! Or, if deploying a new stack, simply run setup-openstack.yml. The ceilometer playbooks will run as part of this playbook.