OpenContrail 4.x components
The tables in this section describe the OpenContrail 4.x services and
their distribution across the OpenStack-based MCP cluster nodes.
The OpenContrail services run as
the analytics, analyticsdb, and controller fat Docker containers
managed by docker-compose with the exception of contrail-vrouter-agent
running on the compute nodes as a non-containerized service.
The config and control services, OpenContrail controller containers
| Service name |
Service description |
|---|
contrail-api |
Exposes a REST-based interface for the OpenContrail API. |
contrail-config-nodemgr |
Collects data of the OpenContrail configuration processes and sends it
to the OpenContrail collector. |
contrail-control |
Communicates with the cluster gateways using BGP and with the
vRouter agents using XMPP as well as redistributes appropriate
networking information. |
contrail-control-nodemgr |
Collects the OpenContrail controller process data and sends
this information to the OpenContrail collector. |
contrail-device-manager |
Manages physical networking devices using netconf or ovsdb.
In multi-node deployments, it works in the active/backup mode. |
contrail-discovery |
Deprecated. Acts as a registry for all OpenContrail services. |
contrail-dns |
Using the contrail-named service, provides the DNS service
to the VMs spawned on different compute nodes. Each vRouter node
connects to two OpenContrail controller containers that run
the contrail-dns process. |
contrail-named |
This is the customized Berkeley Internet Name Domain (BIND) daemon of
OpenContrail that manages DNS zones for the contrail-dns service. |
contrail-schema |
Listens to configuration changes done by a user and generates
corresponding system configuration objects. In multi-node deployments,
it works in the active/backup mode. |
contrail-svc-monitor |
Listens to configuration changes of service-template and
service-instance as well as spawns and monitors virtual machines
for the firewall, analyzer services and so on. In multi-node
deployments, it works in the active/backup mode. |
contrail-webui |
Consists of the webserver and jobserver services. Provides
the OpenContrail web UI. |
ifmap-server |
Deprecated. The contrail-control, contrail-schema,
contrail-svc-monitor services connect to the Interface
for Metadata Access Points (IF-MAP) server using this service
during configuration changes. |
The analytics services, OpenContrail analytics containers
| Service name |
Service description |
|---|
contrail-alarm-gen |
Evaluates and manages the alarms rules. |
contrail-analytics-api |
Provides a REST API to interact with the Cassandra analytics
database. |
contrail-analytics-nodemgr |
Collects all OpenContrail analytics process data and sends
this information to the OpenContrail collector. |
contrail-collector |
Collects and analyzes data from all OpenContrail services. |
contrail-query-engine |
Handles the queries to access data from the Cassandra database. |
contrail-snmp-collector |
Receives the authorization and configuration of the physical routers
from the contrail-config-nodemgr service,
polls the physical routers using the Simple Network Management Protocol
(SNMP) protocol, and uploads the data to the OpenContrail collector. |
contrail-topology |
Reads the SNMP information from the physical router user-visible
entities (UVEs), creates a neighbor list, and writes the neighbor
information to the physical router UVEs. The OpenContrail web UI uses
the neighbor list to display the physical topology. |
The database services, OpenContrail controller and analytics containers
| Service name |
Service description |
|---|
cassandra |
On the OpenContrail network nodes and OpenContrail pods, maintains
the configuration data of the OpenContrail cluster.
On the OpenContrail analytics containers, stores the contrail-collector
service data. |
contrail-database |
Manages the Cassandra database information. |
contrail-database-nodemgr |
Collects data of the contrail-database process and sends it
to the OpenContrail collector. |
kafka |
Handles the messaging bus and generates alarms across the OpenContrail
analytics containers. |
redis |
Stores the physical router UVE storage and serves as a messaging bus
for event notifications. |
zookeeper |
Holds the active/backup status for the contrail-device-manager,
contrail-svc-monitor, and the contrail-schema-transformer
services. This service is also used for mapping of the OpenContrail
resources names to UUIDs. |
The vrouter services, OpenStack compute nodes
| Service name |
Service description |
|---|
contrail-vrouter-agent |
Connects to the OpenContrail controller container and the OpenContrail DNS
system using the Extensible Messaging and Presence Protocol (XMPP). |
contrail-vrouter-nodemgr |
Collects the supervisor vrouter data and sends it
to the OpenContrail collector. |
The OpenContrail plugin services, OpenStack controller nodes
| Service name |
Service description |
|---|
neutron-server |
The Neutron server that includes the OpenContrail plugin. |