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Diffstat (limited to 'docs/installationprocedure/architecture.rst')
| -rw-r--r-- | docs/installationprocedure/architecture.rst | 87 |
1 files changed, 73 insertions, 14 deletions
diff --git a/docs/installationprocedure/architecture.rst b/docs/installationprocedure/architecture.rst index c63da27c..c2b38d00 100644 --- a/docs/installationprocedure/architecture.rst +++ b/docs/installationprocedure/architecture.rst @@ -23,6 +23,64 @@ The overcloud is OPNFV. Configuration will be passed into undercloud and the undercloud will use OpenStack's orchestration component, named Heat, to execute a deployment that will provision the target OPNFV nodes. +Apex High Availability Architecture +=================================== + +Undercloud +---------- + +The undercloud is not Highly Available. End users do not depend on the +underloud. It is only for management purposes. + +Overcloud +--------- + +Apex will deploy three control nodes in an HA deployment. Each of these nodes +will run the following services: + +- Stateless OpenStack services +- MariaDB / Galera +- RabbitMQ +- OpenDaylight +- HA Proxy +- Pacemaker & VIPs + +Stateless OpenStack services + All running statesless OpenStack services are load balanced by HA Proxy. + Pacemaker monitors the services and ensures that they are running. + +Stateful OpenStack services + All running stateful OpenStack services are load balanced by HA Proxy. + They are monitored by pacemaker in an active/passive failover configuration. + +MariaDB / Galera + The MariaDB database is replicated across the control nodes using Galera. + Pacemaker is responsible for a proper start up of the Galera cluster. HA + Proxy provides and active/passive failover methodology to connections to the + database. + +RabbitMQ + The message bus is managed by Pacemaker to ensure proper start up and + establishment of clustering across cluster members. + +OpenDaylight + OpenDaylight is currently installed on all three control nodes but only + started on the first control node. OpenDaylight's HA capabilities are not yet + mature enough to be enabled. + +HA Proxy + HA Proxy is monitored by Pacemaker to ensure it is running across all nodes + and available to balance connections. + +Pacemaker & VIPs + Pacemaker has relationships and restraints setup to ensure proper service + start up order and Virtual IPs associated with specific services are running + on the proper host. + +VM Migration is configured and VMs can be evacuated as needed or as invoked +by tools such as heat as part of a monitored stack deployment in the overcloud. + + OPNFV Scenario Architecture =========================== @@ -47,31 +105,32 @@ the installer as a (-d) deploy setting. Read further in the Apex documentation to learn more about invoking the deploy command. Below is quick reference matrix for OPNFV scenarios supported in Apex. Please refer to the respective OPNFV Docs documentation for each scenario in order to see a full scenario -description. The following scenarios correspond to a supported <Scenario>.yaml -deploy settings file: +description. Also, please refer to release-notes for information about known +issues per scenario. The following scenarios correspond to a supported +<Scenario>.yaml deploy settings file: +-------------------------+------------+-----------------+ -| **Scenario** | **Owner** | **Known Issues**| +| **Scenario** | **Owner** | **Supported** | +-------------------------+------------+-----------------+ -| os-nosdn-nofeature-ha | Apex | | +| os-nosdn-nofeature-ha | Apex | Yes | +-------------------------+------------+-----------------+ -| os-nosdn-nofeature-noha | Apex | | +| os-nosdn-nofeature-noha | Apex | Yes | +-------------------------+------------+-----------------+ -| os-nosdn-ovs-noha | OVS for NFV| | +| os-nosdn-ovs-noha | OVS for NFV| Yes | +-------------------------+------------+-----------------+ -| os-nosdn-fdio-noha | FDS | | +| os-nosdn-fdio-noha | FDS | Yes | +-------------------------+------------+-----------------+ -| os-odl_l2-nofeature-ha | Apex | | +| os-odl_l2-nofeature-ha | Apex | Yes | +-------------------------+------------+-----------------+ -| os-odl_l3-nofeature-ha | Apex | APEX-112 | +| os-odl_l3-nofeature-ha | Apex | Yes | +-------------------------+------------+-----------------+ -| os-odl_l2-sfc-noha | SFC | | +| os-odl_l2-sfc-noha | SFC | Yes | +-------------------------+------------+-----------------+ -| os-odl_l2-bgpvpn-noha | SDNVPN | | +| os-odl_l2-bgpvpn-ha | SDNVPN | No | +-------------------------+------------+-----------------+ -| os-odl_l2-fdio-noha | FDS | | +| os-odl_l2-fdio-noha | FDS | Yes | +-------------------------+------------+-----------------+ -| os-onos-nofeature-ha | ONOSFW | | +| os-onos-nofeature-ha | ONOSFW | Yes | +-------------------------+------------+-----------------+ -| os-onos-sfc-ha | ONOSFW | | +| os-onos-sfc-ha | ONOSFW | Yes | +-------------------------+------------+-----------------+ |