Bare metal components

Bare metal components

The bare metal management solution for Mirantis Container Cloud includes the following components:

Bare metal components

Component

Description

OpenStack Ironic

The back-end bare metal manager in a standalone mode with its auxiliary services that include httpd, dnsmasq, and mariadb.

OpenStack Ironic Inspector

Introspects and discovers the bare metal hosts inventory. Includes OpenStack Ironic Python Agent (IPA) that is used as a provision-time agent for managing bare metal hosts.

Ironic Operator

Monitors changes in the external IP addresses of httpd, ironic, and ironic-inspector and automatically reconciles the configuration for dnsmasq, ironic, baremetal-provider, and baremetal-operator.

Bare Metal Operator

Manages bare metal hosts through the Ironic API. The Container Cloud bare-metal operator implementation is based on the Metal³ project.

cluster-api-provider-baremetal

The plugin for the Kubernetes Cluster API integrated with Container Cloud. Container Cloud uses the Metal³ implementation of cluster-api-provider-baremetal for the Cluster API.

LCM agent

Used for physical and logical storage, physical and logical network, and control over the life cycle of a bare metal machine resources.

Ceph

Distributed shared storage is required by the Container Cloud services to create persistent volumes to store their data.

MetalLB

Load balancer for Kubernetes services on bare metal. 1

NGINX

Load balancer for external access to the Kubernetes API endpoint.

Keepalived

Monitoring service that ensures availability of the virtual IP for the external load balancer endpoint (NGINX). 1

IPAM

IP address management services provide consistent IP address space to the machines in bare metal clusters. See details in IP Address Management.

1(1,2)

For details, see Built-in load balancing.

The diagram below summarizes the following components and resource kinds:

  • Metal³-based bare metal management in Container Cloud (white)

  • Internal APIs (yellow)

  • External dependency components (blue)

../_images/bm-component-stack.png