The inventory must define these hosts to run:

• cluster_machines: Set of hosts in the cluster
• hypervisors: Set of hosts to launch virtual machines
• standalone_machine: To define only the cluster is composed with one host (replace cluster_machines)

Prerequisite

This step is useful only for the installed hosts by a debian installer build with build_debian_iso.

The inventory must define these variables to run the step:

• apply_network_config: Boolean to apply the network configuration

• admin_ip_addr: IP address for SNMP

• cpumachinesnort: Range of allowed CPUs for no RT machines

• cpumachines: Range of allowed CPUs for machines (RT and no RT)

• cpumachinesrt: Range of allowed CPUs for RT machines

• cpuovs: Range of allowed CPUs for OpenVSwitch

• cpusystem: Range of allowed CPUs for the system

• cpuuser: Range of allowed CPUs for the user

• irqmask: Set the IRQBALANCE_BANNED_CPUS environment variable, see irqbalance manual

• logstash_server_ip: IP address for logstash-seapath alias in /etc/hosts

• main_disk: Main disk device to observe his temperature

• workqueuemask: The negation of the irqmask (= ~irqmask)

Network

The inventory must define these variables to run the step:

• br_rstp_priority: TODO Multiple of 4096

• cluster_ip_addr: IP address for team0 interface


• gateway_addr: IP address of a gateway, it doesn't have to work

• ip_addr: IP address to communicate with the host

• network_interface: Network interface to communicate with the host

• ntp_primary_server: Address of a NTP server, it's the first server to requests

• ntp_secondary_server: Address of a NTP server, it's the secondary server to requests

• syslog_server_ip: Address of a SYSLOG server

• team0_0: Network interface to connect to team0 bridge

• team0_1: Other network interface to connect to team0 bridge

Shared storage (via ceph)

The inventory may define these hosts to run the step completely:

• clients: Set of hosts that must be ceph-client. These hosts will access to the storage cluster

• mons: Set of hosts to that must be ceph-mon. These hosts will maintain a map of the state of the cluster
  

• osds: Set of hosts to that must be ceph-osd. These hosts will interact with the logical disk to stock the data

More details in the documentation here.

The inventory must define these variables to run the step:

• ceph_cluster_network: Address block to access to cluster network
• ceph_public_network: Address block to access to public network (ie Internet)

• ceph_osd_disk: Device to stock datas (only for ceph-osd hosts)

• osd_pool_default_min_size: Minimal number of available OSD to ensure cluster success (best: ceil(osd_pool_default_size / 2.0))

• osd_pool_default_size: Number of OSD in the cluster

Ceph provides ansible rules to configure the software, you can read the documentation here.

High availability (via corosync and pacemaker)