Add example of a pvcbootstrapd variables file
Also add a README to clarify some details.
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# PVC Ansible `group_vars`
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1. There should always be at least two (2) files here, with an optional third (3rd):
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* `base.yml`: Specifies basic cluster information.
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* `pvc.yml`: Specifies PVC system information.
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* `bootstrap.yml`: Specifies `pvcbootstrapd` deployment information (optional).
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2. The files can be named arbitrarily, but these named are highly recommended. If the names are changed, and you use `pvcbootstrapd`, ensure you set them properly in its configuration.
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These files are self-documented; read the comments carefully.
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---
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# PVC cluster specification for pvcbootstrapd
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#
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# This configuration is entirely optional, and is not required unless you are using pvcbootstrap to
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# deploy the cluster. It must be filled out and committed before connecting any hosts from
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# the new cluster.
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#
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# Bootstrap Host Definitions
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#
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# All hosts to be bootstrapped by the pvcbootstrapd system must be present in this list.
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#
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# NOTE: Only Redfish-capable BMCs can be automatically provisionned by pvcbootstrapd. Non-Redfish
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# BMCs can be used, but they must be pre-configured with a system disk RAID, to boot from network,
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# etc. and the per-host TFTP files must be created manually.
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#
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# Disks Logic
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#
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# There are 3 categories of disks that can be specified for use in the pvcbootstrapd system:
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# * System disk (for the host OS)
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# * Data disks (for VM data, i.e. Ceph OSDs)
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# * Ceph database disk (if applicable, for OSD journaling/database)
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#
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# The first two categories are not optional; at least one system disk and one data disk per
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# coordinator node must be specified for a usable cluster.
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#
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# OSD Database Disks
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#
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# OSD database disks are optional, and only required in some specific situations with some specific
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# guest workloads. Only one (1) device may be specified, and this should usually be an NVMe device
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# with a Linux path (e.g. '/dev/nvme0n1', see format specifications below).
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#
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# The post-bootstrap hooks will use this disk, if present, to create an "osd-db-vg" device within
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# PVC before creating OSDs, and this database VG will then be used for all OSDs on the node.
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#
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# Data Disks
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#
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# At least one (1) data disk must be specified, and these should be fast devices (SATA, SAS, or
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# NVMe SSD); the former two can use any format below, but the latter should use a Linux path.
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#
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# These disk(s) will be used for OSD volumes within PVC, and will be provisioned by the post-
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# bootstrap hooks.
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#
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# System Disks
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#
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# At least one (1) and at most two (2) system disks must be specified, and these can be any
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# devices (SSDs, SD Cards, etc.), though faster system disks will result in a more responsive
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# system.
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#
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# If one system disk is specified, the system will be installed directly onto it.
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#
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# If two system disks are specified, and the controller supports it, a hardware RAID will be
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# created out of the disks for use as the resulting single system disk.
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#
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# PVC does not supports software RAID for node system disks; of the controller does not support
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# Redfish and hardware RAID therein, only the first listed disk will be used.
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#
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# Drive Specification Formats
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#
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# The disks in each group can be specified in one of 3 ways:
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#
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# 1. A full Linux block path beginning with '/dev/'. Any path can be used but, if possible,
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# reliable paths like '/dev/disk/by-path' or '/dev/disk/by-id' are recommended unless there is
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# no chance for ambiguity (e.g. only a single sdX drive is present for the system disk).
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#
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# These direct paths are the most reliable way to specify NVMe disks due to the predicable
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# format of Linux "/dev/nvmeX" drive names.
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#
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# 2. On Redfish-capable hosts only, a chassis disk ID number, usually 0-7 (0-indexed), indicating
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# the position of the disk on the primary storage controller. When specified this way, the
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# system will query the active storage devices from Redfish and then automatically construct
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# a "detect:" string for each one based on its vendor/model, size and ID.
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#
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# Note that on most chassis, the bays are labeled "1-8"; these must be converted by
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# subtracting 1 from them to get 0-indexed IDs. So for example the drive in bay "1" would
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# have the index of 0, and so on.
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#
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# These ID numbers are the most relible way to specify SATA/SAS disks on Redfish-capable
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# nodes and should be preferred for their simplicity there.
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#
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# The pvcbootstrapd setup will use the values provided by Redfish to craft a "detect:" string
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# for the block device (or virtual RAID array, if two devices are specified for the system
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# disk entries).
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#
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# 3. A "detect:" string. This is a specially-formatted string which can be used by the installer
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# to search the output of 'lsscsi' for the given device. A "detect:" string is formatted as
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# such:
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# detect:<Controller-or-Model-Name>:<0-indexed-ID>:<Capacity-in-human-units>
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#
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# For example, to detect the *second* 800GB Intel SSD:
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# detect:INTEL:1:800GB
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# Or to detect a (single) Dell BOSS card's virtual RAID-1 of two 240GB M.2 SSDs:
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# detect:DELLBOSS:0:240GB
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# Or to detect the first RAID-1 volume on a Dell PERC controller of two 200GB SSDs:
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# detect:PERC:0:200GB
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#
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# The controller/vendor name will usually be fully capitalized. This string can contain
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# multiple space-separated elements, though usually only the first word is required, for
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# example "DELLBOSS VD" -> "DELLBOSS" or "PERC H330 Mini" -> "PERC", unless there is
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# potential for ambiguity.
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#
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# The ID is the Nth entry *of multiple identical devices*, and should usually be "0" unless
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# there are multiple identically-sized devices with the same vendor. If there is only a set
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# of identical drives, these will usually match in position to the drive bay because they will
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# be sorted by the PCIe bus identifier, but this does not map 1-to-1 with chassis disk IDs as
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# used by specification format 2, and must always be 0-indexed based on a given vendor+size.
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#
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# The size should be the expected human-readable size of the disk with a suffix attached, for
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# example "800GB", "240GB", "1.92TB", "2TB", etc.. This value will be used to match, within
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# +/-2%, the actual reported sizes of the block devices (which are usually slightly smaller).
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#
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# These "detect:" strings are the most reliable way to determine a SATA/SSD disk or hardware
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# RAID volume independent of Redfish, and should generally be used for these device types on
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# non-Redfish capable systems. NVMe devices can *not* use this format and should always use
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# the predicable '/dev/nvmeX' names instead as mentioned in specification format 1.
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bootstrap:
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# First node
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"d8:d7:d6:d5:d4:d1": # BMC MAC Address (from asset tag, etc.)
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node: # Node information
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hostname: hv1 # The (short) hostname. Must be present in the pvc_nodes list.
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config: # Node configuration (optional)
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kernel_options: # Additional options for the installer kernel command line
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- "console=ttyS1,115200n"
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release: buster # The Debian release to install, OPTIONAL
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mirror: http://ftp.debian.org # The Debian mirror to use, OPTIONAL
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packages: # List of additional packages to install, OPTIONAL
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- ca-certificates
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filesystem: ext4 # The filesystem to use for the system partitions, OPTIONAL
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bmc:
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username: Administrator # BMC/IPMI administrative username
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password: SuperSecret # BMC/IPMI administrative password (initial)
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# NOTE: This is usually the out-of-box password; the actual
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# password will be set later by the Ansible roles.
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redfish: yes # Can system BMC support Redfish?
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bios_settings: # An optional listing of BIOS settings to alter before bootstrap
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BootMode: "Uefi" # NOTE: Must be valid Redfish BIOS options or will be ignored.
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SecureBoot: "Disabled"
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disks: # Disk definitions (see explanations above)
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system: # List of system disk(s)
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- "/dev/disk/by-path/pci-0000:41:00.0-ata-1"
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data: # List of data disks for OSDs
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- "/dev/disk/by-path/pci-0000:01:00.0-sas-phy0-lun-0"
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- "/dev/disk/by-path/pci-0000:01:00.0-sas-phy4-lun-0"
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osd_db: # List of OSD database disk (maximum one)
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- "/dev/nvme0n1"
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# Second node
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"d8:d7:d6:d5:d4:d2":
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node:
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hostname: hv2
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config:
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bmc:
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username: Administrator
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password: SuperSecret
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redfish: yes
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disks:
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system:
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- "detect:DELLBOSS:0:240GB"
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data:
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- "detect:INTEL:0:960GB"
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- "detect:INTEL:1:960GB"
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# Third node
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"d8:d7:d6:d5:d4:d3":
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node:
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hostname: hv3
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config:
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bmc:
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username: Administrator
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password: SuperSecret
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redfish: no
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disks:
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system:
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- "/dev/sda"
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data:
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- "/dev/nvme0n1"
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- "/dev/nvme0n2"
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#
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# Hooks
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#
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# Hooks are sets of tasks (commands, etc.) to be run against the cluster once the bootstrap Ansible run has
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# been completed. These are useful to perform post-Ansible setup tasks, for instance creating storage OSDs and
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# pools, deploying VMs, running hooks, executing webhooks, etc.
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#
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# Each hook can define which host(s) it should be run on or against depending on the handler.
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# There are several fixed, defined hooks which are known to the cluster, while all other hooks must be defined
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# with their full specifications.
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#
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# The hook type can be one of the defined hooks, "pvc", "script", "python", or "webhook".
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# * "pvc" hooks use the PVC CLI on one node to execute the desired command, without the leading "pvc".
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# * "script" hooks are a set of shell commands that will be run in a ROOT shell on the given node(s).
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# * "python" hooks are a set of Python commands that will be run in a ROOT interpreter on the given node(s).
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# * "webhook" hooks send POST events with the specified body to the specified URL from pvcprovisionerd itself.
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#
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# Hooks are always executed in the order they are presented.
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hooks:
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- name: install virtual router
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type: script
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node: hv1
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action: |
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pvc provisioner profile list
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