124 lines
3.2 KiB
ReStructuredText
124 lines
3.2 KiB
ReStructuredText
Ceph in Kolla
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=============
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Requirements
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------------
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Using Ceph requires at least two physical disks across the OpenStack deployment to operate correctly.
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Preparation and Deployment
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--------------------------
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For the disks used for Ceph, execute the following operations:
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::
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<WARNING ALL DATA ON $DISK will be LOST!>
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parted $DISK -s -- mklabel gpt mkpart KOLLA_CEPH_OSD_BOOTSTRAP 1 -1
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where $DISK == /dev/sdb or something similiar
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The following shows an example of using parted to configure /dev/sdb for usage with Kolla.
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::
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parted /dev/sdb -s -- mklabel gpt mkpart KOLLA_CEPH_OSD_BOOTSTRAP 1 -1
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parted /dev/sdb print
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Model: VMware, VMware Virtual S (scsi)
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Disk /dev/sdb: 10.7GB
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Sector size (logical/physical): 512B/512B
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Partition Table: gpt
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Number Start End Size File system Name Flags
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1 1049kB 10.7GB 10.7GB KOLLA_CEPH_OSD_BOOTSTRAP
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Edit the [storage] group in the inventory which contains the hostname(or IP) of the Ceph-OSD hosts
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which have the above disks. Note: ssh authentication is required for Ceph, even in all-in-one.
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(TODO(CBR09): insert link to bug around this if there is one). The following shows an example
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of two Ceph-OSD hosts which using one disk of the controller node and one disk of compute1.
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::
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file: ansible/inventory/multinode
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...
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[storage]
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controller
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compute1
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...
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For AIO:
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::
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file: ansible/inventory/multinode
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...
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[storage]
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all-in-one
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...
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Enable Ceph in /etc/kolla/globals.yml (Ceph is disabled by default):
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::
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file: /etc/kolla/globals.yml
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....
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enable_ceph: "yes"
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....
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Finally deploy the Ceph-enabled OpenStack:
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::
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tools/kolla-ansible deploy -i ansible/inventory/multinode
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Debugging Ceph
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--------------
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If Ceph is run in an all-in-one deployment or with less than three storage nodes, further
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configuration is required. It is necessary to change the default number of copies for the pool.
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The following example demonstrates how to change the number of copies for the pool:
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If the deployment includes two Ceph-OSD hosts as mentioned above, set the pool to 2.
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::
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docker exec ceph_mon ceph osd pool set rbd size 2 (default only have rdb pool)
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For AIO:
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::
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docker exec ceph_mon ceph osd pool set rbd size 1 (default only have rdb pool)
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If Glance, Nova, and cinder have been deployed, all pools have to be modified.
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An example of modifying the pools:
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::
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for p in images vms volumes backups rbd; do docker exec ceph_mon ceph osd pool set $p size 2; done
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For AIO:
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::
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for p in images vms volumes backups rbd; do docker exec ceph_mon ceph osd pool set $p size 1; done
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After making this change, it is mandatory to restart all Ceph osd containers.
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Check the Ceph status for more diagnostic information. The sample output below
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indicates a healthy cluster:
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::
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docker exec ceph_mon ceph -s
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cluster 5fba2fbc-551d-11e5-a8ce-01ef4c5cf93c
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health HEALTH_OK
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monmap e1: 1 mons at {controller=10.0.0.128:6789/0}
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election epoch 2, quorum 0 controller
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osdmap e18: 2 osds: 2 up, 2 in
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pgmap v27: 64 pgs, 1 pools, 0 bytes data, 0 objects
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68676 kB used, 20390 MB / 20457 MB avail
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64 active+clean
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