11:34 a.m.
NOTICE: THIS FEATURE IS STILL UNDER DISCUSSION/AGREEMENT/DEVELOPMENT
This patch set implements the basic functions in order to create a SCSI
storagepool based in fibre channel protocol.
--- What is implemented? ---
* backend API
It is possible to create a pool with curl POST request like:
curl -X POST -u <USER> -H 'Content-type: application/json' \
-H 'Accept: application/json' http://localhost:8000/storagepools \
--data '{ \
"name": "testFC", \
"source": { "adapter_type": "scsi_host", \
"adapter_name": "scsi_hostX", \
"wwnn":"112233789", \
"wwpn":"44332211" }, \
"path": "/dev/disk/by-id", \
"type": "scsi" }'
* json schema updated
* created a function to test the host libvirt version
SCSI FC pool and volumes have theirself configuration only after
libvirt version 1.0.5. If lesser, I must use older configuration
tags
* updates the VM guest template with proper disk xml
Create volumes in a SCSI pool is not supported by libvirt, because
volumes are the LUNS preconfigured and available in the SAN. Disk
will have the biggest LUN found assigned.
--- What does need to be discussed? Ideas? ---
1) Backend expects right information from UI, so UI would have to ask
and send 'adapter_name', 'wwnn' and 'wwpn' (other fields can be
fi
xed). However, the UI coud show the FC_Hosts available and let user
select which one he wants. This would require to implement more ba
ck-end functions to gather FC_host info, automatically (name, wwnn,
wwpn).
So, at this moment, just create an UI with input fields or facili
tate the users life ?
2) Currently the user have no choice on with LUN to assign to a guest.
LUN is selected automatically and if not LUN is available, guest
will not have any disk. In order to improve this, the guest creation
fase could have one more step, if the pool in the template in SCSI
type. If SCSI, user could choose which LUN he wants to assign to VM.
Notice that the disk size in the template have been, and will be, ig
nored.
What do you guys think about this approach ?
3) LUNs refresh: Once the storage admin creates more LUNs, the host admin
needs to perform some commands in order to kernel 'see' and map new
devices. I am implementing this backend functionality. A refresh bu
tton will be necessary in the UI, where could it be placed?
- In the storagepool creation window ? When select SCSI type
- In the window to select the LUN, when creating new guest (if
approved this extra step)
- In the storagepool tab, in the pool section, if its a SCSI type
- Also, when the user expands a SCSI pool section, which will show
the volumes (LUNs), this function can be triggered.
4) More ideas/concerns/suggestions ?
Rodrigo Trujillo (3):
Storagepool: SCSI/Fibre Channel backend implementation
Storagepools: Function to check libvirt version
Storagepools: Assign SCSI fibre channel LUN as disk to a new guest
docs/API.md | 6 ++++
src/kimchi/API.json | 18 ++++++++++-
src/kimchi/model.py | 79 +++++++++++++++++++++++++++++++++++++++++++++---
src/kimchi/utils.py | 14 +++++++++
src/kimchi/vmtemplate.py | 40 +++++++++++++++++++++++-
5 files changed, 151 insertions(+), 6 deletions(-)
--
1.8.1.4