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Re: [Xen-API] FT for XCP
Hello Mike,
Thank you for suggestion. I would love to incorporate remus in xapi if thats possible.
Remus as its inbuilt logic of detecting checkpoint failure and taking decisions accordingly.
I think there is remus support for xen 3.4
What do you suggest as my next step ?
Regards,
Rushikesh
On Mon, Sep 26, 2011 at 12:38 PM, Mike McClurg <mike.mcclurg@xxxxxxxxxx> wrote:
On 09/25/2011 09:11 PM, R J wrote:
Hello List,
I have a proposal and wont mind to implement my self but need a
helping hand to start on.
I want to implement the aggressive FT feature in XCP. The best way
I could imagine is the use of feature *Live Migration*
Steps
1. Enable the FT of a particular VM using xe commands and adding
as a param to that VM e.g. xe vm-param-set FT=true uuid=XYZ
2. If the FT = true detected by xenstore then xapi will initiate a
live migrate of that VM to any of available host.
3. A parallel "network ping"/"xapi heartbit" from/to that host
could be initialized for each FT VM.
4. Live migrate will run forever until its disabled by FT = false
or one of the host is down. e.g. the process will loop at 99.99%
migration state
5. If there is a packet drop of x packets the VM Migrate procedure
will mark the VM Migration as Complete and will switch the devices
forcefully.
-- this could result in some data loss but I dont have any
alternative to this.
-- The specific x packets can be set by XCP but we cant rely for
default XCP Errors
6. If there is a successful migration due to host down then we
will again start from step2
Above steps I have assumed to my knowledge, we can discuss the
problems in it.
Apologies if I'm being too naive.
Regards,
Rushikesh
Mike
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