On 28.03.2014 18:09, Talk Jesus wrote:
Thanks Lucian,
Ideally you should have separate and redundant (bonded) links for
management, secondary storage and Internet uplink (public).
Please explain. I'm thinking, a dedicated Cisco switch for the cloud,
plus another for failover. What do you mean by redundant/bonded links
for management?
I think in Cisco-speak that would mean "port channel".
Cloudstack has at least 3 types of networks: management, secondary
storage, internet uplink. Also take into consideration links to primary
network storage if you want it.
The network bits are explained in the documentation. In addition to the
official docs read the following which I have found helpful:
http://shapeblue.com/cloudstack/understanding-cloudstacks-physical-networking-architecture/
http://shankerbalan.net/blog/cloudstack-simple-advanced-network-example/
HA is not possible with local storage
So local storage = drives for vm "storage" on same HV (cpu/memory
box. I'm curious why HA is not possible on a HV using
CPU/Memory/Storage? I've never heard that before for HA.
It looks like we have a language barrier of some sort. :)
The way HA works is ACS will monitor your VMs and HV, if one HV goes
down it will attempt to restart the VMs running on that HV on another
HV, but for this to happen the "new" HV needs to be able to access the
storage those VMs were using and this can only happen if you use shared
storage. Do I make sense?
Lucian
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