So it's safe to conclude that HA while enabled on the host(As in the module), must be available cluster wide(uniform cluster). This is how VMware and others operate.
Thanks all. -Kelcey >-----Original Message----- >From: Sateesh Chodapuneedi [mailto:sateesh.chodapune...@citrix.com] >Sent: Wednesday, February 27, 2013 8:46 PM >To: cloudstack-dev@incubator.apache.org >Cc: Hari Kannan >Subject: RE: HA question > >For VMware, CloudStack uses native HA provided by VMware. >VMware provides HA at the level of cluster. > >Regards, >Sateesh > >> -----Original Message----- >> From: Nitin Mehta [mailto:nitin.me...@citrix.com] >> Sent: 28 February 2013 10:13 >> To: cloudstack-dev@incubator.apache.org >> Cc: Hari Kannan >> Subject: Re: HA question >> >> CS has its own HA logic and doesn't use the native HA of the HV and so >> the question for enabling the HA for hosts doesn't arise. This is true for XS. >> For Vmware and KVM, I will let the guru's speak :) >> >> On 28/02/13 9:55 AM, "kdam...@apache.org" <kdam...@apache.org> >wrote: >> >> >Thanks that¹s awesome, but not quite the answer I was looking for. >> > >> >To better phrase my question, if the cluster is the basic unit of >> >availability, when hosts are enabled for HA, must all hosts in the >> >cluster be enabled? Or can the cluster exist with a non-uniform >> >structure, having only some hosts enabled for HA? >> > >> >You partially answered it with the special reserve HA hosts, but I'm >> >looking more in terms of general use. >> > >> >Thanks >> > >> >-kelcey >> > >> > >> >>-----Original Message----- >> >>From: Hari Kannan [mailto:hari.kan...@citrix.com] >> >>Sent: Wednesday, February 27, 2013 8:21 PM >> >>To: cloudstack-dev@incubator.apache.org >> >>Subject: RE: HA question >> >> >> >>Hi Kelsey, >> >> >> >>HA is at 2 levels VMs can be marked HA. In addition, you can mark >> >>some hosts as reserved for ³Dedicated² HA hosts. Quoting from the >> >>manual, the dedicated HA option is set through a special host tag >> >>when the host is created. >> >>To allow the administrator to dedicate hosts to only HA-enabled VMs, >> >>set the global configuration variable ha.tag to the desired tag (for >> >>example, "ha_host"), and restart the Management Server. Enter the >> >>value in the Host Tags field when adding the host(s) that you want >> >>to dedicate to HA-enabled VMs. >> >> >> >>Hari >> >> >> >>From: Kelcey Damage (BT) [mailto:kel...@backbonetechnology.com] >> >>Sent: Wednesday, February 27, 2013 8:00 PM >> >>To: CloudStack dev list >> >>Subject: RE: HA question >> >> >> >>Hi, >> >> >> >>I can¹t remember, do we enable HA on a per host basis, or on a per >> >>cluster basis? >> >> >> >>Thanks. >> >> >> >>[cid:image001.png@01CE1524.FA0D61B0]Kelcey Damage Infrastructure >> >>Systems Architect >> >>>www.backbonetechnology.com<http://www.backbonetechnology.com/> >> >>-------------------------------------------------------------------- >> >>----- >> >>>kel...@backbonetechnology.com<mailto:kel...@backbonetechnology.co >m >> >>> >> >> >> >>address: 55 East 7th Ave, Vancouver, BC, V5T 1M4 >> >>tel: +1 604 713 8560 ext:114 >> >>fax: +1 604 605 0964 >> >>skype: kelcey.damage >> >> >> > >> >
