Hi Adrian, Thanks for reply and hints.Will keep that in mind. But as of now I am more keen on upgrading storage BOX OS and absolutely ok with downtime. (aka management is not ready to spend anything on additional hardware/infra :D)
Makrand -- Best, Makrand On Fri, May 13, 2016 at 6:26 PM, Adrian Sender <[email protected]> wrote: > Hi Makrand, > > There are many different ways to achieve storage migration; I would > probably > add the new LUN and within cloudstack perform a storage migration on the > instances (there would potentially be no outage). > > For the NFS you could rsync preserving the directory structure, update the > database and rebuild SSVM. > > There was an article for secondary storage migration but it seems to have > vanished from the Citrix website; maybe someone from Accelerite knows > where it > is now - http://support.citrix.com/article/CTX135229 > > - Adrian Sender > > ---------- Original Message ----------- > From: Makrand <[email protected]> > To: [email protected] > Sent: Fri, 13 May 2016 12:28:28 +0530 > Subject: Upgrade of Primary storage. > > > Guys, > > > > Need little help. So in my second week on new job, I am suppose to > upgrade > > Nexeta (Primary storage and secondary storage for cloud) OS. > > > > Overview of setup:- > > > > 1Zone>>1POD>>1 Cluster>>8 Hosts > > > > Hypervisor:- Citrix Xenserer 6.5 (Free edition) > > > > Storage Primary (Cluster Level):- On nexenta > > > > Secondary Storage:- On same nexenta BOX (which caters primary) > > > > Management Node is VM (Ubuntu 12004 LTS) whos root disk resides > > again on primary storage coming from same nexenta BOX. Seems LUN is > > different. This VM is running on Management cluster (2 XEN 6.5 hosts). > > > > Well not sure why and how they kept single storage BOX for all > > primary and secondary. Pretty wiered. It was done by a Vendor or > > someone long back. Thats whole different story. > > > > Any-who, coming to point of this email. I've chalked out plan like below. > > ------------------------------------------------------ > > A) Shutdown all VMs in following order:- First user VMs, then VRs & then > > System VMs. > > > > B) Put all XEN hosts in MM (Maintenance mode) from cloudstack. > > > > 1) Verify that all hosts are down (Shutdown them one by one) from > > XEN Center > > > > C) ssh into Management Server VM. Backup cloudstack DB save it on > JumpBOX > > (Use WinSCP) > > > > D) Shutdown Cloudstack Management Server VM and other VMs on management > > cluster. This needs to be done by issuing 'shutdown' command from OS > > level. > > > > E) Shutdown Management cluster XEN hosts. > > > > F) Upgrade the storage. (Reboot is needed at end.......hence so many > > shutdowns) > > > > G) Once upgrade is done start the Machines (Physical and Virtual) in > > reveres order than that of shutdown. (Step E to A above) Something like > > below > > > > 1) Management clsuter XEN hosts > > 2) Cloudstack management server VM and other management cluster VMs > > 3) XEN Hypervisor Nodes under cloud. > > 4) Take XEN hosts out of MM from cloudstack admin GUI. > > 5) Start SSVM and console proxy VM (I guess this time cloudstack > > will recreate CPVM and SSVM if we start first user VM.....not > > sure if this step will be needed) 6) Customer VMs and corresponding VRs > > > > H) Verify from and try to deploy test VM. > > ------------------------------------------------------ > > > > All this downtime is ok. Do you think I am missing anything. Any comments > > on improvising? Should I expect some more glitches? What was your > previous > > experience with primary storage upgrade. > > > > Note:- > > Last time same upgrade happened for one of similar zone and there > > was issue of mapping primary storage LUNs with XEN hosts. Restart of > > hosts did trick that time and hence my manager wants to shutdown all > > physical hosts this time (Since all VMs have their disks on this > > storage box...which will reboot once or twice during upgrade) > > > > BTW > > > > 1) Is it necessary to put XEN hosts in MM from cloudstack? (If I am > > shutting down all VMs). > > > > 2) After I bring UP Management server in step G-1, will it still > > have host in MM? or What would it try to do after its up? (Assuming > > all hosts in cluster are down at that time. > > > > Thanks for reading. > > > > -- > > Best, > > Makrand > ------- End of Original Message ------- > >
