Xen Orchestra on Ubuntu 15.10 - Complete installation instructions
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Does XO have "HA" capabilities? Can you run two XO servers in sync?
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@coliver said:
Does XO have "HA" capabilities? Can you run two XO servers in sync?
Calling @olivier
I'm not sure, I don't see why you couldn't have multiple XO servers running at once, but I'm uncertain of what capabilities you'd gain if any.
Other than the ability to test updates on one host first, and then the other. Limiting your downtime.
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@DustinB3403
In that case I guess I'd update the script to not only shut down XO before updating, but also running a backup using that other (I can't recall the name of it) backup solution you were using before XO. Then you'd have a fall back point before you ran the update, and could easily fail back to it in case you have problems after the updates.now you have a whole solution.
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@Dashrender NAUBackup, yes it's a viable solution that works from XenServer.
It could certainly work, but it's at a separate host, not sure how you'd script that....
NAUBackup just runs from crontab (or manually if you run it).
I'd just use XC to snapshot what's there for XO, update and test. If all is good, delete the Snapshot.
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XO is able to back it's self up so that works as well.
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@DustinB3403 said:
@Dashrender NAUBackup, yes it's a viable solution that works from XenServer.
It could certainly work, but it's at a separate host, not sure how you'd script that....
NAUBackup just runs from crontab (or manually if you run it).
I'd just use XC to snapshot what's there for XO, update and test. If all is good, delete the Snapshot.
There has to be a way to script that. Make it all part of your XO update script.
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@coliver said:
Does XO have "HA" capabilities? Can you run two XO servers in sync?
Sure, just RSYNC them between hosts. It's a web app, so you can do it in any way that you do with web apps. You can run multiple in parallel for load balancing or whatever. Think of the Xen machines themselves as the databases and XO as the application.
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@Dashrender said:
@DustinB3403 said:
@Dashrender NAUBackup, yes it's a viable solution that works from XenServer.
It could certainly work, but it's at a separate host, not sure how you'd script that....
NAUBackup just runs from crontab (or manually if you run it).
I'd just use XC to snapshot what's there for XO, update and test. If all is good, delete the Snapshot.
There has to be a way to script that. Make it all part of your XO update script.
Not that I'm not interested. But how?
NAUBackup literally runs on Xen, no VM.
XO runs in a VM.
If you could make outward calls from a VM to the Hypervisor you'd be risking the security of the system as a whole.
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@DustinB3403 said:
Not that I'm not interested. But how?
NAUBackup literally runs on Xen, no VM.
XO runs in a VM.
If you could make outward calls from a VM to the Hypervisor you'd be risking the security of the system as a whole.
How would you call NAUBackup normally?
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@DustinB3403 said:
@Dashrender said:
@DustinB3403 said:
@Dashrender NAUBackup, yes it's a viable solution that works from XenServer.
It could certainly work, but it's at a separate host, not sure how you'd script that....
NAUBackup just runs from crontab (or manually if you run it).
I'd just use XC to snapshot what's there for XO, update and test. If all is good, delete the Snapshot.
There has to be a way to script that. Make it all part of your XO update script.
Not that I'm not interested. But how?
NAUBackup literally runs on Xen, no VM.
XO runs in a VM.
If you could make outward calls from a VM to the Hypervisor you'd be risking the security of the system as a whole.
I definitely understand where you are going with that, but I'm assuming that you could create dedicated accounts for these types of tasks, and those accounts would be able to accomplish these goals through remote triggers.
You can update whole server farms remotely in a secure fashion, no reason you can't do these processes the same.
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Directly from the Hypervisor's crontab job
Or the cli to do it directly.
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@DustinB3403 said:
Directly from the Hypervisor's crontab job
Or the cli to do it directly.
You can get to the CLI from the VM the same as from wherever you are getting to it from.
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@scottalanmiller said:
@DustinB3403 said:
Directly from the Hypervisor's crontab job
Or the cli to do it directly.
You can get to the CLI from the VM the same as from wherever you are getting to it from.
Putty and XC.
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@DustinB3403 said:
@scottalanmiller said:
@DustinB3403 said:
Directly from the Hypervisor's crontab job
Or the cli to do it directly.
You can get to the CLI from the VM the same as from wherever you are getting to it from.
Putty and XC.
So SSH.
The script can use SSH just like Putty can.
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is there any reason that this whole script couldn't be run from the XC server itself? Everything done over SSH, etc?
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@Dashrender do you mean run XO from Xen directly?
Rather than in it's own VM?
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@DustinB3403 said:
@Dashrender do you mean run XO from Xen directly?
Rather than in it's own VM?
No, run the scripts that update XO, and kick off the backup/snap/etc of XO from XC/Xen directly.
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@Dashrender said:
@DustinB3403 said:
@Dashrender do you mean run XO from Xen directly?
Rather than in it's own VM?
No, run the scripts that update XO, and kick off the backup/snap/etc of XO from XC/Xen directly.
But why?
You can run a scheduled backup from within XO to backup your XO VM on any schedule you set. Once that completes run the xo-update.sh script and confirm all is functional.
This would also allow you to take advantage of the Continuous delta capabilities. Rather than having to build a full every time you want to update.
It would be much easier to set a backup to run weekly for just the XO VM, stop the services, run the update, reboot XO VM, and restart the services.
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You could use xo-cli to make the backup or create a snapshot.
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Just so everyone is aware, this installation runs from an Active SSH Connection.
I'm still trying to figure out how to get it to run at boot, without needing an Active Connection.
