Re: [Xen-API] [Squeezd] Disabling some balancing features

[Mike McClurg <mike.mcclurg@xxxxxxxxxx>]

On 23/10/12 14:15, Dave Scott wrote:
> In case it's useful: the most recent versions of xapi (found in XenServer 6.1 
> and should be in XCP 1.6) can run without squeezed. So you can
> 
> service squeezed stop
> 
> and then when you try to start a VM, there won't be any squeezing at all. 
> Your new daemon could do whatever it likes to manage the VM balloon targets 
> independently of xapi.
> 
> Does that help at all?
> 
> Cheers,
> Dave

Hi Dave,

I just tried this on XCP 1.6. I stopped squeezed, and then restarted
xenopsd and xapi (for luck), and then tried a localhost migrate. I got
the error:

The server failed to handle your request, due to an internal error.  The
given message may give details useful for debugging the problem.
message: Xenops_interface.Internal_error("Unix.Unix_error(63,
\"connect\", \"\")")

xensource.log (see below) seems to show xenopsd trying to rebalance
memory, even though there is plenty of memory free. Do you know what's
going on here?

Mike


[xensource.log]
Oct 23 14:26:30 xcp-boston-53341-1 /opt/xensource/libexec/xenopsd:
[debug|xcp-boston-53341-1|7|VM.pool_migrate R:944931f7933c|xenops] VM =
dd2b8958-15aa-1988-c7fa-e7b8c3a
28eb2; domid = 3; set_memory_dynamic_range min = 262144; max = 262144
Oct 23 14:26:30 xcp-boston-53341-1 /opt/xensource/libexec/xenopsd:
[debug|xcp-boston-53341-1|7|VM.pool_migrate R:944931f7933c|xenops]
rebalance_memory
Oct 23 14:26:30 xcp-boston-53341-1 /opt/xensource/libexec/xenopsd:
[debug|xcp-boston-53341-1|7|VM.pool_migrate R:944931f7933c|mscgen]
xenops=>squeezed [label="balance_mem
ory"];
Oct 23 14:26:30 xcp-boston-53341-1 xenopsd: [
info|xcp-boston-53341-1|7|VM.pool_migrate R:944931f7933c|xenops] Caught
Unix.Unix_error(63, "connect", "") executing ["VM_mi
grate", ["dd2b8958-15aa-1988-c7fa-e7b8c3a28eb2", {}, {},
"http:\/\/10.80.238.191\/services\/xenops?session_id=OpaqueRef:7fc22b4d-f70b-25dc-dca3-b834b7eb5e5d"]]:
triggerin
g cleanup actions
Oct 23 14:26:30 xcp-boston-53341-1 xenopsd:
[debug|xcp-boston-53341-1|7|VM.pool_migrate R:944931f7933c|xenops] Task
11 reference VM.pool_migrate R:944931f7933c: ["VM_chec
k_state", "dd2b8958-15aa-1988-c7fa-e7b8c3a28eb2"]
Oct 23 14:26:30 xcp-boston-53341-1 xenopsd:
[debug|xcp-boston-53341-1|7|VM.pool_migrate R:944931f7933c|xenops] VM
dd2b8958-15aa-1988-c7fa-e7b8c3a28eb2 is not requesting a
ny attention
Oct 23 14:26:30 xcp-boston-53341-1 xenopsd:
[debug|xcp-boston-53341-1|7|VM.pool_migrate R:944931f7933c|xenops]
VM_DB.signal dd2b8958-15aa-1988-c7fa-e7b8c3a28eb2
Oct 23 14:26:30 xcp-boston-53341-1 xenopsd:
[debug|xcp-boston-53341-1|7|VM.pool_migrate R:944931f7933c|xenops] Task
11 completed; duration = 0
Oct 23 14:26:30 xcp-boston-53341-1 xenopsd:
[debug|xcp-boston-53341-1|7|VM.pool_migrate R:944931f7933c|xenops] Task
10 failed; exception = ["Internal_error", "Unix.Unix_e
rror(63, \"connect\", \"\")"]
Oct 23 14:26:30 xcp-boston-53341-1 xenopsd:
[debug|xcp-boston-53341-1|7|VM.pool_migrate R:944931f7933c|xenops]
Oct 23 14:26:30 xcp-boston-53341-1 xenopsd:
[debug|xcp-boston-53341-1|7||xenops] TASK.signal 10 = ["Failed",
["Internal_error", "Unix.Unix_error(63, \"connect\", \"\")"]]



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