Web Hosting Talk : Web Hosting Main Forums : Hosting Security and Technology : Problem Starting Container: ioprio

[TheHostHouse]

Hi all,

I'm having problems starting containers on a test node, I keep getting the following error and the VPS doesn't boot up:

Warning: ioprio feature is not supported by kernel. skipped ioprio configure
Container start failed

So clearly I don't have ioprio setup in the kernel, but I have no idea how to go about putting it into the kernel. The kernel I'm currently using is a custom compiled from source one, as the defaut wouldn't work (using an OVH server).

Any help would be much appreciated!

Oh and I'm using SolusVM if that helps =)

[Soluslabs]

Whats the output of uname -a ?

Is it the custom burstnet vz kernel ? as i recall it does not support ioprio.

Use the generic OpenVZ kernel for CentOS 5.

[madaboutlinux]

Do a 'strace' while starting the vps, it should give you an idea where exactly the problem is

strace vzctl start veid

And yes, what is the output of

uname -a

[TheHostHouse]

Originally Posted by Soluslabs

Is it the custom burstnet vz kernel ? as i recall it does not support ioprio.

No, it's one that I compiled from source using the OpenVZ instructions and the OVH config file.

Originally Posted by Soluslabs

Use the generic OpenVZ kernel for CentOS 5.

I tried that but it doesn't seem to work on the OVH server.

Do a 'strace' while starting the vps, it should give you an idea where exactly the problem is

Here's the bit with the error:

write(3, "2010-08-16T16:01:45+0200 vzctl :"..., 58) = 58
syscall_499(0x65, 0x4, 0xffffffffffffffff, 0xffffffff, 0xffffffff, 0x5090d0, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028, 0x509028) = 0
ioctl(4, 0x40102e0d, 0x7fff31437560)    = 0
ioprio_set(0x3e8, 0x65, 0x4004)         = -1 EINVAL (Invalid argument)
write(2, "Warning: ioprio feature is not s"..., 76Warning: ioprio feature is not supported by kernel. skipped ioprio configure) = 76
write(2, "\n", 1
)                       = 1

And uname -a

Linux ((HOSTNAME REMOVED)) 2.6.32.15-openvz-thh-64 #1 SMP Mon Aug 16 14:41:31 CEST 2010 x86_64 x86_64 x86_64 GNU/Linux

[bitdot]

You can try to install the latest kernel and vzctl.

I/O prio is supported since kernel 2.6.18-028stable021.

[TheHostHouse]

Originally Posted by bitdot

You can try to install the latest kernel and vzctl.

I/O prio is supported since kernel 2.6.18-028stable021.

Well I'm running 2.6.32.15 so it should be in there already. I've got the latest version of vzctl as well.

[bitdot]

Strange

What says: vzctl set [insert-vpsid]--ioprio 0 --save

[TheHostHouse]

[root@server ~]# vzctl set 101 --ioprio 0 --save
Saved parameters for CT 101

[root@server ~]# vzctl start 101
Starting container ...
Container is mounted
Adding IP address(es): REMOVED
Setting CPU limit: 400
Setting CPU units: 1000
Setting CPUs: 4
Warning: ioprio feature is not supported by kernel. skipped ioprio configure
Container start failed
Stopping container ...
Container was stopped
Container is unmounted