[Errno 5] input/output error about walinuxagent

[qingfuwang]

hi,
Could you share the vhd you used on Azure ? by using https://azurestorageexplorer.codeplex.com/

To find which vhd the vm is using

create SAS access link for that vhd. And you'd better ensure i can logon to that vm by root account.
Set Provisioning.DeleteRootPassword=n in /etc/waaagent.conf, when do deprovision

[yuezh]

Could you please share the full error message?

[hkropp]

I can't reproduce.

I used VirtualBox to create the VHD and unfortunately that didn't work no matter what I tried. I accoutered this error message a couple of time but I can't reproduce anymore.

The exact error message was just that "[Errno 5] input/output error" When I used verbose output it got printed 4 or 3 times on the screen.

I created my image now with Azure itself. Worked for me! Thanks!

[szarkos]

It seems on virtualbox we see an input/output error when writing to /dev/console. We don't commonly see this error on Hyper-V or Azure.

The devs recently added a try/except in LogToCon() to ensure we don't fail at this point, and since we handle the exception in LogToCon() I believe this error is ignorable. But perhaps we can do a bit more to mask the annoying input/output error message.

[hkropp]

Makes sense. I had the feeling that I could ignore it and did at first.

Any thoughts as of why my VHD wiht VB won't work? I am desperate ...

[szarkos]

It's difficult to say without more info, but one possibility is that you may not have the Hyper-V drivers included with your initramfs. Many Linux installers will only include the required drivers needed for the storage devices that were detected at installation time. Since you installed on Vbox then you may need to add these Hyper-V drivers to your initramfs manually.

For Hyper-V and Azure we need at least hv_vmbus and hv_storvsc in the initramfs so we can detect the storage devices and mount the root file system. In general you can use the following command to rebuild your initramfs and include the required Hyper-V drivers:

 mkinitrd --preload=hv_storvsc --preload=hv_vmbus -v -f initramfs-`uname -r`.img `uname -r`

Also, I presume you followed this guide to prepare your CentOS VHD: http://azure.microsoft.com/en-us/documentation/articles/virtual-machines-linux-create-upload-vhd-centos/. Step #6 in this guide is also particularly important when cloning VMs in virtual environments

[hkropp]

Many thanks in advanced! First hint that is not directly in the docu. Will try it later and report back.