Bug 110069 – GCE EWS bots are all offline

• Component: Tools / Tests
• Status: RESOLVED FIXED

[Alan Cutter]

All the GCE bots were terminated over the weekend.
Bots affected:
 - commit-queue
 - cr-linux-ews/chromium-ews
 - cr-linux-debug-ews
 - style-queue
 - feeder-queue
 - sheriffbot

The problem is the image we were using (ubuntu-10-04-v20120621) was obsoleted.
CE recommends using gcel-10-04-v20130104 instead.

The hard coded /dev/vdb no longer exists, we should be using /dev/ephemeral-disk-0 to access the ephemeral disk.

[Alan Cutter]

A partition on /dev/ephemeral-disk-0 is created as /dev/ephemeral-disk-0-part1.
These are soft links to /dev/sdb and /dev/sdb1 respectively.
The soft links are not always created in time for the script to use them and it fails to create a fs or mount it. This happened in 12/15 cases.
With this is mind it is better to use /dev/sdb and /dev/sdb1 directly. If the image changes again in future this will be a thing to lookout for in case it differs again.

Another difference on this image is that /etc/hosts doesn't have general read access thus things are unable to connect to localhost. This breaks the DRT tests.
Will need to "sudo chmod 644 /etc/hosts" as part of the VM build.

[Alan Cutter]

Created attachment 188797 [details]
Patch

[Eric Seidel (no email)]

Comment on attachment 188797 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=188797&action=review

Looks reasonable.

> Tools/EWSTools/build-vm.sh:61
> +sudo chmod 644 /etc/hosts

?!?

[Alan Cutter]

(In reply to comment #3)
> (From update of attachment 188797 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=188797&action=review
> 
> Looks reasonable.
> 
> > Tools/EWSTools/build-vm.sh:61
> > +sudo chmod 644 /etc/hosts
> 
> ?!?

Haha, I too am perplexed that it needed this. It was 640 by default meaning you couldn't ping localhost!

[Eric Seidel (no email)]

Comment on attachment 188797 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=188797&action=review

>>> Tools/EWSTools/build-vm.sh:61
>>> +sudo chmod 644 /etc/hosts
>> 
>> ?!?
> 
> Haha, I too am perplexed that it needed this. It was 640 by default meaning you couldn't ping localhost!

!?  That sounds like a config error in the default image?

I wonder if it warrants a GCE bug.

[WebKit Review Bot]

Comment on attachment 188797 [details]
Patch

Clearing flags on attachment: 188797

Committed r143156: <http://trac.webkit.org/changeset/143156>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.