We can use cloud-init to simplify our setup and get rid of some scripts. For example the following user-data would setup the hostsname, resize rootfs for PV instances, etc: #cloud-config fqdn: xyz.mozilla.org package_update: false resize_rootfs: true manage_etc_hosts: true disable_root: false

with cloud-utils-growpart installed we can also use the following (it's optional, because those are implicit default varlues) to resize rootfs on HVM instances: growpart: mode: auto devices: ['/'] To make it work on centos /etc/cloud/cloud.cfg is needed to be tweaked to add "- growpart" before "- resizefs". It works a bit weird on our current centos version. It needs to reboot to make kernel see the changes. Maybe not a big deal because we would reboot after each job. To make it work we need fresher util-linux with partx which supports --update (and maybe a fresher kernel). FTR, commands to install all we needed: rpm -i http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm yum install -y cloud-init cloud-utils-growpart # add "- growpart" to /etc/cloud/cloud.cfg reboot # emulate first boot reboot # second boot After these I got rootfs on an HVM instance resized. Reboot took ~5mins to resize 250G to 350G.

We have some version conflicts here. Balrog submitter uses an older version of python-requests library and fails to submit using the system wide installed package. bhearsum │ rail: it's a problem with the dnsless slaves =\ bhearsum │ [cltbld@bld-linux64-spot-1009.build.releng.use1.mozilla.com ~]$ rpm -qa | grep requests bhearsum │ python-requests-1.1.0-4.el6.noarch rail │ cloud-init requires that package...

This is done by aws_create_instance.py script