Provisionning a teuthology target with a given kernel

When a teuthology target (i.e. machine) is provisioned with teuthology-lock for the purpose of testing Ceph, there is no way to choose the kernel. But it can be installed afterwards using the following:

cat > kernel.yaml <<EOF interactive-on-error: true roles:

• • mon.a
  • client.0 kernel: branch: testing tasks:
• interactive: EOF

Assuming the target on which the new kernel is to be installed is vpm083, running

$ teuthology --owner loic@dachary.org \ kernel.yaml <(teuthology-lock --list-targets vpm083) ... 2015-03-09 17:47 INFO:teuthology.task.internal:Starting timer... 2015-03-09 17:47 INFO:teuthology.run_tasks:Running task interactive... Ceph test interactive mode, use ctx to interact with the cluster

will install an alternate kernel and reboot the machine:

[ubuntu@vpm083 ~]$ uname -a Linux vpm083 3.19.0-ceph-00029-gaf5b96e #1 SMP Thu Mar 5 01:04:25 GNU/Linux [ubuntu@vpm083 ~]$ lsb_release -a LSB Version: :base-4.0-amd64:base-4.0-noarch: Distributor ID: RedHatEnterpriseServer Description: release 6.5 (Santiago) Release: 6.5 Codename: Santiago

Command line arguments to the kernel may be added to /boot/grub/grub.conf. For instance loop.max_part=16 to allow partition creation on /dev/loop devices:

default=0 timeout=5 splashimage=(hd0,0)/boot/grub/splash.xpm.gz hiddenmenu title rhel-6.5-cloudinit (3.19.0-ceph-00029-gaf5b96e) root (hd0,0) kernel /boot/vmlinuz-3.19.0 ro root=LABEL=79d3d2d4 loop.max_part=16 initrd /boot/initramfs-3.19.0.img