This post will describe different ways of debugging puppet-tripleo changes.
Deploying puppet-tripleo using gerrit patches or source code repositories
In some cases, dependencies should be merged first in order to test newer patches when adding new features to THT. With the following procedure, the user will be able to create the overcloud images using WorkInProgress patches from gerrit code review without having them merged (for CI testing purposes).
If using third party repos included in the overcloud image, like i.e. the puppet-tripleo repository, your changes will not be available by default in the overcloud until you write them in the overcloud image (by default is: overcloud-full.qcow2)
In order to make
quick changes to the overcloud image for testing purposes, you
Export the paths to your submission by following an In-Progress review:
In order to avoid noise on IRC, it is possible to clone puppet-tripleo and apply the changes from your github account. In some cases this is particularly useful as there is no need to update the patchset number.
Remove previously created images from glance and from the user home folder by:
rm -rf /home/stack/overcloud-full.*
glance image-delete overcloud-full
glance image-delete overcloud-full-initrd
glance image-delete overcloud-full-vmlinuz
After this step the images can be recreated by executing:
Debugging puppet-tripleo from overcloud images
For debugging purposes, it is possible to mount the overcloud .qcow2 file:
#Install the libguest tool:
sudo yum install -y libguestfs-tools
#Create a temp folder to mount the overcloud-full image:
#Mount the image:
guestmount -a overcloud-full.qcow2 -i --rw /tmp/overcloud-full
#Check and validate all the changes to your overcloud image, go to /tmp/overcloud-full:
# For example, in this step you can go to /opt/puppet-modules/tripleo,
#Umount the image
sudo umount /tmp/overcloud-full
From the mounted image file it is also possible to run, for testing purposes,
the puppet manifests by using
puppet apply and including your manifests:
sudo puppet apply -v --debug --modulepath=/tmp/overcloud-full/opt/stack/puppet-modules -e "include ::tripleo::services::time::ntp"