[demo] Create dynamic rollout

[palladius]

Rob Edward wrote: To round out the narrative we use when it comes to progressive rollout and SLI/SLO (well error budget) monitoring adding visibility in Ops Suite to support and monitor the rollout etc. Although it sounds like Cloud Deploy will expose something like this in a few months.

My idea:

• can do that, just need to abstract the YAML in script 15 with 22/78% into a separate parametric yaml (maybe under templates/ )?
• Once done, I could do a 17.sh script which does some timing like:

sleep 1
cat template | sed s/MYPERCENTAGE/10/g | kubectl apply
sleep 5
cat template | sed s/MYPERCENTAGE/50/g | kubectl apply
sleep 5
cat template | sed s/MYPERCENTAGE/90/g | kubectl apply
sleep 5
cat template | sed s/MYPERCENTAGE/100/g | kubectl apply

just an idea..