Debian stretch EOL

[bpehling-ptc]

Is this a BUG REPORT or FEATURE REQUEST?:

Uncomment only one, leave it on its own line:

/kind bug

/kind feature

What happened:
Debian stretch reached EOL
What you expected to happen:
Update linux distro to supported version
How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?: