e2e: TestExamples dind-sidecar is consistently failing on main branch (and thus pull-request)

[vdemeester]

Any new pull-request is failing on that test. Something is broken in main.

2025-11-12T04:20:36.5504098Z     --- FAIL: TestExamples/v1/taskruns/dind-sidecar (15.31s)

[vdemeester]

        time="2025-11-12T09:46:17.077470939Z" level=debug msg="sd notification" notified=false state="STOPPING=1"
        failed to start daemon: Error initializing network controller: error obtaining controller instance: failed to create NAT chain DOCKER: iptables failed: iptables -t nat -N DOCKER: iptables v1.8.9 (legacy): can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
        Perhaps iptables or your kernel needs to be upgraded.
         (exit status 3)

Might not be the failure in CI, but this is what I get locally...

[vdemeester]

Ah I think I got it...

2025-11-12T09:41:13.7065577Z         >>> Pod dind-sidecar-k7ssr-pod Container step-client:
2025-11-12T09:41:13.7066287Z         docker: Error response from daemon: client version 1.52 is too new. Maximum supported API version is 1.43
2025-11-12T09:41:13.7066745Z         
2025-11-12T09:41:13.7067051Z         Run 'docker run --help' for more information
2025-11-12T09:41:13.7067328Z