Reminds me of RancherOS that also have Docker running as PID 1: <a href="https:&#x2F;&#x2F;github.com&#x2F;rancher&#x2F;os#how-this-works" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;rancher&#x2F;os#how-this-works</a>