This is a good effort. I do have some concerns about it.
A true root cause would go deeper and ask why is it that an engineer could solely decide to roll out to all slices ?
The surface-level answer is that Azure platform lacked tooling. Is that the cause or an effect ? I think it is an effect. There are deeper root causes.
Let's ask -- why was it that the design allowed one engineer to effectively bring down Azure ?
We often stop at these RCAs when it gets uncomfortable and it starts to point upwards.
I say this to the engineer who pressed the buttons: Bravo! You did something that exposed a massive hole in Azure which may have very well prevented a much bigger embarrassment.
A true root cause would go deeper and ask why is it that an engineer could solely decide to roll out to all slices ?
The surface-level answer is that Azure platform lacked tooling. Is that the cause or an effect ? I think it is an effect. There are deeper root causes.
Let's ask -- why was it that the design allowed one engineer to effectively bring down Azure ?
We often stop at these RCAs when it gets uncomfortable and it starts to point upwards.
I say this to the engineer who pressed the buttons: Bravo! You did something that exposed a massive hole in Azure which may have very well prevented a much bigger embarrassment.