Many developers know the unwritten rule: Never deploy on Friday. The reason for this rule is that nobody wants to repair a live system at the weekend.
If you live this rule, it's a very good indicator for three things they are wrong in your software development:
- Your application is not well tested for resilience e.g. with Chaos Engineering tools.
- Your deployment pipeline is not stable enough or you not trust them and your tests.
- Your not familiar with roll-backs or you have no feature toggles.
One of the major goal is to trust your software and the test so that you feel comfortable to deploy on every Fridays.
One of my major project goes online on Friday afternoon, most developers was not in the office, with success.
