Aggregate cluster - integration tests

[SaadiaELF]

Aggregate cluster and circuit breaking

How does circuit breaking work at the level of the aggregate cluster ?

• Circuit breaking does not apply on the level of the aggregate cluster (only on child clusters)
• The max_retry is the only limit that applies to the aggregate cluster

How to test this behaviour ?
Add circuit breaker on the level of the aggregate cluster :

• Test case 1 (cb other than max_retries) : aggregate limit > child clusters => child clusters cb are on opened state + aggregate cluster cb state does not change (remain closed) (for max_connections , max_requests and pending_requets)
• Test case 2 (cb other than max_retries) : aggregate limit < child clusters => child clusters cb are on closed state + aggregate cluster cb state does not change (remain closed) - for max_connections , max_requests and pending_requets)
• Test case 3 (cb max_retries) : aggregate limit > child clusters => aggregate cluster cb is on closed state + child clusters cb state do not change (remain closed)
• Test case 4 (cb max_retries) : aggregate limit < child clusters => aggregate cluster cb is on opened state + child clusters cb state do not change (remain closed)