Instead of registering marker metrics inside of
cmd/alertmanager/main.go, register them in types/types.go, encapsulating
marker specific logic in its module, not in main.go. In addition it
paves the path for removing the usage of the global metric registry in
the future, by taking a local metric registerer.
Signed-off-by: Max Leonard Inden <IndenML@gmail.com>
Move the code for storing and GC'ing alerts from being re-implemented in
several packages to existing in its own package
Signed-off-by: stuart nelson <stuartnelson3@gmail.com>
TestAlertsSubscribePutStarvation tests starvation of `iterator.Close` and
`alerts.Put`. Both `Subscribe` and `Put` use the Alerts.mtx lock. `Subscribe`
needs it to subscribe and more importantly unsubscribe `Alerts.listeners`.
`Put` uses the lock to add additional alerts and iterate the `Alerts.listeners`
map. If the channel of a listener is at its limit, `alerts.Lock` is blocked,
whereby a listener can not unsubscribe as the lock is hold by `alerts.Lock`.
Signed-off-by: Max Leonard Inden <IndenML@gmail.com>
