All existing controller runtime watches are converted to use "typed"
handlers and predicates instead of operating on `client.Object`. The
intent is to be bug for bug equivalent with the existing logic while
replacing run time type assertions and switch statements with compile
time type constraints and type casts. In several cases, functions using
assertions were split up such that each function only handles a single
Kind at a time. It is hoped that this will improve readability and
maintainability while facilitating future refactoring such as migrating
some watches to using IndexFields.
Of particular note is that the massive switch statement in
`WatchControllerPredicate()` from
`pkg/operator/ceph/controller/predicate.go` has been replaced with
generics, reflection, and splitting the obc logic into its own predicate
function. There are still many helper functions operating on
`client.Object`. These were not updated unless required by the compiler
in order to limit the size of this change. The type safety of these
funcs should be improved as followup work.
It is strongly suggested that going forward, handlers and predicates
only handle a single Kind (generic or not) and that switches / type
assertions are heavily discouraged or forbidden. This PR removed all
but a single switch statement in a predicate, which should be addressed
in future work.
Signed-off-by: Joshua Hoblitt <josh@hoblitt.com>
The exporter pods were being counted as a ceph pod,
so once an exporter pod was added to a node, it would never
be removed since the controller thinks the exporter pod
itself is a ceph pod for which the exporter must be present.
Signed-off-by: Travis Nielsen <tnielsen@redhat.com>
The crash collector controller is designed for watching nodes where
ceph daemons are running, and ensuring a special daemon is running
on that node to provide additional support for ceph on that node.
The crash collector is the first example of a daemon that should be
running on all the ceph daemon nodes. The next example of such a
node daemon will be the ceph exporter that will listen for the
ceph metrics as described in the design doc.
https://github.com/rook/rook/blob/master/design/ceph/ceph-exporter.md
Now the crash collector controller is renamed to the node daemon controller
so the ceph exporter daemon can also be managed by the same controller.
Signed-off-by: Travis Nielsen <tnielsen@redhat.com>
Joshua Hoblitt
Travis Nielsen
subhamkrai
parth-gr
Avan Thakkar