The io/ioutil package has been deprecated as of Go 1.16, see
https://golang.org/doc/go1.16#ioutil. This commit replaces the existing
io/ioutil functions with their new definitions in io and os packages.
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
The event monitor handles exit events one by one. If there is something
wrong about deleting task, it will slow down the terminating Pods. In
order to reduce the impact, the exit event watcher should handle exit
event separately. If it failed, the watcher should put it into backoff
queue and retry it.
Signed-off-by: Wei Fu <fuweid89@gmail.com>
