Kazunori INOUE

Support starting and stopping corosync-notifyd

2

This patch allows corosync-notifyd to be started with ```pcs cluster start```. Addressed issues pointed out at https://github.com/ClusterLabs/pcs/pull/296#issuecomment-858555922.

This patch makes it easy to specify the role in location constraints. ``` # pcs constraint location -h Usage: pcs constraint [constraints]... location [] prefers [=] [[=]]... location [] avoids...

storage_mon: Use the O_DIRECT flag in open() to eliminate cache effects

4

Use of O_DIRECT in open() eliminates the possibility of false negatives resulting from buffer cache reads. please refer to https://lists.clusterlabs.org/pipermail/users/2022-August/030459.html for background.

storage-mon: storage_mon updates attribute, waits for child to finish

5

This patch is intended to avoid the issue (https://github.com/ClusterLabs/resource-agents/issues/1809) of an increasing number of child processes that do not finish.

storage_mon: child processes remain when stuck in read() etc

1

When an I/O unresponsive failure occurs, the child process of storage_mon remains. ``` # ./storage_mon --device /dev/mapper/mpathc --score 1 --verbose Testing device /dev/mapper/mpathc /dev/mapper/mpathc: opened with O_DIRECT, size=536870912000 /dev/mapper/mpathc: reading...