Gabriel Sosa's questions

We are implementing DRDB + heartbeat with two servers to have a file system with failover. These servers exposes a NFS service for other servers

Currently DRDB is working just fine, but when testing we switch from one server to another the mounted folders trough NFS in the other servers just hangs.

Is there any transparent way to make this failover? Make it transparent to NFS or we need to necessary re-mount those nfs-mounted folders?

In any default installation, Apache 2 comes with keepAlive off, but looking at another server, the keepAlive module was turned on.

So, how do I know if keepAlive is right for me? Where can I find some good examples about configure this?

I've been using check_disk without problems until yesterday to check the free space in some partitions. Now we just added a NAS service from our hosting and I could mount it without problems, and, since we have a fixed amount of space, I would like to check the free space with Nagios for not being overcharged.

The problem is sometimes when check_disk goes to check then I get "unknown" status since of course autofs don't maintain the partition mounted 100% of the time. (Nagios-users) check_disk and autofs recommends making a wrapper for the plugin, but I don't feel comfortable with that.

Any idea about a better solution?

Edit:

Well, I found a solution for this:

1. I've compiled and installed the check_file plugin.
2. Created a file on the NAS root: .nagioscheck.
3. Configured Nagios to check often if this file exists, rather than check the space.

So I can check if the NAS is mounted and the free space.

SERVICE STATUS: OK file or directory /mnt/backup/.nagioscheck exists