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Monitoring character device on FreeBSD
From: |
Peter Klett |
Subject: |
Monitoring character device on FreeBSD |
Date: |
Wed, 20 Jul 2005 19:46:57 +0200 |
User-agent: |
Mozilla Thunderbird 1.0 (Windows/20041206) |
Hi list,
this is my first post, so if I'm doing something wrong, please correct me.
I'm having troubles to get monit (last version, compiled from source,
fetched from homepage) working on my FreeBSB 5.4 box
First I encounter sporadically errors when checking for https-websites:
monit: new_ssl_connection(): Openssl engine error: error:140A90A1:SSL
routines:func(169):reason(161)
monit: new_ssl_connection(): Cannot initialize SSL server certificate
handler!
After some digging I found out that this means "library has no ciphers"
in function SSL_CTX_new
Anyway what me really troubles is, that I can't monitor character
devices. I'm using some (g)vinum disks to enforce some kind of quota.
My config looks like this:
check device athos_disk with path /dev/gvinum/vhost_small
start program = "/sbin/mount /data/jails/vhost_small"
stop program = "/sbin/umount /data/jails/vhost_small"
if failed permission 640 then unmonitor
if failed uid root then unmonitor
if failed gid operator then unmonitor
if space usage > 80% then alert
if space usage > 99% then stop
if inode usage > 80% then alert
if inode usage > 99% then stop
group athos
/dev/gvinum/vhost_small looks like this:
# ls -la /dev/gvinum/vhost_small
crw-r----- 1 root operator 4, 60 Jul 7 19:50 /dev/gvinum/vhost_small
Even more strange for me is, that also my "real" partitions are also
character devices, e.g.:
# ls -la /dev/da0s1a
crw-r----- 1 root operator 4, 14 Jul 7 19:50 /dev/da0s1a
which makes me wonder what do other people with monit and freebsd ?
So I kept getting an error when running monit:
monit: Not file, directory or block special device:
'/dev/gvinum/vhost_small'
'athos_disk' unable to read device /dev/gvinum/vhost_small state
After some looking into the source I finally found this piece in
device/device_common.c line 98
} else if(S_ISBLK(buf.st_mode)) {
which i modified to read
} else if(S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode)) {
It compiles and links well, but after starting monit -I -c i got strange
results
'athos_disk' succeeded getting device statistic for /dev/gvinum/vhost_small
which looks okay for me (monit notified me that data access succeeded)
but than:
'athos_disk' filesystem doesn't support inodes
'athos_disk' filesystem doesn't support inodes
'athos_disk' space usage 100.0% matches resource limit [space usage>99.0%]
which is totally wrong:
# df -h
/dev/gvinum/vhost_small 9.7G 231M 8.7G 3%
/data/jails/vhost_small
Am I doing something wrong here ?
Any help would be appreciated.
Thx for listening
Peter Klett
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