I'm working on monitoring the read only status of Linux file systems at work... and... It's not going as expected.
For instance, on a remote RHEL 6.1 system with Net:SNMP 5.5 installed, remount a file system read-only (like /boot), then walk .1.3.6.1.2.1.25.3.8.1 . hrFSAccess reports readOnly(2) for the file system. Then remount it read-write, and walk it again. Wait an hour and walk it a third time. hrFSAccess reports it as readOnly(2) when it's readWrite. A bit more detail. I've already toggled it on a test system, cp0126. Here's what happens when I walk it from a remote system, scl2. I get the same results if I walk it off of cp0126: [em7admin@scl2 ~]$ snmpwalk -v1 -c REDACTED cp0126 .1.3.6.1.2.1.25.3.8.1 HOST-RESOURCES-MIB::hrFSIndex.1 = INTEGER: 1 HOST-RESOURCES-MIB::hrFSIndex.5 = INTEGER: 5 HOST-RESOURCES-MIB::hrFSIndex.6 = INTEGER: 6 HOST-RESOURCES-MIB::hrFSMountPoint.1 = STRING: "/" HOST-RESOURCES-MIB::hrFSMountPoint.5 = STRING: "/dev/shm" HOST-RESOURCES-MIB::hrFSMountPoint.6 = STRING: "/boot" HOST-RESOURCES-MIB::hrFSRemoteMountPoint.1 = "" HOST-RESOURCES-MIB::hrFSRemoteMountPoint.5 = "" HOST-RESOURCES-MIB::hrFSRemoteMountPoint.6 = "" HOST-RESOURCES-MIB::hrFSType.1 = OID: HOST-RESOURCES-TYPES::hrFSLinuxExt2 HOST-RESOURCES-MIB::hrFSType.5 = OID: HOST-RESOURCES-TYPES::hrFSOther HOST-RESOURCES-MIB::hrFSType.6 = OID: HOST-RESOURCES-TYPES::hrFSLinuxExt2 HOST-RESOURCES-MIB::hrFSAccess.1 = INTEGER: readWrite(1) HOST-RESOURCES-MIB::hrFSAccess.5 = INTEGER: readWrite(1) HOST-RESOURCES-MIB::hrFSAccess.6 = INTEGER: readOnly(2) HOST-RESOURCES-MIB::hrFSBootable.1 = INTEGER: true(1) HOST-RESOURCES-MIB::hrFSBootable.5 = INTEGER: false(2) HOST-RESOURCES-MIB::hrFSBootable.6 = INTEGER: false(2) HOST-RESOURCES-MIB::hrFSStorageIndex.1 = INTEGER: 31 HOST-RESOURCES-MIB::hrFSStorageIndex.5 = INTEGER: 35 HOST-RESOURCES-MIB::hrFSStorageIndex.6 = INTEGER: 36 HOST-RESOURCES-MIB::hrFSLastFullBackupDate.1 = STRING: 0-1-1,0:0:0.0 HOST-RESOURCES-MIB::hrFSLastFullBackupDate.5 = STRING: 0-1-1,0:0:0.0 HOST-RESOURCES-MIB::hrFSLastFullBackupDate.6 = STRING: 0-1-1,0:0:0.0 HOST-RESOURCES-MIB::hrFSLastPartialBackupDate.1 = STRING: 0-1-1,0:0:0.0 HOST-RESOURCES-MIB::hrFSLastPartialBackupDate.5 = STRING: 0-1-1,0:0:0.0 HOST-RESOURCES-MIB::hrFSLastPartialBackupDate.6 = STRING: 0-1-1,0:0:0.0 And yet... root@cp0126 [~]# mount /dev/mapper/vg_cp0000-lv_root on / type ext4 (rw,usrjquota=quota.user,jqfmt=vfsv0) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0") /dev/sda1 on /boot type ext4 (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) root@cp0126 [~]# cat /etc/system-release Red Hat Enterprise Linux Server release 6.10 (Santiago) root@cp0126 [~]# cat /proc/mounts rootfs / rootfs rw 0 0 proc /proc proc rw,relatime 0 0 sysfs /sys sysfs rw,seclabel,relatime 0 0 devtmpfs /dev devtmpfs rw,seclabel,relatime,size=1952088k,nr_inodes=488022,mode=755 0 0 devpts /dev/pts devpts rw,seclabel,relatime,gid=5,mode=620,ptmxmode=000 0 0 tmpfs /dev/shm tmpfs rw,seclabel,relatime 0 0 /dev/mapper/vg_cp0000-lv_root / ext4 rw,seclabel,relatime,barrier=1,data=ordered,jqfmt=vfsv0,usrjquota=quota.user 0 0 none /selinux selinuxfs rw,relatime 0 0 devtmpfs /dev devtmpfs rw,seclabel,relatime,size=1952088k,nr_inodes=488022,mode=755 0 0 /proc/bus/usb /proc/bus/usb usbfs rw,relatime 0 0 /dev/sda1 /boot ext4 rw,seclabel,relatime,barrier=1,data=ordered 0 0 none /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0 /etc/auto.misc /misc autofs rw,relatime,fd=7,pgrp=1816,timeout=300,minproto=5,maxproto=5,indirect 0 0 -hosts /net autofs rw,relatime,fd=13,pgrp=1816,timeout=300,minproto=5,maxproto=5,indirect 0 0 If I restart snmpd, it reads the file system RW... but once it goes RO, it stays RO. Is this a bug in an old version of Net-snmp? I don't have access to a current version. -- Kelly "STrRedWolf" Price http://redwolf.ws _______________________________________________ Net-snmp-users mailing list Net-snmp-users@lists.sourceforge.net Please see the following page to unsubscribe or change other options: https://lists.sourceforge.net/lists/listinfo/net-snmp-users
