Monitoring Multipath
Posted 2021-06-26 - Updated 2021-07-05
Supported on Linux, Aix, MacOS
Multipath test
- Again if the minimum conditions are met, then multipath state is evaluated. If not we proceed with the next line of Sysmon configuration file.
- Multipath line are only evaluated on Linux.
- Line will only be evaluated if the command ‘multipathd’ is present on system.
- SysMon check each path of the multipath
- If all multipath are active or ready then a “1” is returned (place in column 2).
- If one one them is not “active” or “ready”, a value of 0 is returned.
# ----- Check Linux Multipath Status (0=Error 1=All path(s) are Online/Ready)
# ID COLUMN 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L
check_multipath 0 != 00 01 000 0000 0000 Y Y Y Y Y Y Y Y 00000000 0000 warngrp errgrp -
In the example above, the multipath test returned a problem (“0” in column 2), since “0” is not equal (!=) to “1” (Column 5) then an error is generated (Remember that when column 4 or 5 is “0” they are ignored). The alert will sent to the error group “errgrp” specify in column “K”. This error group got to be part of the Alert Group File ($SADMIN/cfg/alert_group.cfg).
Example on the command use to verify that multipath are all active/ready :
# echo 'show paths' | multipathd -k | grep -vi multipath
0:0:0:0 sda 8:0 1 [active][ready] XX........ 4/20
0:0:0:1 sdb 8:16 1 [active][ready] XX........ 4/20
1:0:0:0 sdc 8:32 1 [active][ready] XXXX...... 8/20
1:0:0:1 sdd 8:48 1 [active][ready] XXXX...... 8/20
See also
| Link to … | Description |
|---|---|
| sadm_sysmon_tui.pl | Command line summary of alerts and failed scripts of all your servers. |
| sadm_sysmon.pl | Client system monitor |
| sadm_fetch_clients.sh | rsync all .rch/.log/.rpt from actives clients to the SADMIN server |
| SysMon configuration file | Client System Monitor configuration file |
| sadmin.cfg | SADMIN main configuration file |