How to monitor hardware RAID with MegaCli (LSI RAID)#

If you want to monitor a target computer RAID array, and if your target computer is equipped with LSI RAID controller(s), then this section is for you!

Note

MegaCli ss also known as CmdTool2.

Important

🙏 Help is welcome / appreciated 🙏

🚧 WiP / TODO 🚧

Prerequisites:

On the target computer, install MegaCli in /opt/MegaRAID/MegaCli/MegaCli64 like described here or here.

Allow sshmonitor-user to use MegaCli as root without password (thanks to sudo and visudo):

target-pc # visudo
    > ...
    > ## Allows asnet user to run /opt/MegaRAID/MegaCli/Megacli64 as root without password:
    > sshmonitor-user ALL = NOPASSWD: /opt/MegaRAID/MegaCli/MegaCli64

Create a symlink for the restricted bash environment:
```
target-pc # ln -s /opt/MegaRAID/MegaCli/MegaCli64 /home/sshmonitor-user/bin/megacli
```
See the security how-to and the security explanations for more details.

Add the following alias in the .bashrc:

target-pc # vi /home/sshmonitor-user/.bashrc

    > readonly PATH=$HOME/bin
  + >
  + > alias megacli="sudo megacli"

Make sure MegaCli is working well with the sshmonitor-user:

target-pc $ echo $USER

    sshmonitor-user

target-pc $ megacli -adpallinfo -aALL

    ...

On the host computer, add the following to your .substitutions file:

>     ...
+ >
+ >     # LSI RAID monitoring
+ >     {
+ >         CATEGORY="lsi_raid:"
+ > 
+ >         # Shell instruction used to get the LSI RAID state (0: OK, 1: KO), and associated EPICS alarm
+ >         PV_NAME_SCALAR_1="lsi_raid_state"
+ >         SCALAR_1_INSTRUCTION="megacli -LDInfo -Lall -aAll | grep State | awk '{print \\\\$3}' | sed 's/Optimal/0/' | sed 's/Degraded/1/' | sed 's/Failed/2/' | sort -n -r | head -n 1"
+ >         LOAD_SCALAR_1 = ""
+ >         HIHI_SCALAR_1 = "1"
+ >         HHSV_SCALAR_1 = "MAJOR"
+ >         PINI_SCALAR_1 = "1"
+ >     }
+ > 
> }

🚧 TODO 🚧

Make sure that the configuration described in this how-to will work in a restricted bash environment.