<div dir="ltr"><div>Hi all,</div><div><br></div><div>Would you be able to advise on the correct use of the "lctl get_param health_check" command from <a href="https://wiki.lustre.org/Lustre_Health_Checks">https://wiki.lustre.org/Lustre_Health_Checks</a> and under which circumstances it reports errors?</div><div><br></div><div>I've found it always returns "healthy", even when I intentionally break my test setup. For example, removing Lustre mounts:</div><div><br></div><div>root@lustre-build:~# mount -t lustre mytestpool/mgsmdt /mnt/mgs_mdt<br>root@lustre-build:~# mount -t lustre ostpool/ost1 /mnt/ost<br>root@lustre-build:~# lctl get_param health_check<br>health_check=healthy<br>root@lustre-build:~# umount /mnt/ost<br>root@lustre-build:~# lctl get_param health_check<br>health_check=healthy</div><div>root@lustre-build:~# umount /mnt/mgs_mdt</div><div>root@lustre-build:~# lctl get_param health_check<br>health_check=healthy</div><div></div><div><br></div><div>My setup is a single Ubuntu 24.04 VM with Lustre 2.17 built from source. The Lustre file system was created with:</div><div><br></div><div>root@lustre-build:~# truncate -s 5G /root/mgs_mdt.img<br>root@lustre-build:~# truncate -s 10G /root/ost.img<br>root@lustre-build:~# mkfs.lustre --mgs --mdt --backfstype=zfs --fsname=mytestfs --index=0 mytestpool/mgsmdt /root/mgs_mdt.img<br>root@lustre-build:~# MGS_IP=$(hostname -I | awk '{print $1}')<br>root@lustre-build:~# mkfs.lustre --ost --backfstype=zfs --fsname=mytestfs --mgsnode=${MGS_IP}@tcp0 --index=0 ostpool/ost1 /root/ost.img</div><div><br></div><div>Regards,</div><div>Dominic</div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><table style="border-spacing:0px;border-width:0px;font-family:Ubuntu,sans-serif;margin:0px;color:rgb(0,0,0);border-color:white"><tbody><tr><th style="vertical-align:top;padding:4px 0px 0px 4px;font-size:0px;text-align:left" colspan="2"><img height="40px" width="128px" style="margin-bottom:17px" src="https://assets.ubuntu.com/v1/7620920d-Canonical-Logo-Light%201.png" alt="Canonical Logo" title="Canonical Logo">
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