Troubleshooting File System Issues

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Troubleshooting File System Issues

**Warning**: This lab represents a significantly broken environment and goes well beyond simple troubleshooting. In this lab, you must resolve any issues preventing the content mounted at `/storage` from being accessed. *This course is not approved or sponsored by Red Hat.*

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Lab Info

Level

Advanced

Last updated

Sep 13, 2025

Duration

4h 0m

Challenge

Verify the iSCSI target configuration and status.
On Server1 (10.0.1.10)

Verify the target service is running:
```
systemctl status target
```
Start and enable the target service:
```
systemctl start target && systemctl enable target
```
Verify the process is listening on port 3260:
```
ss -ltnp | grep 3260
```
Check if the firewall is permitting traffic over 3260/tcp:
```
firewall-cmd --list-all
```
Permit incoming traffic over port 3260/tcp:
```
firewall-cmd --permanent --add-port=3260/tcp
```
Reload the firewall:
```
firewall-cmd --reload
```
View the iSCSI target configuration:
```
targetcli
```
```
/> ls
```

Challenge

Verify the iSCSI initiator configuration and status.

On Server2 (10.0.1.11)

View any existing node entires:

iscsiadm -m node

Verify the initiator name matches the ACL from the target:

cat /etc/iscsi/initiatorname.iscsi

Change the name to match the target:

InitiatorName=iqn.1994-05.com.redhat:c1cd6e78d22

Verify security settings match those of target:

less /etc/iscsi/iscsid.conf

#node.session.auth.authmethod = CHAP
...
#node.session.auth.username = username
#node.session.auth.password = password

Restart the iscsid service to pick up the change:

systemctl restart iscsid

Discover iSCSI targets from 10.0.1.10:

iscsiadm -m discovery -t sendtargets -p 10.0.1.10

iscsiadm -m node -T iqn.2003-01.org.linux-iscsi.ip-10-0-1-10.x8664:sn.a3776832068c -l

Enable the iscsid service to permit connection upon reboot:

systemctl enable iscsid

Challenge

Resolve disk encryption.
Review the contents of /etc/crypttab and /etc/fstab:
```
cat /etc/crypttab
```
```
cat /etc/fstab
```
Attempt to manually open the volume using the key referenced in /etc/crypttab:
```
cryptsetup luksOpen /dev/mapper/vg_1-lv_1 luks-vg_1-lv_1 --key-file /root/passphrase.key
```
View the volume key slots:
```
cryptsetup luksDump /dev/mapper/vg_1-lv_1
```
Restore the LUKS header:
```
cryptsetup luksHeaderRestore /dev/mapper/vg_1-lv_1 --header-backup-file /root/vg_1-lv_1.header
```
Open the volume manually:
```
cryptsetup luksOpen /dev/mapper/vg_1-lv_1 luks-vg_1-lv_1 --key-file /root/passphrase.key
```
View the entries in /dev/mapper:
```
ll /dev/mapper
```
Attempt to mount /storage:
```
mount /storage
```
View the file system label:
```
blkid
```
The volume appears to be a swap format, however the entry in /etc/fstab suggests it's an XFS file system. Repair the file system:
```
xfs_repair /dev/mapper/luks-vg_1-lv_1
```
Mount /storage:
```
mount /storage
```
View the contents of /storage:
```
ll /storage
```

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