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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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Path Info

Clock icon Advanced
Clock icon 4h 0m
Clock icon Apr 04, 2019

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Table of Contents

  1. Challenge

    Verify the iSCSI target configuration and status.

    On Server1 (

    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:

    /> ls
  2. Challenge

    Verify the iSCSI initiator configuration and status.

    On Server2 (

    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:

    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

    iscsiadm -m discovery -t sendtargets -p

    Log in to target:

    iscsiadm -m node -T -l

    Enable the iscsid service to permit connection upon reboot:

    systemctl enable iscsid
  3. 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:


    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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