[bionic] fence_scsi does not support hostnames in node list

[Rafael David Tinoco]

Whenever configuring fence_scsi in a pacemaker cluster, the "fence_scsi" fencing agent won't support having node names in its pcmk_host_list. You can reproduce this behavior using the fence_scsi agent directly:

$ sudo fence_scsi --verbose -n clubionic01 --action=off -d /dev/disk/by-path/acpi-VMBUS:01-scsi-0:0:0:0

Delay 0 second(s) before logging in to the fence device
Executing: /usr/sbin/corosync-cmapctl totem.cluster_name

0 totem.cluster_name (str) = clubionic

Executing: /usr/sbin/corosync-cmapctl nodelist.

0 nodelist.local_node_pos (u32) = 0
nodelist.node.0.name (str) = clubionic01
nodelist.node.0.nodeid (u32) = 1
nodelist.node.0.ring0_addr (str) = 10.250.3.10
nodelist.node.1.name (str) = clubionic02
nodelist.node.1.nodeid (u32) = 2
nodelist.node.1.ring0_addr (str) = 10.250.3.11
nodelist.node.2.name (str) = clubionic03
nodelist.node.2.nodeid (u32) = 3
nodelist.node.2.ring0_addr (str) = 10.250.3.12

Failed: unable to parse output of corosync-cmapctl or node does not exist

Please use '-h' for usage

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When using IP address fence_scsi agent works:

rafaeldtinoco@clubionic01:~$ sudo fence_scsi --verbose -n 10.250.3.10 --action=off -d /dev/disk/by-path/acpi-VMBUS:01-scsi-0:0:0:0
Delay 0 second(s) before logging in to the fence device
Executing: /usr/sbin/corosync-cmapctl totem.cluster_name

0 totem.cluster_name (str) = clubionic

Executing: /usr/sbin/corosync-cmapctl nodelist.

0 nodelist.local_node_pos (u32) = 0
nodelist.node.0.name (str) = clubionic01
nodelist.node.0.nodeid (u32) = 1
nodelist.node.0.ring0_addr (str) = 10.250.3.10
nodelist.node.1.name (str) = clubionic02
nodelist.node.1.nodeid (u32) = 2
nodelist.node.1.ring0_addr (str) = 10.250.3.11
nodelist.node.2.name (str) = clubionic03
nodelist.node.2.nodeid (u32) = 3
nodelist.node.2.ring0_addr (str) = 10.250.3.12

Executing: /usr/bin/sg_turs /dev/disk/by-path/acpi-VMBUS:01-scsi-0:0:0:0

0

Executing: /usr/bin/sg_turs /dev/disk/by-path/acpi-VMBUS:01-scsi-0:0:0:0

0

Executing: /usr/bin/sg_persist -n -i -k -d /dev/disk/by-path/acpi-VMBUS:01-scsi-0:0:0:0

0 PR generation=0x4, there are NO registered reservation keys

No registration for key 3abe0000 on device /dev/disk/by-path/acpi-VMBUS:01-scsi-0:0:0:0

Success: Already OFF