[ClusterLabs] "iscsi.service: Unit cannot be reloaded because it is inactive."

[Jason Long]

Hello,
I configure my clustering labs with three nodes. One of my nodes is iSCSI Shared Storage. Everything was OK until I restarted my iSCSI Shared Storage. On node1 I checked the status of my cluster:

# pcs status 
Cluster name: mycluster
Cluster Summary:
  * Stack: corosync
  * Current DC: node1 (version 2.0.5-10.fc33-ba59be7122) - partition with quorum
  * Last updated: Sat Apr  3 18:45:49 2021
  * Last change:  Mon Mar 29 19:36:35 2021 by root via cibadmin on node1
  * 2 nodes configured
  * 3 resource instances configured


Node List:
  * Online: [ node1 node2 ]


Full List of Resources:
  * Resource Group: apache:
    * httpd_fs    (ocf::heartbeat:Filesystem):     Stopped
    * httpd_vip    (ocf::heartbeat:IPaddr2):     Stopped
    * httpd_ser    (ocf::heartbeat:apache):     Stopped


Failed Resource Actions:
  * httpd_fs_start_0 on node1 'not installed' (5): call=14, status='complete', exitreason='Couldn't find device [/dev/mapper/vg_apache-lv_apache]. Expected /dev/??? to exist', last-rc-change='2021-04-03 18:37:04 +04:30', queued=0ms, exec=502ms
  * httpd_fs_start_0 on node2 'not installed' (5): call=14, status='complete', exitreason='Couldn't find device [/dev/mapper/vg_apache-lv_apache]. Expected /dev/??? to exist', last-rc-change='2021-04-03 18:37:05 +04:30', queued=0ms, exec=540ms


Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled


And checked the iSCSI Shared Storage. It showed me below error:

[root at node3 ~]# systemctl status iscsi.service 
● iscsi.service - Login and scanning of iSCSI devices
     Loaded: loaded (/usr/lib/systemd/system/iscsi.service; enabled; vendor preset: enabled)
     Active: inactive (dead)
  Condition: start condition failed at Sat 2021-04-03 18:49:08 +0430; 2s ago
             └─ ConditionDirectoryNotEmpty=/var/lib/iscsi/nodes was not met
       Docs: man:iscsiadm(8)
             man:iscsid(8)


Apr 03 18:39:17 node3.localhost.localdomain systemd[1]: Condition check resulted in Login and scanning of iSCSI devices being skipped.
Apr 03 18:39:17 node3.localhost.localdomain systemd[1]: iscsi.service: Unit cannot be reloaded because it is inactive.
Apr 03 18:39:17 node3.localhost.localdomain systemd[1]: iscsi.service: Unit cannot be reloaded because it is inactive.
Apr 03 18:49:08 node3.localhost.localdomain systemd[1]: Condition check resulted in Login and scanning of iSCSI devices being skipped.


Why "iscsi.service" is inactive? I tried to restart it, but it couldn't start!
How to solve it?

Thanks.