fence_aliyun fails on RHEL 8 with "NameError: name 'client' is not defined"

Solution Verified - Updated

Environment

  • Red Hat Enterprise Linux (RHEL) 8 with the High Availability Add-on
  • Alibaba Cloud (Aliyun)

Issue

  • fence_aliyun commands fail on RHEL 8 with "NameError: name 'client' is not defined".
[root@rhel-8-node1 ~]# fence_aliyun -r us-west-1 -a <access_key> -s <secret_key> -o list
Traceback (most recent call last):
  File "/usr/sbin/fence_aliyun", line 160, in <module>
    main()
  File "/usr/sbin/fence_aliyun", line 152, in main
    conn = client.AcsClient(access_key, secret_key, region)
NameError: name 'client' is not defined

Resolution

Red Hat Enterprise Linux 8.0


Upgrade to [`fence-agents-aliyun-4.2.1-17.el8_0.3`](/errata/RHBA-2019:1526) or later.

Red Hat Enterprise Linux 8.1 or later


Upgrade to [`fence-agents-aliyun-4.2.1-30.el8`](/errata/RHBA-2019:3326) or later.

Root Cause

The fence_aliyun fence agent was written for Python2. Module names and module search paths have changed in Python3. RHEL 8 only ships Python3, so the fence agent fails due to missing modules.

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