The Ansible module “vmware_dns_config” will incorrectly return a “changed”
condition, even when the arguments are unchanged.
The vmware_dns_config module does run correctly and changes the ESXi DNS
settings as needed, but it always reports a “changed” state.
For example:
- name: Configure DNS for ESXi
vmware_dns_config:
hostname: '{{ inventory_hostname }}'
username: '{{ vcenter_username }}'
password: '{{ vcenter_password }}'
validate_certs: no
# We're not changing the hostname, but it is a required field.
change_hostname_to: '{{ inventory_hostname }}'
domainname: mydomain.org
dns_servers:
- 8.8.8.8
- 8.8.4.4
delegate_to: localhost
If you run the task a second time, Ansible will report a “changed” state.
Ansible version: 2.7.5 (from CentOS 7.x epel repository)
yum package ansible.noarch
2.6.3-1.el7
Linux: CentOS 7.5.1804
A quick review of the vmware_dns_config.py source code shows that a simple
“!=” inequality operator is being used to compare the existing DNS servers
data structure to the DNS servers data structure passed as arguments in the
task statement. There is no normalization to a “list” structure, for
example.
The source code handling of the dns_servers list is very different than the
handling of the “ntp_servers” list in the “vmware_host_ntp” module as a
comparison, and vmware_host_ntp correctly reports an unchanged status when
running the task for a second time with unchanged arguments.
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