Change of mount opts doesn't work as expected

[jbarotin]

SUMMARY

ISSUE TYPE

• Bug Report

COMPONENT NAME

ansible.posix.mount

ANSIBLE VERSION

ansible [core 2.12.5]
  config file = /home/jerome/.ansible.cfg
  configured module search path = ['/home/jerome/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/jerome/.local/lib/python3.9/site-packages/ansible
  ansible collection location = /home/jerome/.ansible/collections:/usr/share/ansible/collections
  executable location = /home/jerome/.local/bin/ansible
  python version = 3.9.7 (default, Sep 10 2021, 14:59:43) [GCC 11.2.0]
  jinja version = 3.0.3
  libyaml = True

COLLECTION VERSION

CONFIGURATION

HOST_KEY_CHECKING(/home/jerome/.ansible.cfg) = False
INTERPRETER_PYTHON(/home/jerome/.ansible.cfg) = /usr/bin/python3
MAX_FILE_SIZE_FOR_DIFF(/home/jerome/.ansible.cfg) = 999999999
RETRY_FILES_ENABLED(/home/jerome/.ansible.cfg) = False

OS / ENVIRONMENT

Client : Ubuntu 21.10 Host : Ubuntu 20.04

STEPS TO REPRODUCE

I've got the following initial configuration in my playbook :

- name: Mount & Configure /my/path
  mount:
    path: /my/path
    src: 1.2.3.4:/myhost/mydir
    fstype: nfs
    opts: "rw,_netdev,mountproto=tcpn"
    state: mounted

execution of the mount command on the host give the following line :

1.2.3.4:/myhost/mydir on /my/path type nfs (rw,relatime,vers=3,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=1.2.3.4,mountvers=3,mountport=1050,mountproto=tcp,local_lock=none,addr=1.2.3.4,_netdev)

I want to enable nfs no cache, I edit the mount task in my playbook adding nocp on opts parameter:

- name: Mount & Configure /my/path
  mount:
    path: /my/path
    src: 1.2.3.4:/myhost/mydir
    fstype: nfs
    opts: "rw,_netdev,mountproto=tcpn,noac"
    state: mounted

I execute my playbook, and all work as expected :

• the task "Mount & Configure /my/path" is in the state CHANGED
• on the host we can find the following line in /etc/fstab :

1.2.3.4:/myhost/mydir /my/path nfs rw,_netdev,mountproto=tcp 0 0

• we can also find the following line while executing "mount" command :

1.2.3.4:/myhost/mydir on /my/path type nfs (rw,relatime,sync,vers=3,rsize=131072,wsize=131072,namlen=255,acregmin=0,acregmax=0,acdirmin=0,acdirmax=0,hard,noac,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=1.2.3.4,mountvers=3,mountport=1050,mountproto=tcp,local_lock=none,addr=1.2.3.4,_netdev)

Then, I want to enable back the nfs cache. I edit the mount task in my playbook removing the nocp at the of the line of opts parameter:

- name: Mount & Configure /my/path
  mount:
    path: /my/path
    src: 1.2.3.4:/myhost/mydir
    fstype: nfs
    opts: "rw,_netdev,mountproto=tcpn"
    state: mounted

I execute my playbook :

• the task "Mount & Configure /my/path" is in the state CHANGED
• on the host, we can find the following line in /etc/fstab

1.2.3.4:/myhost/mydir /my/path nfs rw,_netdev,mountproto=tcp 0 0

EXPECTED RESULTS

If I execute "mount" in the bash prompt on the host, I expect to see the following line with no mention about the noac option :

1.2.3.4:/myhost/mydir on /my/path type nfs (rw,relatime,vers=3,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=1.2.3.4,mountvers=3,mountport=1050,mountproto=tcp,local_lock=none,addr=1.2.3.4,_netdev)

ACTUAL RESULTS

If I execute "mount" in the bash prompt on the host, it displays the following line :

1.2.3.4:/myhost/mydir on /my/path type nfs (rw,relatime,sync,vers=3,rsize=131072,wsize=131072,namlen=255,acregmin=0,acregmax=0,acdirmin=0,acdirmax=0,hard,noac,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=1.2.3.4,mountvers=3,mountport=1050,mountproto=tcp,local_lock=none,addr=1.2.3.4,_netdev)

We can see that the noac option is still effective on the host.