Mount an NFS share in Linux - Ansible module mount

How to mount an NFS share in Linux. The Ansible Playbook code is going to check the required packages, create the mount-point, and set up the NFS network shared folder using NFS4 protocol on the Linux target machine. Demo and live coding included for RedHat-like and Debian-like systems.

November 25, 2021

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#ansible #mount #linux #nfs #network-file-system #fstab

I’m going to show you a live demo with some simple Ansible code. I’m Luca Berton and welcome to today’s episode of Ansible Pilot.

ansible.posix.mount
Control active and configured mount points

Today we’re talking about the Ansible module mount. The full name is ansible.posix.mount, which means that is part of the collection of modules “ansible.posix” to interact with POSIX platforms. The purpose of the module is to control active and configured mount points. For Windows, use the community.windows.win_mapped_drive module instead.

Parameters

path string - mount point (e.g. /mnt)
state string - mounted / unmounted / present / absent / remounted
src string - device or network volume
fstype string - ext4, xfs, iso9660, nfs, cifs, etc.
opts string- mount options

This module has many parameters to perform any task. The only required are “path” and “state”. The parameter “path” specifies the path to the mount point (e.g. /mnt/). The parameter “state” allows us to verify a specific state of the mount point. The options “mounted”, “unmounted” and “remounted” change the device status. The “present” and “absent” options only change the /etc/fstab file. The src parameter specifies the device or network volume for NFS or SMB/CIFS. The fstype parameter specifies the filesystem type. For example ext4, XFS, iso9660, NFS, CIFS, etc. The opts parameter allows us to specify some mount options, that vary for each filesystem type.

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demo

Let’s jump in a real-life Ansible Playbook to mount an NFS share in Linux RedHat-like and Debian-like.

code

nfs.yml

---
- name: mount module demo
  hosts: all
  become: true
  vars:
    mynfs: "192.168.0.200:/nfs/share"
    mountpoint: "/share"
    permission: '0777'
    myopts: 'rw,sync'
  tasks:
    - name: utility present redhat-like
      ansible.builtin.yum:
        name:
          - nfs-utils
          - nfs4-acl-tools
        state: present
      when: ansible_os_family == 'RedHat'

    - name: utility present debian-like
      ansible.builtin.apt:
        name:
          - nfs-common
          - nfs4-acl-tools
        state: present
      when: ansible_os_family == 'Debian'

    - name: check mountpoint exist
      ansible.builtin.file:
        path: "{{ mountpoint }}"
        state: directory
        mode: "{{ permission }}"
        owner: root
        group: root

    - name: mount network share
      ansible.posix.mount:
        src: "{{ mynfs }}"
        path: "{{ mountpoint }}"
        fstype: nfs
        opts: "{{ myopts }}"
        state: mounted

execution

$ ansible-playbook -i virtualmachines/demo/inventory mount\ drive/nfs.yml
PLAY [mount module demo] **************************************************************************
TASK [Gathering Facts] ****************************************************************************
ok: [demo.example.com]
TASK [utility present redhat-like] ****************************************************************
changed: [demo.example.com]
TASK [utility present debian-like] ****************************************************************
skipping: [demo.example.com]
TASK [check mountpoint exist] *********************************************************************
changed: [demo.example.com]
TASK [mount network share] ************************************************************************
changed: [demo.example.com]
PLAY RECAP ****************************************************************************************
demo.example.com           : ok=4    changed=3    unreachable=0    failed=0    skipped=1    rescued=0    ignored=0

before execution

$ ssh [email protected]
[[email protected] ~]$ sudo su
[[email protected] devops]# cat /etc/redhat-release 
Red Hat Enterprise Linux release 8.4 (Ootpa)
[[email protected] devops]# yum list nfs-utils
Updating Subscription Management repositories.
Last metadata expiration check: 0:28:59 ago on Wed 24 Nov 2021 11:17:15 AM UTC.
Available Packages
nfs-utils.x86_64                    1:2.3.3-46.el8                    rhel-8-for-x86_64-baseos-rpms
[[email protected] devops]# showmount --exports 192.168.0.200
bash: showmount: command not found
[[email protected] devops]# ls -al /share
ls: cannot access '/share': No such file or directory
[[email protected] devops]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Wed Sep  1 00:06:23 2021
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
/dev/mapper/rhel_rhel8-root /                       xfs     defaults        0 0
UUID=ae6c1777-c1c9-42a1-8fcf-513077aac39b /boot                   xfs     defaults        0 0
/dev/mapper/rhel_rhel8-swap none                    swap    defaults        0 0
[[email protected] devops]# mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime,seclabel)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,seclabel,size=395492k,nr_inodes=98873,mode=755)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,seclabel)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,seclabel,mode=755)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,seclabel,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime,seclabel)
bpf on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,cpuset)
cgroup on /sys/fs/cgroup/rdma type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,rdma)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,pids)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,hugetlb)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,cpu,cpuacct)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,freezer)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,blkio)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,net_cls,net_prio)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,perf_event)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,memory)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,devices)
none on /sys/kernel/tracing type tracefs (rw,relatime,seclabel)
configfs on /sys/kernel/config type configfs (rw,relatime)
/dev/mapper/rhel_rhel8-root on / type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
mqueue on /dev/mqueue type mqueue (rw,relatime,seclabel)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,seclabel,pagesize=2M)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=38,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=18508)
debugfs on /sys/kernel/debug type debugfs (rw,relatime,seclabel)
/dev/sda1 on /boot type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
tmpfs on /run/user/1001 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=82872k,mode=700,uid=1001,gid=10)
[[email protected] devops]#

after execution

$ ssh [email protected]
[[email protected] ~]$ sudo su
[[email protected] devops]# yum list nfs-utils
Updating Subscription Management repositories.
Last metadata expiration check: 0:31:28 ago on Wed 24 Nov 2021 11:17:15 AM UTC.
Installed Packages
nfs-utils.x86_64                   1:2.3.3-46.el8                    @rhel-8-for-x86_64-baseos-rpms
[[email protected] devops]# showmount --exports 192.168.0.200
Export list for 192.168.0.200:
/nfs/share 192.168.0.200/24
[[email protected] devops]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Wed Sep  1 00:06:23 2021
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
/dev/mapper/rhel_rhel8-root /                       xfs     defaults        0 0
UUID=ae6c1777-c1c9-42a1-8fcf-513077aac39b /boot                   xfs     defaults        0 0
/dev/mapper/rhel_rhel8-swap none                    swap    defaults        0 0
192.168.0.200:/nfs/share /share nfs rw,sync 0 0
[[email protected] devops]# mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime,seclabel)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs (rw,nosuid,seclabel,size=395492k,nr_inodes=98873,mode=755)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,seclabel)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,seclabel,mode=755)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,seclabel,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime,seclabel)
bpf on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,cpuset)
cgroup on /sys/fs/cgroup/rdma type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,rdma)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,pids)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,hugetlb)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,cpu,cpuacct)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,freezer)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,blkio)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,net_cls,net_prio)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,perf_event)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,memory)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,seclabel,devices)
none on /sys/kernel/tracing type tracefs (rw,relatime,seclabel)
configfs on /sys/kernel/config type configfs (rw,relatime)
/dev/mapper/rhel_rhel8-root on / type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
mqueue on /dev/mqueue type mqueue (rw,relatime,seclabel)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,seclabel,pagesize=2M)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=38,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=18508)
debugfs on /sys/kernel/debug type debugfs (rw,relatime,seclabel)
/dev/sda1 on /boot type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
tmpfs on /run/user/1001 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=82872k,mode=700,uid=1001,gid=10)
192.168.0.200:/nfs/share on /share type nfs4 (rw,relatime,sync,vers=4.2,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=192.168.0.190,local_lock=none,addr=192.168.0.200)
[[email protected] devops]# ls -al /share
total 0
drwxrwxrwx.  2 root   root    22 Nov 24 11:34 .
dr-xr-xr-x. 18 root   root   237 Nov 24 11:47 ..
-rw-r--r--.  1 nobody nobody   0 Nov 24 11:34 test.txt
[[email protected] devops]# echo "test" > /share/test2.txt
[[email protected] devops]# ls -al /share
total 4
drwxrwxrwx.  2 root   root    39 Nov 24 11:50 .
dr-xr-xr-x. 18 root   root   237 Nov 24 11:47 ..
-rw-r--r--.  1 nobody nobody   0 Nov 24 11:34 test.txt
-rw-r--r--.  1 nobody nobody   5 Nov 24 11:50 test2.txt
[[email protected] devops]# cat /share/test2.txt 
test
[[email protected] devops]# df -h
Filesystem                   Size  Used Avail Use% Mounted on
devtmpfs                     387M     0  387M   0% /dev
tmpfs                        405M     0  405M   0% /dev/shm
tmpfs                        405M   11M  395M   3% /run
tmpfs                        405M     0  405M   0% /sys/fs/cgroup
/dev/mapper/rhel_rhel8-root   70G  3.2G   67G   5% /
/dev/sda1                   1014M  191M  824M  19% /boot
tmpfs                         81M     0   81M   0% /run/user/1001
192.168.0.200:/nfs/share      70G  2.5G   68G   4% /share
[[email protected] devops]#

code with ❤️ in GitHub

Recap

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