vagrant synced folders not working real-time on virtualbox - linux

Question

my synced folders are not working properly, they are synced one-time at start but when I make changes on the host machine, vagrant is not syncing it real-time.
First some details on my system:
OS: Linux Mint 18 Sarah
Virtualbox version: 5.0.24-dfsg-0ubuntu1.16.04.1
Vagrant version: 1.9.0
vagrant-hostmanager (1.8.5)
vagrant-share (1.1.6)
vagrant-vbguest (0.13.0)
Before we start discussing, I am not using newest version of Virtualbox since it is not in the repository and a simple vagrant up fails.
My Vagrantfile:
Vagrant.configure("2") do |config|
config.vm.box = "centos/7"
config.vm.network "private_network", ip: "192.168.88.88"
config.vm.hostname = "my.centos.dev"
end
vagrant up gives me this.
Now when I create a file on the host machine:
falnyr#mint:~/centos-vagrant $ ls
ansible Vagrantfile
falnyr#mint:~/centos-vagrant $ touch file.txt
falnyr#mint:~/centos-vagrant $ ls
ansible file.txt Vagrantfile
And ssh to guest machine:
falnyr#mint:~/centos-vagrant $ vagrant ssh
[vagrant#my ~]$ ls /vagrant/
ansible Vagrantfile
As you can see, the file is not created. When I perform vagrant reload the sync is executed again during machine boot.
Note: I cannot use NFS sync, since I need cross-platform ready environment.
Any ideas on how to enable real-time sync?

Answer 1

The owner of the box has enabled rsync by default on the sync type. If you look at Vagrantfile of your box (in my case its ~/.vagrant.d/boxes/centos-VAGRANTSLASH-7/0/vmware_fusion but yours might probably under the virtualbox provider) you'll see a Vagrantfile with content
Vagrant.configure("2") do |config|
config.vm.synced_folder ".", "/vagrant", type: "rsync"
end
Just remove this file from the box directory and it will work.
note if you plan to use nfs you can change the sync type in your Vagrantfile
Vagrant.configure("2") do |config|
config.vm.box = "centos/7"
config.vm.network "private_network", ip: "192.168.88.88"
config.vm.hostname = "my.centos.dev"
config.vm.synced_folder ".", "/vagrant", type: "nfs"
end

Answer 2

You can use rsync-auto command:
vagrant rsync-auto
Actually, when I had a problem with sync, adding type: nfs helped me:
config.vm.synced_folder ".", "/home/ubuntu/qb-online", type: "nfs"
You can read more information from the documentation:
https://www.vagrantup.com/docs/synced-folders/rsync.html

Answer 3

Vagrant.configure("2") do |config|
config.vm.synced_folder ".", "/vagrant", type: "nfs",
rsync__exclude: ".git/"
end
just use the 2nd and 3rd line inside
Vagrant.configure("2") do |config|
#place here
end

Answer 4

If Anyone is Facing this issue vbox "Syncing/Mount" just enter the Vagrant ssh where the vagrant file is without vagrant up and run the command "sudo yum upgrade" dat'll Take time once it'll get finished exit the vagrant and hit vagrant up again.Issue will resolved. .. :)
and make sure If You are using Centos use "Bento/Centos" in Your VagrantFile
List item
vagrant ssh
sudo yum upgrade
vagrant reload