Vagrant and bitcoind synced_folder problem

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If you are trying to build a bitcoind server with Vagrant, you’ll have problem with synced_folder.


I’m not very sure yet…
You shouldn’t use default synced_folder.

I tried NFS for synced_folder and it worked!!

My Vagrantfile


Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| = "hashicorp/precise64"
  config.vm.provision :shell, :path => "", privileged: false :private_network, ip: ""

# Original
#  config.vm.synced_folder "data/", "/home/vagrant/.bitcoin/"
# NFS version
  config.vm.synced_folder "data/", "/home/vagrant/.bitcoin/", type: "nfs"

  config.vm.provider "virtualbox" do |vb|
    vb.customize ["modifyvm", :id, "--memory", "1536"]

  config.vm.provider "vmware" do |vmw|
    vmw.customize ["modifyvm", :id, "--memory", "1536"]

See Vagrant document for NFS settings.

Other solution from Hasimir

Create a virtual disk on the file/network server.
Get VirtualBox (or VMWare or whatever) to see that.
Mount the disk image as normal.
As far as the VM/OS is concerned it’s just an ordinary drive.
This means you can do other nifty things to such a drive (like encrypt it with LUKS/dm-crypt).


  • Bitcoin Core 0.9.2
  • Vagrant with VirtualBox (Ubuntu 12.04 64bit on Mac OS X)


  • Samba(or file sharing) doesn’t support LevelDB feature. (I guess…)



No, this is LevelDB reporting that an internal system call returned with an error status indicating that an invalid argument was passed.

I assume that the samba filesystem does not offer certain functionality that LevelDB requires of its databases, such a certain types of locking, syncing or mmaping.


When you run bitcoind, you will see the error like…

: Error opening block database.

Do you want to rebuild the block database now?

In debug.log

2015-01-10 17:29:50 init message: Loading block index...
2015-01-10 17:29:50 Opening LevelDB in /home/vagrant/.bitcoin/blocks/index
2015-01-10 17:29:50 IO error: /home/vagrant/.bitcoin/blocks/index: Invalid argument


Vagrant File I Used

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