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how to put dokku data into block storage?

Posted January 7, 2017 3.3k views
DokkuBlock Storage

By default Dokku have to directory /home/dokku and /var/lib/dokku/. How can i store it in block storage? Purpose in future if upgrade process of the host machine fail i can just unattached block storage, start new droplet, install dokku, mount block storage and all done…

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chengjk
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chengjk

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2 answers
jtittle1 January 7, 2017

@chengjk

You can read the guide below to setup your block storage:

https://www.digitalocean.com/community/tutorials/how-to-use-block-storage-on-digitalocean#preparing-volumes-for-use-in-linux

From there, you have a few options: symlink directories or mount them. But before you do anything below, make sure you backup backup backup. Once you rm -rf a directory, it’s gone and it’s not coming back.

1). Symlink Directories

Since /home/dokku is the current home directory, you would simply create a new directory on the block storage device:

mkdir -p /path/to/block/device/dokku

Copy current data from /home/dokku to the new location:

cp -R /home/dokku/* /path/to/block/storage/dokku

NOTE: Before the next step, make sure all data was successfully copied to the new directory!

Now delete the current directory and create a symlink to the new one:

sudo rm -rf /home/dokku
sudo ln -s /home/dokku /path/to/block/storage/dokku

2). Mount Directories

mkdir -p /path/to/block/device/dokku

Copy current data from /home/dokku to the new location:

cp -R /home/dokku/* /path/to/block/storage/dokku

NOTE: Before the next step, make sure all data was successfully copied to the new directory!

Now delete the current directory and mount to the new one:

sudo rm -rf /home/dokku
sudo mount --bind /home/dokku /path/to/block/storage/dokku

Now this is NOT permanent, so you need to modify fstab and place an entry in there as well:

nano /etc/fstab

and paste in:

/home/dokku   /path/to/block/storage/dokku   none    bind
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rafaelp February 9, 2017

Instead of copying files is better to move the folder

mv /home/dokku /path/to/block/storage/

When it says “Now delete the current directory and mount to the new one:” the command shuld be:

sudo rm -rf /home/dokku
mkdir /home/dokku
sudo mount --bind /path/to/block/storage/dokku /home/dokku

and /etc/fstab should be

/path/to/block/storage/dokku  /home/dokku   none    bind
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