# Glusterfs

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- Ceph

Glusterfs is a scalable network filesystem.

## Installation

Install the package glusterfs.

## Configuration

Glusterfs can be setup to run in many different configurations depending operating needs, including distributed and replicated. For the example below, a two node replicated server is being created, with nodes gluster1 and gluster2 each have two disks, one containing the OS (`sda`), the other to be shared by glusterfs (`sdb`). Unless stated, all setup is carried on gluster1:

- Start/enable `glusterd.service` on both servers.

- Connect the servers

     # gluster peer probe gluster2

- Partition and format the glusterfs drive on both servers
  - The upstream advises creating a single partition and formatting this as xfs

- On both servers automount the drives by appending `/etc/fstab` to include the following line, where `/dev/sdXY` is the appropriate device (e.g., `/dev/sdb1`).

    /etc/fstab

    /dev/sdXY /export/sdXY xfs defaults 0 0

- On both servers mount the drives. Then create a brick:

     # mkdir -p /export/sdXY/brick

- Enable replication on primary server

     # gluster volume create gv0 replica 2 gluster1.mydomain.net:/export/sdb1/brick gluster2.mydomain.net:/export/sdb1/brick

- Ensure volume is created correctly

     # gluster volume info

- Start volume

     # gluster volume start gv0

- Mount the volume

     # mkdir -p /mnt/glusterClientMount
     # mount -t glusterfs gluster1:/gv0 /mnt/glusterClientMount

## Automount gluster volume on boot

To mount a gluster volume on boot, systemd needs to wait for both the network, and the `glusterd` service to be started. You can specify the following fstab options to do this:

    /etc/fstab

    localhost:/gv0 /mnt/glusterClientMount glusterfs defaults,_netdev,x-systemd.requires=glusterd.service,x-systemd.automount 0 0

## See also

- Official glusterfs installation guide
- Blog covering the setup of Glusterfs on Arch Linux

Categories:

- Clustered file systems
- Distributed computing