Tech Tutorial: 363.1 GlusterFS Storage Clusters (weight: 5) #
Introduction #
In this tutorial, we’ll cover the essentials of setting up and managing GlusterFS storage clusters. GlusterFS is a scalable network filesystem suitable for data-intensive tasks such as cloud storage and media streaming. GlusterFS clusters together storage building blocks over Infiniband RDMA or TCP/IP interconnect, aggregating disk storage resources and managing data in a single global namespace.
Key Knowledge Areas: #
- Installation of GlusterFS
- Basic configuration of GlusterFS
- Creation and management of volumes
- Data replication
- Fault tolerance and recovery
Utilities: #
gluster
glusterd
glusterfs
glusterfsd
Step-by-Step Guide #
1. Installation of GlusterFS #
GlusterFS can be installed on various Linux distributions using their package management systems. Below are the commands to install GlusterFS on Ubuntu and CentOS:
For Ubuntu:
sudo apt-get update
sudo apt-get install -y software-properties-common
sudo add-apt-repository ppa:gluster/glusterfs-9
sudo apt-get update
sudo apt-get install -y glusterfs-server
For CentOS:
sudo yum install -y centos-release-gluster
sudo yum install -y glusterfs-server
After installation, enable and start the GlusterFS service:
sudo systemctl enable glusterd
sudo systemctl start glusterd
2. Basic Configuration of GlusterFS #
Initially, you need to add the servers that will form the GlusterFS cluster.
sudo gluster peer probe server1.example.com
sudo gluster peer probe server2.example.com
Check the status of the peer:
sudo gluster peer status
3. Creation and Management of Volumes #
Create a distributed GlusterFS volume:
sudo gluster volume create gv0 server1.example.com:/data/brick1/gv0 server2.example.com:/data/brick1/gv0
sudo gluster volume start gv0
Check the volume info:
sudo gluster volume info
4. Data Replication #
To create a replicated volume:
sudo gluster volume create gv1 replica 2 server1.example.com:/data/brick1/gv1 server2.example.com:/data/brick1/gv1
sudo gluster volume start gv1
5. Fault Tolerance and Recovery #
GlusterFS handles server failures by replicating data across multiple nodes. To simulate and check recovery, you can bring down a server and check if the data is still available:
# Simulate server failure
sudo systemctl stop glusterd
# On another server
sudo gluster volume info
Restart the glusterd service:
sudo systemctl start glusterd
6. Mounting GlusterFS Volumes #
Mounting a GlusterFS volume on client machines:
sudo mount -t glusterfs server1.example.com:/gv0 /mnt/glusterfs
Detailed Code Examples #
Here are more detailed examples of managing GlusterFS:
Adding a Brick to a Volume:
sudo gluster volume add-brick gv0 server1.example.com:/data/brick2/gv0
Remove a Brick:
sudo gluster volume remove-brick gv0 server1.example.com:/data/brick2/gv0 start
sudo gluster volume remove-brick gv0 server1.example.com:/data/brick2/gv0 status
sudo gluster volume remove-brick gv0 server1.example.com:/data/brick2/gv0 commit
Replace a Faulty Brick:
sudo gluster volume replace-brick gv0 server1.example.com:/data/brick1/gv0 server1.example.com:/data/brick2/gv0 commit force
Conclusion #
In this tutorial, we have covered the fundamentals of setting up and managing a GlusterFS cluster. From installation to data replication and fault tolerance, GlusterFS provides a robust solution for handling large volumes of data across networked resources. With the examples provided, you should be able to set up a basic GlusterFS cluster and explore its features.