High-Availability Storage With GlusterFS on CentOs 7 and Oracle Linux 7

Install Distributed Filesystem "GlusterFS". For example, create a distributed volume with 2 servers to be able to use it from GlusterFS Clients. This example shows to use 2 servers but it's possible to use more than 3 servers. +--------------------+ 10.0.0.61| | +-----+ GlusterFS Server#1 | +-----------------+ | eth0| | | |10.0.0.60 | +--------------------+ | GlusterFS Clint |------------+ | |eth0 | +--------------------+ +-----------------+ | eth0| | +-----+ GlusterFS Server#2 | 10.0.0.62| | +--------------------+

Fuente:  http://www.server-world.info/en/note?os=CentOS_7&p=glusterfs  [1] Configure the same settings on 2 GlusterFS servers like follows. It is recommended to create a directory for GlusterFS volume on the different partition from the / partition. This example uses /glusterfs directory which is mounted from different partition from / [root@gfs01 ~]# wget http://download.gluster.org/pub/gluster/glusterfs/LATEST/CentOS/glusterfs-epel.repo -O /etc/yum.repos.d/glusterfs-epel.repo [root@gfs01 ~]# yum -y install glusterfs-server [root@gfs01 ~]# systemctl start glusterd  [root@gfs01 ~]# systemctl enable glusterd [root@gfs01 ~]# vi /etc/hosts        # add GlusterFS servers 10.0.0.61 gfs01.server.world gfs01 10.0.0.62 gfs02.server.world gfs02 # create a directory for GlusterFS volume [root@gfs01 ~]# mkdir  /glusterfs/distributed       [2] Work on a server like follows. Ads by undefinedAd Options [root@gfs01 ~]# gluster peer probe gfs02      # search the server peer probe: success.   [root@gfs01 ~]# gluster peer status   Number of Peers: 1 Hostname: gfs02 Uuid: 89db2416-f997-479b-a016-a59130a78d13 State: Peer in Cluster (Connect)      create a volume [root@gfs01 ~]# gluster volume create vol_distributed transport tcp \ gfs01:/glusterfs/distributed \ gfs02:/glusterfs/distributed volume create: vol_distributed: success: please start the volume to access data [root@gfs01 ~]# gluster volume start vol_distributed # start the volume volume start: vol_distributed: success [root@gfs01 ~]# gluster volume info        # show info Volume Name: vol_distributed Type: Distribute Volume ID: 2d2b282a-09df-462d-a6e3-42c0471708d6 Status: Started Number of Bricks: 2 Transport-type: tcp Bricks: Brick1: gfs01:/glusterfs/distributed Brick2: gfs02:/glusterfs/distributed ************************************* create a volume with replication. Este seria otro ejemplo de creacion de un Volumen con replicacion. Next we create the share named testvol with two replicas (please note that the number of replicas is equal to the number of servers in this case because we want to set up mirroring) on server1.example.com and server2.example.com in the /data directory (this will be created if it doesn't exist): gluster volume create testvol replica 2 transport tcp server1.example.com:/data server2.example.com:/data [root@server1 ~]# gluster volume create testvol replica 2 transport tcp server1.example.com:/data server2.example.com:/data Creation of volume testvol has been successful. Please start the volume to access data. [root@server1 ~]# Start the volume: gluster volume start testvol   *************************************** [3] Configure GlusterFS Clients to use GlusterFS volume from GlusterFS servers.       [root@gfsclient ~]# wget http://download.gluster.org/pub/gluster/glusterfs/LATEST/CentOS/glusterfs-epel.repo -O /etc/yum.repos.d/glusterfs-epel.repo  [root@gfsclient ~]# yum -y install glusterfs glusterfs-fuse     mount the volume on /mnt [root@gfsclient ~]# mount -t glusterfs gfs01.server.world:/vol_distributed /mnt   [root@gfsclient ~]# df   -hat Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/centos-root xfs 46G 1.1G 45G 3% / devtmpfs devtmpfs 1.9G 0 1.9G 0% /dev tmpfs tmpfs 1.9G 0 1.9G 0% /dev/shm tmpfs tmpfs 1.9G 8.3M 1.9G 1% /run tmpfs tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup /dev/vda1 xfs 497M 120M 378M 25% /boot gfs01.server.world:/vol_distributed fuse.glusterfs 160G 65M 160G 1% /mnt